IP Library Granted Patent US 12690272
Granted Patent B2
US 12690272 · App. 17/863,418 · Granted Jul 21, 2026

Electronic device

Inventors: Ming-Chun Tseng (Miao-Li County, TW); Kung-Chen Kuo (Miao-Li County, TW); Lien-Hsiang Chen (Miao-Li County, TW); Yong-Zhi Liu (Miao-Li County, TW)
Assignee: Innolux Corporation
H10D89/811H10D89/611
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Quick Facts
Patent No.
US 12690272
App. No.
17/863,418
Granted
Jul 21, 2026
Kind
B2
Abstract

An electronic device is provided. The electronic device includes a driving transistor, a semiconductor unit and an electrostatic discharge protection (EDP) circuit. The semiconductor unit has a first terminal coupled to a first terminal of the driving transistor. The EDP circuit is coupled to a node between the first terminal of the driving transistor and the first terminal of the semiconductor unit.

Claims (34)

1 . An electronic device, comprising:

a driving transistor, having a first terminal and a second terminal;

a semiconductor unit, having a first terminal and a second terminal; and

an electrostatic discharge protection circuit, coupled to a first node between the first terminal of the driving transistor and the first terminal of the semiconductor unit, and further coupled to the second terminal of the semiconductor unit and coupled to the second terminal of the driving transistor at a second node,

wherein a first charge electrostatic current is configured to flow from the first node through a first diode in the electrostatic discharge protection circuit, and a second charge electrostatic current is configured to flow from the second node through a second diode in the electrostatic discharge protection circuit.

2 . The electronic device according to claim 1 , wherein the first terminal of the driving transistor outputs a driving current to the semiconductor unit to drive the semiconductor unit.

3 . The electronic device according to claim 1 , further comprising:

a switching transistor, having a first terminal coupled to the first terminal of the semiconductor unit, wherein a second terminal of the switching transistor is coupled to the first terminal of the driving transistor.

4 . The electronic device according to claim 3 , wherein a control terminal of the driving transistor is coupled to a data signal, and a control terminal of the switching transistor is coupled to a switching signal.

5 . The electronic device according to claim 1 , wherein the second terminal of the driving transistor is coupled to a first voltage, and the second terminal of the semiconductor unit is coupled to a second voltage, wherein a voltage level of the first voltage is higher than a voltage level of the second voltage.

6 . The electronic device according to claim 5 , wherein the electrostatic discharge protection circuit comprises:

at least one electronic element, having a first terminal coupled to the first node.

7 . The electronic device according to claim 6 , wherein a second terminal of the at least one electronic element is coupled to the second voltage.

8 . The electronic device according to claim 5 , wherein the electrostatic discharge protection circuit comprises:

the first diode, having a first terminal coupled to the first node, wherein a second terminal of the first diode is coupled to the second voltage; and

the second diode, having a first terminal coupled to the second terminal of the driving transistor, wherein a second terminal of the second diode is coupled to the second voltage.

9 . The electronic device according to claim 1 , further comprising:

a capacitor; and

a reset circuit, having a plurality of first terminals respectively coupled to a first terminal and a second terminal of the capacitor, wherein the second terminal of the capacitor is further coupled to a control terminal of the driving transistor.

10 . The electronic device according to claim 9 , wherein the reset circuit further comprises:

a fourth transistor, having a first terminal coupled to the first terminal of the capacitor, wherein a second terminal of the fourth transistor is coupled to a reference voltage, and a control terminal of the fourth transistor is coupled to a first control voltage; and

a fifth transistor, having a first terminal coupled to the second terminal of the capacitor, wherein a second terminal of the fifth transistor is coupled to a reset voltage, and a control terminal of the fifth transistor is coupled to the first control voltage.

11 . The electronic device according to claim 9 , further comprising:

a writing and compensation circuit, having a first terminal coupled to the first terminal of the capacitor, wherein a plurality of second terminals of the writing and compensation circuit are respectively coupled to the first node and the control terminal of the driving transistor.

12 . The electronic device according to claim 11 , wherein the writing and compensation circuit further comprises:

a sixth transistor, having a first terminal coupled to the first terminal of the capacitor, wherein a second terminal of the sixth transistor is coupled to a data signal, and a control terminal of the sixth transistor is coupled to a second control voltage; and

a seventh transistor, having a first terminal coupled to the first terminal of the driving transistor at the first node, wherein a second terminal of the seventh transistor is coupled to the second terminal of the capacitor and the control terminal of the driving circuit, and a control terminal of the seventh transistor is coupled to the second control voltage.

13 . The electronic device according to claim 11 , further comprising:

a voltage regulator circuit, having a first terminal coupled to the control terminal of the driving transistor, wherein a second terminal of the voltage regulator circuit is coupled to the second terminal of the driving transistor and a first voltage.

14 . The electronic device according to claim 13 , further comprising:

a second switching transistor, having a first terminal coupled to the first terminal of the capacitor and the first terminal of the writing and compensation circuit, wherein a second terminal of the second switching transistor is coupled to a reference voltage, and a control terminal of the second switching transistor is coupled to a switching signal.

15 . The electronic device according to claim 14 , wherein the driving transistor, the semiconductor unit, the reset circuit, the capacitor, the writing and compensation circuit, the voltage regulator circuit, and the second switching transistor are disposed in a pixel display area.

16 . The electronic device according to claim 15 , wherein the electrostatic discharge protection circuit is disposed in the pixel display area, or disposed in a peripheral area outside the pixel display area.

17 . The electronic device according to claim 1 , wherein the semiconductor unit comprises a light-emitting diode.