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Prism sheet and backlight unit including same

A prism sheet, prism technology, applied in prisms, optical components, optics, etc., can solve problems such as reducing product appearance and brightness, product defects, etc.

Inactive Publication Date: 2013-07-03
CHEIL IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scratches will reduce the appearance and brightness of the product, thereby causing product defects

Method used

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  • Prism sheet and backlight unit including same
  • Prism sheet and backlight unit including same
  • Prism sheet and backlight unit including same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0077] A prism sheet including a base film and optical refraction segments formed on the base film is fabricated. The optical refraction section includes a first prism part (A1) with 19 prisms and a second prism part (A2) with a single prism, the first prism part (A1) and the second prism part (A2) according to A1A1... The sequence of A2...A1A1 is arranged. The prisms of the first prism section had a triangular cross-section, a height of 25 μm, and a pitch of 50 μm. The prisms of the second prism section had a triangular cross-section, a height of 23-27 μm, a maximum height of 27 μm, and a pitch of 50 μm. A line connecting the heights of the prisms of the second prism portion has a waveform.

example 2

[0079] A prism sheet including a base film and optical refraction segments formed on the base film is fabricated. The optical refraction section includes a first prism part (A1) with 10 prisms and a second prism part (A2) with a single prism, the first prism part (A1) and the second prism part (A2) according to A1A1... The sequence of A2...A1A1 is arranged. The prisms of the first prism section had a triangular cross-section, a height of 25 μm, and a pitch of 50 μm. The prisms of the second prism section had a triangular cross-section, a height of 31-35 μm, a maximum height of 35 μm, and a pitch of 66 μm. A height difference between the prisms of the first prism part and the prisms of the second prism part is 6-10 μm. A line connecting the heights of the prisms of the second prism portion has a waveform.

example 3

[0081] A prism sheet including a base film and optical refraction segments formed on the base film is fabricated. The optical refraction section includes a first prism part (A1) with 19 prisms and a second prism part (A2) with a single prism, the first prism part (A1) and the second prism part (A2) according to A1A1... The sequence of A2...A1A1 is arranged. The prisms of the first prism section had a triangular cross-section, a height of 25 μm, and a pitch of 50 μm. The prisms of the second prism section had a triangular cross-section, a height of 31-35 μm, a maximum height of 35 μm, and a pitch of 66 μm. The second prism has a radius of curvature of 2 μm. A height difference between the prisms of the first prism part and the prisms of the second prism part is 6-10 μm. A line connecting the heights of the prisms of the second prism portion has a waveform.

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Abstract

The invention provides a prism sheet and a backlight unit including the same. The prism sheet includes a base film having one flat surface and an optical refractive section having a plurality of prisms arranged along a first direction to constitute first and second prism parts. The optical refractive section is integrally formed with another surface of the base film that is opposite to the flat surface of the base film, and each of the prisms has a predetermined cross-sectional shape. The first prism part includes a first prism of the plurality of prisms, which first prism has a constant height along a second direction that intersects the first direction. The second prism part includes a second prism of the plurality of prisms, which second prism has a variable height in the second direction, and a maximum value of the variable height of the second prism is higher than the constant height of the first prism. The prism sheet can minimize reduction of brightness, improve scratch resistance and eliminating a protection film on an optical sheet, thereby reducing manufacturing cost.

Description

technical field [0001] The invention relates to a prism sheet, a backlight unit including the prism sheet, and an optical display device including the backlight unit. More specifically, the present invention relates to a prism sheet capable of minimizing reduction in brightness, improving scratch resistance, and eliminating optical damage, a backlight unit including the prism sheet, and an optical display device including the backlight unit. On-chip protective film to reduce manufacturing cost. Background technique [0002] Currently, liquid crystal displays (LCDs) are among the most widely used flat panel displays. The LCD has a structure in which a liquid crystal layer is encapsulated between a thin film transistor (TFT) array substrate and a color filter substrate. LCDs display images by rearranging liquid crystal molecules in a liquid crystal layer when a voltage is applied to electrodes on an array substrate and a color filter substrate. [0003] Since the LCD itself...

Claims

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Application Information

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IPC IPC(8): F21V5/02F21S8/00G02B5/04G02F1/13357
CPCG02B5/045G02F1/133607G02B5/02G02B5/04G02F1/1335G09F13/04
Inventor 崔美贞朴庆坤李秀敬
Owner CHEIL IND INC
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