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Liquid crystal display with wide color gamut and color temperature adjustment method thereof

A liquid crystal display and color gamut technology, applied in static indicators, instruments, nonlinear optics, etc., can solve problems such as high cost, small color gamut width, and reduced screen brightness, and achieve low-cost effects

Inactive Publication Date: 2017-04-26
马跃
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is that the quantum dot film used in the current technology has a high cost of use, a small color gamut width, and the screen brightness is reduced at the same time.

Method used

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  • Liquid crystal display with wide color gamut and color temperature adjustment method thereof
  • Liquid crystal display with wide color gamut and color temperature adjustment method thereof
  • Liquid crystal display with wide color gamut and color temperature adjustment method thereof

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Effect test

Embodiment 1

[0056] The color gamut of the liquid crystal display of the present invention can be increased to 100% of the NTSC standard. In fact, from some experiments we have done, the color gamut can exceed the NTSC standard.

[0057] Compared to using quantum dot enhanced film (QDEF) to improve the color spectrum of the backlight, the color spectrum is significantly better in the region of 570 to 620 nanometers, as a result, the LCD of the present invention should have a better color spectrum than the LCD using QDEF. color gamut.

[0058] Such as Figure 5 As shown, the transmittance spectrum of the color filter of the existing liquid crystal display and the color spectrum of the light emitted by the existing red light emitting diode 6 , green light emitting diode 5 and blue light emitting diode 7 on the market. Comparing the color spectrum of light emitted from a white LED, the green and red spectra have a rather narrow wavelength range. In addition, the wavelength at the highest po...

Embodiment 2

[0069] Using the liquid crystal display of the present invention, the color temperature of "white" displayed on the screen can be adjusted by changing the maximum brightness of the red light emitting diode 6, green light emitting diode 5 and blue light emitting diode 7 in the backlight. For example, if the color temperature needs to be adjusted to around 6500K, lower the maximum brightness of the light emitted by the red LED, so that the light emitted from the backlight has more green light and blue light, so the color temperature of white on the screen rises to around 6500K. At the same time, the gray levels of all red, green and blue sub-pixels still maintain 256 gray levels. As a result, the color temperature adjustment of the LCD monitor will not affect the quality of the image displayed on the screen.

[0070]After the color temperature is adjusted, if the screen brightness of the liquid crystal display needs to be reduced, the dimming signals sent to the red light emittin...

Embodiment 3

[0076] For some LCD applications (such as advertising, playing games, etc.), the displayed colors can be sequenced to create special attractions that can attract users. In current display devices, this can be achieved by using some specially-made video content. , this method is similar to the method of special effects generally used in movies, however, the production of a special video content requires professional skills and may also take a long time to complete, so the cost will be quite high. As a result, only the main Advertisements or popular applications can achieve these special color effects.

[0077] Using this invented LCD, it is very easy to create some special color effects by changing the color of the backlight, which is by using 3 different dimming input signals to control the backlight's red light emitting diode 6, green light emitting Diode 5 and blue light emitting diode 7 to complete the brightness.

[0078] The dimming signal can be provided from a small de...

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Abstract

The present invention relates to a liquid crystal display with a wide color gamut and a color temperature adjustment method thereof. According to the display, a backlight module set is arranged at the back surface of a liquid crystal display panel; a backlight driver drives the backlight module set; the backlight module set comprises a light guide plate, a light emitting diode lamp bar and a reflection film surrounding the light emitting diode lamp bar, wherein the reflection film surrounds a part of the light guide plate; the light emitting diode lamp bar is located at the right end of the backlight module set; an optical thin film is located in front of the light guide plate; the reflection film is located behind the light guide plate; and the light emitting diode lamp bar includes parallel red-light, green-light and blue-light emitting diodes. According to the color temperature adjustment method, the brightness of the red-light emitting diodes, the green-light emitting diodes and the blue-light emitting diodes in the backlight is changed, so that color temperature on the screen of the liquid crystal display can be changed. With the liquid crystal display with wide color gamut and the color temperature adjustment method thereof of the invention, the color gamut adjustment level of the liquid crystal display and the color temperature adjustment level of the liquid crystal display can be improved, cost can be decreased, and many different colors can be obtained.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to a liquid crystal display with a wide color gamut and a color temperature adjustment method thereof. Background technique [0002] In 1931, the CIE (International Commission on Illumination) set out a method to describe the human visual perception of light. It uses Y (illuminance), and x,y (chromaticity) to describe the brightness and color of light. For example, in describing chromaticity, the chromaticity value of white is close to (x, y) = (0.333, 0.333), for red, the x value is close to 0.6, and for green, the y value is close to 0.5. For blue, both x and y have values ​​around 0.15, which is known as the CIE1931 color space. [0003] Then in 1953, NTSC (National Television System Committee) released a standard for the red, green, and blue primary colors displayed on color TVs, which is the so-called NTSC color gamut standard. Using the CIE1931 color space, the chroma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G09G3/34G09G3/36
CPCG02F1/133615G09G3/3413G09G3/36
Inventor 马跃
Owner 马跃