IP Library › Granted Patent US 12,236,917
Granted Patent B2
US 12,236,917 · App. 18/067,267 · Granted Feb 25, 2025

Larger backplane suitable for high speed applications

Inventors: Bo Li (Clara, CA); Kaushik Sheth (Hsinchu, TW)
Assignee: Google LLC
G09G3/3688G09G2360/12
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Quick Facts
Patent No.
US 12,236,917
App. No.
18/067,267
Granted
Feb 25, 2025
Kind
B2
Abstract

A display system comprising a plurality of display controller circuits controlling a like number of independent segments of pixel drive circuits of a backplane. Each pixel drive circuit comprises a memory element and associated pixel drive circuitry. The segments of the backplane may be organized vertically. The word line for the memory cells of a first segment of pixel drive circuits passes underneath a second segment of pixel drive circuits without directly interacting with the pixel drive circuits of the second segment in order to reach the pixel drive circuits of the first segment. The plurality of display controller circuits operate asynchronously but are kept at the same frame rate by an external signal such as Vsync.

Claims (40)

1. A display system, comprising:

a first word line driver including a far section and a near section;

a second word line driver;

a plurality of independent segments of pixel drive circuits of a backplane, the plurality of independent segments of pixel drive circuits being disposed between the first word line driver and the second word line driver, the first word line driver being aligned parallel to the second word line driver; and

a plurality of display controller circuits configured to control the plurality of independent segments of pixel drive circuits, the far section and the near section are associated with separate display controllers of the plurality of display controller circuits

the plurality of independent segments of pixel drive circuits each including pixel drive circuitry corresponding with a memory element.

2. The display system of claim 1 , wherein the first word line driver is vertically aligned, at least one of the plurality of independent segments is vertically aligned.

3. The display system of claim 1 , wherein each of the plurality of display controller circuits is associated with one of the plurality of independent segments of pixel driver circuits.

4. The display system of claim 1 , further comprising:

an image data preprocessor configured to be communicatively coupled to the plurality of display controller circuits, the image data preprocessor being configured to separate image data into each of the plurality of independent segments of pixel drive circuits.

5. The display system of claim 1 , wherein at least one of the plurality of independent segments includes a dummy metal structure.

6. The display system of claim 1 , wherein the first word line driver is communicatively coupled to a first of the plurality of independent segments by a word line that passes under a second of the plurality of independent segments without making an electrical connection to the second of the plurality of independent segments.

7. The display system of claim 1 , wherein a first of the plurality of independent segments is not of equal width with a second of the plurality of independent segments.

8. The display system of claim 1 , wherein the far section is disposed between the near section and the plurality of independent segments of pixel drive circuits.

9. A backplane, comprising:

a first word line driver;

a second word line driver aligned parallel to the first word line driver;

an array of pixel drive circuits having a first section and a second section, the first section of the array of pixel drive circuits and the second section of the array of pixel drive circuits being vertically aligned, the array of pixel drive circuits being disposed between the first word line driver and the second word line driver, the first word line driver including a far section and a near section, the far section configured to control the first section and the near section configured to control the second section;

a first display controller circuit configured to control the first section of the array of pixel drive circuits; and

a second display controller circuit configured to control the second section of the array of pixel drive circuits,

the first section of the array of pixel drive circuits including a memory element and pixel drive circuitry corresponding with the memory element.

10. The backplane of claim 9 , wherein the first word line driver is vertically aligned.

11. The backplane of claim 9 , further comprising:

an image data preprocessor communicatively coupled to the first display controller circuit and the second display controller circuit, the image data preprocessor being configured to separate image data into each of the first display controller circuit and the second display controller circuit.

12. The backplane of claim 9 , wherein at least one of the first section of the array of pixel drive circuits or the second section of the array of pixel drive circuits includes a dummy metal structure.

13. The backplane of claim 9 , further comprising:

a word line driver communicatively coupled to the first section of the array of pixel drive circuits by a word line that passes under the second section of the array of pixel drive circuits without making an electrical connection and to the second section of the array of pixel drive circuits.

14. The backplane of claim 9 , wherein the first section of the array of pixel drive circuits has a width not equal to a width of the second section of the array of pixel drive circuits.

15. The backplane of claim 9 , wherein the far section is disposed between the array of pixel drive circuits and the near section.

16. A backplane, comprising:

a first word line driver including a far section and a near section;

a second word line driver;

an array of pixel drive circuits disposed between the first word line driver and the second word line driver, the array of pixel driver circuits having a first section and a second section, the first section of the array of pixel drive circuits being aligned parallel with the second section of the array of pixel drive circuits, the far section configured to control the first section and the near section configured to control the second section;

a first display controller circuit configured to control the first section of the array of pixel drive circuits; and

a second display controller circuit configured to control the second section of the array of pixel drive circuits.

17. The backplane of claim 16 , wherein the first section of the array of pixel drive circuits includes a memory element and pixel drive circuitry corresponding with the memory element.

18. The backplane of claim 16 , further comprising:

a word line driver communicatively coupled to the first section of the array of pixel drive circuits by a word line that passes under the second section of the array of pixel drive circuits without making an electrical connection and to the second section of the array of pixel drive circuits.

19. The backplane of claim 16 , further comprising:

an image data preprocessor communicatively coupled to the first display controller circuit and the second display controller circuit, the image data preprocessor being configured to separate image data into each of the first display controller circuit and the second display controller circuit.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 25, 2024
From: RAXIUM INC.
To: GOOGLE LLC
Reel/Frame 069027/0370 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 25, 2024
From: JASPER DISPLAY CORPORATION
To: RAXIUM, INC.
Reel/Frame 069027/0667 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 22, 2022
From: LI, BO; SHETH, KAUSHIK
To: JASPER DISPLAY CORP.
Reel/Frame 062179/0059 →
Continuity (3)
Continuation 17354419 · Jun 22, 2021
Provisional Application 63045252 · Jun 29, 2020
Related Publication 20230197029A1 · Jun 22, 2023
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