LTN156KT06
LTN156KT06
TO         : IT Solution
      DATE : Sep. 27, 2011.
                                                                     .tw
     SAMSUNG TFT-LCD
                                                 om
                                d.c
           NOTE : Extension code [ -8** ]
                      → LTN156KT06-8**
                slc
                  Surface type [ Anti-Glare ]
w.y
      The information described in this SPEC is preliminary and can be changed without prior notice.
ww
APPROVED BY :
          PREPARED BY :
                                   Khan Kim
                          Application
                           pp         Engineer
                                        g      Group
                                                   p
                  SAMSUNG ELECTRONICS CO., LTD.
Samsung Secret
   General Description
                 p                                               -------------------( 4 )
                                                                     .tw
   2. Optical Characteristics                                    -------------------( 7 )
   3 Electrical Characteristics
   3.                                                            - - - - - - - - - - - - - - - - - - - ( 10 )
      3.1 TFT LCD Module
      3.2 Backlight Unit
      3.3 LED Driver
                                                 om
   4. Block Diagram                                              - - - - - - - - - - - - - - - - - - - ( 13 )
      4.1 TFT LCD Module
   6. Interface Timing                                           - - - - - - - - - - - - - - - - - - - ( 21 )
                 slc
      6.1 Timing Parameters
      6.2 Timing Diagrams of interface Signal
      6.3 Power ON/OFF Sequence
   7. Outline Dimension                                          - - - - - - - - - - - - - - - - - - - ( 23 )
w.y
8. Packing -- - - - - - - - - - - - - - - - - -- ( 24 )
                                                                 -- - - - - - - - - - - - - - - - - - -( 31 )
ww
11. EDID
Samsung Secret
July. 4, 2011 P00 All The preliminary specification of LTN156KT06-8 was issued first.
Aug. 10, 2011 A00 All The approval specification was issued first.
                                                                     .tw
Aug. 25, 2011        A01         P7     Average Luminance of White was changed. Min 255 → 250 cd/m2
                                                   om
                                 d.c
                  slc
                                 CODE REVISION HISTORY
w.y
Samsung Secret
                                                                   .tw
  FEATURES
    • High contrast ratio
    • HD+ (1600 x 900 pixels ) resolution
    • Fast Response
    • LED Back Light with embedded LED Driver
                                                om
    • DE (Data enable) only mode
    • 3.3V LVDS Interface
    • Onboard EEDID chip
    • Green
      G      product
                d t (RoHS
                     (R HS compliant)
                                 li t)
    • APS function
    • 6bit-FRC
                              d.c
  APPLICATIONS
    • Notebook PC
    • If the usage of this product is not for PC application
                                                 application, but for others
                                                                      others, please contact SEC
                    slc
 GENERAL INFORMATION
Samsung Secret
                                                                                                .tw
               Weight                     -                      -          435                  g
                                                                     om
1. ABSOLUTE MAXIMUM RATINGS
  1.1 ENVIRONMENTAL ABSOLUTE RATINGS
                    Item                              Symbol               Min.                   Max.            Unit         Note
             Storage temperate                        TSTG                  -20                       60           C           (1)
         Operating temperate
                                                                                                                   C
     (Temperature of glass surface)
                                        d.c           TOPR                  0                        50                         (1)
  Note (1) Temperature and relative humidity range are shown in the figure below.
           95 % RH Max. (40 C  Ta)
                    slc
           Maximum wet - bulb temperature at 39 OC or less. (Ta  40 C ) No condensation
80
                                          60
                                                          Operating Range ( 50,50.4)
                                          40
                                                                                                 ( 60,27.7)
                                          20
ww
                                                          Storage Range
                                                  5
                                              0
                        -40       -20                 0              20      40             60              80
                                                      Temperature (OC)
       (2) 2ms, half sine wave, one time for X, Y,  Z.
       (3) 5 - 500 Hz, random vibration, 30min for X, Y, Z.
       (4) At testing
              t ti VibVibration
                           ti andd Sh
                                   Shock,
                                        k th
                                           the fi
                                               fixture
                                                  t    iin h
                                                           holding
                                                             ldi the
                                                                   th Module
                                                                      M d l to
                                                                             t be
                                                                               b ttested
                                                                                     t d have
                                                                                         h    tto b
                                                                                                  be
           hard and rigid enough so that the Module would not be twisted or bent by the fixture.
