DISPLAY APPARATUS AND IMAGE DISPLAYING METHOD

• US 20110001754A1
• Filed: 06/29/2010
• Published: 01/06/2011
• Est. Priority Date: 07/06/2009
• Status: Abandoned Application

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: Renesas Electronics Corporation
• Inventors: YOKOYAMA, Ryota
• Application Number:
  US12/825,999
• Publication Number:
  US 20110001754A1
• Time in Patent Office: Days
• US Class Current: 345/536
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2340/16 Determination of a pixel data signal depending on the signal applied in the previous frame
• CPC Class Codes: G09G 2360/18 Use of a frame buffer in a display terminal, inclusive of the display panel
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 5/395 Arrangements specially adapted for transferring the contents of the bit-mapped memory to the screen G09G5/399 takes precedence

Abstract

A display apparatus includes: a display panel; and a frame memory configured to store an image data. An overdrive control section is configured to perform overdrive processing on a first image data read from the frame memory in a current frame period, by using a second image data read from the frame memory in a previous frame period to drive the display panel. A display panel drive control section is configured to drive the display panel based on the overdrive-processed image data.

Claims

1. A display apparatus comprising:

a display panel;

a frame memory configured to store an image data;

an overdrive control section configured to perform overdrive processing on a first image data read from said frame memory in a current frame period, by using a second image data read from said frame memory in a previous frame period to generate overdrive-processed data; and

a display panel drive control section configured to drive said display panel based on the overdrive-processed data.

2. The display apparatus according to claim 1, further comprising:

an overdrive only storage unit,

wherein said display panel drive control section writes said second image data in said overdrive only storage unit in the previous frame period by using as a write start address a first address corresponding to a head address of an image data used to drive said display panel, and reads said first image data from said frame memory by using as a read start address in the current frame period, a second address different from the read start address in the previous frame period, and

said overdrive control section reads said second image data from said overdrive only storage unit by using said first address as the read start address in the current frame period and performs the overdrive processing on said first image data.

3. The display apparatus according to claim 2, wherein said first address is a start address of said overdrive only storage unit.

4. The display apparatus according to claim 2, wherein said first address is an address corresponding to the read start address in the previous frame period.

5. The display apparatus according to claim 1, wherein said overdrive control section adds a correction value determined based on a comparison result of said first image data and said second image data, to said first image data to generate a display image data to drive said display panel.

6. An image display method comprising:

storing an image data in a frame memory;

reading a first image data from said frame memory in a current frame period;

performing overdrive processing on said first image data, by using a second image data read from said frame memory in a previous frame period to generate overdrive-processed data; and

driving a display panel based on the overdrive-processed image data.

7. The image display method according to claim 6, further comprising:

writing said second image data in an overdrive only storage unit in a previous frame period by using as a write start address a first address corresponding to a head address of an image data used to drive said display panel,

wherein said reading said first image data comprises;

reading said first image data from said frame memory by using as the read start address in the current frame period, a second address different from the read start address in the previous frame period, and

wherein said performing overdrive processing comprises;

reading said second image data from said overdrive only storage unit by using said first address as the read start address in the current frame period.

8. The image display method according to claim 7, wherein said first address is a start address of said overdrive only storage unit.

9. The image display method according to claim 7, wherein said first address is an address corresponding to the read start address in the previous frame period.

10. The image display method according to claim 6, wherein said performing overdrive processing comprises:

adding a correction value determined based on a comparison result of said first image data and said second image data to said first image data to generate a display image data to drive said display panel.