Title:
DISPLAY DRIVER AND SEMICONDUCTOR DEVICE
Document Type and Number:
Japanese Patent JP2019095545
Kind Code:
A
Abstract:
To provide a display driver and a semiconductor device with which it is possible to suppress an increase in device scale and drive a display device at high speed with low power consumption.SOLUTION: The display driver comprises: a data capture unit for capturing pixel data and outputting it synchronously with edges of a clock signal; an amp for amplifying a grayscale voltage that corresponds to the pixel data outputted from the data capture unit; and a bias voltage generation unit for generating a bias voltage to set the current value of operation current of the amp and supplying it to the amp, the bias voltage generation unit including a register that stores first information that represents a bias voltage for setting the current value of operation current to the first current value and second information that represents a bias voltage for setting the current value of operation current to a second current value lower than the first current value. The bias voltage generation unit generates a bias voltage of the first voltage value before a first period elapses after an edge of the clock signal and switches it to the second voltage value when the first period has elapsed.SELECTED DRAWING: Figure 5
Inventors:
AIZAWA YOKI
Application Number:
JP2017223602A
Publication Date:
June 20, 2019
Filing Date:
November 21, 2017
Export Citation:
Assignee:
LAPIS SEMICONDUCTOR CO LTD
International Classes:
G09G3/20; G09G3/36; H01L27/32; H01L51/50
Domestic Patent References:
| JPH02235092A | 1990-09-18 | |||
| JP2013162145A | 2013-08-19 | |||
| JP2015211266A | 2015-11-24 | |||
| JP2004029316A | 2004-01-29 |
Foreign References:
| US20160180764A1 | 2016-06-23 |
Attorney, Agent or Firm:
Motohiko Fujimura
Shinji Takano
Shinji Takano