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CN-122018832-A - Display apparatus

CN122018832ACN 122018832 ACN122018832 ACN 122018832ACN-122018832-A

Abstract

The present disclosure provides a display device. The display device includes a substrate including a display region and a non-display region, a pixel driving circuit disposed in the display region, a first electrode connected to the pixel driving circuit, a light emitting device disposed on the first electrode, and a second electrode disposed on the light emitting device, wherein the pixel driving circuit includes a sensing part configured to supply a cathode voltage or a touch driving signal to the second electrode, and a sensing switch configured to transmit power from a power part to the sensing part or block the power transmitted from the power part in response to a touch enabling signal.

Inventors

  • Jin Shanye
  • Kong Nanrong
  • Jin Chengche
  • Jin Xunpei
  • JIANG CHENGZHEN
  • JIN ZHONGCHENG

Assignees

  • 乐金显示有限公司

Dates

Publication Date
20260512
Application Date
20250926
Priority Date
20241111

Claims (16)

  1. 1. A display device, the display device comprising: A substrate including a display region and a non-display region; a pixel driving circuit disposed in the display region; a first electrode connected to the pixel driving circuit; a light emitting device disposed on the first electrode, and A second electrode disposed on the light emitting device, Wherein the pixel driving circuit includes: A sensing part configured to supply a cathode voltage or a touch driving signal to the second electrode, and A sensing switch configured to transmit power from a power section to the sensing section or block power transmitted from the power section in response to a touch enable signal.
  2. 2. The display device according to claim 1, wherein at least two second electrodes connected to the pixel driving circuit function as one touch electrode.
  3. 3. The display device of claim 2, wherein each of the at least two second electrodes extends along a first direction of the substrate, and The at least two second electrodes are arranged along a second direction different from the first direction.
  4. 4. A display device according to claim 3, wherein when a cathode voltage is supplied to any one of the at least two second electrodes, light is emitted from a light emitting device connected to the second electrode to which the cathode voltage is supplied.
  5. 5. A display device according to claim 3, wherein when the at least two second electrodes are used as one touch electrode, touch driving signals are simultaneously supplied to the at least two second electrodes.
  6. 6. The display device according to claim 1, wherein the pixel driving circuit further comprises a control switch section configured to supply a cathode voltage to the second electrode during a display period and to connect the sensing section to the second electrode during a touch sensing period.
  7. 7. The display device according to claim 1, wherein the pixel driving circuit further comprises a sub-pixel driving section configured to supply an anode voltage to the first electrode.
  8. 8. The display device of claim 1, further comprising a display driver configured to transmit a touch enable signal to the sense switch.
  9. 9. The display device according to claim 8, wherein when a touch signal indicating a touch sensing period among touch synchronization signals is received, the display driver transmits a touch enable pulse constituting the touch enable signal to the sensing switch, and The touch synchronization signal distinguishes a touch sensing period from a display period.
  10. 10. The display device of claim 9, wherein the sense switch connects the power portion to the sensing portion when the touch enable pulse is received.
  11. 11. The display device according to claim 10, wherein the sensing portion is driven by power supplied from the power portion, and the touch driving signal is supplied to the second electrode.
  12. 12. The display device of claim 10, wherein the sense switch disconnects the power portion from the sensing portion when the touch enable pulse is not received.
  13. 13. The display device of claim 9, wherein a width of the touch enable pulse is less than or equal to a width of the touch signal.
  14. 14. The display device of claim 9, wherein the display driver sequentially transmits a first enable pulse and a second enable pulse to the sensing switch when the touch signal is received.
  15. 15. The display device according to claim 14, wherein when the first enable pulse is received, the sensing part supplies a touch driving signal to the second electrode, converts an analog type touch sensing signal received from the second electrode into a digital type touch sensing signal, and transmits the digital type touch sensing signal to the display driver, and When the second enable pulse is received, the sensing part supplies a touch driving signal to the second electrode, or converts an analog type touch sensing signal received from the second electrode into a digital touch sensing signal and transmits the digital touch sensing signal to the display driver.
  16. 16. The display device of claim 9, wherein the touch sensing period comprises a normal touch sensing period that continues after a determination that a touch is present and a wake-up touch sensing period that continues after a determination that no touch is present, and The display driver transmits the touch enable pulse to the sense switch during each of the normal touch sensing period and the wake-on-touch sensing period.

Description

Display apparatus Technical Field The present disclosure relates generally to devices, and in particular, for example, but not limited to, display devices. Background Display apparatuses are applied to various electronic devices such as TVs, mobile phones, laptop computers, and tablet computers. The display device may include an Organic Light Emitting Display (OLED) that emits light by itself and a Liquid Crystal Display (LCD) that requires a separate light source. Recently, a display device including a Light Emitting Diode (LED) has attracted attention as a next generation display device. The light emitting diode is made of an inorganic material instead of an organic material. Accordingly, the display device including the light emitting diode has a faster illumination speed, has excellent light emitting efficiency, and can display an image having high brightness, compared to a liquid crystal display or an organic light emitting display. The description provided in the discussion of the background section should not be assumed to be prior art merely because it is referred to in or associated with that section. The discussion of the background section may include information describing one or more aspects of the subject technology, and the description in this section is not intended to limit the present disclosure. Disclosure of Invention Accordingly, the present disclosure is directed to a display device that substantially obviates one or more problems due to limitations and disadvantages of the related art. An aspect of the present disclosure is directed to providing a display device that blocks power supplied to a sensing part that performs a function of outputting a touch driving signal during a period in which the touch driving signal is not output to a touch electrode in a touch sensing period. Additional advantages and features of the disclosure will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the disclosure. The objectives and other advantages of the disclosure may be realized and attained by the structure particularly pointed out in the written description and drawings. To achieve these and other advantages and in accordance with the purpose of the present disclosure, as embodied and broadly described herein, there is provided a display device including a substrate including a display region and a non-display region, a pixel driving circuit disposed in the display region, a first electrode connected to the pixel driving circuit, a light emitting device disposed on the first electrode, and a second electrode disposed on the light emitting device, wherein the pixel driving circuit includes a sensing part configured to supply a cathode voltage or a touch driving signal to the second electrode, and a sensing switch configured to transmit power from the power part to the sensing part or block power transmitted from the power part in response to the touch enabling signal. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the inventive concepts as claimed. Other systems, methods, features and advantages will be or will become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the present disclosure, and be protected by the accompanying claims. Nothing in this section should be taken as a limitation on those claims. Additional aspects and advantages will be discussed below in connection with the embodiments of the present disclosure. Drawings The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure. In the drawings: fig. 1 is a perspective view illustrating a display apparatus according to an embodiment of the present disclosure; Fig. 2 is a plan view of a display device according to an embodiment of the present disclosure; fig. 3 is an enlarged exemplary diagram of a portion of a display device according to an embodiment of the present disclosure; Fig. 4 is an exemplary diagram showing a structure of a pixel driving circuit applied to a display device according to an embodiment of the present disclosure; Fig. 5 to 7B are plan views of a display panel applied to a display device according to an embodiment of the present disclosure; fig. 8 is an exemplary diagram illustrating a cross-sectional surface of a display panel applied to a display device according to an embodiment of the present disclosure;