Display unit, electronic device using the same, and method of inspecting the display unit

• US 20040066382A1
• Filed: 10/02/2003
• Published: 04/08/2004
• Est. Priority Date: 08/12/1999
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Aoki, Shigeki
• Granted Patent: US 7,129,936 B2
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: G06F 11/006 Identification G06F11/2289 takes precedence
• CPC Class Codes: G06F 11/2221 to test input/output devices or peripheral units
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/12 Test circuits or failure detection circuits included in a display system, as permanent part thereof
• CPC Class Codes: G09G 2370/042 for monitor identification
• CPC Class Codes: G09G 3/006 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 Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: Y10S 345/904 Display with fail/safe testing feature

Abstract

A display unit of which inspection process to inspect a connector for faulty connection can be automated. The display unit comprises a display section, a display driver IC among a plurality of types of display driver ICs capable of driving and controlling the display section, and an MPU sending a command and display data to the display driver IC. The display driver IC comprises an ID setting circuit and a command decoder decoding the command from the MPU. The MPU reads an ID information so as to control the display driver IC among a plurality of types of display driver ICs according to the corresponding control contents in the storage section among the plurality of types of control contents for a plurality of types of display driver ICs.

Claims

1. A display unit comprising:

a display section;

a display driver IC among a plurality of types of display driver ICs capable of driving and controlling the display section; and

an MPU sending a command and display data to the display driver IC,

wherein the display driver IC comprises;

an ID setting circuit; and

a command decoder decoding the command from the MPU,

wherein the MPU has a storage section for storing a plurality of types of control contents for a plurality of types of display driver ICs including the display driver IC,

wherein the MPU sends an ID monitor command to the display driver IC when the MPU reads an ID from the ID setting circuit,

wherein the display driver IC sends ID information from the ID setting circuit to the MPU in accordance with a signal generated by the command decoder decoding the ID monitor command, and

wherein the MPU reads the ID information so as to control the display driver IC among a plurality of types of display driver ICs according to the corresponding control contents in the storage section among the plurality of types of control contents for a plurality of types of display driver ICs including the display driver IC.