Control chip of color sequential LCD equipment

Abstract

The invention relates to a control chip of a color sequence type liquid crystal display device, wherein the control chip uses a transmission interface to receive an order and at least display data and uses a timing generator to produce a scan timing signal, a data timing signal and a driving timing signal, a scan driving circuit produces a scan signal to the color sequence type liquid crystal display device according to the scan timing signal, a data driving circuit receives the display data to produce a data signal to the color sequence type liquid crystal display device according to the data timing signal, and a light source driving circuit produces a plurality of driving signals to the color sequence type liquid crystal display device according to the driving timing signal and produces a plurality of color backlight sources. The color sequence type liquid crystal display device displays a picture frame according to the scan signal, the data signal and the backlight source, further the light source driving circuit can be integrated in the control chip, a power supply circuit can be further integrated in the control chip, the control chip does not need to externally connect with a power supply chip, thereby reducing the cost.

Description

technical field [0001] The invention relates to a control chip, in particular to a control chip of a color sequential liquid crystal display device. Background technique [0002] Nowadays, with the vigorous development of science and technology, the types of information products are introduced to meet the different needs of the public. Because Liquid Crystal Display (LCD) has the advantages of being thin and short, low radiation dose, and low power consumption, while traditional display devices are bulky, high power consumption, and high radiation dose, the displays on the market today are Devices will gradually be replaced by liquid crystal display devices for traditional display devices, and therefore liquid crystal display devices have become the mainstream of the current display device market. However, traditional liquid crystal display devices use color filters to filter light sources, so that a single pixel can simultaneously display components of three primary colors...

AI Technical Summary

Problems solved by technology

Generally speaking, the microcontroller 16 must control the timing of the scanning signal generated by the scanning driving circuit 14 to match the timing of the driving signal generated by the light source driving circuit 10, so that the timing of the scanning signal can be matched with the backlight module 22 to generate these colors. The timing of the backlight source, but the microcontroller 16 is not only used to control the color sequential liquid crystal display device, but also controls the electronic devices with the color sequential liquid crystal display device, such as handheld game consoles, digital photo frames, etc., that is, the microcontroller 16 must also execute the action instructions or functions of the electronic device, so the operating load of the microcontroller 16 is high, so the functions of the electronic device cannot be fully utilized. In addition, the microcontroller 16 is generated by using a program operation method or using an internal counter to calculate the timing. Timing signal, so it is impossible to control the timing of the light source driving circuit 10 to match the timing of the scanning driving circuit 14. In this way, the scanning signal generated by the scanning driving circuit 14 cannot be matched with the color backlight generated by the backlight module 22. And affect the display quality of display panel 20 display picture frame

[0006] In addition, the microprocessor 16 needs additional multiple pins to control the timing of the light source driving circuit 10 and the timing of the scanning driving circuit 14, such as GPIO pins, to control the cooperation between the light source driving circuit 10 and the scanning driving circuit 14, which will increase The number of pins of the microcontroller 16 increases the area occupied by the microcontroller 16 and increases the cost, and causes the volume of the electronic device to be limited by the use area of ​​the overall control circuit, making it difficult to achieve thin, light and small

In addition, the color sequential liquid crystal display device in the prior art supplies high-voltage power to the light source driving circuit 10, the data driving circuit 12 and the scanning driving circuit 14 through an external power chip (Power IC) 18, which will increase the cost

[0007] Therefore, the present invention proposes a control chip for a color-sequential liquid crystal display device in response to the above-mentioned problems, which can improve the shortcomings of traditional color-sequential liquid crystal display device control circuits that increase the load on the microcontroller and occupy an area, and can ensure that the scanning drive The circuit cooperates with the light source driving circuit to solve the above problems

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