Samsung Secret
                                                                         .tw
           Logic Input Voltage             VIN          VDD - 0.3        VDD + 0.3            V            (1)
                                                     om
    (2) BACK-LIGHT UNIT
                                                                                Ta = 25  2 C , Duty = 100%
 Note (1) Permanent damage to the device may occur if maximum values are exceeded
          Functional operation should be restricted to the conditions described under normal operating conditions.
                    slc
w.y
ww
Samsung Secret
   The following items are measured under stable conditions. The optical characteristics
   should
    h ld b be measuredd iin a d
                              dark
                                 k room or equivalent
                                              i l t state
                                                      t t with
                                                           ith th
                                                               the methods
                                                                     th d shown
                                                                           h     iin N
                                                                                     Note
                                                                                        t (5)
                                                                                          (5).
   Measuring equipment : TOPCON SR-3
                                                                     .tw
           Item            Symbol      Condition    Min.     Typ.      Max       Unit         Note
      Contrast Ratio
                              CR                    300        -         -         -       (1), (2), (5)
        (5 Points)
                                                   om
   Response Time at Ta
                              TRT                    -        16        25      msec         (1), (3)
    ( Rising + Falling )
                              WX                             0.313
                  White
                              WY                             0.329
                              L                     -        45         -
                   Hor.
ww
                              R                     -        45         -
    Viewing                            CR  10                                               (1), (5)
                                                                                             (1)
                                                                               Degrees
     Angle                             At center                                              SR-3
                              H                     -        15         -
                   Ver.
                              L                     -        30         -
        13 Points
                               L                    -         -        1.7        -            (6)
      White Variation
Color Gamut CG - 45 - %
Samsung Secret
                                                                Normal Line
                                                                 = 0o ,  = 0o
                                                 L
                                                                                  R
                                                       L           H                                  12 O’clock
                    L =90o       x                                                           y         direction
                                                                                                         H = 90o
                                                                                       .tw
            6 O’clock        y'                                                                   x'
            direction
                                                                                                        R =90o
             L= 90o
                                                                om
   Note 2) Definition of Contrast Ratio (CR) : Ratio of gray max (Gmax) ,gray min (Gmin)
           at 5 points(4, 5, 7, 9, 10)
                                                        TR                                             TF
                             100%
                              90%
w.y
          Optical
          Response
                             10%
                              0%
                                                                                                                         Time
   Note 4) Definition of Average Luminance of White : measure the luminance of white at 5 points.
ww
                                                                                             : test point
Samsung Secret
                          Photo-detector
                         ( TOPCON SR-3 )
                                                                               .tw
                                                         om
                                        Field = 2
                                                                       50 cm
                        10mm                                                   10mm
                                      25%            50%              75%
             10mm
                             13                      12                        11
ww
10 9 25%
5 4 75%
                             3                       2                         1
           10mm
Samsung Secret
                                                                                   .tw
   Receiver Threshold
Vsync Frequency fv - 60 - Hz
                                                            om
    Current of Power
                               Mosaic      IDD               -           330           -         mA         (2),(3)*b
         Supply
   Note (1) Display data pins and timing signal pins should be connected.( GND = 0V )
                                          d.c
          (2) fV = 60Hz, fDCLK = 50.2MHZ, VDD = 3.3V , DC Current.
          (3) Power dissipation pattern
           *c) V.Stripe
ww
Samsung Secret
                            3.3V                             M1
                                                             2SK1059
                                                                                           VDD ( LCD   INPUT)
                                                                           FUSE
                                   R1                                                C1
                                   47K                                               1uF
                                               R2
  CONTROL SIGNAL                                               M2
  (HIGH to LOW)
                                                                                  .tw
                                               1K              2SK1399
                      12V
                                     R3                 C2
                            C3           47K
                                                        10000pF
                            1uF
0.9VDD
                                                               om                   3.3V
                                         d.c
                                                    0.1VDD
                      GND
                                                                          470us
                   slc
w.y
ww
Samsung Secret
                                                                              .tw
     Operating Life Time        Hr        10,000          -           -          Hour               (1)
  Note (1) Life time (Hr) of LEDs can be defined as the time in which it continues to operate under the
           condition Ta= 25  2 C and IF = 27mA until one of the following event occurs.
