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DE-102025139130-A1 - DISPLAY DEVICE

DE102025139130A1DE 102025139130 A1DE102025139130 A1DE 102025139130A1DE-102025139130-A1

Abstract

A display device (1000) comprises: a substrate (110) having a display area (AA) and a non-display area (NA); a pixel driver circuit (PD) provided in the display area (AA); first electrodes (CE1) connected to the pixel driver circuit (PD); light emission devices (ED) provided on the first electrodes (CE1); and second electrodes (CE2) provided on the light emission devices (ED), wherein the pixel driver circuit (PD) comprises: a sensing circuit configured to provide a cathode voltage or a touch drive signal (TDS) to the second electrodes (CE2); and a sensing switch (430) configured to transfer energy from a power circuit (500) to the sensing circuit in response to a touch drive signal (Touch_EN), or to block energy transferred from the power circuit (500).

Inventors

  • SunYeop KIM
  • Namyong Gong
  • Sungchul Kim
  • HoonBae Kim
  • Sung-Jin Kang
  • Jongsung KIM

Assignees

  • LG DISPLAY CO., LTD.

Dates

Publication Date
20260513
Application Date
20250926
Priority Date
20241111

Claims (16)

  1. A display device (1000) comprising: a substrate (110) having a display area (AA) and a non-display area (NA); a pixel driver circuit (PD) provided in the display area (AA); one or more first electrodes (CE1) connected to the pixel driver circuit (PD); one or more light emission devices (ED) provided on the one or more first electrodes (CE1); and a plurality of second electrodes (CE2) provided on the one or more light emission devices (ED), the pixel driver circuit (PD) comprising: a sensing circuit configured to provide a cathode voltage or touch driver signal (TDS) to the plurality of second electrodes (CE2); and a detection switch (430) configured to transfer energy from a power circuit (500) to the detection circuit in response to a touch activation signal (Touch_EN) or to block energy being transferred from the power circuit (500).
  2. The display device (1000) according to Claim 1 , wherein the display device (1000) is configured to use at least two second electrodes (CE2) among the plurality of second electrodes (CE2) connected to the pixel driver circuit (PD) as a touch electrode (TE).
  3. The display device (1000) according to Claim 2 , wherein each of the at least two second electrodes (CE2) extends along a first direction (X) of the substrate (110), and the at least two second electrodes (CE2) are provided along a second direction (Y) of the substrate (110) which differs from the first direction (X) of the substrate (110).
  4. The display device (1000) according to Claim 3 , wherein for each second electrode (CE2) of the at least two second electrodes (CE2) the indicator device (1000) is configured to emit light from the one or more light emission devices (ED) connected to the second electrode (CE2) when a cathode voltage is supplied to the second electrodes (CE2).
  5. The display device (1000) according to Claim 3 or 4 , wherein the display device (1000) is configured to simultaneously provide a touch driver signal (TDS) to the at least two second electrodes (CE2) when the display device (1000) uses the at least two second electrodes (CE2) as a touch electrode (TE).
  6. The display device (1000) according to one of the Claims 1 until 5 , wherein the pixel driver circuit (PD) further comprises a control switch section (410) configured to provide the cathode voltage to the plurality of second electrodes (CE2) during a display period (DP). and to connect the detection circuit with the majority of second electrodes (CE2) during a touch detection period (TP).
  7. The display device (1000) according to one of the Claims 1 until 6 , wherein the pixel driver circuit (PD) further comprises a subpixel driver section (450) configured to provide anode voltages to one or more first electrodes (CE1).
  8. The display device (1000) according to one of the Claims 1 until 7 , further comprising a display driver (200) configured to transmit the touch activation signal (Touch_EN) to the detection switch (430).
  9. The display device (1000) according to Claim 8 , wherein the display driver (200) is configured to transmit a touch activation pulse (E1) forming the touch activation signal (Touch_EN) to the sensing switch (430) when the display driver (200) receives a touch synchronization signal (Tsync) which has a touch signal (S1) indicating a touch sensing period (TP), and the touch synchronization signal (Tsync) distinguishes the touch sensing period (TP) from a display period (DP).
  10. The display device (1000) according to Claim 9 , wherein the detection switch (430) is configured to connect the power circuit (500) to the detection circuit when the detection switch (430) receives the touch activation pulse (E1).
  11. The display device (1000) according to Claim 10 , wherein the sensing circuit is configured to be driven by energy supplied by the power circuit (500) and to provide the touch driver signal (TDS) to the plurality of second electrodes (CE2).
  12. The display device (1000) according to Claim 10 or 11 , wherein the detection switch (430) is configured to disconnect the power circuit (500) from the detection circuit when the detection switch (430) does not receive the touch activation pulse (E1).
  13. The display device (1000) according to one of the Claims 9 until 12 , where the width of the touch activation pulse (E1) is less than or equal to the width of the touch signal (S1).
  14. The display device (1000) according to one of the Claims 9 until 13 , wherein the display driver (200) is configured to sequentially transmit a first activation pulse (E1) and a second activation pulse (E2) to the sensing switch (430) when the display driver (200) receives the touch synchronization signal (Tsync) which has the touch signal (S1) which specifies the touch sensing period (TP).
  15. The display device (1000) according to Claim 14 , wherein: the sensing circuit is configured to provide the touch driver signal (TDS) to the plurality of second electrodes (CE2) in response to the receipt of the first activation pulse (E1), to convert an analog touch sensing signal received by the plurality of second electrodes (CE2) into a digital touch sensing signal and to transmit the digital touch sensing signal to the display driver (200), and the sensing circuit is configured to (i) provide the touch driver signal (TDS) to the plurality of second electrodes (CE2) in response to the receipt of the second activation pulse (E2), or (ii) to convert an analog touch sensing signal received by the plurality of second electrodes (CE2) into a digital touch sensing signal and to transmit the digital touch sensing signal to the display driver (200).
  16. The display device (1000) according to one of the Claims 9 until 15 , wherein the touch detection period (TP) has a normal touch detection period which continues after it is determined that a touch is present, and a wake-up touch detection period which continues after it is determined that a touch is not present, and the indicator driver (200) is configured to transmit the touch activation pulse (E1) to the detection switch (430) during each of the normal touch detection period and the wake-up touch detection period.

