Invention Grant
- Patent Title: Display driver
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Application No.: US15044090Application Date: 2016-02-15
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Publication No.: US10311825B2Publication Date: 2019-06-04
- Inventor: Christopher Ludden , Imre Knausz
- Applicant: National Semiconductor Corporation
- Applicant Address: US CA Santa Clara
- Assignee: NATIONAL SEMICONDUCTOR CORPORATION
- Current Assignee: NATIONAL SEMICONDUCTOR CORPORATION
- Current Assignee Address: US CA Santa Clara
- Agent Andy Viger; Charles A. Brill; Frank D. Cimino
- Main IPC: H04N9/69
- IPC: H04N9/69 ; G09G3/36

Abstract:
An LC display driver including a gamma reference circuit to generate N gamma-compensated reference voltages based on at least one pre-defined gamma curve divided into M regions defined by M+1 breakpoint voltages, each generated by a range-region DAC coupled to a subset of voltage taps of a range resistor string (some subsets overlapping). An output circuit generates the N gamma-compensated reference voltages, and includes a reference resistor string with N reference voltage taps, and M+1 breakpoint locations to receive respective breakpoint voltages, the N reference voltage taps divided into M subsets corresponding to the M regions of the gamma curve, each of the M subsets of reference voltage taps forming a voltage divider. N output selector circuits output a corresponding one of the N gamma-compensated reference voltages based on a respective reference voltage tap and the associated voltage divider.
Public/Granted literature
- US20160163277A1 DISPLAY DRIVER Public/Granted day:2016-06-09
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