LCD device, backlight module unit and control method of backlight module unit

Abstract

The invention discloses a liquid display, a backlight module and a control method used for the backlight module, wherein, the backlight module is provided with a first luminous element and a second lumination element with different colour systems; the first luminous element is provided with a first luminous period; the second luminous element is provided with a second luminous period; the control method of the invention comprises the steps as follows: the luminous intensity of the first luminous element is sensed by at least twice so as to obtain at least two first sensing signals; the luminous intensity of the second luminous element is sensed by at least twice so as to obtain at least two second sensing signals; according to the first sensing signal and the second sensing signal, and the luminous intensity of the first luminous element and the second luminous element are respectively controlled or compensated according to the first sensing signal and the second sensing signal. The liquid crystal display device, the backlight module and the control method of the backlight module can save the cost and the usage space of the circuit, and effectively control or compensate the suitable luminous intensity of the luminous element.

Description

technical field [0001] The present invention relates to a display device, a backlight module, and a method for controlling the backlight module, in particular to a liquid crystal display device, a backlight module, and a backlight module capable of controlling or compensating for the chromaticity and luminance of the backlight module. Control Method. Background technique [0002] With the advent of the digital age, the technology of liquid crystal display devices has grown rapidly and has become an indispensable electronic product. Therefore, the requirements for the technology and functions of liquid crystal display devices are also getting higher and higher. [0003] Such as figure 1 As shown, a conventional liquid crystal display device 1 includes a liquid crystal display panel 2 (Liquid Crystal Display Panel) and a backlight module 3 (Back lightModule). Wherein, the liquid crystal display panel 2 mainly has two substrates and a liquid crystal layer (not shown) sandwich...

AI Technical Summary

Problems solved by technology

However, there will be ambient light in the backlight module 3 at the same time, and when the photosensitive element 321, 322 or 323 senses, it is easily disturbed by the noise of the ambient light, so it not only causes the sensing signal to be distorted, but also makes the controlled or compensated There is an error in the luminous intensity

[0005] In addition, since the liquid crystal display device 1 needs to use photosensitive elements 321, 322, and 323 of different colors for the light-emitting diodes D01, D02, and D03 of different colors, it will cause an increase in cost, and will increase the use of space and circuit wiring.

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