Back light for display device

A backlight unit and display technology, applied in optical components, instruments, optics, etc., can solve problems such as uneven brightness, low brightness, and non-luminous electrodes, and achieve the effect of solving uneven brightness

Inactive Publication Date: 2005-11-16
WOOYOUNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] First, the electrode is located at the end of the light source, and the electrode does not emit light. Therefore, the brightness of the area close to the electrode is less than that of other areas, resulting in uneven brightness distribution in the length direction of the light source.
[0008] Second, when the light source is close, the brightness increases, and when the light source is far away, the brightness decreases, so the direction of light guidance will produce uneven brightness, such as bright lines

Method used

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Embodiment

[0035] Embodiments of the present invention are now described. Similar parts described in the above embodiments will not be repeated.

[0036] According to this embodiment, the density of the grooves 111 in the prism pattern, in the length direction of the light source 200 , increases continuously along the direction approaching the electrodes 211 and 212 of the light source 200 .

[0037] In this case, due to the reduced pitch of the grooves 111, in the regions S1 and S2 adjacent to the electrodes 211 and 121, the light refracted by the pattern forming unit 110 is relatively more than other regions. Accordingly, the amount of light refracted out of the light guide panel 100 at an angle greater than total reflection increases. That is to say, the problem of uneven brightness in the length direction of the light source 200 is solved.

[0038] Also, by continuously increasing the density of the grooves 111 in the prism pattern in the pattern forming unit 110 away from the ligh...

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PUM

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Abstract

Provided is a backlight unit for a display device. The backlight unit includes a transparent light guide panel having a lower surface with a pattern forming unit in which a prism pattern is formed as grooves, a light source disposed on a side of the light guide panel, a reflection plate disposed under the light guide panel, wherein depths and/or a density of the grooves in the prism pattern consecutively increase close to electrodes of the light source in a length direction of the light source.

Description

technical field [0001] The present invention relates to a display backlight unit, and more particularly, to a display backlight unit that improves a prism pattern of a light guide panel by eliminating non-uniformity of display luminance. Background technique [0002] In general, flat panel display panels can be classified into light emitting types such as cathode ray tubes (CRT), electroluminescence, and plasma display panels, and light receiving types such as liquid crystal displays (LCDs). [0003] The LCD displays images not by generating light itself, but by receiving light from the outside. Therefore, in order for the display to work properly, the LCD must have an additional light source, such as a backlight unit. [0004] The backlight unit of the LCD can be classified into a direct reflection type and an edge type according to the position of a light source. The edge type is suitable for a display that needs to be small and light. However, in the edge type backligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357F21V8/00
CPCG02B6/0038G02B6/0061B01D46/0041B01D46/48
Inventor 朴基渐金大岘孔成铉
Owner WOOYOUNG
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