CN-121999713-A - Electronic device

Abstract

An electronic device includes a signal controller and a light emission control circuit. The plurality of clock signals includes a first clock signal having a first frequency and a second clock signal having a second frequency lower than the first frequency. The signal controller outputs a first clock signal in a first mode, and the light emission control circuit outputs a first light emission control signal having a first on-duration in the first mode. The signal controller outputs a second clock signal in a second mode, and the light emission control circuit outputs a second light emission control signal having a second on-duration in the second mode. The first on-duration has a pulse width equal to the period of the first clock signal and the second on-duration has a pulse width equal to the period of the second clock signal.

Inventors

• LI SHIXIAN
• Jin Guixuan
• LI XIANHUA
• ZHENG JINGXUN

Assignees

• 三星显示有限公司

Dates

Publication Date

20260508

Application Date

20251022

Priority Date

20241104

Claims (20)

1. 1. An electronic device, comprising: a display panel that displays an image and includes pixels including light emitting elements and pixel circuits electrically connected to the light emitting elements; A signal controller for determining the operation mode of the display panel and outputting a plurality of clock signals, and A light emission control circuit that receives the plurality of clock signals and outputs a light emission control signal having a turn-on duration for controlling transmission of a current supplied to the light emitting element, Wherein the operation modes include a first mode driven in a first luminance range and a second mode driven in a second luminance range wider than the first luminance range, Wherein the plurality of clock signals includes a first clock signal having a first frequency and a second clock signal having a second frequency lower than the first frequency, Wherein the signal controller is configured to output the first clock signal in the first mode, and the light emission control circuit is configured to output a first light emission control signal having a first on-duration in the first mode, Wherein the signal controller is configured to output the second clock signal in the second mode, and the light emission control circuit is configured to output a second light emission control signal having a second on-duration in the second mode, and Wherein the pulse width of the first on-duration is equal to the period of the first clock signal and the pulse width of the second on-duration is equal to the period of the second clock signal.
2. 2. The electronic device of claim 1, wherein a maximum luminance of the second luminance range is at least 100 times a maximum luminance of the first luminance range.
3. 3. The electronic device of claim 2, wherein the maximum luminance of the first luminance range is 5 nits and the maximum luminance of the second luminance range is 600 nits.
4. 4. The electronic device of claim 2, wherein the duty cycle of the second on-time is at least four times the duty cycle of the first on-time.
5. 5. The electronic device of claim 2, wherein the plurality of clock signals includes a first color clock signal having a first color frequency, a second color clock signal having a second color frequency, and a third color clock signal having a third color frequency, Wherein the first color frequency, the second color frequency, and the third color frequency are different from each other, Wherein the signal controller is configured to output the first, second, and third color clock signals in the first mode, and Wherein the second color frequency is higher than the first color frequency and the third color frequency is higher than the second color frequency.
6. 6. The electronic device of claim 5, wherein the light emission control circuit is configured to output a first color light emission control signal by receiving the first color clock signal, a second color light emission control signal by receiving the second color clock signal, and a third color light emission control signal by receiving the third color clock signal.
7. 7. The electronic device of claim 6, wherein the pixels are provided in a plurality, and the plurality of pixels includes red, green, and blue pixels, and Wherein the red pixel receives the first color light emission control signal, the green pixel receives the second color light emission control signal, and the blue pixel receives the third color light emission control signal.
8. 8. The electronic device of claim 7, wherein in the second mode, the first color light emission control signal, the second color light emission control signal, and the third color light emission control signal are identical to one another.
9. 9. The electronic device of claim 1, wherein the signal controller further outputs a third clock signal having a third frequency between the first frequency and the second frequency, Wherein the operation modes further include a third mode of driving in a third brightness range, and Wherein the signal controller is configured to output the third clock signal in the third mode, and the light emission control circuit is configured to output a third light emission control signal having a third on-duration.
10. 10. The electronic device of claim 9, wherein, The maximum luminance of the first luminance range is 5 nits, The maximum luminance of the second luminance range is 600 nit, and The maximum luminance of the third luminance range is 126 nit.
11. 11. The electronic device of claim 10, wherein a duty cycle of the third on-duration is greater than a duty cycle of the first on-duration.
12. 12. The electronic device of claim 1, wherein the first mode is an always-on display mode.
13. 13. The electronic device of claim 1, wherein the light emitting element is a micro light emitting diode.
14. 14. The electronic device of claim 1, further comprising: a housing accommodating the display panel contained in the housing, and A strap coupled to the housing.
15. 15. An electronic device, comprising: A display panel including pixels having light emitting elements; A signal controller selectively driving the display panel in a first mode or a second mode different from the first mode and outputting a plurality of clock signals including a first clock signal having a first frequency and a second clock signal having a second frequency lower than the first frequency; a light emitting stage receiving one of the first clock signal and the second clock signal and outputting a light emission control signal having a turn-on duration for controlling a transmission of a current supplied to the light emitting element; a housing accommodating the display panel contained in the housing, and A strap coupled to the housing, Wherein the signal controller outputs the first clock signal in the first mode, and the light emitting stage outputs a first light emitting control signal having a first on-duration, Wherein the signal controller outputs the second clock signal in the second mode, and the light emitting stage outputs a second light emitting control signal having a second on-time, and Wherein the first on-duration has a pulse width equal to the period of the first clock signal and the second on-duration has a pulse width equal to the period of the second clock signal.
16. 16. The electronic device of claim 15, wherein, Driving the first mode in a first luminance range and driving the second mode in a second luminance range wider than the first luminance range, and The maximum luminance of the second luminance range is at least 100 times the maximum luminance of the first luminance range, and the duty cycle of the second on-time is at least 4 times the duty cycle of the first on-time.
17. 17. The electronic device of claim 16, wherein the plurality of clock signals includes a first color clock signal having a first color frequency, a second color clock signal having a second color frequency, and a third color clock signal having a third color frequency, Wherein the first color frequency, the second color frequency, and the third color frequency are different from each other, Wherein the signal controller is configured to output the first, second, and third color clock signals in the first mode, and Wherein the second color frequency is higher than the first color frequency and the third color frequency is higher than the second color frequency.
18. 18. The electronic device of claim 17, wherein the pixel comprises a plurality of pixels, and the plurality of pixels comprises a red pixel, a green pixel, and a blue pixel, and Wherein the light emitting stage is configured to output a first color light emission control signal to the red pixel by receiving the first color clock signal, a second color light emission control signal to the green pixel by receiving the second color clock signal, and a third color light emission control signal to the blue pixel by receiving the third color clock signal.
19. 19. The electronic device of claim 18, wherein in the second mode, the first, second, and third color light emission control signals are identical to one another.
20. 20. The electronic device of claim 15, wherein the light emitting element is a micro light emitting diode.

