US-12626647-B2 - Display driving device and display driving method

Abstract

A display driving device includes a light emitting circuit, a control circuit, and a boost circuit. The light emitting circuit is coupled to a first node. The light emitting circuit is configured to emit according to a first emission signal, a second emission signal, and a voltage level at the first node. The control circuit is coupled to a second node. The control circuit is configured to charge the second node according to a sweep signal and the first emission signal. The boost circuit is configured to boost and charge a voltage level at the second node to the first node. The voltage level at the first node is greater than the voltage level at the second node.

Inventors

• Chih-Lung Lin
• Cheng-Rui Lu
• Cheng-Han Ke
• Ming-Yang Deng
• Chia-Tien Peng

Assignees

• AUO Corporation

Dates

Publication Date

20260512

Application Date

20241030

Priority Date

20231107

Claims (18)

1. 1 . A display driving device, comprising: a light-emitting circuit, coupled to a first node, and configured to emit light based on a first light-emitting signal and a voltage level at the first node; and a control circuit, coupled to a second node, and configured to charge the second node based on a sweep signal and the first light-emitting signal; and a boost circuit, configured to boost a voltage level at the second node and charge the first node; and wherein the voltage level at the first node is greater than the voltage level at the second node, wherein the light-emitting circuit comprises a first capacitor, wherein the control circuit comprises a second capacitor, wherein the boost circuit comprises a third capacitor; wherein the first capacitor comprises a first terminal and a second terminal, wherein the second capacitor comprises a third terminal, wherein the third capacitor comprises a fourth terminal and a fifth terminal; wherein during a first period, the light-emitting circuit adjusts a voltage level at the first terminal and a voltage level at the second terminal based on a first data signal and a charging signal; wherein during the first period, the control circuit adjusts a voltage level at the third terminal based on a first pull-down signal; wherein during the first period, the boost circuit adjusts a voltage level at the fourth terminal and a voltage level at the fifth terminal based on the first pull-down signal and a second pull-down signal; and wherein a voltage level at the first pull-down signal is greater than a voltage level at the second pull-down signal.
2. 2 . The display driving device of claim 1 , wherein the boost circuit is further configured to discharge the first node and the second node based on a second light-emitting signal.
3. 3 . The display driving device of claim 2 , wherein the light-emitting circuit is further configured to perform light emission based on the second light-emitting signal; and wherein the second light-emitting signal is different from the first light-emitting signal.
4. 4 . The display driving device of claim 1 , wherein the light-emitting circuit further comprises a driving transistor, wherein the driving transistor has a first threshold voltage level; wherein the control circuit further comprises a control transistor, and the control transistor has a second threshold voltage level; wherein during a second period, the light-emitting circuit adjusts the voltage level at the second terminal based on a pull-up signal and the first threshold voltage level; and wherein during the second period, the control circuit adjusts the voltage level at the third terminal based on a second data signal and the second threshold voltage level.
5. 5 . The display driving device of claim 4 , wherein during a third period, the light-emitting circuit adjusts the voltage level at the first terminal and the voltage level at the second terminal based on the pull-up signal.
6. 6 . The display driving device of claim 5 , wherein during a fourth period, the control circuit adjusts the voltage level at the third terminal based on a first voltage change level of the sweep signal; and wherein during the fourth period, the control transistor turns off based on the voltage level at the third terminal.
7. 7 . The display driving device of claim 6 , wherein during a fifth period, the control circuit adjusts the voltage level at the third terminal based on a second voltage change level of the sweep signal, and the control transistor is turned on based on the voltage level at the third terminal; wherein during the fifth period, the boost circuit adjusts the voltage level at the fourth terminal and the voltage level at the fifth terminal based on the charging signal, and a switch of the light-emitting circuit is turned on based on the voltage level at the fifth terminal; wherein a light emitter of the light-emitting circuit has a light emitter voltage level; and wherein during the fifth period, the light-emitting circuit adjusts the voltage level at the first terminal and the voltage level at the second terminal based on a power supply signal and the light emitter voltage level, and the driving transistor outputs a driving signal based on the voltage level at the second terminal, as such the light emitter emits light based on the driving signal.
8. 8 . The display driving device of claim 7 , wherein: during a sixth period, the light-emitting circuit adjusts the voltage level at the first terminal and the voltage level at the second terminal based on the first data signal; during the sixth period, the control circuit adjusts the voltage level at the third terminal based on the first pull-down signal; and during the sixth period, the boost circuit adjusts the voltage level at the fourth terminal and the voltage level at the fifth terminal based on the first pull-down signal and the second pull-down signal.
