TW202235970A - Touch display - Google Patents

Abstract

A touch display includes a substrate, a plurality of display light emitting elements, an infrared light emitting element, and an infrared light sensor. The display light emitting elements are arranged in array on the substrate. The infrared light emitting element is disposed between the display light emitting elements and has a first field of view. The infrared light sensor is disposed between the display light-emitting elements and has a second field of view. The first field of view and the second field of view have an overlapping area.

Description

touch monitor

The disclosure relates to a touch display.

With the advancement of technology, touch displays have become a commonly used user input device. In most public places (such as medical institutions, shopping malls, public transportation stations), more and more touch displays are available for public use. In view of this, if the user can operate the touch display without actually touching the display surface of the touch display, it will be a great improvement for the touch display.

However, among the existing optical touch displays, the current optical touch displays that use the embedded light-emitting diode (In LED type) to achieve optical touch requires the user to actually touch the optical touch display. Only the optical touch display can detect the touch on the display surface. In other words, limited by the existing technology, the current optical touch display is still unable to realize the floating touch display whether it is equipped with a liquid crystal display (LCD), a submillimeter light-emitting diode (mini LED) or a micro light-emitting diode (micro LED). Novel application of control. Therefore, there is an urgent need for an optical touch that can realize floating touch.

The disclosure provides a touch display, including a substrate, a plurality of display light emitting elements, an infrared light emitting element, and an infrared light sensor. Multiple arrays of display light-emitting elements are arranged on the substrate. The infrared light-emitting elements are arranged between the display light-emitting elements and have a first field of view. The infrared light sensor is disposed between the display light-emitting elements and has a second viewing range, wherein the first viewing range and the second viewing range have overlapping areas.

In one or more implementations of the present disclosure, the touch display further includes a light sensor, the light sensor is disposed between the display light-emitting elements, and at least one of the display light-emitting elements is sandwiched between the light sensor and the display light-emitting elements. Between infrared light emitting elements or infrared light sensors.

In one or more implementations of the present disclosure, in a touch mode, the infrared light emitting element does not emit an infrared light signal, and the light sensor is configured to receive visible light and output a sensing signal.

In one or more embodiments of the present disclosure, the overlapping area includes a depth of field range. In a touch mode, the infrared light emitting element is configured to emit an infrared light signal within the first field of view, and when the infrared light signal arrives at the depth of field After the user's position within the range, the infrared light sensor is configured to receive the infrared light signal reflected from the user's position and output a sensing signal.

In one or more implementations of the present disclosure, the touch display further includes a lens disposed on the infrared light emitting element.

In one or more implementations of the present disclosure, the touch display further includes a lens disposed on the infrared light sensor.

In one or more embodiments of the present disclosure, the overlapping region includes a depth of field range, and a distance between the depth of field range and the lens is 2 cm to 10 cm.

In one or more implementations of the present disclosure, the touch display further includes a thin film transistor disposed between the substrate and the infrared light sensor.

In one or more implementations of the present disclosure, the touch display further includes a thin film transistor disposed between the substrate and the infrared light emitting element.

In one or more implementations of the present disclosure, the touch display further includes a driving chip disposed between the substrate and the infrared light emitting element.

In one or more implementations of the present disclosure, the touch display further includes a driving chip disposed between the substrate and the infrared light sensor.

In order to make the description of the present disclosure more detailed and complete, the following provides an illustrative description of the implementation aspects and specific embodiments of the present invention; but this is not the only form of implementing or using the specific embodiments of the present invention. The various embodiments disclosed below can be combined or replaced with each other when beneficial, and other embodiments can also be added to one embodiment, without further description or illustration.

In the following description, numerous specific details will be set forth in order to enable readers to fully understand the following embodiments. However, embodiments of the invention may be practiced without these specific details. In other instances, well-known structures and devices are only schematically shown in order to simplify the drawings.

In order to make the description of the present disclosure more detailed and complete, reference may be made to the accompanying drawings and various implementations described below, and the same numbers in the drawings represent the same or similar elements.