         1. When the brightness becomes 50% or lower than the original.
                                                     om
                                      d.c
   - On board LED Driver (Manufacturer : Richtek)                                                 Ta= 25  2 C
     EN Control
        C t lL  Levell
                                OFF              0        0           0.5           V
Samsung Secret
                       I2 C b
                            bus             EDID
                                           EEPROM
                             LVDS
                                                                    Ai-Pi+
          Input-Connector
                                     LVDS Input/Aipi+Output
     I-PEX 20455-040E-0                Timing Controller
                                                                             .tw
           or Compatible
                                                                                  Source
                                                                                  Driver
                                                                                    IC             15 6”HD
                                                                                                   15.6”HD+
                                                                                                 TFT-LCD Panel
                            DC-DC                Gamma
                           Converter
                                                       om
                                                 Generator
          LED Power
            Control
                                                 VCOM
                                                Generator
                           LED B/L
                                       d.c     SOURCE PCB
             Video Signal
             Control Signal
             VCOM
             LED Power&signal
                   slc
             DVDD
             AVDD
             Von/Voff
             Gamma
             Feedback
w.y
                           D1     D2      D3     D4   D5       D6     D7     D8    D9      D10
 Anode
ww
Cathode
Samsung Secret
5.1. Input Signal & Power (LVDS, Connector IPEX 20455 's or Compatible)
   No
   No.     Symbol                              Function                       Polarity     Remarks
    1       VCC        Power Supply 3.3V (typical)
    2       VCC        Power Supply 3.3V (typical)
    3     VCC_EDID     VCC_EDID
                                                                       .tw
    4       WPN        No Connection
    5       CLK        CLK EDID
                       CLK_EDID
    6       DATA       DATA_EDID
    7     Odd RIN0-    - LVDS differential data input (G0, R0-R5)             Negative
                                                   om
    8     Odd RIN0+    + LVDS differential data input (G0, R0-R5)             Positive
    9     Odd RIN1-    - LVDS differential data input (B0-B1, G1-G5)          Negative
   10     Odd RIN1+
              RIN1     + LVDS differential data input (B0-B1,
                                                      (B0 B1, G1
                                                              G1-G5)
                                                                 G5)          Positive
   11       GND        Ground
   12     Odd RIN2-    - LVDS differential data input (B2-B5, DE, VS, HS)     Negative
                                d.c
   13     Odd RIN2+    + LVDS differential data input (B2-B5, DE, VS, HS)     Positive
   14       GND        Ground
   15     Odd CLK-     - LVDS differential clock input
                                                   p ((Odd Clock))            Negative
                                                                                g
   16     Odd CLK+     + LVDS differential clock input (Odd Clock)            Positive
                  slc
   17       GND        Ground
   18     Odd RIN3-    - LVDS differential data input (R6-R7, G6-G7, B6-B7)   Negative
   19     Odd RIN3+    + LVDS differential data input (R6-R7, G6-G7, B6-B7)   Positive
w.y
   20
    0       GND
            G          Ground
                       G ou d
   21     Even RIN0-   - LVDS differential data input (G0, R0-R5)             Negative
   22     Even RIN0+   + LVDS differential data input (G0, R0-R5)             Positive
   23     Even RIN1-   - LVDS differential data input (B0-B1, G1-G5)          Negative
   24     Even RIN1+   + LVDS differential data input (B0-B1, G1-G5)          Positive
ww
   25       GND        Ground
   26     Even RIN2-   - LVDS differential data input (B2-B5, DE, VS, HS)     Negative
   27     Even RIN2+   + LVDS differential data input (B2-B5, DE, VS, HS)     Positive
   28       GND        Ground
   29     Even CLK-    - LVDS differential clock input (Even Clock)           Negative
   30     Even CLK+    + LVDS differential clock input
                                                   p ((Even Clock))           Positive
Samsung Secret
                                                                     .tw
   35      BL_EN       BL_EN
   36       PWM        PWM
   37       GND        Ground
   38        VBL       VBL
   39        VBL       VBL
                                                 om
   40        VBL       VBL
                                d.c
                   slc
w.y
ww
Samsung Secret
                                                                          .tw
     5.2.2 LVDS AC Input
                                                    om
                                  d.c
                  ITEM                     SYMBOL       MIN.         TYP.     MAX.       UNIT       NOTE
Samsung Secret
                                                          .tw
                                            om
                             d.c
   Note (3) : SSC ( Spread Spectrum Clock)
                slc
w.y
ww
Samsung Secret
                                                           .tw
                                         om
                           d.c
               slc
w.y
ww
Samsung Secret
                                                                     .tw
                                                     om
                                   d.c
                    slc
w.y
ww
1 1600
Line 1 R G B R G B R G B R G B
                                                            .tw
                                         LTN156KT06 Panel
                                             om
 Line 900   R G B R G B
                             d.c                                  R G B R G B
                  slc
w.y
ww
Samsung Secret
                                                                      .tw
       Vertical Active    Display
                                          TVD    -              900             -         Lines
       Display Term       Period
        One Line
                          Cycle           TH    864             896            928        Clocks   2ch
      Scanning Time
                                                om
      Horizontal Active   Display
                                          THD    -              800             -         Clocks   2ch
       Display Term       Period
                                    TVD
                     slc
 DE
w.y
TH
      DCLK
                          TC
ww
THD
DE
Samsung Secret
    : To prevent a latch-up or DC operation of the LCD module, the power on/off sequence
      should be as the diagram below.
