CN2613785Y - Backlight component - Google Patents

Backlight component Download PDF

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Publication number
CN2613785Y
CN2613785Y CN 03244308 CN03244308U CN2613785Y CN 2613785 Y CN2613785 Y CN 2613785Y CN 03244308 CN03244308 CN 03244308 CN 03244308 U CN03244308 U CN 03244308U CN 2613785 Y CN2613785 Y CN 2613785Y
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CN
China
Prior art keywords
light
light guide
guide plate
semi
backlight assembly
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Expired - Lifetime
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CN 03244308
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Chinese (zh)
Inventor
黄华男
麦哲魁
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TPO Displays Corp
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Toppoly Optoelectronics Corp
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Priority to CN 03244308 priority Critical patent/CN2613785Y/en
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Abstract

The utility model provides a backlight assembly, which comprises a luminous body for providing light; a light guide plate group which is positioned at two side edges of the luminous body and is used for guiding the scattering direction of the light; a semi-permeable membrane located above the light-emitting body and having a plurality of holes; and a reflecting plate located below the light guide plate for reflecting the light back to the light guide plate to raise the utilization efficiency of the light. The light can be guided out upwards through the holes of the semi-permeable membrane, and can also be guided out upwards through the light guide plate by means of reflection of the semi-permeable membrane and the reflecting plate.

