Title:
DISPLAY DEVICE AND SOURCE DRIVER
Document Type and Number:
Japanese Patent JP2023146480
Kind Code:
A
Abstract:
PURPOSE: To provide a display device that can detect a failure of a logic circuit provided in the latter stage of a setting register in a source driver.CONSTITUTION: A display device includes a display controller and a plurality of source drivers that supply gradation voltage signals to a plurality of pixel portions in a display panel. Each of the plurality of source drivers includes: a setting register that stores setting data regarding the operation of the source driver; at least one calculation circuit that performs calculation on the basis of the setting data stored in the setting register and calculates a setting value for output of the gradation voltage signal; a source output portion that outputs the gradation voltage signal on the basis of a video data signal and the setting value; and a code value calculation portion that calculates an error detection code value corresponding to the setting value on the basis of a calculation result of the calculation circuit. The display controller detects a failure that has occurred in the calculation circuit in the plurality of source drivers on the basis of a calculation result of the code value in each of the plurality of source drivers.SELECTED DRAWING: Figure 2
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Inventors:
ISHII HIROAKI
Application Number:
JP2022053677A
Publication Date:
October 12, 2023
Filing Date:
March 29, 2022
Export Citation:
Assignee:
LAPIS TECH CO LTD
International Classes:
G09G3/36; G02F1/133; G09G3/20
Attorney, Agent or Firm:
Patent Attorney Corporation Rext International Patent Office