                                                                                  .tw
                                                   T2                                           T3
Signals VALID
                                 0V
                                                                   T8             T9
                                                        om
                                                0.9 LED Vin                                  0.9 LED Vin
          LED Power (Vin)                    0.1 LED Vin                                        0.1 LED Vin
                                                                        T10       T11
                                 Delay
                                     y from VDD to valid data at p
                                                                 power ON
w.y
0<T2 ≤50
0<T3 ≤50 Delay from valid data OFF to VDD OFF at power Off
200 ≤T6 Delay from valid data off to B/L disable at power Off
0<T7 ≤10
0 ≤T10 Delay from LED driver Vin rising time 90% to PWM ON
0≤T11 Delay from PWM Off to LED driver Vin falling time 10%, Must Keep rule
0≤T12 Delay from PWM ON to B/L Enable ON, Must Keep rule
                                                .tw
                                      om
                            d.c
               slc
w.y
ww
Samsung Secret
                                                                                       ڸڠڵڤڮگڰڪڶڎډڋڏډڔڐڎ
                                                                                       ڸکڠګڪٻڧڠڵڠڝڶڄڎڋډڔڏڎڃ
                                                                                      ڸڜڠڭڜٻڠڱڤگڞڜڶڄڍڎڍډڏڏڎڃ
                                                                                     ڄڠڧڪڣٻڪگٻڠڧڪڣڃڎډڋڎڋډڐڍڎ                                                                                                                                                                                                                                 ڳڜڨړډڎ
ڄڒډڔڒڌڃ ڐڌډڋڐڏډڌڈڏ
                                                                                                                ڄڒډڍڃ
                                                                                                                                                                                             ڄڒڒډڌڋڌڃ
                                                                   ww
              ڄڎڌډڐڃ
                                                                                                                                                                                                                                 ڸکڠګڪٻڧڠڵڠڝڶڄڏڍډړڔڌڃ
                                                                                                                                                                                                        ڸڜڠڭڜٻڠڱڤگڞڜڶڄڑڎڐډڎڔڌڃ
                                                                                                                                                                                                                                                        ڸڠڵڤڮگڰڪڶڎډڋڐڏډڔڋڍ
                                                                                                                                                                                                                                                                              ڄڠڧڪڣٻڪگٻڠڧڪڣڃڎډڋڐڋډڑڌڍ
                                                                                                                                                                                                                                                                                                         ڸڠڢکڜڧڡٻڣگڤڲٻڠڵڤڮگڰڪڶڐډڋڐڏډڍڍڍ
                                                                                                                                                                                                                                                                                                                                                          ڞ
ڞ ڮڰ
                                                                                                                                                                                                                                                                                                                                                                                ٻڳڳڳڳڳڳڳګڮڰڊڳڳڳڳڳڳڳګڮڰ
                                                                                                                                                                                                 ڄڏڌډڐڃ                                                                                                                                                       ڜکڤڣڞٻکڤٻڠڟڜڨ
                                                                                                                w.y
                                                                                                                                                                                                                                                                                                                                                                                                           کڤګڌپ
ڳڜڨٻڋډڏ
                                                                                                                                             ڄڌڐډړڃ
                                                                                                                                                                  slc
                                                                                       ٽڂڜٽڈٽڜٽٻکڪڤگڞڠڮ
           ڄڒڑډڑڃ      ڄڐڌڃ
                                                                                                                                                                                                                                                        d.c
           ڎډڋڒڌډڌڌ                             ڌډڋڑ                                   ڄڐڌڃ         ڄڒډڑڃ
                                                                                                                                                                                                                                                                                                                                                                                                                       ڞ
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               ڞ
ڌډڋڑ ڎډڋڍډڌڌ
                                       ڎډڋڍډڎ
             ڍڭ
                                                                           ڎډڋڍډڎ
                                                                                                ڎډڋ     ڍڭ                                                                                                                                                                                                                                                                                                    ڢکڤکڠګڪٻڧڠڵڠڝ                                                                   ڧڪګٻڡڞ
           ڍډڌڭ
                                                 ڄڔډڑڃ
                                                                                                                                                                                                                                                                                                                                                                                          ڜ                                                            ڝ                         ڜ                        ڝ
                                                                                                                                                                                                                                                                                                                                                                                                                   ڜڠڭڜٻڠڱڤگڞڜ                                                              ڜڠڭڜٻڠڱڤگڞڜ
                                                                   ڄڔډڑڃ
                                                                                                                                                                                                                                                   ڄڌډڑڃ