Description

Backlight assembly
(1) technical field
The relevant a kind of backlight assembly of the utility model is especially about a kind of backlight assembly that is applied to panel of LCD.
(2) background technology
Backlight assembly (Backlight Module) is the key part and component of LCD (LCD) panel, because liquid crystal itself can't be luminous, the function of backlight assembly just is to supply the light source that brightness is abundant and be evenly distributed, and makes normally show image of panel.Because the LCD panel has been widely used in numerous electronic products with growth potentiality, as monitor, notebook computer, digital camera, personal digital assistant, projector etc., the demand of backlight assembly and relevant spare part thereof is naturally also along with continuing growth.
See also Fig. 1, it is to be known backlight assembly structural representation.Backlight assembly is mainly assembled by light source 10, light guide plate 11, reflecting plate 12, diffuser plate 13, prismatic lens 14 and housing etc.Light source 10 must possess characteristics such as high brightness and life-span length, present light source has cold cathode fluorescent lamp (Cold CathodeFluorescent Lamp, CCFL) and hot cathode fluorescent lamp, light emitting diode (LED), electroluminescence sheet (EL) etc., wherein be main flow with CCFL.The effect of light guide plate 11 is the scattering direction of direct light, is used for improving the briliancy of panel, and guarantees the homogeneity of panel luminance.Light guide plate 11 is to utilize the method for ejection formation that propylene is pressed into ganoid plate, then with having the high reflection and the material of extinction not, stamp the diffusion point in the bottom surface of light guide plate 11, when light is run into the diffusion point, reflected light can be toward all angles diffusion, destroy conditioned reflex then and penetrate, utilize various densitys, diffusion point not of uniform size, can make light guide plate 11 uniformly light-emittings by light guide plate is positive.In the light reflected back light guide plate 11 that the purposes of reflecting plate 12 is the bottom surface is exposed, be used for promoting the service efficiency of light.Effect as for diffuser plate 13 is to allow the distribution of light more even, makes shadow that can't see reflection spot from the front.Yet because after 13 ejaculations of light self-diffusion plate, the non-constant of the directive property of its light must utilize prismatic lens 14 to revise direction of light, reaches the effect of optically focused, promotes positive brightness.
Generally speaking, backlight assembly can be divided into " straight-down negative " and " side-light type " two kinds of designs according to light source position, and large size panel mostly utilizes the straight-down negative design at present.The straight-down negative design places fluorescent tube under the assembly, but because fluorescent tube is mutually far short of what is expected with the briliancy of other backlight assemblies, makes can be easy to see tangible lamp tube light source on panel, and causes the puzzlement in the design of site.For avoiding this phenomenon, usually light guide plate is thickeied to certain thickness, will design lessly and separation near the site of light source again, too obvious to prevent fluorescent tube, cause uneven backlight assembly, but this design has increased the weight and the thickness of backlight assembly also simultaneously.
(3) utility model content
The purpose of this utility model provides a kind of backlight assembly, and it can evenly disperse the light source of fluorescent tube, avoids fluorescent tube too obvious.
Another purpose of the present utility model provides a kind of backlight assembly, and weight and thickness that it can alleviate backlight assembly meet the lightening trend of present LCD panel.
For reaching above-mentioned purpose, the utility model provides a kind of backlight assembly, and it comprises a luminophor, in order to light to be provided; One light guide plate group is positioned at the dual-side of this luminophor, in order to guide the scattering direction of this light; One semi-permeable diaphragm is positioned at the top of this luminophor, and has a plurality of holes; An and reflecting plate, be positioned at the below of this light guide plate, it can be with in this this light guide plate of light reflected back, in order to promote the service efficiency of this light, wherein, this light can upwards be derived through this holes of this semi-permeable diaphragm, also can upwards derive via this light guide plate with the reflection of this semi-permeable diaphragm and this reflecting plate again.
