CN-122024637-A - Display device and electronic device including the same

Abstract

The present application relates to a display device and an electronic device including the display device. The display device includes a display panel including pixels, a gate driver configured to output gate signals to the pixels, a data driver configured to apply data voltages to the display panel, a voltage output configured to apply gate high voltages and gate low voltages to the gate driver, and a driving controller configured to control the gate driver, the data driver, and the voltage output. The gate signal is generated based on a gate high voltage and a gate low voltage. The driving controller controls a driving frequency of the display panel. The gate low voltage is generated based on a predetermined power voltage. The generation period of the predetermined power voltage is controlled based on the drive frequency.

Inventors

• JIN XUANXIU
• PEI YINGMIN
• Pei Yunji

Assignees

• 三星显示有限公司

Dates

Publication Date

20260512

Application Date

20250731

Priority Date

20241112

Claims (20)

1. 1. A display device, comprising: a display panel including pixels; a gate driver configured to output a gate signal to the pixel; A data driver configured to apply a data voltage to the display panel; a voltage follower configured to apply a gate high voltage having a first voltage level and a gate low voltage having a second voltage level lower than the first voltage level to the gate driver, and A driving controller configured to control the gate driver, the data driver, and the voltage output device, Wherein the gate signal is generated based on the gate high voltage and the gate low voltage, Wherein the driving controller controls the driving frequency of the display panel, Wherein the gate low voltage is generated based on a predetermined power voltage having a predetermined power voltage level, and Wherein a generation period of the predetermined power voltage is controlled based on the driving frequency.
2. 2. The display device according to claim 1, wherein the generation period decreases when the driving frequency is higher than a reference driving frequency.
3. 3. The display device according to claim 1, wherein the generation period increases when the driving frequency is lower than a reference driving frequency.
4. 4. The display device according to claim 1, wherein the voltage outputter comprises: A voltage generation block configured to receive an input power voltage and a cyclic control signal and output the predetermined power voltage based on the input power voltage and the cyclic control signal, and A voltage conversion block configured to output the gate low voltage based on the predetermined power voltage.
5. 5. The display device of claim 4, wherein the input power voltage comprises a first input power voltage and a second input power voltage, Wherein the voltage generation block includes: a first switching element including a first terminal receiving the first input power voltage and a second terminal connected to a first node; a second switching element including a first terminal receiving a ground voltage and a second terminal connected to a second node; a third switching element including a first terminal receiving the ground voltage and a second terminal connected to the first node; a first capacitor including a first electrode connected to the first node and a second electrode connected to the second node; a fourth switching element including a first terminal connected to the second node and a second terminal connected to a third node; a fifth switching element including a first terminal receiving the second input power voltage and a second terminal connected to the third node; A sixth switching element including a first terminal receiving the ground voltage and a second terminal connected to a fourth node; a second capacitor including a first electrode connected to the third node and a second electrode connected to the fourth node; A seventh switching element including a first terminal connected to the fourth node and a second terminal connected to a fifth node, and A third capacitor including a first electrode connected to the fifth node and a second electrode receiving the ground voltage, an Wherein the fifth node outputs the predetermined power voltage.
6. 6. The display device according to claim 5, wherein the generation section of the voltage generation block operation includes a first generation section and a second generation section, Wherein, in the first generation section, the first capacitor stores the first input power voltage, and the second capacitor stores the second input power voltage, Wherein in the second generation section, the second node and the third node are connected, and the fourth node and the fifth node are connected, and Wherein an absolute value of the predetermined power voltage is a sum of the first input power voltage and the second input power voltage.
7. 7. The display device according to claim 6, wherein the first input power voltage and the second input power voltage are positive voltages, and the predetermined power voltage is a negative voltage.
8. 8. The display device of claim 6, wherein the generation period is a length of the generation section, and Wherein the length of the generation section is changed based on the driving frequency.
9. 9. The display device according to claim 8, wherein the length of the generation section decreases when the driving frequency increases.
10. 10. The display device according to claim 8, wherein the length of the generation section increases when the driving frequency decreases.
11. 11. The display device according to claim 1, wherein the driving frequency includes a first driving frequency and a second driving frequency higher than the first driving frequency, Wherein the frame period of the first driving frequency includes an active period for applying the data voltage and a blanking period for stopping applying the data voltage, Wherein the frame period of the second driving frequency includes the activation period, and Wherein the generation period has a first generation period in the activation period and the generation period has a second generation period longer than the first generation period in the blanking period.
12. 12. The display device of claim 11, wherein in the active period, an active signal has an active level and in the blanking period, the active signal has a inactive level, Wherein the generation period has the first generation period when the activation signal has the activation level, an Wherein the generation period has the second generation period when the activation signal has the deactivation level.