                                                                                                                               ڄڌډڑڃ
                                                                                                       ڍډڌڭ
                                                                                                                                                                                           ڎډڋ
                                                                                                                            ڎډڋڐڋډڐڎ
                                                                                                                                                            ڍڭ
                                                                                                                                                                                           ڌڭ
ڍڭ
                                                                                                                                        ڍډ
                                                                                                                                                                                            ڍډ
                                                                                                                                        ڌڭ
                                                                                                                          ڄڐڐډڋڎڃ                     ڄڔڃ
                                                                                                                                                                                                                                                                                                                                                         om
                                                                                                                                                                                                                  ڎډڋڐڋډڐڎ
                                                                                                                                                                 ڎډڋڍډڎ
                                                                                                                                                                           ڎډڋڍډڎ
                                                                                                                                                                                     ڄڔڃ                                                       ڄڐڐډڋڎڃ
                                                                                                                                                                                                                                                                                                                                                                                                                       ڟ
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               ڟ
                    ٻٽڜٽٻڲڠڤڱٻڧڤڜگڠڟ
                    ڌڕڍٻڠڧڜڞڮٻٻٻ
                                                                   ٻٽڝٽٻڲڠڤڱٻڧڤڜگڠڟ                                     ٻٽڞٽٻڲڠڤڱٻڧڤڜگڠڟ                                              ٻٽڟٽٻڲڠڤڱٻڧڤڜگڠڟ
                                                                   ڌڕڍٻڠڧڜڞڮٻٻٻ                                         ڌڕڍٻڠڧڜڞڮٻٻٻ                                                  ڌڕڍٻڠڧڜڞڮٻٻٻ
ڭ                                                                                                                                                                                                                                                                                                                                                                                     ڠڞکڜڭڠڧڪگٻڧڜڭڠکڠڢ
ڠ                                                                                                                                                                                                                                                                                                                                                                             ګڠگڮ         ڌٻڧڠڱڠڧ       ڍٻڧڠڱڠڧ     ڎٻڧڠڱڠڧ
                                                                                                                                                                                                                                                                                                                                                                                                                               گڤکڰ    ۈۈ   ڴڝٻکڂڜڭڟ       ڴڝٻڟڂڮڠڟ   ڴڝٻڟڂڦڣڞ   ڴڝٻڟڂګګڜ
ڱ
                                                                                                                                                                                                                                                                                                                                                                                                                               ڠڧڜڞڮ   ڊ
ڤ                                                                                                                                                                                                                                                                                                                                                                                                                                                      ڠڠڧډکډڥ                   ڨڤڦډڮډڨ
ڮ
ڤ                                                                                                                                                                                                                                                                                                                                                                                                                                                                                ڪکٻډڞڠګڮ
ڪ
ک
                                                                                                                                                                                                                                                                                                                                                                              .tw
 8. PACKING                                                            Approval
  1. CARTON(Internal Package)
                                                          .tw
                                         om
                           d.c
              slc
w.y
Samsung Secret
                                                                           .tw
      5                       Carton                         1 set
                                                    om
     (1)Parts number : LTN156KT06
     (2)Revision code : 3 letters
     (3)Lot number     : X X X X XXX XX X              8**
                                                     SEC Revision Code
                                d.c                  Panel number
                                                     Cell ID
                                                     Lot ID
                                                     Month
                                                     Year
                                                     Product Code
                                                     Line
                slc
     (4) Nameplate Indication
w.y
                                       LTN156KT06
                 1132                                                      40 mm
                                       XXXXXXXXXX                    8**
ww
                                       USPXXXXXXX/USPXXXXXXX
                 MADE IN CHINA
80 mm
Samsung Secret
                   DEVICE          : LTN156KT06
                   TYPE            : 8**
                   QUANTITY        : 36 PCS
                                                            .tw
                          CO6040001
                                              om
                              d.c
               slc
w.y
ww
Samsung Secret
1. Handling
  (b) Refrain from strong mechanical shock and / or any force to the module. In addition to
      damage, this may cause improper operation or damage to the module and LED back-light.
