# US 11,908,395 B2 · Electronic device

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- Number: US 11,908,395 B2
- Document ID: US11908395B2
- Status: Granted
- Kind: B2
- Application number: 18/107,492
- Filed: 2023-02-08
- Published: 2023-09-07
- Granted: 2024-02-20
- Earliest claimed: 2022-03-07
- Assignees: Innolux Corporation
- Applicants: InnoLux Corporation
- Inventors: Chun-Hsien Lin; Jui-Feng Ko; Geng-Fu Chang
- Web page: https://patentgrep.com/patent/US11908395B2

## CPC

- G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED]
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/3266: Details of drivers for scan electrodes
- G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)}
- G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
- G09G 2310/0202: Addressing of scan or signal lines
- G09G 2310/0267: Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
- G09G 2310/0281: Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure
- G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit
- G09G 2320/0223: Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
- G09G 2330/00: Aspects of power supply; Aspects of display protection and defect management
- G09G 2330/02: Details of power systems and of start or stop of display operation
- G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof
- 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

An electronic device including a panel, a Chip on Film and a flexible circuit board is disclosed. The panel includes a first gate driver, a switch transistor and a driving transistor. An output terminal of the switch transistor is coupled to a control terminal of the driving transistor. The first gate driver is used for receiving an AC signal and a DC signal and outputting a control signal to a control terminal of the switch transistor. The Chip on Film is electrically connected to the panel and used for transmitting a data signal to an input terminal of the switch transistor and transmitting the AC signal to the first gate driver. The flexible circuit board is electrically connected to the panel and used for transmitting a power signal to an input terminal of the driving transistor and transmitting the DC signal to the first gate driver.

## Claims

### Claim 1

An electronic device, comprising:
a panel comprising a first gate driver, a switch transistor and a driving transistor, wherein an output terminal of the switch transistor is coupled to a control terminal of the driving transistor, and the first gate driver is used for receiving an alternating current (AC) signal and a direct current (DC) signal and outputting a control signal to a control terminal of the switch transistor according to the AC signal and the DC signal;
a Chip on Film electrically connected to the panel, wherein the Chip on Film is used for transmitting a data signal to an input terminal of the switch transistor and transmitting the AC signal to the first gate driver; and
a flexible circuit board electrically connected to the panel, wherein the flexible circuit board is used for transmitting a power signal to an input terminal of the driving transistor and transmitting the DC signal to the first gate driver.

### Claim 2 (depends on 1)

The electronic device according to claim 1, further comprising a first circuit board electrically connected to the Chip on Film, wherein the first circuit board is used for providing the AC signal and transmitting the AC signal to the first gate driver through the Chip on Film.

### Claim 3 (depends on 1)

The electronic device according to claim 1, wherein the Chip on Film comprises a driving chip, and the driving chip is used for providing the data signal.

### Claim 4 (depends on 1)

The electronic device according to claim 1, further comprising a second circuit board electrically connected to the flexible circuit board, wherein the second circuit board is used for providing the power signal and transmitting the power signal to the input terminal of the driving transistor through the flexible circuit board.

### Claim 5 (depends on 4)

The electronic device according to claim 4, wherein the second circuit board is used for providing the DC signal and transmitting the DC signal to the first gate driver through the flexible circuit board.

### Claim 6 (depends on 1)

The electronic device according to claim 1, wherein the AC signal comprises a start signal, and the first gate driver comprises a plurality of shift registers, wherein one of the plurality of shift registers receives the start signal, and the one of the plurality of shift registers is closer to the Chip on Film than the other shift registers of the plurality of shift registers.

### Claim 7 (depends on 1)

The electronic device according to claim 1, wherein the flexible circuit board is used for transmitting another AC signal to the first gate driver, and the another AC signal is a start signal.

### Claim 8 (depends on 7)

The electronic device according to claim 7, wherein the first gate driver comprises a plurality of shift registers, wherein one of the plurality of shift registers receives the another AC signal, and the one of the plurality of shift registers is closer to the flexible circuit board than the other shift registers of the plurality of shift registers.

### Claim 9 (depends on 1)

The electronic device according to claim 1, wherein the Chip on Film and the flexible circuit board are respectively disposed on opposite two sides of the panel.

### Claim 10 (depends on 1)

The electronic device according to claim 1, wherein the panel further comprises a light-emitting element, and an output terminal of the driving transistor is coupled to the light-emitting element, so that the light-emitting element receives the power signal transmitted from the flexible circuit board.

### Claim 11 (depends on 10)

The electronic device according to claim 10, wherein the panel further comprises a second gate driver and a light-emitting transistor, the output terminal of the driving transistor is coupled to an input terminal of the light-emitting transistor, and an output terminal of the light-emitting transistor is coupled to the light-emitting element, wherein the second gate driver is used for receiving another AC signal and another DC signal and outputting another control signal to a control terminal of the light-emitting transistor according to the another AC signal and the another DC signal.

### Claim 12 (depends on 11)

The electronic device according to claim 11, wherein the Chip on Film transmits the another AC signal to the second gate driver, and the flexible circuit board transmits the another DC signal to the second gate driver.

### Claim 13 (depends on 10)

The electronic device according to claim 10, wherein the panel further comprises a test circuit coupled to the light-emitting element for controlling the light-emitting element to be turned on.

### Claim 14 (depends on 1)

The electronic device according to claim 1, wherein the AC signal comprises one of a clock signal, a start signal and a reset signal.

### Claim 15 (depends on 1)

The electronic device according to claim 1, wherein the DC signal comprises one of a gate high voltage and a gate low voltage.

### Claim 16 (depends on 1)

The electronic device according to claim 1, wherein the panel further comprises a scan line, and the first gate driver transmits the control signal to the control terminal of the switch transistor through the scan line.

### Claim 17 (depends on 1)

The electronic device according to claim 1, wherein the panel further comprises a data line, and the Chip on Film transmits the data signal to the input terminal of the switch transistor through the data line.

### Claim 18 (depends on 1)

The electronic device according to claim 1, wherein the panel further comprises another first gate driver, and the another first gate driver and the first gate driver are located at two different sides of the panel and are driven at the same time.

### Claim 19 (depends on 1)

The electronic device according to claim 1, wherein the panel further comprises another first gate driver, the another first gate driver and the first gate driver are located at two different sides of the panel and are driven independently.

### Claim 20 (depends on 1)

The electronic device according to claim 1, wherein the panel has a working region and a peripheral region adjacent to the working region, the first gate driver is disposed in the peripheral region, and the switch transistor and the driving transistor are disposed in the working region.