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Prism piece and backlight mould

A technology of backlight module and prism sheet, applied in prisms, optics, electric light sources, etc., can solve the problem of inconspicuous display effect, and achieve the effect of improving light condensing effect, improving performance index and preventing moire pattern.

Active Publication Date: 2012-09-05
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this kind of LCD backlight, the brightness of the central area of ​​the display is not much different from that of the surrounding area, and the viewer sitting directly in front of the display does not feel the display effect clearly
Moreover, different viewers have different requirements for enhancing the brightness of local areas of the display, and none of the existing LCD backlight sources can meet the above requirements.

Method used

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  • Prism piece and backlight mould
  • Prism piece and backlight mould
  • Prism piece and backlight mould

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment introduces the structure of the prism sheet for the purpose of being used for the backlight source of the flat panel display. figure 1 A schematic structural view of the prism sheet of this embodiment is shown, figure 2 is its side view. The prism sheet includes a main body 1 and a plurality of prisms 2 on the main body 1 . The upper surface of the main body 1 is rectangular and has a symmetry axis (not shown in the figure), which divides the upper surface of the main body 1 into a first area A and a second area B which are symmetrical to each other. The prisms 2 and the prisms 2 of the second region B are mutually symmetrical about the axis of symmetry. The prism 2 in the present embodiment preferably has a triangular cross section, the bottom surface of the prism 2 is connected to the upper surface of the main body 1, and the remaining two sides are respectively marked as the first side 3 and the second side 4, on the first area A , the first side ...

Embodiment 2

[0044] image 3Shown is the top view of the prism sheet of this embodiment. The prism sheet of this embodiment also includes a main body 1 and a prism 2 positioned on the main body 1. The difference from Embodiment 1 is that the prism 2 of this embodiment is frame-shaped Each frame of the frame-shaped prism is parallel to each edge of the main body 1 respectively, that is, the shape of the frame-shaped prism is similar to that of the main body 1 . In order to adapt to the rectangular shape of the flat panel display, the frame shapes of the main body 1 and the prism 2 are both rectangular, and a plurality of prisms 2 are nested on the upper surface of the main body 1 to form a nested "back" structure.

[0045] In this embodiment, the arrangement structure of the different sides of each prism 2 is similar to Embodiment 1, as Figure 5 shown. In the "back"-shaped prism structure, the prism 2 in the center of the main body 1 can be replaced by a strip prism with a triangular cro...

Embodiment 3

[0048] This embodiment provides a backlight module, which has the prism sheet in Embodiment 1 or Embodiment 2.

[0049] In this embodiment, the prism sheet is connected with the light guide plate, and the prism unit is arranged on the light guide plate, so that the prism on the prism sheet can be engaged with the prism unit on the light guide plate. After the prism sheet is connected with the light guide plate, the surface of the main body of the prism sheet Parallel to the surface of the light guide plate, not only can avoid the scratch of the prism sheet, but also facilitate the assembly of the device.

[0050] It can be seen from the above embodiments that the embodiment of the present invention sets the inclined structure of the prism, which can improve the light-gathering effect of the prism sheet in a local area, and can improve the overall performance index of the backlight by applying it to the backlight of a flat panel display. , so as to improve the brightness of the...

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Abstract

The invention discloses a prism piece which comprises a main body part and multiple prisms positioned on the main body part, wherein the upper surface of the main body part is provided with a symmetrical shaft, the main body part is divided into a first region and a second region which are mutually symmetrical, and the prisms on the two regions are symmetrical relative to the symmetrical shaft; in the first region, each prism comprises a first side face approaching to the edge which is parallel to the symmetrical shaft in the first region and a second side face far from the edge; and in a section from the edge to the interior of the first region, an included angle formed by the first side face and the upper surface of the main body part is gradually increased. The prisms provided by the invention are arranged in an inclined structure, so that the spotlight effect of the prism piece at a center watching position region is improved; after the prism piece is applied to a backlight source, the whole performance index of the backlight source is improved, and thus, the brightness of a display on the center watching position is improved; an irregular structure of each prism is arranged, so that generation of Mohr grain; and a light guide plate is combined with an inverse edge eyeglass, and the surface of each prism is a horizontal plane, so that the abrasion of the prism piece is effectively prevented, and the assembly is convenient.

Description

technical field [0001] The invention relates to the field of liquid crystal display backlight sources, in particular to a prism sheet and a backlight module. Background technique [0002] In flat panel displays, liquid crystals are devices that do not emit light themselves. It uses a backlight to display light. The backlight is mainly divided into side-type backlight and direct-type backlight. Taking the side-type backlight as an example, it includes: a molded frame with a fixed effect; installed on the bottom surface to reflect light to the liquid crystal display A reflective sheet of the plate; a light guide plate arranged on the reflective sheet for guiding light; a light source arranged between the light guide plate and the side wall of the receiving space for emitting light; a diffuser sheet arranged on the light guide plate for uniform light; A prism sheet placed on the diffusion sheet for converging light; a protective sheet for protecting the diffusion sheet and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/04F21V5/02F21S8/00G02F1/13357
Inventor 唐蓉邵喜斌
Owner BOE TECH GRP CO LTD
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