According to above-mentioned conception, wherein this luminophor comprises at least one fluorescent tube.
According to above-mentioned conception, wherein this light guide plate group comprises two light guide plate.
According to above-mentioned conception, wherein this light guide plate is a clapboard.
According to above-mentioned conception, wherein the thick side of this clapboard is near this luminophor.
According to above-mentioned conception, wherein this semi-permeable diaphragm is curved.
According to above-mentioned conception, this backlight assembly also comprises a diffuser plate, is positioned at the top of this light guide plate group and this semi-permeable diaphragm, uses so that the distribution of this light is more even.
According to above-mentioned conception, this backlight assembly also comprises a prismatic lens, is the top that is positioned at this diffuser plate, in order to revise the direction of this light, reaches the effect of optically focused.
The utility model provides a kind of backlight assembly on the other hand, and it comprises a luminophor, in order to light to be provided; One light guide plate group is positioned at the dual-side of this luminophor, in order to guide the scattering direction of this light; One semi-permeable diaphragm is positioned at the top of this luminophor, and has a plurality of holes; And a diffuser plate, be positioned at the top of this light guide plate group and this semi-permeable diaphragm, with so that the distribution of this light is more even, wherein, this light can upwards be derived through this holes of this semi-permeable diaphragm, also can upwards derive via this light guide plate with the reflection of this semi-permeable diaphragm again.
According to above-mentioned conception, wherein this luminophor comprises at least one fluorescent tube.
According to above-mentioned conception, wherein this light guide plate group comprises two light guide plate.
According to above-mentioned conception, wherein this light guide plate is a clapboard.
According to above-mentioned conception, wherein the thick side of this clapboard is near this luminophor.
According to above-mentioned conception, wherein this semi-permeable diaphragm is curved.
According to above-mentioned conception, this backlight assembly also comprises a reflecting plate, is positioned at the below of this light guide plate, and it can be with in this this light guide plate of light reflected back, in order to promote the service efficiency of this light.
According to above-mentioned conception, this backlight assembly also comprises a prismatic lens, is positioned at the top of this diffuser plate, in order to revise the direction of this light, reaches the effect of optically focused.
The another aspect of the utility model provides a kind of backlight assembly, and it comprises a luminophor, in order to light to be provided; One light guide plate group is positioned at the dual-side of this luminophor, in order to guide the scattering direction of this light; And a semi-permeable diaphragm, be positioned at the top of this luminophor, and have a plurality of holes, wherein, this light can upwards be derived through this holes of this semi-permeable diaphragm, but the also reflection of this semi-permeable diaphragm of mat is upwards derived via this light guide plate again.
According to above-mentioned conception, wherein this luminophor comprises at least one fluorescent tube.
According to above-mentioned conception, wherein this light guide plate group comprises two light guide plate.
According to above-mentioned conception, wherein this light guide plate is a clapboard.
According to above-mentioned conception, wherein the thick side of this clapboard is near this luminophor.
According to above-mentioned conception, wherein this semi-permeable diaphragm is curved.
According to above-mentioned conception, this backlight assembly also comprises a reflecting plate, is positioned at the below of this light guide plate, and it can be with in this this light guide plate of light reflected back, in order to promote the service efficiency of this light.
According to above-mentioned conception, this backlight assembly also comprises a diffuser plate, is positioned at the top of this light guide plate group and this semi-permeable diaphragm, uses so that the distribution of this light is more even.
According to above-mentioned conception, this backlight assembly also comprises a prismatic lens, is positioned at the top of this diffuser plate, in order to revise the direction of this light, reaches the effect of optically focused.
The utility model, can be more clearly understood in conjunction with the accompanying drawings to the detailed description of embodiment by following.
(4) description of drawings
Fig. 1 is known backlight assembly structural representation.