                                                                 .tw
  (c) Note that polarizers are very fragile and could be easily damaged. Do not press or scratch
      the
       h surface
             f    h
                  harder
                     d than
                          h a HB pencilil llead.
                                               d
  (d) Wipe off water droplets or oil immediately. If you leave the droplets for a long time,
      Staining and discoloration may occur.
                                                om
  (e) If the surface of the polarizer is dirty, clean it using some absorbent cotton or soft cloth.
  (f) The desirable cleaners are water, IPA (Isoprophyl Alcohol) or Hexane.
      Do not use Ketone type materials(ex. Acetone), Ethyl alcohol, Toluene, Ethyl acid or Methyl
      chloride. It might permanent damage to the polarizer due to chemical reaction.
                                d.c
  (g) If the liquid crystal material leaks from the panel, it should be kept away from the eyes or
       mouth . In case of contact with hands, legs or clothes, it must be washed away thoroughly
       with soap.
                  slc
  (h) Protect the module from static , it may cause damage to the C-MOS Gate Array IC.
  (i) Use fingerstalls with soft gloves in order to keep display clean during the incoming
       inspection and assembly process.
 w.y
(l) Do not adjust the variable resistor which is located on the back side.
  (m) Protection film for polarizer on the module shall be slowly peeled off just before use so
ww
     th t the
     that th electrostatic
               l t t ti charge
                            h      can be
                                        b minimized.
                                            i i i d
(n) Pins of I/F connector shall not be touched directly with bare hands.
Samsung Secret
                                                               .tw
                                              om
                               d.c
3. OPERATION
                  slc
   (a) Do not connect,disconnect the module in the “ Power On” condition.
   (b) Power supply should always be turned on/off by following item 6.3
       “ Power on/off sequence “.
 w.y
   (c) Module has high frequency circuits. Sufficient suppression to the electromagnetic
       interference shall be done by system manufacturers. Grounding and shielding methods
       may be important to minimize the interference.
   (d) The standard limited warranty is only applicable when the module is used for general
       notebook applications. If used for purposes other than as specified, SEC is not to be
ww
       h ld reliable
       held    li bl for
                      f the
                         th defective
                             d f ti operations.
                                              ti   It iis strongly
                                                           t    l recommended
                                                                          d d tto contact
                                                                                     t t SEC
       to find out fitness for a particular purpose.
Samsung Secret
 (c) Do not exceed the absolute maximum rating value. ( the supply voltage variation, input
     voltage variation, variation in part contents and environmental temperature, so on)
                                                                   .tw
     Otherwise the module may be damaged.
 (d) If the module displays the same pattern continuously for a long period of time
                                                                               time,it
                                                                                    it can be
     the situation when the image “sticks” to the screen.
(e) This module has its circuitry PCB’s on the rear side and should be handled carefully in
                                                om
     order not to be stressed.
                                d.c
                  slc
 w.y
ww
Samsung Secret
                                            .tw
                                  om
                         d.c
              slc
w.y
ww
Samsung Secret
                                            .tw
                                  om
                         d.c
              slc
w.y
ww
Samsung Secret