KR-20260065325-A - DISPLAY APPARATUS

KR20260065325AKR 20260065325 AKR20260065325 AKR 20260065325AKR-20260065325-A

Abstract

A display device according to the embodiments of the present specification may include a substrate, a plurality of light-emitting elements disposed on the substrate and located in a display area, a plurality of column lines electrically connected to a first electrode of each of the plurality of light-emitting elements, a plurality of row lines electrically connected to a second electrode of each of the plurality of light-emitting elements, an optical driving element disposed on the substrate and located in a display area, which overlaps with a first row line among the plurality of row lines and emits a specific light of a first wavelength band according to a voltage difference between the two ends, and an optical detection element disposed on the substrate and detecting a specific light reflected from the outside and incident inside.

Inventors

공남용
김성철
김훈배
김선엽
강성진
김종성

Assignees

엘지디스플레이 주식회사

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (20)

Substrate; A plurality of light-emitting elements disposed on the above substrate and located in a display area; A plurality of heat lines electrically connected to the first electrode of each of the plurality of light-emitting elements; A plurality of row lines electrically connected to the second electrode of each of the plurality of light-emitting elements; An optical driving element disposed on the substrate, located in the display area, overlapping with a first row line among the plurality of row lines, and emitting specific light of a first wavelength band according to the voltage difference between the two ends; and A display device comprising an optical detection element disposed on the substrate and detecting specific light reflected from the outside and incident into the inside.
In paragraph 1, It further includes a plurality of drivers electrically connected to the plurality of column lines and the plurality of row lines, and The above display area includes a plurality of cells, and each of the plurality of cells includes a plurality of sub-cells corresponding to the plurality of drivers, and A display device wherein the plurality of cells includes a first cell and a second cell, at least one of the plurality of first sub-cells included in the first cell includes the optical driving element, and at least one of the plurality of second sub-cells included in the second cell includes the optical detection element.
In paragraph 1, It further includes a plurality of drivers electrically connected to the plurality of column lines and the plurality of row lines, and The above display area includes a plurality of cells, and each of the plurality of cells includes a plurality of sub-cells corresponding to the plurality of drivers, and A display device wherein the plurality of sub-cells include a first sub-cell and a second sub-cell, the first sub-cell includes the optical driving element, and the second sub-cell includes the optical detection element.
In the first, It further includes a plurality of drivers electrically connected to the plurality of column lines and the plurality of row lines, and The plurality of drivers above includes a first driver electrically connected to the first row line, and The first driver above is a display device that generates a voltage difference between the anode electrode and the cathode electrode of the optical driving element.
In paragraph 4, A display device in which the first row line is electrically connected to the second electrode of each of two or more first light-emitting elements among the plurality of light-emitting elements, and is electrically connected to the cathode electrode of the optical driving element.
In paragraph 4, A display device further comprising an optical driving control transistor that controls the connection between a high potential voltage node to which a high potential voltage is applied and the anode electrode of the optical driving element.
In paragraph 6, It further includes a plurality of drivers electrically connected to the plurality of column lines and the plurality of row lines, and The above optical drive control transistor is included in one of the plurality of drivers, a display device.
In paragraph 6, The above optical drive control transistor is controlled to turn on and off according to a drive enable control signal, and A display device in which the above-mentioned drive enable control signal corresponds to a light emission control signal that controls the light emission timing of at least one of the plurality of light-emitting elements.
In paragraph 1, The optical detection element includes an anode electrode and a cathode electrode, and conducts a forward current from the anode electrode to the cathode electrode according to specific light incident into the interior of the display device, and The anode electrode of the above optical detection element is electrically connected to a high-potential voltage node to which a high-potential voltage is applied, and An optical detection control transistor that controls the connection between the high-potential voltage node and the low-potential voltage node to which a low-potential voltage is applied, according to the voltage of the cathode electrode of the optical detection element; and A display device further comprising a sensing transistor that controls the connection between the anode electrode of the optical detection element and the sensing node.
In Paragraph 9, It further includes a plurality of drivers electrically connected to the plurality of column lines and the plurality of row lines, and A display device in which the optical detection control transistor and the sensing transistor are included in one of the plurality of drivers.
In Paragraph 10, A display device in which the sensing transistor is controlled to turn on and off according to a sensing enable control signal, and the sensing enable control signal is the same as the scan signal used in one of the plurality of drivers.
In Paragraph 9, The above low-potential voltage node is a display device electrically connected to the above second row line.
In paragraph 1, A plurality of drivers electrically connected to the plurality of column lines and the plurality of row lines; A side protection layer disposed on each side of the plurality of drivers disposed on the substrate; An upper protective layer disposed on the above-mentioned side protective layer and the above-mentioned plurality of drivers; An insulating layer disposed on the upper protective layer above; A bank disposed on the insulating layer, wherein the plurality of light-emitting elements, the optical driving element, and the optical detection element are mounted; and A display device further comprising a first optical layer disposed on the side of the plurality of light-emitting elements.
In Paragraph 13, The above optical driving element is a vertical diode, and The above optical driving element is mounted on the bank, and The above optical driving element is located on the sides of two or more first light-emitting elements that overlap with the first row line, and The first row line is disposed on the optical driving element and is electrically connected to the cathode electrode of the optical driving element, and A display device further comprising an anode connection pattern extending from the upper surface of the insulating layer along the bank side to the upper surface of the bank and electrically connected to the anode electrode of the optical driving element.
In Paragraph 13, The above optical detection element is a vertical diode, and The above optical detection element is mounted on the bank, and The optical detection element is located on the side of two or more second light-emitting elements that overlap with the first row line and a second row line different from the plurality of row lines. An anode connection pattern electrically connected to the anode electrode of the optical detection element; and A display device further comprising a cathode connection pattern extending from the upper surface of the insulating layer along the side of the bank to the upper surface of the bank and electrically connected to the cathode electrode of the optical detection element.
In Paragraph 13, Each of the above two or more first light-emitting elements is a vertical light-emitting diode, and The plurality of column lines includes a plurality of first column lines electrically connected to the first electrode of each of two or more first light-emitting elements that overlap with the first row line, and Each of the plurality of first column lines is disposed on the insulating layer and extends along the side of the bank to the upper surface of the bank, and The first row line above is a display device disposed on the first optical layer and the two or more first light-emitting elements.
In Paragraph 13, A second optical layer surrounding the first optical layer; A third optical layer disposed on the plurality of row lines above; A black matrix disposed on the third optical layer and having an opening that overlaps with the plurality of light-emitting elements; and A display device comprising an overcoat layer disposed on the black matrix, superimposed on the optical driving element and the optical detection element, and further comprising a transparent insulating material.
In paragraph 1, A display device in which the first wavelength band is a wavelength band different from the wavelength band of light emitted by the plurality of light-emitting elements.
In paragraph 1, A display device in which the first wavelength band is an infrared wavelength band.
In paragraph 1, One frame period is, The optical driving element includes an optical driving period in which the optical driving element emits the specific light, and an optical sensing period in which the optical detection element detects the specific light reflected from outside the display device and incident into the interior of the display device. A display device in which at least one of the plurality of light-emitting elements emits light during the above optical driving period.