Fig. 2 is the semi-permeable diaphragm synoptic diagram for the utility model preferred embodiment.
Fig. 3 is the backlight assembly structural representation for the utility model preferred embodiment.
(5) embodiment
For improving the too tangible problem of fluorescent tube in the known backlight assembly, the utility model is the design that increases by a semi-permeable diaphragm in backlight assembly.See also Fig. 2, it is semi-permeable diaphragm 20 synoptic diagram for the utility model preferred embodiment.This semi-permeable diaphragm 20 is to be arranged at fluorescent tube 21 tops, and has a plurality of holes 201 on the semi-permeable diaphragm 20, in order to disperse the light source of fluorescent tube, avoids fluorescent tube too obvious.This semi-permeable diaphragm 20 has shaded effect, and its base material can be selected from general PI and PC etc.When light during, the derivation that can directly make progress, and, can be reflected downwards, upwards derive through light guide plate again when light during through the non-broken hole position of semi-permeable diaphragm 20 through the holes 201 of semi-permeable diaphragm 20.The size of holes 201, distribution and spacing design etc. on this semi-permeable diaphragm 20, the gradient and the indentation design of the light guide plate of can arranging in pairs or groups simultaneously reach optimization.In addition, this semi-permeable diaphragm 20 can also a radian be arranged at the top of this fluorescent tube 21.
See also Fig. 3, it is the backlight assembly structural representation for the utility model preferred embodiment.This backlight assembly comprises a luminophor 30, a light guide plate group 31, a semi-permeable diaphragm 32, a reflecting plate 33, a diffuser plate 34, a prismatic lens 35 and housing 36.This luminophor 30 can comprise at least one fluorescent tube, in order to light to be provided.This light guide plate group then comprises two wedge shape light guide plate 31, lay respectively at the dual-side of luminophor 30, wherein, the thick side of this wedge shape light guide plate 31 is near this luminophor 30, and the light that this luminophor 30 is sent can further be guided the scattering direction of light again toward the thin side conduction of this light guide plate 31 by this light guide plate 31.This semi-permeable diaphragm 32 is the tops that are positioned at this luminophor 30, and has a plurality of holes, in order to disperse the light source of fluorescent tube, avoids fluorescent tube too obvious.This reflecting plate 33 is the belows that are positioned at this light guide plate 31, in its this light guide plate 31 of light reflected back that the bottom surface can be exposed, is used for promoting the service efficiency of light.This diffuser plate 34 is the tops that are positioned at this light guide plate 31 and this semi-permeable diaphragm 32, uses so that the distribution of this light is more even.35 tops that are positioned at this diffuser plate 34 of this prismatic lens in order to revise the direction of light, reach the effect of optically focused.
According to above-mentioned backlight assembly, the light that is sent by the arbitrary fluorescent tube in the luminophor 30 is at first toward penetrating from all directions, when light conducts toward the light guide plate 31 of dual-side, can be by the effect of diffusion point or reflection spot in the light guide plate 31, light upwards is directed to LCD panel 37, and can be by the effect of reflecting plate 33, in this light guide plate 31 of the light reflected back that will expose, further upwards derive again.When the light that sends when fluorescent tube up conducts, if when the holes of this semi-permeable diaphragm 32, the derivation that can directly make progress, and when light during through the non-broken hole position of this semi-permeable diaphragm 32, can be downwards by 32 reflections of this semi-permeable diaphragm, further upwards derive again through the effect of this light guide plate 31 and this reflecting plate 33.So utilize the holes design of this semi-permeable diaphragm 30, can evenly disperse lamp tube light source, avoid fluorescent tube too obvious.
In sum, backlight assembly of the present utility model is the centre that fluorescent tube is placed two wedge shape light guide plate, has the advantage of clapboard, can strengthen the control to light going direction, and can alleviate the weight and the thickness of backlight assembly, meet the lightening trend of present LCD panel.In addition, backlight assembly of the present utility model adds a semi-permeable diaphragm above fluorescent tube, utilizes the holes design on the semi-permeable diaphragm, can disperse lamp tube light source, avoids fluorescent tube too obvious, and makes backlight assembly have preferable homogeneity.

