CN-122024630-A - Display device

Abstract

There is provided a display apparatus 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 electrically connected to the first electrode, and a second electrode connected to the light emitting device, wherein an image signal line is connected to the pixel driving circuit, and the pixel driving circuit is configured to selectively connect the image signal line to the first electrode or the second electrode.

Inventors

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

Assignees

• 乐金显示有限公司

Dates

Publication Date

20260512

Application Date

20250928

Priority Date

20241111

Claims (20)

1. 1. A 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 image signal line is connected to the pixel driving circuit, and Wherein the pixel driving circuit is configured to selectively connect the image signal line to the first electrode or the second electrode.
2. 2. The display device according to claim 1, wherein at least two second electrodes connected to the pixel driving circuit can be used as one touch electrode.
3. 3. The display device according to claim 2, wherein, Each of the at least two second electrodes extending along a first direction of the substrate, and The at least two second electrodes are spaced apart from each other along a second direction different from the first direction.
4. 4. A display apparatus 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, During a display period in which an image is displayed, an image signal for driving the light emitting device is supplied to the pixel driving circuit through the image signal line, and During a touch sensing period in which a touch is detected, a touch sensing signal transmitted from the second electrode is output to the image signal line.
7. 7. The display device according to claim 1, wherein the pixel driving circuit includes: A cathode electrode driving part that supplies a cathode voltage or a touch driving signal to the second electrode; A subpixel driving part for supplying an anode voltage to the first electrode, and And a switching section that connects the image signal line to the cathode electrode driving section or the sub-pixel driving section.
8. 8. The display device according to claim 7, wherein the switching section includes: a cathode voltage switch connected between a cathode voltage supply part that supplies the cathode voltage and the cathode electrode driving part; an image signal switch connecting the image signal line to the sub-pixel driving section or separating the image signal line from the sub-pixel driving section, and And a mode switch connected between a switch connection line connecting the cathode voltage switch to the cathode electrode driving part and the image signal line.
9. 9. The display device according to claim 1, further comprising a cathode voltage supply portion that generates a cathode voltage to be supplied to the second electrode, and supplies the cathode voltage to the pixel driving circuit.
10. 10. The display device according to claim 1, further comprising a display driver that supplies an image signal to the image signal line or detects a touch on the substrate using a touch sensing signal transmitted from the second electrode through the image signal line.
11. 11. The display device of claim 10, wherein, The second electrode driven by the at least one pixel driving circuit forms a touch electrode, The touch sensing period of detecting a touch includes a contact touch sensing period of detecting a touch by an object contacting the display area and a hover touch sensing period of detecting a touch by an object spaced apart from the display area, In the touch sensing period, the display driver detects a touch on the touch electrode corresponding to a touch coordinate by using a touch sensing signal received from at least one pixel driving circuit, and In the hover touch sensing period, the display driver detects a touch on the touch electrode corresponding to a touch coordinate by using touch sensing signals received from a greater number of pixel driving circuits than the number of pixel driving circuits transmitting touch sensing signals during the touch sensing period.
12. 12. The display device of claim 10, wherein, The second electrode driven by the at least one pixel driving circuit forms a touch electrode, The touch sensing period in which a touch is detected includes a contact touch sensing period in which a touch by an object contacting the display area is detected, and a hover touch sensing period in which a touch by an object spaced apart from the display area is detected, and The size of the touch electrode identified as the touch coordinate during the hover touch sensing period is greater than the size of the touch electrode identified as the touch coordinate during the contact touch sensing period.
13. 13. The display device according to claim 10, wherein the display driver comprises: an image signal generation unit that generates the image signal; a touch determination section that generates a touch driving signal and detects a touch on the substrate by using a touch sensing signal received from the image signal line; a signal switching section connecting the image signal line to the image signal generating section or the touch determining section, and And a group switch section provided between the signal switch section and the touch determination section.
14. 14. The display device of claim 13, wherein, The signal switch section includes a signal switch connected to the image signal line, and At least two of the signal switches are connected to the group switch section through a group line.
15. 15. The display device of claim 14, wherein, At least two image signal lines connected to the at least two signal switches are connected to at least two pixel driving circuits, and The second electrodes driven by the at least two pixel driving circuits form one touch electrode.
16. 16. The display device according to claim 14, wherein the group switching section includes: At least two group switches connected to at least two group lines connected to the signal switch section, and A connection switch arranged between the at least two group lines, and Wherein each of the connection switches is disposed between two adjacent group lines.
17. 17. The display device according to claim 16, wherein the touch determination portion includes at least two determination portions connected to the at least two group switches.
18. 18. The display device of claim 17, wherein, The touch sensing period in which a touch is detected includes a contact touch sensing period in which a touch by an object contacting the display area is detected, and a hover touch sensing period in which a touch by an object spaced apart from the display area is detected, and During the contact touch sensing period, the at least two determining portions are driven to detect a touch on the substrate.
19. 19. The display device of claim 18, wherein during the hover touch sensing period, at least one of the at least two determinations is driven to detect a touch on the substrate.
20. 20. The display device of claim 17, wherein, Each of the at least two determination sections generates and transmits a touch driving signal to the group switching section, and detects a touch on the substrate by using a touch sensing signal received through the group switching section.

Description

Display device Cross Reference to Related Applications The present application claims the benefit of korean patent application No. 10-2024-0159058, filed 11/2024, which is incorporated herein by reference in its entirety. Technical Field The present disclosure relates to a display device. Background Display devices are applied to various electronic apparatuses such as televisions, mobile phones, laptops, and tablet computers. Display devices include Organic Light Emitting Displays (OLEDs) that emit light themselves and Liquid Crystal Displays (LCDs) that require 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, a display device including a light emitting diode has a faster light emitting 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. Disclosure of Invention Accordingly, the present disclosure is directed to providing 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 relates to providing a display device capable of changing a size of a touch electrode corresponding to a touch coordinate according to a type of touch to be sensed. 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 apparatus 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 an image signal line is connected to the pixel driving circuit, and wherein the pixel driving circuit is configured to selectively connect the image signal line to the first electrode or the second electrode. It is to be understood that both the foregoing general description and the following detailed description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the present disclosure as claimed. 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 device 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 showing a cross section of a display panel applied to a display device according to an embodiment of the present disclosure; Fig. 9 is a cross-sectional view of a light emitting device applied to a display apparatus according to an embodiment of the present disclosure; Fig. 10A is an exemplary diagram showing the structures of a touch electrode part and a display driver applied to a display device according to an embodiment of the present disclosure; Fig. 10B is an exemplary diagram illustrating in detail the structure of the display driver illustrated in fig. 10A; Fig. 11A is an exemplary diagram showing the structures of sub-touch electrodes and pixel driving circuits applied to a display device according to an embodiment of the present disclosure; Fig. 11B is an exemplary diagram showing a connection structure of a sub-touch electrode and a pixel driving circuit applied to a display device according to an embodiment of the present disclosure; fig. 11C is an exemplary diagram showing a connection relationship between a pixel driving circuit and a light emitting device applied to a display apparatus according to an embodiment of the p