9. 9 . A display driving device, comprising: a light-emitting circuit comprising, a driving transistor, configured to control a pulse amplitude of a driving current provided to a light emitter according to a pulse amplitude modulation data voltage; and, a transistor, connected in series with the driving transistor between a trace of a power supply signal and a trace of a pull-down signal; a boost circuit, connected to a gate terminal of the transistor; and a control circuit, connected through the boost circuit to the gate terminal of the transistor, configured to control the transistor according to a pulse width modulation data voltage and a sweep signal to control a pulse width of the driving current, and wherein the boost circuit is configured to boost a voltage level at the gate terminal of the transistor when the control circuit turns on the transistor, wherein the light-emitting circuit comprises a first capacitor, wherein the control circuit comprises a second capacitor, wherein the boost circuit comprises a third capacitor; wherein the first capacitor comprises a first terminal and a second terminal, wherein the second capacitor comprises a third terminal, wherein the third capacitor comprises a fourth terminal and a fifth terminal; wherein during a first period, the light-emitting circuit adjusts a voltage level at the first terminal and a voltage level at the second terminal based on a first data signal and a charging signal; wherein during the first period, the control circuit adjusts a voltage level at the third terminal based on a first pull-down signal; wherein during the first period, the boost circuit adjusts a voltage level at the fourth terminal and a voltage level at the fifth terminal based on the first pull-down signal and a second pull-down signal; and wherein a voltage level at the first pull-down signal is greater than a voltage level at the second pull-down signal.
10. 10 . The display driving device of claim 9 , wherein the boost circuit comprising: a boost capacitor, coupled between the control circuit and the gate terminal of the transistor, configured to boost the voltage level at the gate terminal of the transistor.
11. 11 . A display driving method for driving a display driving device, wherein the display driving device comprising a light-emitting circuit, a control circuit and a boost circuit, wherein the light-emitting circuit is coupled to a first node, wherein the control circuit is coupled to a second node different from the first node, wherein the boost circuit coupled between the light-emitting circuit and the control circuit, wherein the display driving method comprises: performing light emission, by the light-emitting circuit, based on a first light-emitting signal, a second light-emitting signal, and a voltage level at the first node; charging the second node, by the control circuit, based on a sweep signal and the first light-emitting signal; and boosting a voltage level at the second node and charging the first node by the boost circuit, and wherein the voltage level at the first node is greater than the voltage level at the second node, wherein the light-emitting circuit comprises a first capacitor, wherein the control circuit comprises a second capacitor, wherein the boost circuit comprises a third capacitor, wherein the first capacitor comprises a first terminal and a second terminal, wherein the second capacitor comprises a third terminal, wherein the third capacitor comprises a fourth terminal and a fifth terminal, wherein the display driving method further comprises: during a first period, adjusting a voltage level at the first terminal and a voltage level at the second terminal, by the light-emitting circuit, based on a first data signal and a charging signal; and during the first period, adjusting a voltage level at the third terminal, by the control circuit, based on a first pull-down signal; and during the first period, adjusting a voltage level at the fourth terminal and a voltage level at the fifth terminal, by the boost circuit, based on the first pull-down signal and a second pull-down signal, and wherein a voltage level at the first pull-down signal is greater than a voltage level at the second pull-down signal.
12. 12 . The display driving method of claim 11 , further comprising: discharging the first node and the second node, by the boost circuit, based on the second light-emitting signal.
13. 13 . The display driving method of claim 12 , further comprising: performing the light emission, by the light-emitting circuit, based on the second light-emitting signal, and wherein the second light-emitting signal is different from the first light-emitting signal.
14. 14 . The display driving method of claim 11 wherein the light-emitting circuit further comprises a driving transistor, wherein the driving transistor has a first threshold voltage level, wherein the control circuit further comprises a control transistor, wherein the control transistor has a second threshold voltage level, wherein the display driving method further comprises: during a second period, adjusting the voltage level at the second terminal, by the light-emitting circuit, based on a pull-up signal and the first threshold voltage level; and during the second period, adjusting the voltage level at the third terminal, by the control circuit, based on a second data signal and the second threshold voltage level.
15. 15 . The display driving method of claim 14 , further comprising: during a third period, adjusts the voltage level at the first terminal and the voltage level at the second terminal, by the light-emitting circuit, based on the pull-up signal.
16. 16 . The display driving method of claim 15 , further comprising: during a fourth period, adjusting the voltage level at the third terminal, by the control circuit, based on a first voltage change level of the sweep signal; and during the fourth period, turning off the control transistor based on the voltage level at the third terminal.
