System and method of transmitting video data

• US 20060066596A1
• Filed: 04/01/2005
• Published: 03/30/2006
• Est. Priority Date: 09/27/2004
• Status: Abandoned Application

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Inventors: Chui, Clarence, Sampsell, Jeffrey B., Mathew, Mithran
• Application Number:
  US11/097,820
• Publication Number:
  US 20060066596A1
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: G06F 3/1431 using a single graphics controller
• CPC Class Codes: G09G 2300/0857 Static memory circuit, e.g. flip-flop
• CPC Class Codes: G09G 2310/0278 Details of driving circuits arranged to drive both scan and data electrodes
• CPC Class Codes: G09G 2310/04 Partial updating of the display screen
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2360/18 Use of a frame buffer in a display terminal, inclusive of the display panel
• CPC Class Codes: G09G 3/2096 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 3/3466 based on interferometric effect
• 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

One embodiment comprises a display controller having two interfaces for receiving video data. In one embodiment, video data that is transmitted to the first of the two interfaces is stored in a frame buffer. Video data that is transmitted to the second of the two interfaces is transmitted independently of the frame buffer and directly to an array driver for display. By limiting the usage of a frame buffer, potential power savings may be achieved. In one embodiment, a client device is manufactured to not include any frame buffer to further reduce manufacturing costs and obtain further power savings.

Claims

1. A system comprising:

a central processing unit;

a plurality of bi-stable display elements; and

a driver controller configured to receive video data from the central processing unit and display the video data independently of a frame buffer and via the plurality of bi-stable display elements.

2. The system of claim 1, wherein the bi-stable display elements are comprised of interferometric modulators.

3. The system of claim 1, additionally comprising a sensing circuit configured to sense the state of any one of the bi-stable display elements.

4. The system of claim 1, additionally comprising:

a stimulus generator for generating an electrical stimulus to one of the bi-stable display elements; and

a sense circuit configured to sense a response to the generated electrical stimulus.

5. The system of claim 1, wherein the driver controller modifies a state of a subset of the plurality of bi-stable display elements in response to sensing a previous state.

6. The system of claim 1, additionally comprising:

a frame buffer;

a first interface in the driver controller, the first interface configured to receive video data and store the video data in the frame buffer; and

a second interface in the driver controller, the second interface being configured to receive video data and transmit the video data to the array driver independently of the frame buffer.

7. The system of claim 6, additionally comprising:

an arbiter, the arbiter being configured to accept video data from the first interface and the second interface, and to arbitrate between data from the first interface and data from the second interface for access to the array driver.

8. The system of claim 6, additionally comprising:

an arbiter, the arbiter being configured to accept video data from the first interface and the second interface, and to perform data flow management functions.

9. The system of claim 8, wherein the driver controller comprises the arbiter.

10. The system of claim 8, wherein the array driver comprises the arbiter.

11. A system, comprising:

an array of bi-stable display elements;

a frame buffer;

a driver controller having a first interface and a second interface, the driver controller configured to store video data received via the first interface in the frame buffer, the driver controller transmitting the video data received via the second interface directly to the array of bi-stable display elements; and

a central processing unit configured to provide video data for display by the array of bi-stable display elements, the video display being transmitted via either the first interface or the second interface.

12. The system of claim 11, additionally comprising a sensing circuit for sensing the state of one of bi-stable display elements.

13. The system of claim 11, wherein video data that is received via the first interface is displayed in a first region of a display and wherein video data that is received via the second interface is displayed in a second region of the display.

14. The system of claim 13, wherein the size and location of the first region is defined by a server computer.

15. The system of claim 13, wherein the size and location of the first region is defined by a client device.

16. The system of claim 13, wherein the size and location of the first region is defined by a user.

17. The system of claim 13, wherein the first region and the second region each have an adjustable refresh rate.

18. A method of displaying video data, the method comprising:

receiving video data; and

displaying, independently of a frame buffer, the received video data via an array of bi-stable display elements.

19. The method of claim 18, additionally comprising sensing a state of one of the bi-stable display elements.

20. The method of claim 19, additionally comprising modifying a state of a subset of the plurality of bi-stable display elements in response to sensing a previous state.

21. A system for displaying video data, the system comprising:

means for receiving video data; and

means for displaying, independently of a frame buffer, the received video data via an array of bi-stable display elements.

22. The system of claim 21, additionally comprising means for sensing a state of one of the bi-stable display elements.

23. The method of claim 22, additionally comprising means for modifying a state of a subset of the plurality of bi-stable display elements in response to sensing a previous state.