Light leak preventive back light unit of light guide plate

A technology of backlight module and light guide plate, which is applied in the direction of light guide, flat/plate light guide, light guide of lighting system, etc., can solve the problems of edge brightness leakage of backlight module, reducing the average brightness of backlight module, and energy loss of light source, etc. To achieve the effect of reducing light leakage in the gap, reducing the overall thickness and reducing the loss of brightness

Pending Publication Date: 2018-04-06
合肥泰沃达智能装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Causes light leakage at the edge of the backlight module, energy loss of the light source, and reduces the average brightness of the backlight module

Method used

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  • Light leak preventive back light unit of light guide plate
  • Light leak preventive back light unit of light guide plate
  • Light leak preventive back light unit of light guide plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 2 As shown, this embodiment provides a backlight module for a light-leakage-proof light guide plate, including a bracket 1, a light source 2, a reflective paper 3, a light guide plate 4, and a diffusion plate 5;

[0028] Described support 1 comprises support short side 11, support long side 12, and support long side 12 left top vertically is provided with support short side 11; Described support short side 11 left side is equipped with light source 2; Described support long side 12 A reflective paper 3 is installed on the upper surface, a light guide plate 4 is placed above the reflective paper 3, a dot 41 is arranged on the lower surface of the light guide plate 4, and a diffusion plate 5 is installed on the upper surface of the antifouling light guide plate 4; the left side of the light guide plate 4 is set There is a semi-elliptical convex lens 42, the lens 42 is in contact with the light source 2, and the bottom of the light guide plate 4 is provided...

Embodiment 2

[0033] Such as image 3 As shown, this embodiment provides a backlight module for a light-leakage-proof light guide plate, including a bracket 1, a light source 2, a reflective paper 3, a light guide plate 4, and a diffusion plate 5;

[0034] The main difference between this embodiment and Embodiment 1 is that the lens 42 provided on the left side of the light guide plate 4 is a rectangular protrusion, and a rectangular groove 421 corresponding to the light source 2 is provided on the left side of the rectangular protrusion;

[0035] working principle:

[0036] The left side of the lens 42 is provided with a rectangular groove 421, which covers the light source 2 inside; the light emitted by the light source 2 enters the lens 42 through the light emitting surface on the right side of the light source 2, effectively reducing the light passing through the light guide plate 4 and The diffusion plate 5 projects the backlight module from above.

Embodiment 3

[0038] Such as Figure 4 As shown, this embodiment provides a backlight module for a light-leakage-proof light guide plate, including a bracket 1, a light source 2, a reflective paper 3, a light guide plate 4, and a diffusion plate 5;

[0039] The main difference between this embodiment and Embodiment 1 is that the lens 42 arranged on the left side of the light guide plate 4 is a rectangular protrusion, and a tapered groove corresponding to the light source 2 is arranged on the left side of the protrusion, and is arranged on the right side of the tapered groove 431 A tapered cavity 432 in the direction of the tapered groove 431;

[0040] working principle:

[0041] The left side of the lens 42 is provided with a tapered groove 431 corresponding to the light source 2, and the light source 2 is covered inside; The light is refracted on the left side of the tapered cavity 432 to evenly disperse the light and reduce light leakage from the side edge of the light guide plate 4 . ...

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Abstract

The invention discloses a light leak preventive back light unit of a light guide plate. The back light unit comprises an L-shaped support, a light source, reflection paper, the light guide plate and adiffuser plate; the short side of the support is vertical to the long side, the light source is attached to the right side of the short side of the support, the reflection paper is disposed in the upper surface of the long side, the light guide plate is arranged on the reflection paper, and the diffuser plate is arranged on the light guide plate; and a lens is arranged in the left side of the light guide plate, and the bottom of the light guide plate is provided with lattice points. The back light unit is thin, light leak preventive and highlight. According to the invention, the lens is additionally arranged in the left side of the light guide plate, so that the light source emits diffused light, the diffused light is gathered in the light guide plate via the lens thereof, light leak in agap between the light source and the light guide plate is reduced effectively, and brightness loss is reduced; and at the same time, the total thickness of the light guide plate is reduced on the basis that the lens of the light guide plate is not changed, and the back light unit is thinner.

Description

technical field [0001] The invention relates to a backlight module of a light-leakage-proof light guide plate, in particular to a backlight module with a light-leakage-proof light-guide plate that is light and thin, light-leakage-proof, and bright. Background technique [0002] Since information products are all developing towards light, thin, short, and small targets, the concept of thinning has become the direction of continuous efforts of display devices. Due to the thinning trend, the thickness of the display device is also limited, and one of the key factors for the thinning of the display device is the thickness of the backlight module. [0003] In recent years, in the display industry, backlight modules (BLU: Back Light Unit) are divided into direct type and side type. The direct-type backlight module makes the light source located directly behind the screen emit to the LCD panel; the side-type backlight module is located at the edge of the screen, so that the light ...

Claims

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Application Information

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IPC IPC(8): G02B6/00G02F1/13357
CPCG02F1/133615G02B6/003
Inventor 周鑫伟袁伟钱成程
Owner 合肥泰沃达智能装备有限公司
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