Display driver, display device, and display system

Patent metadata

Field	Value
Publication number	US-10043492-B2
Application number	US-201514972450-A
Country	US
Kind code	B2
Filing date	Dec 17, 2015
Priority date	May 4, 2015
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

Provided are a display driver, a display device, and a display system. The display driver includes: an interface configured to receive a control signal and image data from a host, a sum of a number of columns and rows of the image data being less than a sum of a number of columns and rows of the display panel; an image splitter configured to split, based on the control signal, the image data into a plurality of image data respectively corresponding to a plurality of partial regions of the display panel, the plurality of partial regions being separate from each other; a storage configured to store the plurality of image data in a plurality of storage areas respectively corresponding to the plurality of partial regions; and a source driver configured to drive the display panel based on the plurality of image data output from the storage during one frame period.

First claim

What is claimed is:

1. A display driver integrated circuit for driving a display panel, the display driver integrated circuit comprising:
an interface configured to receive, from a host processor distinct from the display driver integrated circuit, a control signal and image data, a sum of a number of columns and a number of rows of the image data being less than a sum of a number of columns and a number of rows of the display panel;
an image splitter configured to split, based on the control signal, the image data into a plurality of image data respectively corresponding to a plurality of partial regions of the display panel, the plurality of partial regions being separate from each other;
a storage configured to store the plurality of image data in a plurality of storage areas respectively corresponding to the plurality of partial regions; and
a source driver configured to drive the display panel based on the plurality of image data output from the storage during one frame period,
wherein the image splitter is configured to, based on the control signal, control to update the plurality of storage areas respectively corresponding to the plurality of partial regions with the plurality of image data, and to control to maintain previous image data of a previous frame period in a storage area of the storage that does not correspond to any of the plurality of partial regions.

2. The display driver integrated circuit according to claim 1 , wherein the control signal comprises a multiple partial update parameter indicating that a current operation is to update multiple partial regions of the display panel.

3. The display driver integrated circuit according to claim 2 , wherein the control signal further comprises address information of the plurality of storage areas.

4. The display driver integrated circuit according to claim 3 , wherein the address information comprises at least one of:
a first indicator indicating a start column and an end column; and
a second indicator indicating a start row and an end row.

5. The display driver integrated circuit according to claim 4 , wherein:
the first indicator indicates a start column and an end column of a minimum rectangular region including the plurality of storage areas; and
the second indicator indicates a start row and an end row of the minimum rectangular region.

6. The display driver integrated circuit according to claim 4 , wherein the control signal further comprises size information of the plurality of storage areas.

7. The display driver integrated circuit according to claim 6 , wherein the size information comprises at least one of a plurality of horizontal sizes and a plurality of vertical sizes respectively of the plurality of storage areas.

8. The display driver integrated circuit according to claim 1 , wherein the interface is configured to receive the control signal, to transmit a tearing effect signal in response to the received control signal, and to receive the image data in response to the transmitted tearing effect signal.

9. The display driver integrated circuit according to claim 1 , wherein the interface is configured to communicate with the host processor based on a MOBILE INDUSTRY PROCESSOR INTERFACE (MIPI) method.

10. The display driver integrated circuit according to claim 1 , wherein the image splitter is implemented as hardware.

11. The display driver integrated circuit according to claim 1 , wherein the image splitter is configured to control to store the plurality of image data into the plurality of storage areas of the storage by moving a write pointer of the storage based on an offset obtained from the control signal.

12. The display driver integrated circuit according to claim 11 , wherein the image splitter is configured to, when the write pointer corresponds to a write address of an end column of a first storage area, among the plurality of storage areas, obtain as the offset an address difference from the end column of the first storage area to a start column of a second storage area, among the plurality of storage areas.

13. A method of driving a display panel, the method comprising:
receiving, by a display driver integrated circuit, a control signal and image data from a host processor distinct from the display driver, a sum of a number of columns and a number of rows of the image data is less than a sum of a number of columns and a number of rows of the display panel;
splitting, based on the control signal, the image data into a plurality of image data respectively corresponding to a plurality of partial regions of the display panel, the plurality of partial regions being separate from each other;
storing, in a storage, the plurality of image data in a plurality of storage areas respectively corresponding to the plurality of partial regions; and
driving the display panel based on the plurality of image data output from the storage during one frame period,
wherein the storing comprises, based on the control signal, controlling to update the plurality of storage areas respectively corresponding to the plurality of partial regions with the plurality of image data, and controlling to maintain previous image data of a previous frame period in a storage area of the storage that does not correspond to any of the plurality of partial regions.

14. The method according to claim 13 , wherein the control signal comprises a multiple partial update parameter indicating that a current operation is to update multiple partial regions of the display panel.

15. The method according to claim 14 , wherein the control signal further comprises address information of the plurality of storage areas.

16. The method according to claim 15 , wherein the control signal further comprises size information of the plurality of storage areas.

17. The method according to claim 13 , wherein the receiving the control signal and the image data comprises sequentially receiving the image data in row units from a start row to an end row of the plurality of partial regions.

18. The method according to claim 13 , wherein the receiving the control signal and the image data comprises receiving the control signal, transmitting a tearing effect signal in response to the received control signal, and receiving the image data in response to the transmitted tearing effect signal.

19. The method according to claim 13 , wherein the storing comprises storing the plurality of image data into the plurality of storage areas of the storage by moving a write pointer of the storage based on an offset obtained from the control signal.

20. The method according to claim 19 , wherein the storing further comprises, when the write pointer corresponds to a write address of an end column of a first storage area, among the plurality of storage areas, obtaining as the offset an address difference from the end column of the first storage area to a start column of a second storage area, among the plurality of storage areas.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Woo Soo-Young
• Kim Yang-Hyo
• Kim Do-Kyung

Classifications

• G09G2310/0232

  Special driving of display border areas · CPC title

• G09G2340/0442

  Handling or displaying different aspect ratios, or changing the aspect ratio · CPC title

• G09G5/393 Primary

  Arrangements for updating the contents of the bit-mapped memory · CPC title

• G09G5/397

  Arrangements specially adapted for transferring the contents of two or more bit-mapped memories to the screen simultaneously, e.g. for mixing or overlay (G09G5/02 takes precedence) · CPC title

• G09G3/3225

  using an active matrix · CPC title