Invention Application
- Patent Title: DISPLAY DRIVING CIRCUIT
- Patent Title (中): 显示驱动电路
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Application No.: US14822422Application Date: 2015-08-10
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Publication No.: US20170046993A1Publication Date: 2017-02-16
- Inventor: Yu-Kuang CHANG , Kuei-Chung CHANG , Ming-Da CHIANG
- Applicant: NOVATEK MICROELECTRONICS CORP.
- Applicant Address: TW Hsinchu
- Assignee: NOVATEK MICROELECTRONICS CORP.
- Current Assignee: NOVATEK MICROELECTRONICS CORP.
- Current Assignee Address: TW Hsinchu
- Main IPC: G09G3/20
- IPC: G09G3/20

Abstract:
A display driving circuit comprising a video signal transformation circuit, a reference voltage generating circuit, a DAC and an interpolation operational amplifier is provided. The video signal transformation circuit transforms an input video signal into a transformed video signal with a higher bit depth.The transformed video signal comprises an upper n bits data and a lower m bits data, wherein n+m equals a bit depth of the transformed video signal. The reference voltage generating circuit generates reference voltages. The DAC selects a first reference voltage and a second reference voltage to interpolation operational amplifier from the reference voltages according to an upper n bits data of the transformed video signal. The interpolation operational amplifier outputs a driving voltage to display device according to the first reference voltage, the second reference voltage and the lower m bits data of the transformed video signal.
Information query