# US 11,908,387 B1 · Display backplane with shared drivers for light source devices

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- Number: US 11,908,387 B1
- Document ID: US11908387B1
- Status: Granted
- Kind: B1
- Application number: 17/981,987
- Filed: 2022-11-07
- Granted: 2024-02-20
- Earliest claimed: 2022-11-07
- Assignees: Syndiant, Inc.; XDMicro (Zhongshan) Optoelectronics Semiconductor Co., LTD
- Applicants: Syndiant Inc.; XDMicro (Zhongshan) Optoelectronics Semiconductor
- Inventors: Chun Chiu Daniel Wong; Craig Michael Waller
- Web page: https://patentgrep.com/patent/US11908387B1

## CPC

- G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED]
- G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED]
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- G09G 2310/0235: Field-sequential colour display
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

A display with multiple light sources sharing a device driver is disclosed. In one embodiment of the present invention a display includes a first device driver, a first light source, a second light source and a first light-source selection circuit which is coupled to the first device driver, the first light source and the second light source. The first light-source selection circuit is configured to pair the first device driver with the first light source during a first time interval and to pair the first device driver with the second light source in a second time interval.

## Claims

### Claim 1

A display comprising:
a first device driver;
a second device driver;
a third device driver;
a first light source;
a second light source;
a third light source;
a first light-source selection circuit coupled to the first device driver, the second device driver, the third device driver, the first light source, the second light source, and the third light source;
wherein the first light-source selection circuit is configured to pair the first device driver with the first light source during a first time interval;
wherein the first light-source selection circuit is configured to pair the first device driver with the second light source during a second time interval;
wherein the first light-source selection circuit is configured to pair the first device driver with the third light source during a third time interval;
wherein the first light-source selection circuit is configured to pair the second device driver with the second light source during the first time interval;
wherein the first light-source selection circuit is configured to pair the third device driver with the third light source during the first time interval;
wherein the first light-source selection circuit is configured to pair the second device driver with the third light source during the second time interval;
wherein the first light-source selection circuit is configured to pair the third device driver with the first light source during the second time interval;
wherein the first light-source selection circuit is configured to pair the second device driver with the first light source during the third time interval;
wherein the first light-source selection circuit is configured to pair the third device driver with the second light source during the third time interval.

### Claim 2 (depends on 1)

The display of claim 1, wherein:
the first time interval is a first sub-period of a frame time period;
the second time interval is a second sub-period of the frame time period; and
the third time interval is a third sub-period of the frame time period.

### Claim 3 (depends on 1)

The display of claim 1, wherein:
the first light source is a first color;
the second light source is a second color;
the third light source is a third color.

### Claim 4 (depends on 3)

The display of claim 3, wherein the first color is red, the second color is green, and the third color is blue.

### Claim 5 (depends on 1)

The display of claim 1, further comprising:
a fourth light source coupled to the first light-source selection circuit;
a fifth light source coupled to the first light-source selection circuit;
a sixth light source coupled to the first light-source selection circuit;
a seventh light source coupled to the first light-source selection circuit;
a eighth light source coupled to the first light-source selection circuit; and
a ninth light source coupled to the first light-source selection circuit.

### Claim 6 (depends on 5)

The display of claim 5, wherein:
the first light-source selection circuit is configured to pair the first device driver with the fourth light source, the fifth light source, the sixth light source, the seventh light source, the eighth light source, and the ninth light source during a fourth time interval, a fifth time interval, a sixth time interval, a seventh time interval, an eighth time interval, and a ninth time interval, respectively;
the first light-source selection circuit is configured to pair the second device driver with the fourth light source, the fifth light source, the sixth light source, the seventh light source, the eighth light source, the ninth light source, the first light source, the second light source, and the third light source during the first time interval, the second time interval, the third time interval, the fourth time interval, the fifth time interval, the sixth time interval, the seventh time interval, the eighth time interval, and the ninth time interval, respectively; and
the first light-source selection circuit is configured to pair the third device driver with the seventh light source, the eighth light source, the ninth light source, the first light source, the second light source, the third light source, the fourth light source, the fifth light source, and the sixth light source during the first time interval, the second time interval, the third time interval, the fourth time interval, the fifth time interval, the sixth time interval, the seventh time interval, the eighth time interval, and the ninth time interval, respectively.

### Claim 7 (depends on 1)

The display of claim 1, wherein the second light source is stacked on the first light source and third light source is stacked on the second light source.

