US-12626646-B2 - Display driving device comprising an emission circuit and positive feedback circuit and display driving method

US12626646B2US 12626646 B2US12626646 B2US 12626646B2US-12626646-B2

Abstract

A display driving device includes an emission circuit and a positive feedback circuit. The emission circuit is coupled to a first node. The emission circuit emits light according to a forward signal, a reverse signal, and a voltage level of the first node. The forward signal and the reverse signal are inversed phase of each other. The positive feedback circuit discharges the first node according to sweep signal.

Inventors

Chih-Lung Lin
Cheng-Han Ke
Jui-Hung Chang
Ming-Yang Deng
Chia-Tien Peng

Assignees

AUO Corporation

Dates

Publication Date: 20260512
Application Date: 20241029
Priority Date: 20231108

Claims (12)

1 . A display driving device, comprising: an emission circuit coupled to a first node and configured to emit light based on a forward signal, a reverse signal, and a voltage level of the first node, wherein the emission circuit comprises a first capacitor comprising a first terminal and a second terminal; and a positive feedback circuit configured to discharge the first node based on a sweep signal, wherein the positive feedback circuit comprises a second capacitor comprising a third terminal and a fourth terminal; wherein the forward signal and the reverse signal are inversed phase of each other; wherein the emission circuit modifies a voltage level of the first terminal and a voltage level of the second terminal based on a first reference signal and a first data signal during a first period; wherein the positive feedback circuit modifies a voltage level of the third terminal and a voltage level of the fourth terminal based on a second reference signal and the first reference signal during the first period; wherein a voltage level of the second reference signal is greater than a voltage level of the first reference signal.
2 . The display driving device of claim 1 , wherein the emission circuit comprises: a first transistor; and a third capacitor coupled to the first transistor and configured to receive the first reference signal; wherein a control terminal of the first transistor is coupled to the first node, and a fifth terminal of the first transistor is coupled to the first capacitor and the third capacitor; wherein the first node is configured to receive the sweep signal.
3 . The display driving device of claim 2 , wherein the positive feedback circuit comprises: a second transistor configured to provide the sweep signal to the first node; and a fourth capacitor coupled to a second node; wherein a control terminal of the second transistor is coupled to the second node; wherein the positive feedback circuit discharges the first node based on the sweep signal and a voltage level of the second node.
4 . The display driving device of claim 1 , wherein the emission circuit further comprises a driving transistor, and the driving transistor has a first threshold voltage level; wherein the positive feedback circuit further comprises a control transistor, and the control transistor has a second threshold voltage level; wherein the emission circuit modifies the voltage level of the first terminal based on the second reference signal and the first threshold voltage level during a second period; wherein the positive feedback circuit modifies the voltage level of the third terminal based on a second data signal and the second threshold voltage level during the second period.
5 . The display driving device of claim 4 , wherein the control transistor of the positive feedback circuit is turned off based on the voltage level of the third terminal during a third period.
6 . The display driving device of claim 5 , wherein the control transistor comprises a fifth terminal; wherein the positive feedback circuit modifies a voltage level of the fifth terminal based on a voltage variation level of the sweep signal during a fourth period.
7 . The display driving device of claim 6 , wherein the positive feedback circuit modifies the voltage level of the third terminal and the voltage level of the fourth terminal based on the second reference signal during a fifth period; wherein the control transistor of the positive feedback circuit is turned on based on the voltage level of the third terminal, and a switch of the emission circuit is turned on based on the voltage variation level of the sweep signal; wherein a light emitter of the emission circuit has a voltage level of the light emitter; wherein the emission circuit modifies the voltage level of the first terminal and the voltage level of the second terminal based on a power supply signal and the voltage level of the light emitter, wherein the driving transistor outputs a driving signal based on the voltage level of the first terminal, and the light emitter emits light based on the driving signal during the fifth period.
8 . The display driving device of claim 7 , wherein the emission circuit modifies the voltage level of the first terminal and the voltage level of the second terminal based on the first data signal during a sixth period; wherein the positive feedback circuit modifies the voltage level of the third terminal and the voltage level of the fourth terminal based on the first reference signal during the sixth period.
9 . A display driving method, comprising: emitting light based on a forward signal, a reverse signal, and a voltage level of a first node by an emission circuit; wherein the emission circuit is coupled to the first node, wherein a positive feedback circuit comprises a second node, and the first node and the second node are different from each other; discharging the first node based on a sweep signal by the positive feedback circuit; wherein the forward signal and the reverse signal are inversed phase of each other; modifying, by the emission circuit, a voltage level of a first terminal of a first capacitor in the emission circuit and a voltage level of a second terminal of the first capacitor in the emission circuit based on a first reference signal and a first data signal during a first period; and modifying, by the positive feedback circuit, a voltage level of a third terminal of a second capacitor in the positive feedback circuit and a voltage level of a fourth terminal of the second capacitor in the positive feedback circuit based on a second reference signal and the first reference signal during the first period; wherein a voltage level of the second reference signal is greater than a voltage level of the first reference signal.
