JP3114467U

JP3114467U - Light guide structure of direct type backlight module

Info

Publication number: JP3114467U
Application number: JP2005005307U
Authority: JP
Inventors: 曾文保
Original assignee: 科橋電子股▲ふん▼有限公司
Priority date: 2005-07-07
Filing date: 2005-07-07
Publication date: 2005-10-27
Anticipated expiration: 2015-07-07

Abstract

【課題】光源からの光線を有効に分配して暗区を消去する直下型バックライトモジュールのライトガイド構造を提供する。
【解決手段】直下型バックライトモジュールのライトガイド構造は、内から外に向かって反射カバー１０、複数の光源２０、拡散板３０、数枚の光学膜片４０及び液晶面板５０を順に設置する。そのうち、拡散板の入光面３１及び出光面上に複数個のライトガイド錐体３３を成形し、光源の光線が拡散板のライトガイド錐体を通過するように設置する。
【選択図】図３Provided is a light guide structure for a direct type backlight module that effectively distributes light rays from a light source and erases dark areas.
In a light guide structure of a direct type backlight module, a reflective cover, a plurality of light sources, a diffusion plate, several optical film pieces and a liquid crystal face plate are sequentially installed from the inside to the outside. Among them, a plurality of light guide cones 33 are formed on the light incident surface 31 and the light exit surface of the diffusion plate, and are installed so that the light rays of the light source pass through the light guide cones of the diffusion plate.
[Selection] Figure 3

Description

本考案は、直下型バックライトモジュールのライトガイド構造に関するもので、光源からの光線を有効に分配して暗区を消去するものである。 The present invention relates to a light guide structure of a direct type backlight module, and effectively distributes light rays from a light source to erase dark areas.

一般の電子装置である液晶モニターは、実際の要求に従い、直下型もしくは側面光源型モジュールのアーキテクチャーを選択する。図1に示すのは、直下型バックライトモジュールの基本構造指示図である。この構造は、内から外へ反射カバー10、複数の光源20、拡散板30、複数枚の光学膜片40及び液晶面板50の順に設置する。そのうち、各光源20は直線状もしくはＵ字型もしくはその他連続湾曲形状とし、適する間隔で反射カバー10と拡散板30の問に設置する。市場でよく見られる拡散板30と液晶面板50の間の数枚の光学膜片40は、1〜3枚の拡散片、0〜2枚の増光片、0〜1枚の反射式偏光偏等が相互に合わさって構成され、その作用は通過した光線を拡散する。これによって各光源の間隔部位では無光線区域が発生し、液晶モジュール上で明暗区現象が発生するのを改善する。 A liquid crystal monitor, which is a general electronic device, selects an architecture of a direct type or a side light source type module according to actual requirements. FIG. 1 shows a basic structure instruction diagram of a direct type backlight module. In this structure, the reflection cover 10, the plurality of light sources 20, the diffusion plate 30, the plurality of optical film pieces 40, and the liquid crystal face plate 50 are installed in this order from the inside to the outside. Among them, each light source 20 has a linear shape, a U-shape, or other continuous curved shape, and is installed between the reflection cover 10 and the diffusion plate 30 at an appropriate interval. Several optical film pieces 40 between the diffusing plate 30 and the liquid crystal face plate 50 often found in the market are 1 to 3 diffusing pieces, 0 to 2 brightening pieces, 0 to 1 reflective polarization polarization etc. Are combined with each other, and the action diffuses the light rays that pass through. As a result, a light-free area is generated at the interval between the light sources, thereby improving the occurrence of the light-dark area phenomenon on the liquid crystal module.

しかし、拡散板30の作用だけでは通過した光線が均一に放出され、液晶モジュール上の明暗区を改善するのに限界がある。そのため、一部のバックライトモジュールでは、故意に光源20と拡散板30の間隔を広げ、光源20が拡散板30に入る範囲を広げて暗区の形成を縮小している。しかし、この構造でも効果が良好ではなく、その上バックライトモジュールの厚みが増すため、今日の液晶モジュールの薄型化に逆行する。 However, only the action of the diffusing plate 30 causes the light rays that have passed through to be emitted uniformly, and there is a limit to improving the bright and dark areas on the liquid crystal module. For this reason, in some backlight modules, the space between the light source 20 and the diffusion plate 30 is intentionally widened, and the range in which the light source 20 enters the diffusion plate 30 is widened to reduce the formation of dark areas. However, this structure is not effective, and the thickness of the backlight module is increased, which goes against the thinning of today's liquid crystal modules.