13. 13. The display device of claim 11, wherein in the active period, an active signal has an active level and in the blanking period, the active signal has a inactive level, Wherein the frame period of the first driving frequency includes a first period, a second period, a third period, and a fourth period, Wherein in the first period, the activation signal has the activation level, and the generation period is the second generation period, Wherein in the second period after the first period, the activation signal has the activation level, and the generation period is the first generation period, Wherein in the third period after the second period, the activation signal has the deactivation level, and the generation period is the first generation period, and Wherein in the fourth period after the third period, the activation signal has the deactivation level, and the generation period is the second generation period.
14. 14. A display device, comprising: a display panel including pixels; a gate driver configured to output a gate signal to the pixel; A data driver configured to apply a data voltage to the display panel; A voltage follower configured to apply a gate high voltage and a gate low voltage to the gate driver, and A driving controller configured to control the gate driver, the data driver, and the voltage output device, Wherein the gate signal is generated based on the gate high voltage and the gate low voltage, Wherein the frame period for driving the pixel includes an active period for applying the data voltage to the pixel and a blanking period for stopping the application of the data voltage, Wherein, in the activation period, a predetermined power voltage having a predetermined power voltage level is generated in a first generation period, and Wherein the predetermined power voltage is generated in a second generation period longer than the first generation period in the blanking period.
15. 15. The display device according to claim 14, wherein the voltage outputter comprises: A voltage generation block configured to receive an input power voltage and a cyclic control signal and output the predetermined power voltage based on the input power voltage and the cyclic control signal, and A voltage conversion block configured to output the gate low voltage based on the predetermined power voltage.
16. 16. The display device of claim 15, wherein the input power voltage comprises a first input power voltage and a second input power voltage, Wherein the voltage generation block includes: a first switching element including a first terminal receiving the first input power voltage and a second terminal connected to a first node; a second switching element including a first terminal receiving a ground voltage and a second terminal connected to a second node; a third switching element including a first terminal receiving the ground voltage and a second terminal connected to the first node; a first capacitor including a first electrode connected to the first node and a second electrode connected to the second node; a fourth switching element including a first terminal connected to the second node and a second terminal connected to a third node; a fifth switching element including a first terminal receiving the second input power voltage and a second terminal connected to the third node; A sixth switching element including a first terminal receiving the ground voltage and a second terminal connected to a fourth node; a second capacitor including a first electrode connected to the third node and a second electrode connected to the fourth node; A seventh switching element including a first terminal connected to the fourth node and a second terminal connected to a fifth node, and A third capacitor including a first electrode connected to the fifth node and a second electrode receiving the ground voltage, an Wherein the fifth node outputs the predetermined power voltage.
17. 17. The display device of claim 16, wherein the generation section of the voltage generation block operation includes a first generation section and a second generation section, Wherein, in the first generation section, the first capacitor stores the first input power voltage, and the second capacitor stores the second input power voltage, Wherein in the second generation section, the second node and the third node are connected, and the fourth node and the fifth node are connected, and Wherein an absolute value of the predetermined power voltage is a sum of the first input power voltage and the second input power voltage.
18. 18. The display device according to claim 17, wherein the first input power voltage and the second input power voltage are positive voltages, and the predetermined power voltage is a negative voltage.
19. 19. The display device of claim 14, wherein the frame period comprises a first period, a second period, a third period, and a fourth period, Wherein in the first period, the activation signal has an activation level, and the generation period of the predetermined power voltage is the second generation period, Wherein in the second period after the first period, the activation signal has the activation level, and the generation period is the first generation period, Wherein in the third period after the second period, the activation signal has a deactivation level, and the generation period is the first generation period, and Wherein in the fourth period after the third period, the activation signal has the deactivation level, and the generation period is the second generation period.
20. 20. An electronic device, comprising: a display panel including pixels; a gate driver configured to output a gate signal to the pixel; A data driver configured to apply a data voltage to the display panel; A voltage follower configured to apply a gate high voltage and a gate low voltage to the gate driver; A drive controller configured to control the gate driver, the data driver, and the voltage output based on an input control signal, and A processor configured to output the input control signal to the drive controller, Wherein the gate signal is generated based on the gate high voltage and the gate low voltage, Wherein the driving controller controls the driving frequency of the display panel, Wherein the gate low voltage is generated based on a predetermined power voltage having a predetermined power voltage level, and Wherein a generation period of the predetermined power voltage is controlled based on the driving frequency.

