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A kind of non-diffraction brightening prism sheet and display screen

A prism sheet, non-diffraction technology, applied in prisms, instruments, optics, etc., can solve the problems affecting the effect of display dimming and adjusting the light angle, etc., to reduce the difficulty of dimming, reduce mutual extrusion and friction damage, Guaranteed consistent effect

Active Publication Date: 2022-07-01
安徽晟华光学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned scheme can reduce diffraction to a certain extent, no matter it is curved or staggered, the angle between the prisms at different positions varies greatly, resulting in differences in the effect of adjusting the light angle at different positions. Affects the dimming of the entire display in the later stage

Method used

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  • A kind of non-diffraction brightening prism sheet and display screen
  • A kind of non-diffraction brightening prism sheet and display screen
  • A kind of non-diffraction brightening prism sheet and display screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like Figure 3-4 As shown, a non-diffraction brightness enhancement prism sheet, the prism sheet includes a lower bottom 1 and an upper end 2, the lower bottom 1 is a flat plate, the upper end 2 is located on the upper surface of the lower bottom 1, and is integrally formed with the lower bottom 1 The upper end 2 includes a plurality of elongated convex prisms with a triangular cross-section, so that part of the light propagating upward from the lower bottom 1 is refracted through the prism sheet and emitted from the upper end 2, and a part is totally reflected by the prism from the bottom Bottom 1 shot;

[0030] And the extension directions of the tips of all the prisms of the upper end 2 are all parallel to each other, and the length along the extension direction of the tips of the prisms is defined as the length of the prism. width, the ratio of the length to the width of the prism is 2 to 5:1;

[0031] After extending a prism length along the extension direction o...

Embodiment 2

[0035] like Figure 5 As shown, a method for manufacturing a diffraction-free brightness-enhancing prism sheet is provided, including:

[0036] Step 1, providing a substrate film, the substrate is at least one of polystyrene resin, acrylic resin, polycarbonate resin, or styrene methyl methacrylate resin;

[0037] Step 2, provide a roller 3, the surface of the roller 3 is provided with a shape 4 complementary to the surface structure of the prism sheet, so that when the roller 3 rolls on the surface of the substrate film, a column of prisms can be formed on the surface of the substrate film, and the roller The barrel 3 is a hollow structure, and low-temperature liquid can be injected into it;

[0038] Step 3, heating the substrate film to a predetermined temperature to soften the substrate;

[0039] Step 4, inject low-temperature liquid into the roller 3, and then roll the roller 3 on the surface of the substrate film once, so that a column of prisms is formed on the surface ...

Embodiment 3

[0042] provide a diffraction-free display such as figure 2 As shown, the display screen has the non-diffraction brightening prism sheet;

[0043] The display has two layers of non-diffractive brightness-enhancing prism sheets arranged perpendicular to each other, and the display also includes:

[0044]Liquid crystal cell, diffuser plate, light guide plate and backlight source; the display screen is provided with liquid crystal cell, first prism sheet, second prism sheet, diffuser plate, light guide plate and backlight source in order from top to bottom.

[0045] The upper end portion 2 of the prism sheet is provided with a hard protective film layer during assembly, and there is no relative displacement between the prism sheet and the hard protective film layer.

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Abstract

The invention relates to a non-diffraction brightening prism sheet and a display screen. The prism sheet makes the position of the prisms along its extension direction change continuously, and sets the mutual prime between the parameters to greatly reduce the probability of diffraction after assembling into a display; in addition, the directions of the prisms are all parallel , which ensures the consistency of the light adjustment angle and reduces the difficulty of dimming the display in the later stage; because the existing scribing method is difficult to manufacture the prism sheet structure of the present invention, an innovative pressing method is used to prepare the prism sheet, and the roller is filled with cold water during production. , so that the pressed area can be cooled and formed during the pressing process, and the temperature of the unpressed position can be maintained, so as to realize the manufacture of the prism sheet. A hard protective film is also arranged on the top of the prism sheet when assembling the display screen, which reduces mutual extrusion and friction damage during assembly.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to a non-diffraction brightening prism sheet. Background technique [0002] Prism Sheet, also called Brightness Enhancement Film (BEF), is an important component of liquid crystal displays. It mainly uses the law of total reflection and refraction to concentrate the scattered light in a certain angle range, so as to improve the brightness in this range. The early prism sheets have multiple parallel prisms, but due to the formation of a certain diffraction between the prisms and the liquid crystal pixels, the later prism sheets all use special-shaped prism sheets, such as figure 1 like figure 1 The spiral prism sheet shown. Such prism sheets are generally formed by scribing on the surface of the material with a scribing device. [0003] For example, application number: CN200710201803.3, which discloses including a backlight module and a liquid crystal panel arranged above t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357G02B5/04
CPCG02F1/133606G02B5/045
Inventor 崔治权
Owner 安徽晟华光学科技有限公司
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