Drive circuit, data line drive circuit, electro-optical device, electronic apparatus, and mobile body

Patent metadata

Field	Value
Publication number	US-11217198-B2
Application number	US-202016801937-A
Country	US
Kind code	B2
Filing date	Feb 26, 2020
Priority date	Feb 27, 2019
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A drive circuit of an electro-optical panel (10) is provided with a driving signal generation unit (240) that output a plurality of driving signals to the electro-optical panel (10), a control circuit (400) that outputs display image data indicating an image to be displayed in the electro-optical panel (10), a processing circuit (210) configured to generate input data to the driving signal generation unit (240) based on the display image data, and an error detection circuit (410) configured to detect an error in the input data.

First claim

What is claimed is:

1. A drive circuit comprising:
a driving signal generation unit that outputs a driving signal to an electro-optical panel;
a control circuit that outputs display image data indicating an image to be displayed in the electro-optical panel; and
a processing circuit configured to generate input data to the driving signal generation unit based on the display image data,
wherein the processing circuit includes a data transfer portion configured to transfer the input data to the control circuit, and
the control circuit includes an error detection circuit configured to detect an error in the input data.

2. The drive circuit according to claim 1 ,
wherein the error detection circuit includes:
a first error detection data storage that stores first error detection data generated from the display image data that the control circuit outputs to the processing circuit;
an error detection computation portion configured to generate second error detection data generated from the input data transferred from the data transfer portion; and
a collator configured to collate the first error detection data with the second error detection data.

3. The drive circuit according to claim 2 , wherein the error detection computation portion is configured to generate the first error detection data from the display image data.

4. The drive circuit according to claim 2 ,
wherein the error detection circuit includes:
an acceptor that accepts input image data to which the first error detection data is added, and
the error detection circuit is configured to generate the display image data from the input image data.

5. The drive circuit according to claim 1 ,
wherein the driving signal includes a first driving signal and a second driving signal,
the electro-optical panel includes a first data line and a second data line,
the processing circuit includes an input data storage that stores the display image data including first image data and second image data, and outputs the input data including the stored first image data and second image data,
the driving signal generation unit outputs the first driving signal to the first data line based on the first image data in the input data, and outputs the second driving signal to the second data line based on the second image data in the input data, and
the data transfer portion performs a parallel input operation for taking in the input data from the input data storage at the same time, and a serial output operation for sequentially outputting the taken-in input data including the first image data and the second image data to the control circuit.

6. The drive circuit according to claim 5 ,
wherein the input data storage sequentially stores the display image data including the first image data and the second image data in synchronization with a first clock, and outputs the stored display image data including the first image data and the second image data as the input data in synchronization with a second clock, and
the data transfer portion performs the serial output operation in synchronization with a third clock in a period in which the input data storage stores the display image data including the first image data and the second image data.

7. An electro-optical device comprising the drive circuit according to claim 1 .

8. An electronic apparatus comprising the drive circuit according to claim 1 .

9. A mobile body comprising the drive circuit according to claim 1 .

10. A data line drive circuit comprising:
a driving signal generation unit that outputs a driving signal to an electro-optical panel;
an input data storage that receives display image data indicating an image to be displayed in the electro-optical panel, and outputs the received data to the driving signal generation unit as input data; and
a data transfer portion configured to transfer the input data to the outside.

11. An electro-optical device comprising the data line drive circuit according to claim 10 .

12. An electronic apparatus comprising the data line drive circuit according to claim 10 .

13. A mobile body comprising the data line drive circuit according to claim 10 .

Assignees

• Seiko Epson Corp

Inventors

• Muraki Norichika

Classifications

• G09G2310/027

  Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters · CPC title

• G09G2380/10

  Automotive applications · CPC title

• G09G3/006

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title

• G09G3/3688 Primary

  suitable for active matrices only · CPC title

• G09G2330/12

  Test circuits or failure detection circuits included in a display system, as permanent part thereof · CPC title