### Claim 8

A display comprising:
a first device driver;
a second device driver;
a first light source;
a second light source;
a third light source;
a fourth light source;
a first light-source selection circuit coupled to the first device driver, the second device driver, the first light source, the second light source, the third light source, and the fourth light source;
wherein the first light-source selection circuit is configured to pair the first device driver with the first light source during a first time interval; and
wherein the first light-source selection circuit is configured to pair the first device driver with the second light source during a second time interval;
wherein the first light-source selection circuit is configured to pair the first device driver with the third light source during a third time interval;
wherein the first light-source selection circuit is configured to pair the first device driver with the fourth light source during a fourth time interval; and
wherein the first light-source selection circuit is configured to pair the second device driver with the third light source, the fourth light source, the first light source, and the second light source, during the first time interval, the second time interval, the third time interval and the fourth time interval, respectively.

### Claim 9 (depends on 1)

The display of claim 1, wherein the first light source is a light emitting diode.

### Claim 10 (depends on 1)

The display of claim 1, wherein the first light source is a micro light emitting diode.

### Claim 11 (depends on 1)

The display of claim 1, wherein the first light source is an organic light emitting diode.

### Claim 12

A display comprising:
a first device driver;
a second device driver;
a first light source of a first color;
a second light source of a second color;
a third light source of the second color;
a fourth light source of a third color;
a fifth light source of the third color;
a sixth light source of the first color;
a first light-source selection circuit coupled to the first device driver, the first light source, the second light source, and the fifth light source;
a second light-source selection circuit coupled to the second device driver, the third light source, the fourth light source, and the sixth light source;
wherein the first light-source selection circuit is configured to pair the first device driver with the first light source during a first time interval;
wherein the first light-source selection circuit is configured to pair the first device driver with the second light source during a second time interval;
wherein the first light-source selection circuit is configured to pair the first device driver with the fifth light source during a third time interval;
wherein the second light-source selection circuit is configured to pair the second device driver with the third light source during the first time interval; and
wherein the second light-source selection circuit is configured to pair the second device driver with the fourth light source during the second time interval; and
wherein the second light-source selection circuit is configured to pair the second device driver with the sixth light source during the third time interval.

### Claim 13 (depends on 12)

The display of claim 12 wherein:
the first time interval is a first sub-period of a frame time period;
the second time interval is a second sub-period of the frame time period; and
the third time interval is a third sub-period of the frame time period.

### Claim 14 (depends on 1)

The display of claim 1, wherein the second light source is stacked on the first light source.

### Claim 15

A display comprising:
a first device driver;
a second device driver;
a third device driver;
a first multi-input light source having a first input terminal, a second input terminal, and a third input terminal;
a first light-source selection circuit coupled to the first device driver, the second device driver, the third device driver, the first input terminal of the first multi-input light source, the second input terminal of the first multi-input light source, and the third input terminal of the first multi-input light source;
wherein the first light-source selection circuit is configured to pair the first device driver with the first input terminal of the first multi-input light source during a first time interval;
wherein the first light-source selection circuit is configured to pair the first device driver with the second input terminal of the first multi-input light source during a second time interval;
wherein the first light-source selection circuit is configured to pair the first device driver with the third input terminal of the first multi-input light source during a third time interval;
wherein the first light-source selection circuit is configured to pair the second device driver with the second input terminal of the first multi-input light source during the first time interval;
wherein the first light-source selection circuit is configured to pair the second device driver with the third input terminal of the first multi-input light source during the second time interval;
wherein the first light-source selection circuit is configured to pair the second device driver with the first input terminal of the first multi-input light source during the third time interval;
wherein the first light-source selection circuit is configured to pair the third device driver with the third input terminal of the first multi-input light source during the first time interval;
wherein the first light-source selection circuit is configured to pair the third device driver with the first input terminal of the first multi-input light source during the second time interval; and
wherein the first light-source selection circuit is configured to pair the third device driver with the second input terminal of the first multi-input light source during the third time interval.

### Claim 16 (depends on 15)

The display of claim 15, wherein:
the first time interval is a first sub-period of a frame time period;
the second time interval is a second sub-period of the frame time period; and
the third time interval is a third sub-period of the frame time period.

### Claim 17 (depends on 15)

The display of claim 15, further comprising:
a fourth device driver;
a second multi-input light source having a first input terminal, a second input terminal, and a third input terminal; and
a second light-source selection circuit coupled to the fourth device driver, the first input terminal of the second multi-input light source, the second input terminal of the second multi-input light source, and the third input terminal of the third multi-input light source.

