DISPLAY DRIVE DEVICE, DISPLAY DRIVE SYSTEM, INTEGRATED CIRCUIT DEVICE, AND DISPLAY DRIVE METHOD

• US 20150269909A1
• Filed: 03/17/2015
• Published: 09/24/2015
• Est. Priority Date: 03/24/2014
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: ISHIKAWA, Atsushi
• Application Number:
  US14/660,300
• Publication Number:
  US 20150269909A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 3/2096 Details of the interface to the display terminal specific for a flat panel suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167
• CPC Class Codes: G09G 5/12 Synchronisation between the display unit and other units, e.g. other display units, video-disc players
• CPC Class Codes: G09G 5/18 Timing circuits for raster scan displays specially adapted for television H04N ; synchronisation between the display unit and other display units, videodisc player G09G5/12

Abstract

A display drive device, a display drive system, an integrated circuit device, and a display drive method are provided that can handle a plurality of input signals having different specifications. A display drive device 1 includes an external signal detection unit 10 that measures an external timing signal S1 and generates a detection signal S2, a processing unit 20 that generates an internal timing signal S3 based on the detection signal S2, and a drive control signal generation unit 30 that generates, based on the internal timing signal S3, a drive control signal S4 for displaying image information on a display panel 500. The processing unit 20 has a plurality of specifications, determines, based on the detection signal S2, one of the plurality of specifications to which the external timing signal S1 corresponds, and generates the internal timing signal S3 based on the corresponding specification.

Claims

1. A display drive device comprising:

an external signal detection unit that measures an external timing signal and generates a detection signal;

a processing unit that generates an internal timing signal based on the detection signal; and

a drive control signal generation unit that generates, based on the internal timing signal, a drive control signal for displaying image information on a display panel,

wherein the processing unit has a plurality of specifications for generating the internal timing signal, determines, based on the detection signal, one of the plurality of specifications to which the external timing signal corresponds, and generates the internal timing signal based on the corresponding specification.

2. The display drive device according to claim 1,

wherein the processing unit performs the determination if the detection signal has changed.

3. The display drive device according to claim 1,

wherein the processing unit has a storage unit that stores the plurality of specifications.

4. The display drive device according to claim 1,

wherein the external timing signal includes a vertical synchronizing signal, a horizontal synchronizing signal, an enable signal, and a dot clock signal, and

the external signal detection unit generates the detection signal by counting the vertical synchronizing signal, the horizontal synchronizing signal, and the enable signal, using the dot clock signal as a reference.

5. The display drive device according to claim 1,

wherein, if a part of the external timing signal does not satisfy the corresponding specification, the processing unit generates the internal timing signal while assuming that the corresponding specification is satisfied.

6. The display drive device according to claim 1,

wherein the processing unit generates the internal timing signal based on continuity of the external timing signal.

7. A display drive system comprising:

the display drive device according to claim 1;

a first display signal generation circuit that generates a first display signal including the external timing signal and display data;

a second display signal generation circuit that generates a second display signal including the external timing signal and display data; and

a display signal selection circuit that selects one of the first display signal and the second display signal and outputs the selected display signal to the display drive device.

8. An integrated circuit device comprising the display drive device according to claim 1.

9. A display drive method comprising:

measuring an external timing signal and generating a detection signal;

generating an internal timing signal based on the detection signal; and

generating, based on the internal timing signal, a drive control signal for displaying image information on a display panel,

wherein, in the generating of the internal timing signal, a plurality of specifications for generating the internal timing signal are provided, one of the plurality of specifications to which the external timing signal corresponds is determined based on the detection signal, and the internal timing signal is generated based on the corresponding specification.