As used herein, the terms "about", "approximately" or "approximately" generally refer to the error or range of the value within about 20%, preferably within about 10%, more preferably It is within about five percent.

The disclosure provides a touch display 10 . FIG. 1 shows an exploded view of a touch display 10 according to some embodiments of the present disclosure. In several embodiments, the touch display 10 is an optical touch display. The touch display 10 includes a support plate 100 , a touch panel 200 and a cover 300 . The touch panel 200 is located on the support plate 100 , and the cover plate 300 covers the touch panel 200 .

In various embodiments, the support plate 100 can be used to protect the touch panel 200 . The material of the support plate 100 includes a glass plate, a polymer substrate or a silicon backplane, but is not limited thereto. In multiple implementations, the touch panel 200 includes a plurality of elements arranged in a matrix, and the structure of the touch panel 200 will be described in detail later. In various embodiments, the material of the cover plate 300 includes a transparent insulating polymer material, such as polyethylene terephthalate, polyimide, polyethylene naphthalate, polyether Etherketone, polycarbonate, polypropylene, polyamide or polymethylmethacrylate, but not limited thereto. In various embodiments, the touch display 10 may further include an adhesive layer (not shown). The adhesive layer can be disposed between the support plate 100 and the touch panel 200 and/or between the touch panel 200 and the cover plate 300 . In some embodiments, the material of the adhesive layer includes optically clear adhesive (OCA) and optically clear resin (OCR).

FIG. 2 shows a cross-sectional view of the touch panel 200 of the touch display 10 according to some embodiments of the present disclosure. In various embodiments of the present disclosure, the touch panel 200 includes a substrate 210 and a plurality of touch units 20 disposed on the substrate 210 . In order to simplify the drawing, only one touch unit 20 is shown in FIG. 2 . In some embodiments of the present disclosure, the substrate 210 includes a thin film transistor substrate, a glass substrate, a flexible substrate, a plastic substrate, a printed circuit board, etc., but not limited thereto.

The touch units 20 can be arranged in a one-dimensional arrangement or a two-dimensional arrangement. In some embodiments of the present disclosure, the touch units 20 are arranged in an array. For easy understanding, FIG. 2 schematically shows an exemplary arrangement of a touch unit 20 in the X direction. In some embodiments of the present disclosure, the area of each touch unit 20 is, for example, less than or equal to 0.2mm×0.2mm ² . It is worth noting that by controlling the area of each touch unit 20 to the above-mentioned size, the poor touch problem at the splicing seam in the traditional touch display can be solved. Specifically, generally, the touch area of a user's finger is 3-10mm ² , which is much larger than the area of each touch unit 20 mentioned above (ie, less than or equal to 0.2mm x 0.2mm ² ), so it can be seen in this disclosure The design can effectively overcome the problem of poor touch control at the splicing seams in traditional touch displays.

Each touch unit 20 includes a plurality of display light emitting elements 220 , an infrared light emitting element 230 , an infrared light sensor 240 , and a light sensor 250 . A plurality of display light emitting elements 220 are arrayed on the substrate 210 . A light emitting direction of the display light-emitting element 220 is toward a user, for example, in the Z direction. In some embodiments, the display light emitting element 220 includes a monochrome light emitting diode, a multicolor light emitting diode (RGB LED), a submillimeter light emitting diode (mini LED) and a micro light emitting diode (micro LED).

The infrared light emitting elements 230 are disposed between the display light emitting elements 220 . In the embodiment shown in FIG. 2 , the infrared light emitting element 230 is interposed between the two display light emitting elements 220 , but the present disclosure is not limited thereto. A light emitting direction of the infrared light emitting element 230 is toward the user, for example, in the Z direction. In multiple implementations of the present disclosure, a single display light emitting element 220 and a single infrared light emitting element 230 may be arranged at equal intervals or at unequal intervals.

The infrared light emitting element 230 has a first field of view FOV1. In various embodiments of the present disclosure, the touch display 10 further includes a first lens 260 disposed on the infrared light emitting element 230 . The light emitted by the infrared light emitting element 230 is regulated by the first lens 260 and exits from a light emitting surface of the first lens 260 , thereby forming a first field of view FOV1 of the infrared light emitting element 230 . In some embodiments of the present disclosure, the first field of view FOV1 and the depth of field of the infrared light emitting element 230 can be controlled by adjusting a working distance (also referred to as focus distance) of the first lens 260 , but is not limited thereto. The depth of field range will be further explained later.