Description

Display apparatus This specification relates to a display device. Display devices are applied to various electronic devices such as TVs, mobile phones, laptops, and tablets. Display devices include Organic Light Emitting Displays (OLEDs), which emit light themselves, and Liquid Crystal Displays (LCDs), which require a separate light source. Recently, display devices containing light-emitting diodes (LEDs) have been attracting attention as next-generation display devices. Since light-emitting diodes are composed of inorganic materials rather than organic materials, they have a faster lighting speed, superior luminous efficiency, and the ability to display high-brightness images compared to liquid crystal displays or organic light-emitting displays. FIG. 1 shows a display device according to embodiments of the present specification. FIG. 2 is a plan view of a display device according to embodiments of the present specification. FIG. 3 is a plan view of a display panel according to embodiments of the present specification. FIG. 4 is a plan view of a unit driving area of a display panel according to embodiments of the present specification. FIG. 5 shows a subpixel of a display panel according to embodiments of the present specification. FIG. 6 is a plan view of a display panel according to embodiments of the present specification. FIGS. 7 and FIGS. 8 are plan views of a portion of a display panel according to embodiments of the present specification. FIG. 9 is a cross-sectional view of a display panel according to embodiments of the present specification. FIG. 10 is a detailed cross-sectional view of a display panel according to embodiments of the present specification, and is a cross-sectional view along the AB cutting line of FIG. 6. FIG. 11 is an enlarged cross-sectional view of a first subpixel of a display panel according to embodiments of the present specification. FIG. 12 is an equivalent circuit of a subpixel of a display panel according to embodiments of the present specification. FIG. 13 shows an optical touch sensing structure of a display device according to embodiments of the present specification. FIG. 14 is a diagram showing an optical driving area and an optical sensing area configured in cell units in a display device according to embodiments of the present specification. FIG. 15 is a diagram showing an optical driving area and an optical sensing area configured in sub-cell units in a display device according to embodiments of the present specification. FIGS. 16a to 16h are examples of configuring an optical driving region and an optical sensing region in a display device according to embodiments of the present specification. FIG. 17 is a diagram exemplarily showing a first sub-cell included as an optical driving sub-cell within an optical driving region and a second sub-cell included as an optical sensing sub-cell within an optical sensing region in a display device according to embodiments of the present specification. FIG. 18 shows a first subcell included as an optical driving subcell within an optical driving region in a display device according to embodiments of the present specification. FIG. 19 shows a second subcell included as an optical sensing subcell within an optical sensing area in a display device according to embodiments of the present specification. FIG. 20 shows a first subcell included as an optical driving subcell within an optical driving region in a display device according to embodiments of the present specification. FIG. 21 shows a second subcell included as an optical sensing subcell within an optical sensing area in a display device according to embodiments of the present specification. FIG. 22 shows an optical touch sensing system of a display device according to embodiments of the present specification. FIG. 23 is a cross-sectional view of an optical driving region and an optical sensing region in a display panel according to embodiments of the present specification. FIGS. 24 to 26 are driving timing diagrams of a display device according to embodiments of the present specification. The advantages and features of this specification and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, this specification is not limited to the embodiments disclosed below but may be implemented in various different forms, and these embodiments are provided merely to ensure that the disclosure of this specification is complete and to fully inform those skilled in the art of the scope of the invention. Shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of this specification are exemplary and are not limited to the depicted items. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing this specification, if it is determined that a detailed description of related prior art co