Description

Electronic device Cross Reference to Related Applications The present application claims priority and benefit from korean patent application No. 10-2024-0154001 filed at the korean intellectual property office on day 11 and 4 of 2024, the entire contents of which are incorporated herein by reference. Technical Field Embodiments described herein relate to electronic devices with reduced power consumption and improved display quality. Background Multimedia electronic devices such as smartwatches, televisions, cellular telephones, tablet computers, navigation systems, and game consoles include display devices that display images. The display device includes a display panel and a panel driving circuit. The panel driving circuit includes a data control circuit supplying a data voltage to the data line, a gate control circuit supplying a gate signal to the gate line, and a light emission control circuit supplying a light emission control signal to the light emission control line. Disclosure of Invention The embodiment provides an electronic device with reduced power consumption and improved display quality. According to an embodiment, an electronic device may include a display panel that displays an image and includes a pixel including a light emitting element and a pixel circuit electrically connected to the light emitting element, a signal controller that determines an operation mode of the display panel and outputs a plurality of clock signals, and a light emission control circuit that receives the plurality of clock signals and outputs a light emission control signal having a turn-on duration for controlling a transmission of a current supplied to the light emitting element. The operation modes may include a first mode driven in a first luminance range and a second mode driven in a second luminance range wider than the first luminance range, and the plurality of clock signals may include a first clock signal having a first frequency and a second clock signal having a second frequency lower than the first frequency. The signal controller may output the first clock signal in a first mode, and the light emission control circuit may output the first light emission control signal having the first on-duration in the first mode. The signal controller may output a second clock signal in a second mode, and the light emission control circuit may output a second light emission control signal having a second on-duration in the second mode. The pulse width of the first on-duration may be substantially equal to the period of the first clock signal and the pulse width of the second on-duration may be substantially equal to the period of the second clock signal. According to an embodiment, the maximum luminance of the second luminance range may be at least 100 times the maximum luminance of the first luminance range. According to an embodiment, the maximum luminance of the first luminance range may be about 5 nits, and the maximum luminance of the second luminance range may be about 600 nits. According to an embodiment, the duty cycle of the second on-time may be at least four times the duty cycle of the first on-time. According to an embodiment, the plurality of clock signals may include a first color frequency signal having a first color frequency, a second color frequency signal having a second color frequency, and a third color frequency signal having a third color frequency, and the first color frequency, the second color frequency, and the third color frequency may be different from each other. The signal controller may output the first color clock signal, the second color clock signal, and the third color clock signal in the first mode, and the second color frequency may be higher than the first color frequency and the third color frequency may be higher than the second color frequency. According to an embodiment, the light emission control circuit may output the first color light emission control signal by receiving the first color clock signal, the second color light emission control signal by receiving the second color clock signal, and the third color light emission control signal by receiving the third color clock signal. According to an embodiment, the pixels may be provided in a plurality, and the plurality of pixels may include red pixels, green pixels, and blue pixels. The red pixel may receive a first color light emission control signal, the green pixel may receive a second color light emission control signal, and the blue pixel may receive a third color light emission control signal. According to an embodiment, in the second mode, the first color light emission control signal, the second color light emission control signal, and the third color light emission control signal may be substantially identical to each other. According to an embodiment, the signal controller may further output a third clock signal having a third frequency between the first frequency and the second frequency, the operation mode may