The infrared light sensor 240 is disposed between the display light emitting elements 220 . In an embodiment shown in FIG. 2 , the infrared light sensor 240 is interposed between the two display light emitting elements 220 , but the disclosure is not limited thereto. In multiple implementations of the present disclosure, a single display light emitting element 220 and a single infrared light sensor 240 may be arranged at equal intervals or at unequal intervals. In various embodiments of the present disclosure, the infrared light sensor 240 is configured to sense invisible light, such as infrared light. The infrared light sensor 240 may include, for example, a complementary metal oxide semiconductor (CMOS) sensor and/or a charge-coupled device (CCD) sensor, but is not limited thereto.

The infrared light sensor 240 has a second field of view FOV2. In various embodiments of the present disclosure, the touch display 10 further includes a second lens 270 , and the second lens 270 is disposed on the infrared light sensor 240 . In some embodiments of the present disclosure, the second field of view FOV2 and a working distance of the infrared sensor 240 can be controlled by adjusting the second lens 270 , but is not limited thereto.

In various embodiments of the present disclosure, the light sensor 250 is disposed between the display light emitting elements 220 . In an embodiment of the present disclosure, at least one of the display light emitting elements 220 is interposed between the light sensor 250 and the infrared light emitting element 230 . In another embodiment of the present disclosure, at least one of the light emitting elements 220 is interposed between the light sensor 250 and the infrared light sensor 240 . A single display light emitting element 220 and a single light sensor 250 may be arranged at equal intervals or at unequal intervals. In various embodiments of the present disclosure, the light sensor 250 is configured to sense ambient light. The light sensor 250 may include, for example, a complementary metal oxide semiconductor (CMOS) sensor and/or a charge-coupled device (CCD) sensor, but is not limited thereto.

It is worth noting that in this disclosure, by disposing the positions of the infrared light emitting element 230 and the infrared light sensor 240, the first field of view FOV1 of the infrared light emitting element 230 and the second field of view FOV2 of the infrared light sensor 240 have an overlapping region OR. In various embodiments of the present disclosure, the overlapping region OR includes a depth of field DOF. The depth of field DOF may, for example, be located in the upper portion of the overlapping area OR, but is not limited thereto.

In some embodiments of the present disclosure, in the Z direction, a projected area (not shown) of the depth of field DOF is greater than or equal to a touch area (not shown) of a user's finger. In an embodiment, a projected area of the depth of field DOF in the Z direction is, for example, about a circle, which has a diameter of, for example, about 2-20 mm, preferably about 5-10 mm.

In a first touch mode, the infrared light emitting element 230 is configured to emit an infrared light signal within the first field of view FOV1, and when the infrared light signal arrives at the user's position in the depth of field DOF, the infrared light sensor 240 is configured to receive infrared light signals reflected from the user's position and output sensing signals. Specifically, in the first touch mode, when the user's finger is placed within the depth of field range DOF, the user's finger reflects the light emitted from the infrared light emitting element 230, and the infrared light sensor 240 receives the light emitted from the user's finger. The infrared light reflected by the finger, thus forming an image. In other words, by placing the user's finger within the DOF range, the user can float and touch the touch display 10 of the present disclosure. The first touch mode can also be called a floating touch mode.

It is worth noting that when the user's finger is placed within the depth of field DOF, the imaging quality of the infrared light reflection is the best. And when the user's finger is not located within the depth of field range DOF, the infrared light sensor 240 cannot receive the infrared light reflected from the user's finger, so an image cannot be formed. In other words, if the user's finger leaves the DOF range, the floating touch will not occur.