解決しようとする問題点は、各光源の間隔部位では無光線部位が発生し、液晶モジュール上で明暗区の現象が発生する点であり、改善のため、光源と拡散板の間を広げると、液晶モジュール全体の厚みが増し、薄型化の流れと逆行する点である。 The problem to be solved is that a light-free part occurs in the interval part of each light source, and the phenomenon of bright and dark areas occurs on the liquid crystal module. The overall thickness increases, which is a point that goes against the trend of thinning.

本考案は、内から外に向かって反射カバー、複数の光源、拡散板、数枚の光学膜片及び液晶面板を順に設置する。そのうち、拡散板の入光面及び出光面上に複数個のライトガイド錐体を成形し、光源の光線が拡散板のライトガイド錐体を通過するように設置する。通過した光線は少なくとも二回のライトガイド錐体の拡散を経るため、より有効に光源の光線を分配することを最も主要な特徴とする。 In the present invention, a reflection cover, a plurality of light sources, a diffusion plate, several optical film pieces, and a liquid crystal face plate are sequentially installed from the inside to the outside. Among them, a plurality of light guide cones are formed on the light incident surface and the light exit surface of the diffuser plate, and the light source rays are installed so as to pass through the light guide cones of the diffuser plate. Since the light rays that have passed through the light guide cone diffuse at least twice, the most important feature is to distribute the light rays of the light source more effectively.

本考案の直下型バックライトモジュールのライトガイド構造は、光源からの光線を有効に分配して暗区を消去するという利点がある。 The light guide structure of the direct type backlight module according to the present invention has an advantage in that the light from the light source is effectively distributed and the dark area is eliminated.

図2に示すとおり、直下型バックライトモジュールは内側から外側に向けて反射カバー10、複数の光源20、拡散板30、数枚の光学膜片40、液晶面板50が設置される。数枚の光学膜片40は、1〜3枚の拡散片、0〜2枚の増光片、0〜1枚の反射式偏光片等が合わさって構成される。そのうち、各光源20は直線状もしくはU字型もしくはその他連続湾曲形状のライト管で、適する間隔で反射カバー10と拡散板30の間に設置されるか、もしくは発光ダイオードを適する間隔で反射カバー10と拡散板30の間に設置する。図3に示すとおり、液晶モジュールの表示効果は、各光源20が放出する光線によって構成される。 As shown in FIG. 2, the direct type backlight module is provided with a reflective cover 10, a plurality of light sources 20, a diffusion plate 30, several optical film pieces 40, and a liquid crystal face plate 50 from the inside to the outside. The several optical film pieces 40 are configured by combining 1 to 3 diffusion pieces, 0 to 2 brightening pieces, 0 to 1 reflective polarizing pieces, and the like. Among them, each light source 20 is a linear, U-shaped or other continuously curved light tube, and is installed between the reflective cover 10 and the diffusion plate 30 at an appropriate interval, or a light emitting diode is disposed at an appropriate interval. And between the diffusion plate 30. As shown in FIG. 3, the display effect of the liquid crystal module is constituted by light rays emitted from each light source 20.

拡散板30は、入光面31と出光面32が設置され、その上に複数個のライトガイド多角錐体33が成形される。当実施例中、各ライトガイド錐体33の距離間隔は、１ｍｍより小さいか、もしくは同じである。そのため各光源20の光線が液晶面板50に入る前に、拡散板30のライトガイド錐体33の設置により、通過する光線は、少なくとも二回のライトガイド多角錐体33による拡散作用を受け、バックライトモジュールの輝度効果を高め、暗区の形成を防ぐ。 The diffuser plate 30 is provided with a light incident surface 31 and a light output surface 32, and a plurality of light guide polygonal pyramids 33 are formed thereon. In this embodiment, the distance between the light guide cones 33 is smaller than or equal to 1 mm. Therefore, before the light beam of each light source 20 enters the liquid crystal face plate 50, the light guide cone 33 of the diffuser plate 30 is installed so that the light beam passing through it is subjected to the diffusion action by the light guide polygonal pyramid 33 at least twice. Increases the brightness effect of the light module and prevents the formation of dark areas.

