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KR-20260067394-A - ELECTRONIC DEVICE

KR20260067394AKR 20260067394 AKR20260067394 AKR 20260067394AKR-20260067394-A

Abstract

The electronic device includes a signal control unit that determines the operating mode of a display panel and outputs a plurality of clock signals, and a light emission control circuit that outputs a light emission control signal. The operating mode includes a first mode and a second mode. The plurality of clock signals include a first clock signal having a first frequency and a second clock signal having a second frequency lower than the first frequency. In the first mode, the signal control unit outputs the first clock signal and the light emission control circuit is configured to output a first light emission control signal having a first turn-on interval. In the second mode, the signal control unit outputs the second clock signal and the light emission control circuit is configured to output a second light emission control signal having a second turn-on interval. The pulse width of the first turn-on interval is the same as the period of the first clock signal, and the pulse width of the second turn-on interval may be the same as the period of the second clock signal.

Inventors

  • 이세현
  • 김귀현
  • 이선화
  • 정경훈

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260513
Application Date
20241104

Claims (20)

  1. A display panel that displays an image and includes a pixel comprising a light-emitting element and a pixel circuit electrically connected to the light-emitting element; A signal control unit that determines the operating mode of the above-mentioned display panel and outputs a plurality of clock signals; and It includes a light emission control circuit that receives the plurality of clock signals and outputs a light emission control signal having a turn-on period for controlling the delivery of current provided to the light emission element, The above operating mode includes a first mode driven by a first luminance range and a second mode driven by a second luminance range wider than the first luminance range, and The plurality of clock signals include a first clock signal having a first frequency and a second clock signal having a second frequency lower than the first frequency, and In the first mode above, the signal control unit outputs the first clock signal, and the light emission control circuit is configured to output a first light emission control signal having a first turn-on period, and In the second mode above, the signal control unit outputs the second clock signal, and the light emission control circuit is configured to output a second light emission control signal having a second turn-on period, and An electronic device in which the pulse width of the first turn-on interval is the same as the period of the first clock signal, and the pulse width of the second turn-on interval is the same as the period of the second clock signal.
  2. In Article 1, An electronic device in which the maximum brightness of the second brightness range is 100 times or more the maximum brightness of the first brightness range.
  3. In Article 2, An electronic device in which the maximum brightness of the first brightness range is 5 nits and the maximum brightness of the second brightness range is 600 nits.
  4. In Article 2, An electronic device in which the duty ratio of the second turn-on section is at least four times the duty ratio of the first turn-on section.
  5. In Article 2, A plurality of clock signals include 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, and The first color frequency, the second color frequency, and the third color frequency are different from each other, In the first mode above, the signal control unit is configured to output the first color clock signal, the second color clock signal, and the third color clock signal, and An electronic device in which the second color frequency is higher than the first color frequency and the third color frequency is higher than the second color frequency.
  6. In Article 5, An electronic device configured such that the light emission control circuit receives the first color clock signal and outputs a first color light emission control signal, receives the second color clock signal and outputs a second color light emission control signal, and receives the third color clock signal and outputs a third color light emission control signal.
  7. In Article 6, The above pixels are provided in plurality, and the plurality of pixels include red pixels, green pixels, and blue pixels, and An electronic device in which the above red pixel receives the first color light emission control signal, the above green pixel receives the second color light emission control signal, and the above blue pixel receives the third color light emission control signal.
  8. In Article 7, An electronic device configured to receive the light emission control signal having the same pulse width of the turn-on interval in the second mode above.
  9. In Article 1, The above signal control unit further outputs a third clock signal having a third frequency between the first frequency and the second frequency, and The above operating mode further includes a third mode driven by a third brightness range, and An electronic device configured such that, in the above third mode, the signal control unit outputs the third clock signal, and the light emission control circuit outputs a third light emission control signal having a third turn-on period.
  10. In Article 9, An electronic device in which the maximum brightness of the first brightness range is 5 nits, the maximum brightness of the second brightness range is 600 nits, and the maximum brightness of the third brightness range is 126 nits.
  11. In Article 10, An electronic device in which the duty ratio of the third turn-on section is greater than the duty ratio of the first turn-on section.
  12. In Article 1, The above first mode is an electronic device that is an always-on screen mode.
  13. In Article 1, The above-mentioned light-emitting element is an electronic device that is a micro light-emitting diode.
  14. In Article 1, An electronic device further comprising a housing with a built-in display panel and a strap connected to the housing.
  15. A display panel including a pixel including a light-emitting element; A signal control unit configured to selectively drive the above display panel in a first mode or in a second mode different from the first mode, and outputs 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 that receives one of the first clock signal and the second clock signal and outputs a light-emitting control signal having a turn-on section that controls the delivery of current provided to the light-emitting element; Housing with the above-mentioned display panel built in; and It includes a strap connected to the above housing, In the first mode above, the signal control unit outputs the first clock signal, and the light-emitting stage is configured to output a first light-emitting control signal having a first turn-on period, and In the second mode above, the signal control unit outputs the second clock signal, and the light-emitting stage is configured to output a second light-emitting control signal having a second turn-on period, and An electronic device in which the pulse width of the first turn-on interval is the same as the period of the first clock signal, and the pulse width of the second turn-on interval is the same as the period of the second clock signal.
  16. In Article 15, An electronic device in which the maximum brightness of the second brightness section is at least 100 times the maximum brightness of the first brightness section, and the duty ratio of the second turn-on section is at least 4 times the duty ratio of the first turn-on section.
  17. In Article 16, A plurality of clock signals include 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, and The first color frequency, the second color frequency, and the third color frequency are different from each other, In the first mode above, the signal control unit is configured to output the first color clock signal, the second color clock signal, and the third color clock signal, and An electronic device in which the second color frequency is higher than the first color frequency and the third color frequency is higher than the second color frequency.
  18. In Article 17, The above pixels are provided in plurality, and the plurality of pixels include red pixels, green pixels, and blue pixels, and An electronic device configured such that the light-emitting stage receives the first color clock signal and outputs a first color light-emitting control signal to the red pixel, receives the second color clock signal and outputs a second color light-emitting control signal to the green pixel, and receives the third color clock signal and outputs a third color light-emitting control signal to the blue pixel.
  19. In Article 18, An electronic device configured to receive the light emission control signal having the same pulse width of the turn-on interval in the second mode above.
  20. In Article 15, The above-mentioned light-emitting element is an electronic device that is a micro light-emitting diode.