10 . The display driving method of claim 9 , further comprising: receiving the sweep signal by the first node.
11 . The display driving method of claim 9 , further comprising: providing the sweep signal to the first node by a transistor of the positive feedback circuit.
12 . The display driving method of claim 11 , further comprising: discharging the first node based on the sweep signal and a voltage level of the second node by the positive feedback circuit; wherein a control terminal of the transistor is coupled to the second node.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Taiwan Application Serial Number 112143089, filed Nov. 8, 2023, which is herein incorporated by reference in its entirety. BACKGROUND Field of Invention This case relate to a driving device and a driving method, and in particular to a display driving device and a display driving method. Description of Related Art Currently, in order to achieve high brightness uniformity, a display uses a multi-emission design structure to emit light and modifies a gray scale of the display. However, the aforementioned design structure has conditions such as the need to increase a driving crossing voltage, longer raising time and falling time, etc., resulting in an increase in the power of the display. Therefore, how to design to solve the above problems is an important issue in this field. SUMMARY The Invention content is intended to provide a simplified summary of this disclosure to provide the reader with a basic understanding of this disclosure. The Invention content is not a complete summary of this disclosure and is not intended to point out important/critical components of this embodiment or to define the scope of this case. One of the technical patterns in this case relates to a display driving device. The display driving device includes an emission circuit and a positive feedback circuit. The emission circuit is coupled to a first node. The emission circuit emits light based on a forward signal, a reverse signal, and a voltage level of the first node. The forward signal and the reverse signal are inversed phase of each other. The positive feedback circuit discharges the first node based on a sweep signal. One of the technical patterns in this case relates to a display driving method. The display driving method includes the following operations: emitting light based on the forward signal, the reverse signal, and the voltage level of the first node by the emission circuit, and discharging the first node based on the sweep signal by the positive feedback circuit. The emission circuit is coupled to the first node, the positive feedback circuit includes a second node, and the first node and the second node are different from each other. The forward signal and the reverse signal are inversed phase of each other. Therefore, according to the technical content of this case, the display driving device and the display driving method as shown in the embodiments of this case can raise the voltage level of the node with a control circuit and the positive feedback circuit to accelerate a turning on time and reduce the raising time of the emission current. The basic spirit and other purposes of the invention, as well as the technical means and manner of implementation adopted herein, can be readily understood by the people having ordinary skill in the art, by reference to the manner of implementation set forth below. BRIEF DESCRIPTION OF THE DRAWINGS In order to above and other purposes, features, advantages, and embodiments more readily apparent and understandable, illustrations of accompanying drawings are as follows: FIG. 1 illustrates a diagram of a display driving device, in accordance with one embodiment of a present disclosure. FIG. 2 illustrates a detailed circuit diagram of the display driving device, in accordance with one embodiment of the present disclosure. FIG. 3 illustrates a timing diagram of a plurality of signals of the display driving device, in accordance with one embodiment of the present disclosure. FIG. 4 illustrates a timing diagram of the plurality of signals of the display driving device, in accordance with one embodiment of the present disclosure. FIG. 5 illustrates a using context diagram of the display driving device, in accordance with one embodiment of the present disclosure. FIG. 6 illustrates a using context diagram of the display driving device, in accordance with one embodiment of the present disclosure. FIG. 7 illustrates a using context diagram of the display driving device, in accordance with one embodiment of the present disclosure. FIG. 8 illustrates a using context diagram of the display driving device, in accordance with one embodiment of the present disclosure. FIG. 9 illustrates a using context diagram of the display driving device, in accordance with one embodiment of the present disclosure. FIG. 10 illustrates a using context diagram of the display driving device, in accordance with one embodiment of the present disclosure. FIG. 11 illustrates a flow chart of operations of the display driving method, in accordance with one embodiment of the present disclosure. In accordance with customary practice, the various features and components in the drawings are not drawn to scale and are drawn in such a way as to best present the specific features and components relevant to this case. In addition, the same or similar component symbols are used to refer to similar components/parts between drawings. DETAILED DESCRIPTION Fo