Description

AREA OF TECHNOLOGY The present disclosure relates to a display device. BACKGROUND A display device can be used in various electronic devices, such as TVs, mobile phones, laptops and tablets, etc. Display devices can include organic light-emitting displays (OLEDs), which emit light themselves, and liquid crystal displays (LCDs), which require separate light sources. Recently, a display device featuring a light-emitting diode (LED) has attracted attention as a next-generation display device, in which the LED is made of an inorganic material rather than an organic one. Compared to liquid crystal displays or organic light-emitting displays, a display device with such a LED can have a faster illumination speed, excellent luminous efficacy, and can display an image with high luminance. BRIEF EXPLANATION According to one aspect, a display device is provided comprising: a substrate having a display area and a non-display area; a pixel driver circuit provided in the display area; one or more first electrodes connected to the pixel driver circuit; one or more light-emitting devices provided on the first electrodes; and a plurality of second electrodes provided on the first electrodes, wherein the pixel driver circuit comprises: a sensing circuit configured to provide a cathode voltage or a touch-activated signal to the second electrodes; and a sensing switch configured to transfer energy from a power circuit to the sensing circuit or to block energy transferred from the power circuit in response to a touch-activated signal. Further embodiments are described in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the revelation and which are incorporated into and form part of this application, illustrate implementations of the revelation and, together with the description, serve to explain the principle of revelation. 1 is a perspective view showing a display device according to an implementation of the present disclosure; 2 is a top view of a display device according to an implementation of the present disclosure; 3 is an enlarged exemplary diagram of a section of a display device according to an implementation of the present disclosure; 4 is an exemplary diagram showing the structure of a pixel driver circuit used in a display device according to an implementation of the present disclosure; 5 until 7B are top views of a display panel used in a display device according to an implementation of the present disclosure; 8 is an exemplary diagram showing a cross-sectional area of a display panel used in a display device according to an implementation of the present disclosure; 9 is a cross-sectional view of a light emission device used in a display device according to an implementation of the present disclosure; 10 is an exemplary diagram showing the structure of a touch electrode part and a display driver used in a display device according to an implementation of the present disclosure; 11A is an exemplary diagram showing structures of a sub-touch electrode and a pixel driver circuit used in a display device according to an implementation of the present disclosure; 11B is an exemplary diagram showing a connection structure of a sub-touch electrode and a pixel driver circuit, which is used in a display device according to an implementation of the present disclosure; 11C is an exemplary diagram showing a connection relationship between a pixel driver circuit and light emission devices used in a display device according to an implementation of the present disclosure; 11D is an exemplary diagram showing a light emission signal applied to a display device according to an implementation of the present disclosure; 11E is an exemplary diagram showing a pixel circuit used in a display device according to an implementation of the present disclosure; 11F is an exemplary diagram showing a touch detection method for a display device according to an implementation of the present disclosure; 11G is an exemplary diagram showing a display period and a touch detection period applied to a display device according to an implementation of the present disclosure; 12A until 12E are exemplary diagrams showing various control methods of a display device according to an implementation of the present disclosure; and 13 until 16 are diagrams showing electronic devices in which a display device is used according to implementations of the present disclosure. Throughout the drawings and the detailed description, unless otherwise specified, the same drawing reference symbols are to be understood as referring to the same elements, features, and structures. The relative size and representation of these elements may be exaggerated for the sake of clarity, illustration, and practicality. DETAILED DESCRIPTION Implementations of the present disclosure are directed to providing a display device that can block energy supplied to a sensing circuit (e.g., a touch sensing circu