In some embodiments of the present disclosure, there is a first distance d1 between the depth of field DOF and the first lens 260 , and there is a second distance d2 between the depth of field DOF and the second lens 270 . In some embodiments of the present disclosure, a height h of the depth of field DOF can be controlled by adjusting the first distance d1 and the second distance d2. In some embodiments of the present disclosure, the first distance d1 may be 2 cm to 10 cm, such as 4 cm, 6 cm or 8 cm. In various embodiments of the present disclosure, the second distance d2 may be 2 cm to 10 cm, such as 4 cm, 6 cm or 8 cm. It is worth noting that when the first distance d1 and the second distance d2 are within the above range, the imaging quality of the hover touch can be improved.

In various embodiments of the present disclosure, in a second touch mode, the infrared light emitting element 230 does not emit an infrared light signal, and the light sensor 250 is configured to receive ambient light such as visible light and output a sensing signal. Specifically, in the second touch mode, the user actually touches the touch display 10, and the light sensor 250 senses the luminance collected above it and generates a corresponding sensing signal, so that the user can A general touch operation is performed on the touch display 10 . The second touch mode can also be referred to as a general touch sensing mode.

FIG. 3 shows an exemplary arrangement of touch units in the touch panel 200A of the touch display 10 according to an embodiment of the present disclosure. In the embodiment shown in FIG. 3 , a plurality of display light emitting elements 220 can be arranged along the X direction (eg, horizontal direction). In addition, a plurality of infrared light emitting elements 230 may be arranged along the X direction (for example, the horizontal direction). In one embodiment, at least one display light emitting element 220 is disposed between any two infrared light emitting elements 230 . In addition, one or more infrared light sensors 240 and/or one or more light sensors 250 can also be arranged along the X direction (eg, horizontal direction). In one embodiment, at least one display light emitting element 220 is disposed between the infrared light sensor 240 and the light sensor 250 . In another embodiment, at least one display light emitting element 220 is disposed between any two infrared light sensors 240 .

FIG. 4 shows an exemplary arrangement of touch units in the touch panel 200B of the touch display 10 according to another embodiment of the present disclosure. In the embodiment shown in FIG. 4 , a plurality of display light emitting elements 220 can be arranged along an oblique direction. In some embodiments, there is an included angle (not shown) between the oblique direction and the horizontal direction (such as the X direction), and the included angle may be greater than 0 degrees and less than 90 degrees, such as 20 degrees, 40 degrees, 60 degrees, or 80 degrees, but not limited to. In some embodiments, there is an included angle (not shown) between the oblique direction and the vertical direction (such as the Y direction), and the included angle may be greater than 0 degrees and less than 90 degrees, such as 20 degrees, 40 degrees, 60 degrees, or 80 degrees, but not limited to.

In addition, in some implementations, a plurality of infrared light emitting elements 230 can be arranged along the oblique direction. In one embodiment, at least one display light emitting element 220 is disposed between any two infrared light emitting elements 230 . In addition, one or more infrared light sensors 240 and/or one or more light sensors 250 can also be arranged along the oblique direction. In one embodiment, at least one display light emitting element 220 is disposed between the infrared light sensor 240 and the light sensor 250 . In another embodiment, at least one display light emitting element 220 is disposed between any two infrared light sensors 240 .

Please still refer to Fig. 2 now. In various embodiments of the present disclosure, the touch display 10 further includes a driving element 280 . In an embodiment of the present disclosure, the driving element 280 is disposed between the substrate 210 and the display light emitting element 220 . In another embodiment of the present disclosure, the driving element 280 is disposed between the substrate 210 and the infrared light emitting element 230 . In yet another embodiment of the present disclosure, the driving element 280 is disposed between the substrate 210 and the infrared light sensor 240 . In yet another embodiment of the present disclosure, the driving element 280 is disposed between the substrate 210 and the light sensor 250 .

In an embodiment of the present disclosure, the driving element 280 includes a thin film transistor (TFT). In an embodiment, the thin film transistors may be a plurality of thin film transistors disposed on a plane (for example, located on a plane in the X direction). The thin film transistor can selectively drive the display light emitting element 220 , the infrared light emitting element 230 , the infrared light sensor 240 and/or the light sensor 250 by controlling the current flowing in the display light emitting element 220 . In other words, the thin film transistor can be used as a switch for controlling the display light emitting element 220 , the infrared light emitting element 230 , the infrared light sensor 240 and/or the light sensor 250 .