図3に示すとおり、各ライトガイド錐体33は、複数の突出構造で、当実施例中、各ライトガイド錐体33の高度は０．５ｍｍより小さいか、もしくは同じである。
または図4A、Bに示すのは、各ライトガイド錐体33の深さが０．５ｍｍか、もしくは同じである凹形状構造で、突出構造もしくは凹形状構造を一体で全体に配置する。または異なる曲面の結合によるライトガイド錐体でもよく、図5A、Bに示すとおり、曲面A及び曲面Bで構成されるライトガイド錐体33の配列は、図3から図5A、Bに示すとおり、非連続型で、図6A、Bに示すとおり、連続型の配列でも同じように光線の拡散作用を具える。 As shown in FIG. 3, each light guide cone 33 has a plurality of protruding structures. In this embodiment, the height of each light guide cone 33 is smaller than or equal to 0.5 mm.
4A and 4B show a concave structure in which each light guide cone 33 has a depth of 0.5 mm or the same, and the protruding structure or the concave structure is integrally arranged as a whole. Or it may be a light guide cone with a combination of different curved surfaces, as shown in FIGS. As shown in FIGS. 6A and 6B, the non-continuous type has the same light diffusing action as the continuous type arrangement.

公知の直下型バックライトモジュールの構造指示図である。It is a structure instruction | indication figure of a well-known direct type backlight module. 本考案の直下型バックライトモジュールのライトガイド溝槽応用配置図である。It is a light guide groove tank application layout view of the direct type backlight module of the present invention. 本考案の直下型バックライトモジュールの立体分解図である。It is a three-dimensional exploded view of a direct type backlight module of the present invention. Ａは本考案のライトガイドの別構造立体図、Ｂはその部分拡大図である。A is another structural solid view of the light guide of this invention, B is the elements on larger scale. Ａは本考案のライトガイドの更に別構造の立体図、Ｂはその部分拡大図である。A is a three-dimensional view of still another structure of the light guide of the present invention, and B is a partially enlarged view thereof. Ａは本考案のライトガイドのまた別の構造の立体図、Ｂはその部分拡大図である。A is a three-dimensional view of another structure of the light guide of the present invention, and B is a partially enlarged view thereof.

Explanation of symbols

10 反射カバー
20 光源
30 拡散板
31 入光面
32 出光面
33 ライトガイド錐体
40 光学膜片
50 液晶面板 10 Reflective cover
20 Light source
30 Diffuser
31 Incident surface
32 Light emitting surface
33 Light guide cone
40 Optical film pieces
50 LCD faceplate

Claims

In the light guide structure of the direct type backlight module, which is a backlight module in which a reflective cover, a plurality of light sources, a diffusion plate, several optical film pieces and a liquid crystal face plate are installed in order from the inside to the outside,
The diffuser plate is formed with a plurality of light guide cones on the light entrance surface and the light exit surface, and light rays from the light source are diffused at least twice by the light guide cones of the diffuser plate before entering the liquid crystal face plate. Therefore, the light guide structure of the direct type backlight module is characterized in that the light rays of the light source are effectively distributed.

2. The light guide of a direct type backlight module according to claim 1, wherein the light source is a light tube having a linear shape, a U-shape, or other continuously curved shape, and is installed between the reflection cover and the diffusion plate at an appropriate interval. Construction.

2. The light guide structure of a direct type backlight module according to claim 1, wherein the light source is disposed between the reflection cover and the diffusion plate at a suitable distance interval between the light emitting diodes.

2. The light guide structure of a direct type backlight module according to claim 1, wherein each of the light guide cones is integrally formed as a projecting structure of the portion.

2. The light guide structure of a direct type backlight module according to claim 1, wherein each of the light guide cones is integrally formed as a concave structure at this portion.

2. The light guide structure of a direct type bathoclite module according to claim 1, wherein each of the light guide cones is formed as a curved surface structure that is integrated and has different portions.

2. The light guide structure of a direct type backlight module according to claim 1, wherein the interval between the light guide cones is less than or equal to 1 mm.

5. The light guide structure of a direct type backlight module according to claim 4, wherein each light guide cone has a height smaller than or equal to 0.5 mm.

6. The light guide structure of a direct type backlight module according to claim 5, wherein each light guide cone has a depth smaller than or equal to 0.5 mm.