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Title:
DISPLAY DRIVER, SEMICONDUCTOR DEVICE, AND AMPLIFICATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2020/262142
Kind Code:
A1
Abstract:
[Problem] To provide a display driver, a semiconductor device, and an amplification circuit that are capable of suppressing increase in calorific value, power consumption, and device size and capable of driving the display driver at high speed. [Solution] The present invention includes: a hierarchical voltage generation unit and a decoder unit. The hierarchical voltage unit: includes first to kth amplifiers that receive first to kth reference voltages that have mutually different voltage values, receiving same separately and amplifying and outputting each separately with a gain of 1; and generates a plurality of hierarchical voltages by dividing voltages output from the first to kth amplifiers between each. The decoder unit: selects one hierarchical voltage corresponding to a luminance level indicated by a pixel data piece from among the plurality of hierarchical voltages; and generates a signal having this one hierarchical voltage, as a drive signal that drives the display device. Each of the first to kth amplifiers has a source and back gate connected to the output end of the amplifier, has a prescribed potential applied to a drain, and has provided therein a high-speed response circuit that includes at least one transistor that receives a reference voltage received by this amplifier, at the gate.

Inventors:
SHIIBAYASHI KENICHI (JP)
Application Number:
PCT/JP2020/023755
Publication Date:
December 30, 2020
Filing Date:
June 17, 2020
Export Citation:
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Assignee:
LAPIS SEMICONDUCTOR CO LTD (JP)
International Classes:
G09G3/20; G02F1/133; G09G3/3225; G09G3/36
Foreign References:
JPH04356816A1992-12-10
JPH10177367A1998-06-30
JPH11112247A1999-04-23
JP2010041368A2010-02-18
JP2004140487A2004-05-13
JP2005115365A2005-04-28
Attorney, Agent or Firm:
FUJIMURA Motohiko (JP)
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