17. 17 . The display driving method of claim 16 , wherein a light emitter of the light-emitting circuit has a light emitter voltage level, wherein the display driving method further comprises: during a fifth period, adjusting the voltage level at the third terminal, by the control circuit, based on a second voltage change level of the sweep signal, and turning on the control transistor based on the voltage level at the third terminal; during the fifth period, adjusting the voltage level at the fourth terminal and the voltage level at the fifth terminal, by the boost circuit, based on the charging signal, and turning on a switch of the light-emitting circuit based on the voltage level at the fifth terminal; and during the fifth period, adjusting the voltage level at the first terminal and the voltage level at the second terminal, by the light-emitting circuit, based on a power supply signal and the light emitter voltage level, and outputting a driving signal, by the driving transistor, based on the voltage level at the second terminal, as such the light emitter emits light based on the driving signal.
18. 18 . The display driving method of claim 17 , further comprises: during a sixth period, adjusting the voltage level at the first terminal and the voltage level at the second terminal, by the light-emitting circuit, based on the first data signal; during the sixth period, adjusting the voltage level at the third terminal, by the control circuit, based on the first pull-down signal; and during the sixth period, adjusting the voltage level at the fourth terminal and the voltage level at the fifth terminal, by the boost circuit, based on the first pull-down signal and the second pull-down signal.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Taiwan Application Serial Number 112142929, filed Nov. 7, 2023, which is herein incorporated by reference in its entirety. BACKGROUND Field of Invention The present disclosure relates to a driving device and a driving method, and more particularly to a display driving device and a display driving method. Description of Related Art Currently, in order to achieve high brightness uniformity, a display adopts a multi-emission architecture to emit light and adjust display grayscale. However, the aforementioned architecture has issues such as the need to increase the driving cross-voltage and longer raising time and falling time, leading to an increase in the power consumption of the display. Therefore, how to design a solution to address the above problems is an important issue in this field. SUMMARY The summary aims to provide a simplified overview of the present disclosure to give the reader a basic understanding. This summary is not a complete overview of the present disclosure and is not intended to highlight important/critical elements of the embodiments or define the scope of the present disclosure. One technical aspect of the present disclosure relates to a display driving device. The display driving device includes a light-emitting circuit, a control circuit, and a boost circuit. The light-emitting circuit is coupled to a first node. The light-emitting circuit is configured to emit light based on a first emission signal, a second emission signal, and the voltage level at the first node. The control circuit is coupled to a second node. The control circuit is configured to charge the second node based on a sweep signal and the first emission signal. The boost circuit is configured to boost the voltage level at the second node and charge it to the first node. The voltage level at the first node is greater than the voltage level at the second node. Another technical aspect of the present disclosure relates to a display driving device. The display driving device includes a driving transistor, a transistor, a control circuit and a boost circuit. The driving transistor is configured to control a pulse amplitude of a driving current provided to a light emitter according to a pulse amplitude modulation data voltage. The transistor is connected in series with the driving transistor between a trace of a power supply signal and a trace of a pull-down signal. The boost circuit is connected to a gate terminal of the transistor. The control circuit is connected through the boost circuit to the gate terminal of the transistor, and the control circuit is configured to control the transistor according to a pulse width modulation data voltage and a sweep signal to control a pulse width of a driving current. The boost circuit is configured to boost a voltage level at the gate terminal of the transistor when the control circuit turns on the transistor. The other technical aspect of the present disclosure relates to a display driving method for driving a display driving device. The display driving device comprising a light-emitting circuit, a control circuit and a boost circuit. The light-emitting circuit is coupled to a first node. The control circuit is coupled to a second node different from the first node. The boost circuit is coupled between the light-emitting circuit and the control circuit. The display driving method includes the following steps: emitting light by the light-emitting circuit based on the first emission signal, the second emission signal, and the voltage level at the first node; charging the second node by the control circuit based on the sweep signal and the first emission signal; and raising the voltage level at the second node and charging it to the first node by the boost circuit. The voltage level at the first node is greater than the voltage level at the second node. Therefore, according to the present disclosure, the display driving device and display driving method shown in the embodiments of the present disclosure can increase the turn-on voltage of the transistor in the light-emitting circuit through the boost circuit, allowing for operating the transistor in the linear region. It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS The invention can be more fully understood by reading the following detailed description of the embodiment, with reference made to the accompanying drawings as follows. FIG. 1 is a block diagram illustrating a display driving device according to an embodiment of the present disclosure. FIG. 2 is a detailed circuit diagram illustrating a display driving device according to an embodiment of the present disclosure. FIG. 3 is a timing level diagram of multiple signals of a display driving device according to an embodiment