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KR-20260062129-A - DRIVING CIRCUIT AND ELECTRONIC DEVICE HAVING THE SAME

KR20260062129AKR 20260062129 AKR20260062129 AKR 20260062129AKR-20260062129-A

Abstract

The electronic device includes a display panel, a processor that outputs a transmission signal, and a driving circuit that receives the transmission signal and outputs a data signal to display an image on the display panel based on the transmission signal. The processor outputs the transmission signal corresponding to the at least part of the display panel when the current image corresponding to at least part of the display panel is different from the previous image, and the driving circuit transmits a refresh request signal to the processor when the display time of the still image displayed on the display panel reaches a preset time, and the processor outputs the transmission signal including the still image in response to the refresh request signal.

Inventors

  • 배종만
  • 박채희
  • 김우철
  • 전진영

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260507
Application Date
20241025

Claims (20)

  1. Display panel; A processor that outputs a transmission signal; and It includes a driving circuit that receives the transmission signal and outputs a data signal based on the transmission signal so that an image is displayed on the display panel, The processor outputs the transmission signal corresponding to the at least part of the display panel when the current image corresponding to at least part of the display panel is different from the previous image, and The above driving circuit transmits a refresh request signal to the processor when the display time of a still image displayed on the display panel reaches a preset time, and The above processor is an electronic device that outputs the transmission signal including the still image in response to the above refresh request signal.
  2. In Article 1, The above driving controller is an electronic device that outputs the data signal corresponding to the at least part of the display panel to the display panel when the transmission signal corresponding to the at least part of the display panel is received.
  3. In Article 1, The above processor is an electronic device that outputs the transmission signal corresponding to the entire image of the display panel in response to the above refresh request signal.
  4. In Paragraph 3, The entire image above is an electronic device comprising a video corresponding to at least a portion of the display panel and a still image corresponding to another portion of the display panel.
  5. In Article 1, The above processor and the above driving circuit operate in single frequency mode and multi-frequency mode, and During the above single frequency mode, the entire display panel is driven at the same frequency, and An electronic device in which, during the multi-frequency mode, a first display area of the display panel is driven at a first driving frequency, and a second display area corresponding to at least a part of the display panel is driven at a second driving frequency different from the first driving frequency.
  6. In Article 5, The driving circuit outputs the data signal corresponding to the first display area of the display panel when the transmission signal corresponding to the first display area of the display panel is received, and The above driving circuit is an electronic device that outputs the data signal corresponding to the second display area of the display panel when the transmission signal corresponding to the second display area of the display panel is received.
  7. In Article 5, The above processor is an electronic device that outputs the transmission signal corresponding to the entire image of the display panel in the first frame when the operation mode changes from the single frequency mode to the multi-frequency mode.
  8. In Article 7, The above driving circuit is, A driving controller that receives the above transmission signal and outputs an image data signal and a light emission control signal based on the above transmission signal; and An electronic device comprising a data driving circuit that outputs a data signal corresponding to the above image data signal to the display panel.
  9. In Article 8, The above drive controller is, A counter circuit that outputs a first count signal and a second count signal corresponding to each of the first display area and the second display area, respectively, in synchronization with the light emission control signal, wherein The above driving controller is an electronic device that transmits the refresh request signal to the processor when at least one of the first count signal and the second count signal reaches a preset value.
  10. In Article 9, The above driving controller is an electronic device that resets the first count signal of the counter circuit to 0 when the transmission signal corresponding to the first display area is received, and resets the second count signal of the counter circuit to 0 when the transmission signal corresponding to the second display area is received.
  11. In Article 5, The above processor is an electronic device that outputs the transmission signal corresponding to the entire image of the display panel when the size of each of the first display area and the second display area is changed.
  12. Display panel; A processor that outputs a transmission signal; and It includes a driving circuit that receives the transmission signal and outputs a data signal based on the transmission signal so that an image is displayed on the display panel, During multi-frequency mode, the processor divides the display panel into a first display area where a still image is displayed and a second display area where a video is displayed, and outputs the transmission signal corresponding to the second display area, and During the above multi-frequency mode, the driving circuit transmits a refresh request signal to the processor when the display time of the still image displayed in the first display area of the display panel reaches a preset time, and The above processor is an electronic device that outputs the transmission signal corresponding to the entire image of the display panel in response to the above refresh request signal.
  13. In Article 12, The above processor is an electronic device that outputs the transmission signal corresponding to the entire image of the display panel in the first frame of the above multi-frequency mode.
  14. In Article 13, The above driving circuit is, A driving controller that receives the above transmission signal and outputs an image data signal and a light emission control signal based on the above transmission signal; and An electronic device comprising a data driving circuit that outputs a data signal corresponding to the above image data signal to the display panel.
  15. In Article 14, The above drive controller is, A counter circuit that outputs a first count signal and a second count signal corresponding to each of the first display area and the second display area, respectively, in synchronization with the light emission control signal, wherein The above driving controller is an electronic device that transmits the refresh request signal to the processor when at least one of the first count signal and the second count signal reaches a preset value.
  16. In Article 15, The above driving controller is an electronic device that resets the first count signal of the counter circuit to 0 when the transmission signal corresponding to the first display area is received, and resets the second count signal of the counter circuit to 0 when the transmission signal corresponding to the second display area is received.
  17. In Article 15, The above processor is an electronic device that outputs a transmission signal corresponding to the entire image of the display panel when the size of each of the first display area and the second display area is changed.
  18. A driving controller that receives a transmission signal and outputs an image data signal and a light emission control signal based on the transmission signal; and It includes a data driving circuit that outputs a data signal corresponding to the above-mentioned image data signal to a display panel, The above-described driving controller divides the display panel into a first display area where a still image is displayed and a second display area where a video is displayed, based on the transmission signal, and The above driving controller is a driving circuit that outputs a refresh request signal when the display time of the above still image reaches a preset time.
  19. In Article 18, The above drive controller is, A counter circuit that outputs a first count signal and a second count signal corresponding to each of the first display area and the second display area, respectively, in synchronization with the light emission control signal, wherein The above driving controller is a driving circuit that outputs a refresh request signal when at least one of the first count signal and the second count signal reaches a preset value.
  20. In Article 19, The driving controller is a driving circuit that resets the first count signal of the counter circuit to 0 when the transmission signal corresponding to the first display area is received, and resets the second count signal of the counter circuit to 0 when the transmission signal corresponding to the second display area is received.

