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Panel drive circuit

A panel drive circuit, conversion circuit technology, applied in the direction of cathode ray tube indicators, instruments, static indicators, etc., can solve the problems of wasting chip power consumption, occupying chip area, etc., to reduce the occupied area and power consumption, reduce running The effect of the number of lines

Active Publication Date: 2014-10-01
NOVATEK MICROELECTRONICS CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the area on the chip will be considerably occupied and the power consumption on the chip will be wasted

Method used

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Embodiment Construction

[0020] The following embodiments disclose a panel driving circuit. The panel drive circuit includes a video signal conversion circuit, a reference voltage generation circuit, a digital-to-analog converter and an interpolation operational amplifier. The video signal conversion circuit converts the video signal into a high-bit video signal according to a look-up table (Lookup Table, LUT). The video signal is selectively one of several video signals and the high-bit video signal is selectively one of several high-bit video signals. The high-bit video signal includes a first part of data and a second part of data, and the number of bits of the high-bit video signal is greater than that of the video signal before conversion. The reference voltage generation circuit generates several reference voltages. The digital-to-analog converter selects a first reference voltage and a second reference voltage corresponding to the first part of data among several reference voltages. The inte...

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Abstract

The invention provides a panel drive circuit which comprises a video signal conversion circuit, a reference voltage generating circuit, a digital analog converter and an interpolation operational amplifier. The video signal conversion circuit is used for converting video signals to high-order digit video signals according to a look-up table. The high-order digit video signals comprise first data and second data and are larger than the video signals before conversion in digit. The reference voltage generating circuit generates a plurality of reference voltages. The digital analog converter selects a first reference voltage and a second reference voltage corresponding to the first data from the reference voltages. The interpolation operational amplifier outputs drive voltages corresponding to the high-order digit video signals after conversion according to the first reference voltage, the second reference voltage and the second data.

Description

[0001] This application is a divisional application of the invention patent application with the application number "201110043260.3" and the invention name "panel driving circuit" submitted by the applicant on February 15, 2011. technical field [0002] The present invention relates to a driving circuit, and in particular to a panel driving circuit. Background technique [0003] Please refer to figure 1 , figure 1 Shown is a partial schematic diagram of a conventional panel driving circuit. The conventional panel drive circuit 10 includes a positive red grayscale voltage generation circuit 12a, a positive green grayscale voltage generation circuit 12b, a positive blue grayscale voltage generation circuit 12c, a negative red grayscale voltage generation circuit 12d, and a negative green grayscale voltage generation circuit. 12e, Negative red gray scale voltage generation circuit 12f, Digital to Analog Converter (Digital to Analog Converter, DAC) 13, Gamma Register (Gamma Re...

Claims

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Application Information

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IPC IPC(8): G09G3/20G09G5/06
Inventor 张佑匡张桂忠江明达
Owner NOVATEK MICROELECTRONICS CORP