### Claim 18

A display comprising:
a first device driver;
a second device driver;
a third device driver;
a first multi-input light source having a first input terminal, a second input terminal, and a third input terminal;
a second multi-input light source having a first input terminal, a second input terminal, and a third input terminal;
a third multi-input light source having a first input terminal, a second input terminal, and a third input terminal;
a first light-source selection circuit coupled to the first device driver, the second device driver, the third device driver, the first input terminal of the first multi-input light source, the first input terminal of the second multi-input light source, the first input terminal of the third multi-input light source, the second input terminal of the first multi-input light source, the second input terminal of the second multi-input light source, the second input terminal of the third multi-input light source, the third input terminal of the first multi-input light source, the third input terminal of the second multi-input light source, and the third input terminal of the third multi-input light source;
wherein the first light-source selection circuit is configured to pair the first device driver with the first input terminal of the first multi-input light source during a first time interval;
wherein the first light-source selection circuit is configured to pair the first device driver with the first input terminal of the second multi-input light source during a second time interval;
wherein the first light-source selection circuit is configured to pair the first device driver with the first input terminal of the third multi-input light source during a third time interval; and
wherein the first light-source selection circuit is configured to pair the first device driver with the second input terminal of the first multi-input light source, the second input terminal of the second multi-input light source, the second input terminal of the third multi-input light source, the third input terminal of the first multi-input light source, the third input terminal of the second multi-input light source, and the third input terminal of the third multi-input light source during a fourth time interval, a fifth time interval, the sixth time interval, a seventh time interval, an eighth time interval, and a ninth time interval, respectively.

### Claim 19 (depends on 18)

The display of claim 18:
wherein the first light-source selection circuit is configured to pair the second device driver with the second input terminal of the first multi-input light source during the first time interval;
wherein the first light-source selection circuit is configured to pair the second device driver with the second input terminal of the second multi-input light source during the second time interval; and
wherein the first light-source selection circuit is configured to pair the second device driver with the second input terminal of the third multi-input light source during the third time interval.

### Claim 20 (depends on 19)

The display of claim 19:
wherein the first light-source selection circuit is configured to pair the third device driver with the third input terminal of the first multi-input light source during the first time interval;
wherein the first light-source selection circuit is configured to pair the third device driver with the third input terminal of the second multi-input light source during the second time interval; and
wherein the first light-source selection circuit is configured to pair the third device driver with the third input terminal of the third multi-input light source during the third time interval.

### Claim 21 (depends on 18)

The display of claim 18,
wherein the first light-source selection circuit is configured to pair the second device driver with the first input terminal of the first multi-input light source, the first input terminal of the second multi-input light source, the first input terminal of the third multi-input light source, second input terminal of the first multi-input light source, the second input terminal of the second multi-input light source, the second input terminal of the third multi-input light source, the third input terminal of the first multi-input light source, the third input terminal of the second multi-input light source, and the third input terminal of the third multi-input light source during the seventh time interval, the eighth time interval, the ninth time interval, the first time interval, the second time interval, the third time interval, the fourth timer interval, the fifth time interval, and the sixth time interval, respectively; and
wherein the first light-source selection circuit is configured to pair the third device driver with the first input terminal of the first multi-input light source, the first input terminal of the second multi-input light source, the first input terminal of the third multi-input light source, second input terminal of the first multi-input light source, the second input terminal of the second multi-input light source, the second input terminal of the third multi-input light source, the third input terminal of the first multi-input light source, the third input terminal of the second multi-input light source, and the third input terminal of the third multi-input light source during the fourth timer interval, the fifth time interval, the sixth time interval, the seventh time interval, the eighth time interval, the ninth time interval, the first time interval, the second time interval, and the third time interval, respectively.

### Claim 22 (depends on 18)

The display of claim 18,
wherein the first light-source selection circuit is configured to pair the second device driver with the first input terminal of the first multi-input light source, the first input terminal of the second multi-input light source, the first input terminal of the third multi-input light source, second input terminal of the first multi-input light source, the second input terminal of the second multi-input light source, the second input terminal of the third multi-input light source, the third input terminal of the first multi-input light source, the third input terminal of the second multi-input light source, and the third input terminal of the third multi-input light source during the sixth time interval, the seventh time interval, the eighth time interval, the ninth time interval, the first time interval, the second time interval, the third time interval, the fourth timer interval, and the fifth time interval, respectively; and
wherein the first light-source selection circuit is configured to pair the third device driver with the first input terminal of the first multi-input light source, the first input terminal of the second multi-input light source, the first input terminal of the third multi-input light source, second input terminal of the first multi-input light source, the second input terminal of the second multi-input light source, the second input terminal of the third multi-input light source, the third input terminal of the first multi-input light source, the third input terminal of the second multi-input light source, and the third input terminal of the third multi-input light source during the second time interval, the third time interval, the fourth timer interval, the fifth time interval, the sixth time interval, the seventh time interval, the eighth time interval, the ninth time interval, and the first time interval, respectively.

### Claim 23 (depends on 1)

The embodiment of claim 1, wherein the first light source is a first variance selectable light source and the second light source is a second variance selectable light source.