Claims (10)

1.一种背光组件，其特征在于，包含：1. A backlight assembly, characterized in that, comprising: 一发光体，用以提供光线；a luminous body for providing light; 一导光板组，位于该发光体的两侧边以引导该光线的散射方向；A light guide plate group, located on both sides of the illuminant to guide the scattering direction of the light; 一半透膜，位于该发光体的上方且具有多个破孔；以及a semi-permeable membrane positioned above the illuminant and having a plurality of perforations; and 一反射板，位于该导光板的下方以将该光线反射回该导光板中；a reflection plate, located below the light guide plate to reflect the light back into the light guide plate; 其中，该光线通过该半透膜的该破孔向上导出，或通过该半透膜及该反射板的反射再经由该导光板向上导出。Wherein, the light is led upwards through the perforation of the semi-permeable film, or is reflected by the semi-permeable film and the reflection plate and then led upwards through the light guide plate. 2.如权利要求1所述的背光组件，其特征在于，该发光体包含至少一个灯管。2. The backlight assembly as claimed in claim 1, wherein the illuminant comprises at least one light tube. 3.如权利要求1所述的背光组件，其特征在于，该导光板组包含二导光板，而该导光板为楔形板，且该楔形板的厚侧端靠近该发光体。3. The backlight assembly according to claim 1, wherein the light guide plate set comprises two light guide plates, and the light guide plates are wedge-shaped plates, and the thick side ends of the wedge-shaped plates are close to the illuminant. 4.如权利要求1所述的背光组件，其特征在于，该半透膜是呈弧形。4. The backlight assembly as claimed in claim 1, wherein the semi-permeable film is arc-shaped. 5.如权利要求1所述的背光组件，其特征在于，还包含：5. The backlight assembly according to claim 1, further comprising: 一扩散板，位于该导光板组及该半透膜的上方；以及a diffuser plate located above the light guide plate set and the semi-permeable film; and 一棱镜片，位于该扩散板的上方以修正该光线的方向并聚光。A prism sheet is located above the diffusion plate to correct the direction of the light and focus it. 6.一种背光组件，其特征在于，包含：6. A backlight assembly, characterized in that it comprises: 一发光体，用以提供光线；a luminous body for providing light; 一导光板组，位于该发光体的两侧边以引导该光线的散射方向；A light guide plate group, located on both sides of the illuminant to guide the scattering direction of the light; 一半透膜，位于该发光体的上方且具有多个破孔；以及a semi-permeable membrane positioned above the illuminant and having a plurality of perforations; and 一扩散板，位于该导光板组及该半透膜的上方；a diffusion plate, located above the light guide plate group and the semi-permeable film; 其中，该光线经该半透膜的该破孔向上导出，或通过该半透膜的反射再经由该导光板向上导出。Wherein, the light is guided upwards through the perforation of the semi-permeable film, or is guided upwards through the light guide plate after being reflected by the semi-permeable film. 7.如权利要求6所述的背光组件，其特征在于，还包含：7. The backlight assembly according to claim 6, further comprising: 一反射板，位于该导光板的下方以将该光线反射回该导光板中；及a reflective plate positioned below the light guide plate to reflect the light back into the light guide plate; and 一棱镜片，位于该扩散板的上方以修正该光线的方向并聚光。A prism sheet is located above the diffusion plate to correct the direction of the light and focus it. 8.一种背光组件，其特征在于，包含：8. A backlight assembly, characterized in that it comprises: 一发光体，用以提供光线；a luminous body for providing light; 一导光板组，位于该发光体的两侧边以引导该光线的散射方向；以及A light guide plate group, located on both sides of the illuminant to guide the scattering direction of the light; and 一半透膜，位于该发光体的上方且具有多个破孔；a semi-permeable membrane, located above the luminous body and having a plurality of perforated holes; 其中，该光线经该半透膜的该破孔向上导出，或通过该半透膜的反射再经由该导光板向上导出。Wherein, the light is guided upwards through the perforation of the semi-permeable film, or is guided upwards through the light guide plate after being reflected by the semi-permeable film. 9.如权利要求8所述的背光组件，其特征在于，还包含一反射板，位于该导光板的下方以将该光线反射回该导光板中。9. The backlight assembly as claimed in claim 8, further comprising a reflective plate located under the light guide plate to reflect the light back into the light guide plate. 10.如权利要求8所述的背光组件，其特征在于，还包含：10. The backlight assembly according to claim 8, further comprising: 一扩散板，位于该导光板组及该半透膜的上方；及a diffuser plate located above the light guide plate set and the semi-permeable film; and 一棱镜片，位于该扩散板的上方以修正该光线的方向并聚光。A prism sheet is located above the diffusion plate to correct the direction of the light and focus it.
CN 03244308 2003-04-21 2003-04-21 Backlight component Expired - Lifetime CN2613785Y (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100395623C (en) * 2005-06-10 2008-06-18 清华大学 Backlight module
CN102644886A (en) * 2005-08-27 2012-08-22 3M创新有限公司 Edge-lit backlight having light recycling cavity with concave transflector
CN103239213A (en) * 2013-05-14 2013-08-14 徐志强 Observation device for auxiliary observation of venipuncture
CN103239212A (en) * 2013-05-14 2013-08-14 徐志强 Vein observation device capable of reducing heat emitting of light emitting tube
CN103705211A (en) * 2013-05-14 2014-04-09 徐志强 Light-emitting component for venepuncture auxiliary observation device
US9563074B2 (en) 2013-11-28 2017-02-07 Hon Hai Precision Industry Co., Ltd. Backlight module
US9857518B2 (en) 2005-08-27 2018-01-02 3M Innovative Properties Company Direct-lit backlight having light recycling cavity with concave transflector

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100395623C (en) * 2005-06-10 2008-06-18 清华大学 Backlight module
CN102644886A (en) * 2005-08-27 2012-08-22 3M创新有限公司 Edge-lit backlight having light recycling cavity with concave transflector
US9857518B2 (en) 2005-08-27 2018-01-02 3M Innovative Properties Company Direct-lit backlight having light recycling cavity with concave transflector
CN103239213A (en) * 2013-05-14 2013-08-14 徐志强 Observation device for auxiliary observation of venipuncture
CN103239212A (en) * 2013-05-14 2013-08-14 徐志强 Vein observation device capable of reducing heat emitting of light emitting tube
CN103705211A (en) * 2013-05-14 2014-04-09 徐志强 Light-emitting component for venepuncture auxiliary observation device
CN103239212B (en) * 2013-05-14 2014-12-03 李娜 Vein observation device capable of reducing heat emitting of light emitting tube
CN103239213B (en) * 2013-05-14 2015-01-07 徐志强 Observation device for auxiliary observation of venipuncture
US9563074B2 (en) 2013-11-28 2017-02-07 Hon Hai Precision Industry Co., Ltd. Backlight module

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Expiration termination date: 20130421

Granted publication date: 20040428