In one embodiment, the substrate 210 may be, for example, a glass substrate and coupled to an electrode layer, wherein the electrode layer includes a plurality of thin film transistors. In this embodiment, the substrate 210 of the touch display 10 of the present disclosure may be connected to a chip (not shown), for example, through chip on glass (Chip On Glass, COG) packaging technology, so as to reduce the volume after packaging and Improve yield.

In another embodiment, the substrate 210 may be, for example, a flexible substrate, and a circuit is formed on the flexible substrate. In this embodiment, the substrate 210 of the touch display 10 of the present disclosure may be connected to a chip ( not shown), in order to reduce the packaged volume and improve the yield.

In another embodiment of the present disclosure, the driving element 280 includes a driving chip to form a circuit on the substrate 210 . The driving element 280 may include a micro driver IC, but is not limited thereto. In one embodiment, the display light-emitting element 220 , the infrared light-emitting element 230 , the infrared light sensor 240 and/or the light sensor 250 can be controlled and selectively driven by IC trimming. For example, a fuse can be used in a circuit (such as a hybrid circuit) to adjust the resistance and capacitance of the circuit, so as to precisely adjust the accuracy of the voltage/current reference source, so as to achieve different output control specifications. FIG. 5 and FIG. 6 respectively illustrate an exemplary method of zone-controlling the touch panel 200 of the touch display 10 according to different embodiments of the present disclosure. In FIG. 5 , the touch panel 200 of the touch display 10 includes a first region R1 and a second region R2 . For example, the first region R1 includes four display light emitting elements 220 and one infrared light emitting element 230 , and the second region R2 includes four display light emitting elements 220 and one infrared light sensor 240 . In FIG. 6 , the touch panel 200 of the touch display 10 includes a third region R3 and a fourth region R4 . The third region R3 includes three display light emitting elements 220 and one infrared light emitting element 230 , and the fourth region R4 includes three display light emitting elements 220 and an infrared light sensor 240 . The numbers and types of components included in the first subregion R1 to the fourth subregion R4 are for illustrative purposes only, and those skilled in the art can make changes according to actual needs without violating the spirit of the present disclosure.

In various embodiments of the present disclosure, the touch display 10 may be connected to an external control unit. Please refer to FIG. 7 and FIG. 8 at the same time, which schematically illustrate exemplary driving methods of different touch modes of the touch display 10 according to some embodiments of the present disclosure. As shown in FIG. 7 , the control unit 30 includes a processor 310 and a timing controller 320 . The processor 310 is connected to a timing controller 320 . Specifically, in one embodiment, the processor 310 transmits an instruction to the timing controller 320 . For example, the command can be input signal (Input Signal, IS), horizontal synchronization signal (H _sync ), vertical synchronization signal (V _sync ), master clock signal (Master Clock, MCLK), scan control signal, data control signal , Luminous control signals, etc. In multiple embodiments, the processor 310 includes at least one of a central processing unit, a communication processor, or an Advanced Reduced Instruction Set (RISC) Machine (Advanced RISC Machine, ARM) processor, but is not limited thereto.

In multiple implementations, the timing controller 320 receives instructions from the processor 310 and controls the driver 330 accordingly. For example, the timing controller 320 can control the driver 330 according to an instruction, so that the driver 330 controls the turning on and off of the light emitting element 340 . The driver 330 can be, for example, the above-mentioned driving element 280 , and the light-emitting element 340 can, for example, include the above-mentioned display light-emitting element 220 and infrared light-emitting element 230 , but is not limited thereto. Specifically, the driver 330 provides a control signal to control a plurality of control lines (not shown) formed on the front surface of the thin film transistor substrate, and may transmit the provided control signal to each light emitting element 340 connected to the corresponding wiring (not shown). Through the above method, the touch display 10 can be controlled to enter the display mode 410 , the normal touch sensing mode 420 , or the floating touch sensing mode 430 , as shown in FIG. 8 .

