Liquid crystal display device and control method thereof

Abstract

A liquid crystal display device includes a backlight module and a liquid crystal display panel. The liquid crystal display panel is provided with a colorized light filter. The backlight module is provided with a lighting unit, a light sensing unit and an adjusting unit, wherein, the adjusting unit is respectively and electrically connected with the lighting unit and the light sensing unit; the optical characteristics of the light sensing unit corresponds to a first spectrum response, and the light sensing unit receives the rays generated by the lighting unit and filtrates rays according to the first spectrum response to generate a light intensity signal value; the adjusting unit generates an adjusting signal to adjust the lighting intensity of the lighting unit according to the light intensity signal value and a target light intensity signal value; the optical characteristics of the colorized light filter corresponds to a second spectrum response, and the colorized light filter filtrates rays according to the second spectrum response, wherein the first spectrum response and the second spectrum response are virtually the same.

Description

technical field [0001] The present invention relates to a plane display device and its control method, in particular to a liquid crystal display device and its control method. technical background [0002] With the development of display technology, flat panel display devices and their products have been widely used by people, and liquid crystal display devices have gradually replaced traditional cathode ray tube display devices due to their superior characteristics such as light and thin body, low power consumption and no radiation. And it is applied to many kinds of electronic products. [0003] Please refer to figure 1 As shown, the known liquid crystal display device 1 includes a backlight module 11 and a liquid crystal display panel 12 . The backlight module 11 has a control unit 111, a driving unit 112, a plurality of red, green and blue light emitting diodes 113 (hereinafter referred to as light emitting diodes) and a light mixing unit 114, wherein the driving unit ...

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Problems solved by technology

[0007] However, since the spectral response of the photo-sensing unit is different from the spectral response of the color filter 121, in other words, the spectral response of the photo-sensing unit and the gain value corresponding to each dominant wavelength in the spectral response of the color filter The variation is not the same, so the chromaticity deviation of the color picture is enlarged to about 8 thousandths

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