Description

ELECTRONIC DEVICE The present invention relates to an electronic device with reduced power consumption and improved display quality. Multimedia electronic devices such as smartwatches, televisions, mobile phones, tablet computers, navigation systems, and game consoles are equipped with a display device for displaying images. The display device includes a display panel and a panel driving circuit. The panel driving circuit includes a data control circuit that provides data voltage to a plurality of data lines, a gate control circuit that provides gate signals to a plurality of gate lines, and a light emission control circuit that provides light emission control signals to a plurality of light emission control lines. FIG. 1 is a perspective view of an electronic device according to one embodiment of the present invention. FIG. 2 is a plan view of an electronic device according to one embodiment of the present invention. FIG. 3 is a cross-sectional view schematically showing an electronic device according to one embodiment of the present invention. FIG. 4 is a block diagram of an electronic device according to one embodiment of the present invention. FIG. 5 is a circuit diagram of a pixel according to one embodiment of the present invention. FIG. 6 is a diagram showing one light-emitting stage included in a light-emitting control circuit according to one embodiment of the present invention. FIG. 7 is a graph showing the frequency of each of a plurality of clock signals according to one embodiment of the present invention. FIG. 8a is a timing diagram showing signals in a first mode according to an embodiment of the present invention. FIG. 8b is a timing diagram showing signals in a second mode according to an embodiment of the present invention. FIG. 8c is a timing diagram showing signals in a third mode according to an embodiment of the present invention. FIG. 9 is a graph showing the frequency of each of a plurality of clock signals according to one embodiment of the present invention. FIG. 10a is a block diagram for showing signals according to each pixel in a first mode according to an embodiment of the present invention. FIG. 10b is a block diagram for showing signals according to each pixel in a second mode according to an embodiment of the present invention. In this specification, where a component (or region, layer, part, etc.) is described as being “on,” “connected,” or “joined” another component, it means that it may be directly placed/connected/joined on the other component, or that a third component may be placed between them. Identical reference numerals denote identical components. Additionally, in the drawings, the thicknesses, proportions, and dimensions of components are exaggerated for the effective illustration of the technical content. “And/or” includes all one or more combinations that the associated components may define. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise. Additionally, terms such as “below,” “lower,” “above,” and “upper” are used to describe the relationships between the components depicted in the drawings. These terms are relative concepts and are described based on the directions indicated in the drawings. Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. The terms "part" and "unit" refer to software components or hardware components that perform specific functions. Hardware components may include, for example, field-programmable gate arrays (FPGAs) or application-specific integrated circuits (ASICs). Software components may refer to executable code and/or data used by executable code within an addressable storage medium. Thus, software components may be, for example, object-oriented software components, class components, and task components, and may include processes, functions, attributes, procedures, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, or variables. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Furthermore, terms such as those defined in commonly used dic