Color enhancement film used for color display device, and preparation method thereof

A technology of color display and color enhancement film, applied in optics, instruments, nonlinear optics, etc., can solve the problems of not much room for improvement, increased complexity of circuit control, high cost of backlight, etc., to increase thickness and weight, and increase purity , the effect of expanding the color gamut

Active Publication Date: 2016-09-28
武汉华彩光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are studies using tri-color LEDs as the backlight, and its theoretical color gamut can reach 115% NTSC, but the cost of this kind of backlight is very high, and the complexity of circuit control is greatly increased, making it difficult to popularize. , there is not much room for improvement now

Method used

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  • Color enhancement film used for color display device, and preparation method thereof
  • Color enhancement film used for color display device, and preparation method thereof
  • Color enhancement film used for color display device, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Example 1: Figure 5 A schematic structural diagram of the color enhancing film of Embodiment 1 of the present invention is shown. On one side of the PET base film, a layer of color-increasing coating is coated according to the above-mentioned method, and the color-increasing coating includes a matrix 502 and a light conversion material 503.

[0080] In this embodiment, the thickness of the PET base film is 75 microns; the thickness of the color-enhancing coating is 100 microns. The light wavelength conversion material in the color enhancement coating is uniformly and discretely distributed in the polymer resin, and is used to convert at least part of the light within the first predetermined wavelength range into light within the second predetermined wavelength range. The mass ratio of the light wavelength conversion material to the polymer resin is 1:10 to 1:10000.

[0081] In this embodiment, an organic molecular fluorescent dye Sulforhodamine101 is used as the ligh...

Embodiment 2

[0085] In this embodiment, the inventors of the present application improved Embodiment 1. The polymer resin and optical wavelength conversion material used in this embodiment are similar to those in Embodiment 1, and will not be repeated here.

[0086] Specifically, the inventor noticed that the color-enhancing coating is coated on one side of the PET base film, and the coating will shrink to a certain extent during curing, and the specific shrinkage ratio depends on the selected raw materials and proportions of the coating. When the coating is cured and shrinks, stress along the direction of the film will be generated. When this stress is greatly different from the stress of the PET base film itself along the film direction, the film as a whole will warp to the side with greater stress. This warping will be more obvious when the PET base film is thinner, mainly because the thinner PET has lower stiffness and is difficult to resist this stress difference.

[0087] In order t...

Embodiment 3

[0090] In this embodiment, the inventors of the present application further improved the color enhancing film of Embodiment 2.

[0091] Specifically, the inventor considers that in an actual backlight module, each optical film has a certain thickness, and adding an additional optical film will increase the thickness and weight. Therefore, the inventor hopes to provide the function of expanding the color gamut without increasing or increasing the thickness of the optical film, which is more ideal.

[0092] At present, there is an optical film or coating that must be used in liquid crystal displays, that is, a light-diffusing film or coating. In order not to increase the number of optical films in the backlight, in this embodiment, a color enhancement film with composite functions is designed, which simultaneously has the functions of color enhancement and light diffusion. Thereby directly replacing a diffuser film that must be used in the backlight module, avoiding additional ...

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Abstract

The invention relates to a color enhancement film used for a color display device, and a preparation method thereof. The color enhancement film comprises a transparent basal membrane and a color enhancement coating coating the transparent basal membrane, wherein an optical wavelength conversion material is dispersively distributed in the color enhancement coating. The optical wavelength conversion material can at least partially convert light in a first predetermined wavelength scope into light in a second predetermined wavelength scope so as to improve color purity of three primary colors, i.e., red, green and blue, in a display backlight source, broaden the display color range and enhance color trueness of a display. The color enhancement film does not severely reduce the brightness of the display while substantially improving the color range of the display to 110% before use. At the same time, the color enhancement film can be functionally compounded with existing functional optical films in a display luminescence module, the functions include a light scattering function, a brightness enhancement function and an eye protection function, and therefore, increases of the total quantity and the total thickness of the optical films in the luminescence module are prevented.

Description

technical field [0001] The invention relates to the field of color display, in particular to a color enhancement film for improving the color performance of a color display device and increasing the color gamut. Background technique [0002] Flat-panel display technology emerged after the 1960s. After more than 40 years of development, especially in recent years, with the wide application of displays such as TVs, mobile computers, tablets, and smart phones, the scale of the flat-panel display industry has increased dramatically. Together with the large-scale integrated circuit industry and the software industry, it has become the three pillar industries in the information industry. [0003] In the flat panel display market, liquid crystal displays (Liquid Crystal Display, LCD) occupy a dominant position, and it has advantages such as low energy consumption, long service life, and space saving. At the same time, a display technology based on Organic Light Emitting Display (O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02F1/13357
CPCG02B1/10G02F1/133606G02F1/133611
Inventor 明天肖蔓达徐荣刘纪宏肖慧
Owner 武汉华彩光电有限公司
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