Description

Driving circuit and electronic device having the same The present invention relates to a driving circuit and an electronic device including the same. The electronic device comprises pixels connected to data lines and scan lines. Each pixel includes a light-emitting element and a pixel circuit for controlling the light-emitting element. The pixel circuit can provide a current corresponding to a data signal to the light-emitting element. At this time, light of a predetermined brightness can be generated in response to the current flowing through the light-emitting element. One method to improve the display quality of images shown on an electronic device is to increase the driving frequency of the electronic device. On the other hand, one method to reduce the power consumption of an electronic device is to lower the driving frequency of the electronic device. FIG. 1 shows an electronic device according to one embodiment of the present invention. FIG. 2 exemplarily shows an image displayed on an electronic device according to one embodiment of the present invention. FIGS. 3a and FIGS. 3b are perspective views of an electronic device according to one embodiment of the present invention. Figure 4a is a diagram illustrating the operation of an electronic device in single frequency mode. Figure 4b is a diagram illustrating the operation of an electronic device in multi-frequency mode. FIG. 5 is a block diagram of an electronic device according to one embodiment of the present invention. FIG. 6 is a circuit diagram of a pixel according to one embodiment of the present invention. Figure 7 is a block diagram showing the configuration of the processor and drive controller of an electronic device. FIGS. 8a to 8u are drawings that exemplarily show images displayed on a display panel (DP). FIGS. 9A, FIGS. 9B, and FIGS. 9C are diagrams illustrating the operation of the processor and driving circuit during single frequency mode and multi-frequency mode. In this specification, where a component (or region, layer, part, etc.) is described as being "on," "connected," or "combined" with another component, it means that it may be directly placed/connected/combined with 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 the components are exaggerated for the effective illustration of the technical content. "And/or" includes all of 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 side," "above," and "upper side" 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 indicate 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. 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 dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an overly ideal or overly formal sense unless explicitly defined herein. Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an electronic device (ED) according to one embodiment of the present invention. Referring to FIG. 1, a portable terminal is illustrated as an example of an electronic device (ED) according to an embodiment of the present invention. The portable terminal may include a tablet PC, a smartphone, a PDA (Personal Digital Assistant), a PMP (Portable Multimedia Player), a game console, a wristwatch-type electronic device, etc. However, the present invention is not limited thereto. The present invention may be used in large electronic equipment such as televisions or outdoor billboards, as well as in small and medium-sized electronic equipment such as person