Description

Display device and electronic device including the same Technical Field Embodiments of the inventive concept relate to a display device and an electronic device. More particularly, embodiments of the inventive concept relate to a display device and an electronic device having reduced power consumption. Background In general, a display device includes a display panel and a display panel driver. The display panel includes a plurality of gate lines, a plurality of data lines, a plurality of emission lines, and a plurality of pixels. The display panel driver includes a gate driver supplying a gate signal to the gate line, a data driver supplying a data voltage to the data line, an emission driver supplying an emission signal to the emission line, and a driving controller controlling the gate driver, the data driver, and the emission driver. Disclosure of Invention In general, when a charge pump circuit for generating a relatively low power voltage is operated, power consumption of the display device may be increased. Embodiments of the inventive concept provide a display device having reduced power consumption. Embodiments of the inventive concept also provide an electronic device having reduced power consumption. In an embodiment of the present disclosure, a display device may include a display panel including pixels, a gate driver configured to output gate signals to the pixels, a data driver configured to apply data voltages to the display panel, a voltage output configured to apply a gate high voltage having a first voltage level and a gate low voltage having a second voltage level lower than the first voltage level to the gate driver, and a driving controller configured to control the gate driver, the data driver, and the voltage output. The gate signal may be generated based on a gate high voltage and a gate low voltage. The driving controller may control a driving frequency of the display panel. The gate low voltage may be generated based on a predetermined power voltage having a predetermined power voltage level. The generation period of the predetermined power voltage may be controlled based on the driving frequency. In an embodiment, the generation period may be reduced when the driving frequency is higher than the reference driving frequency. In an embodiment, the generation period may be increased when the driving frequency is lower than the reference driving frequency. In an embodiment, the voltage follower may include a voltage generation block configured to receive an input power voltage and a cyclic control signal and to output a predetermined power voltage based on the input power voltage and the cyclic control signal, and a voltage conversion block configured to output a gate low voltage based on the predetermined power voltage. In an embodiment, the input power voltage may include a first input power voltage and a second input power voltage. The voltage generation block may include a first switching element including a first terminal receiving a first input power voltage and a second terminal connected to a first node, a second switching element including a first terminal receiving a ground voltage and a second terminal connected to a second node, a third switching element including a first terminal receiving the ground voltage and a second terminal connected to the first node, a first capacitor including a first electrode connected to the first node and a second electrode connected to the second node, a fourth switching element including a first terminal connected to the second node and a second terminal connected to the third node, a fifth switching element including a first terminal receiving the second input power voltage and a second terminal connected to the third node, a sixth switching element including a first terminal receiving the ground voltage and a second terminal connected to the fourth node, a second capacitor including a first electrode connected to the third node and a second electrode connected to the fourth node, a seventh switching element including a first terminal connected to the fourth node and a second electrode connected to the fifth node, and a fifth electrode connected to the third node, and a fifth switching element including a fifth electrode connected to the fourth node and a fifth electrode connected to the ground. The fifth node may output a predetermined power voltage. In an embodiment, the generation section of the voltage generation block operation may include a first generation section and a second generation section. In the first generation section, the first capacitor may store a first input power voltage, and the second capacitor may store a second input power voltage. In the second generation section, the second node and the third node may be connected, and the fourth node and the fifth node may be connected. The absolute value of the predetermined power voltage may be a sum of the first input power voltage and the second input power voltage. In an em