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KR-102963271-B1 - DISPLAY INTEGRATED TOUCH SENSING DEVICE

KR102963271B1KR 102963271 B1KR102963271 B1KR 102963271B1KR-102963271-B1

Abstract

A touch detection device according to the present invention comprises a transparent substrate; a touch sensor layer including a touch sensor formed on the transparent substrate; and a display layer formed on the touch sensor layer to display an image, wherein the image displayed by the display layer is provided to a user through the transparent substrate, and the user provides touch input by touching the transparent substrate.

Inventors

  • 박진우
  • 원지운

Assignees

  • 주식회사 지2터치

Dates

Publication Date
20260511
Application Date
20220311

Claims (10)

  1. Transparent substrate; A touch sensor layer comprising a touch sensor formed on the above transparent substrate; It includes a display layer formed on the touch sensor layer to display an image, and The image displayed by the above display layer is provided to the user through the transparent substrate, and The user provides touch input by touching the transparent substrate, The above display layer is, It includes a TFT layer and a color filter layer, wherein the color filter layer includes R, G, and B color filters and a black matrix formed at the boundary of the color filters. The above touch sensor is formed aligned directly above the black matrix, and In the above TFT layer, a liquid crystal and a TFT transistor that provides a signal to drive the liquid crystal are located. The above TFT transistor is provided with a scan signal and a data signal, and The gate line to which the scan signal is provided and the source line to which the data signal is provided are positioned overlapping with the black matrix, and The above touch sensor is, It is connected to a touch drive IC through a conductive line, and the conductive line extends directly upward from the black matrix in a different plane. The above touch sensor layer is, Each includes a protruding area and a concave area, and includes a first touch sensor and a second touch sensor adjacent to each other. A touch detection device in which the protruding area of the first touch sensor protrudes into the concave area of the second touch sensor, and the protruding area of the second touch sensor protrudes into the concave area of the first touch sensor.
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  6. In paragraph 1, The above-mentioned conductive line is, A touch detection device formed of the same material as the above-mentioned touch sensor.
  7. In paragraph 1, The above conductive line is a touch detection device formed of a transparent conductive material.
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  9. In paragraph 1, The above touch sensor is, A touch detection device that is a self-dot type touch sensor.
  10. In paragraph 1, The above touch sensor is, A touch detection device formed on the transparent substrate in direct contact with the transparent substrate.

Description

Display Integrated Touch Sensing Device The present technology relates to a touch detection device. More specifically, it relates to a display-integrated touch detection device formed integrally with a display. A touch panel that detects touch input is generally a device added to a display device such as an LCD (Liquid Crystal Display), PDP (Plasma Display Panel), OLED (Organic Light Emitting Diode), or AMOLED (Active Matrix Organic Light Emitting Diode) to detect touch input from objects such as fingers or styluses. Touch panels are widely installed in mobile devices such as mobile phones and tablets, and are also utilized across almost all industrial sectors, ranging from user/consumer electronics such as navigation systems, laptops, desktop computers using touch input-supported operating systems, and IPTV (Internet Protocol TV), to heavy equipment that provides user input. Display devices using the aforementioned touchscreen can be classified into touchscreen add-on type display devices, touchscreen on-cell type display devices, and touchscreen in-cell type display devices according to their structure. In methods for detecting user touch input using magnetic capacitance, it was common practice to form the electrodes forming the object and the capacitor in a shape that extends in one direction. FIG. 1 is a schematic diagram illustrating a cross-section of a display device including a touch sensing layer. Figure 2 is a schematic diagram illustrating a display layer. Figure 3 is a schematic diagram illustrating a cross-section of a TFT layer and a touch sensing layer. FIG. 4 is a top view illustrating an overview of a touch sensor formed on a transparent substrate. FIG. 5 is a diagram illustrating a touch sensor including a first sensor and a second sensor arranged in a column. Figure 6 is a diagram schematically illustrating the connection relationship between a touch sensor and a conductive line. FIG. 7(a) is a schematic diagram illustrating an example of detecting touch using a self-dot type panel according to the present embodiment, and FIG. 7(b) is a diagram illustrating an electrical equivalent circuit when a user's finger (not shown) comes into contact with a sensing pad. The present embodiment will be described below with reference to the attached drawings. FIG. 1 is a schematic cross-sectional view of a display device including a touch sensing layer (100). FIG. 2 is a schematic view of a display layer (200). However, for ease of understanding in FIG. 2, the illustration of the color filter substrate (GLS) is omitted, and the stacking order of the TFT layer (210) and the color filter layer (220) is shown upside down. Referring to FIGS. 1 and 2, the display device includes a transparent substrate (Sub), a touch sensor layer (100) comprising a touch sensor (110, see FIG. 3) formed on the transparent substrate (Sub), and a display layer (200) that displays an image. The image displayed by the display layer (200) is provided to a user through the transparent substrate (Sub), and an object (O) that provides touch input provides touch input through the transparent substrate (Sub). In the illustrated embodiment, the first polarizing layer (POLa) polarizes white light formed by a back light unit (BLU) and provides it to a display layer (200) including a color filter layer (220) and a TFT layer (210). The light transmitted through the color filter layer (220) and the TFT layer (210) is provided to a user through a touch sensing layer (100), a transparent substrate (sub), and a second polarizing layer (POLb). In one embodiment, the polarization direction of the first polarizing layer (POLa) and the polarization direction of the second polarizing layer (POLb) may be orthogonal to each other at 90 degrees. The color filter layer (220) includes a color filter substrate (GLS), color filter pixels (P) formed on the color filter substrate, and a black matrix (BM) located at the boundary between the color filter pixels (P). In one embodiment, the color filter pixels (P) may have a pigment or dye located thereon that converts and transmits white light provided by a backlight unit (BLU) into red, green, and blue. In the color filter layer (220), a flattening layer (not shown) and a common electrode (CE) formed on the flattening layer may be further formed on top of the color filter pixels. In one embodiment, the common electrode (CE) may be formed of a transparent conductive material to improve the transmittance of emitted light, and the transparent conductive material may be ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide). As described below, the common electrode (CE) may provide a liquid crystal driving signal that controls the orientation direction of the pixel electrode (221, see FIG. 3) and the liquid crystal. A TFT layer (210) has a liquid crystal (LC) and a TFT (213) that provides a liquid crystal control signal. In one embodiment, the liquid crystal is located at a position corresponding to a color filter pi