For example, in one embodiment, the processor 310 transmits instructions to the timing controller 320, and the timing controller 320 controls the driver 330 to turn on the display light-emitting element 220 and the light sensor 250, so that the display enters the display mode 410 or normal Touch sensing mode 420 . In another embodiment, the processor 310 transmits instructions to the timing controller 320, and the timing controller 320 controls the driver 330 to turn on the infrared light emitting element 230 and the infrared light sensor 240, so that the display enters the floating touch sensing mode 430 . The above operations are for illustrative purposes only, and those skilled in the art may make changes according to actual needs without violating the spirit of the present disclosure.

To sum up, this disclosure introduces the infrared light emitting element 230 and the infrared light sensor 240 into the touch display 10, and makes the infrared light emitting element The first field of view FOV1 of the infrared sensor 230 and the second field of view FOV2 of the infrared sensor 240 have an overlapping area OR, wherein the overlapping area OR includes a depth of field DOF. When the user's finger is placed within the depth of field range DOF, the user's finger reflects the light emitted from the infrared light emitting element 230, and the infrared light sensor 240 receives the infrared light reflected from the user's finger, thereby forming an image. . In other words, the present disclosure introduces a novel technical means of three-dimensional imaging in the touch display 10 . Accordingly, the user can perform floating touch on the touch display 10, which means that the user can operate the touch display 10 without actually touching the display surface of the touch display 10, thereby further expanding the applicability of the touch display 10. .

In addition, when the user's finger is within the depth of field DOF, the infrared light emitting element 230 and the infrared sensor 240 can have a good imaging effect, and are less likely to be affected by external ambient light when the floating touch mode is executed. In other words, by setting the depth of field DOF, the hovering touch mode of the touch display 10 of the present disclosure has good sensitivity.

Although the present invention has been disclosed as above in terms of implementation, the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. All kinds of equivalent changes and modifications should fall within the scope of the present invention, so the scope of protection of the present invention should be defined by the scope of the appended patent application.

10: Touch display 20:Touch unit 30: Control unit 100: support plate 200: touch panel 200A: touch panel 200B: Touch panel 300: cover plate 210: Substrate 220: display light-emitting components 230: Infrared light emitting element 240: Infrared light sensor 250: light sensor 260: first lens 270: second lens 280: drive element 300: cover plate 310: Processor 320: timing controller 330: drive 340: light emitting element 410: display mode 420: General touch sensing mode 430: Floating touch sensing mode DOF: depth of field range FOV1: first field of view FOV2: second field of view OR: overlapping area R1: the first partition R2: second partition R3: the third partition R4: the fourth partition X: direction Y: Direction Z: Direction d1: first distance d2: the second distance h: height

In order to make the above and other objects, features, advantages and implementations of the present invention more clearly understood, the detailed description of the accompanying drawings is as follows: FIG. 1 shows an exploded view of a touch display according to some embodiments of the present disclosure. FIG. 2 illustrates a cross-sectional view of a touch panel of a touch display according to some embodiments of the present disclosure. FIG. 3 shows an exemplary arrangement of touch units in a touch panel of a touch display according to an embodiment of the present disclosure. FIG. 4 shows an exemplary arrangement of touch units in a touch panel of a touch display according to another embodiment of the present disclosure. FIG. 5 and FIG. 6 respectively illustrate an exemplary method of zone-controlled touch panels of a touch display according to different embodiments of the present disclosure. FIG. 7 and FIG. 8 schematically illustrate exemplary driving methods of different touch modes of a touch display according to some embodiments of the present disclosure.

Domestic deposit information (please note in order of depositor, date, and number) none Overseas storage information (please note in order of storage country, institution, date, and number) none

20:Touch unit

200: touch panel

210: Substrate

220: display light-emitting components

230: Infrared light emitting element

240: Infrared light sensor

250: light sensor

260: first lens

270: second lens

280: drive element

DOF: depth of field range

FOV1: first field of view

FOV2: second field of view

OR: overlapping area

X: direction

Z: Direction

d1: first distance

d2: the second distance

h: height

Claims (11)

A touch display comprising: a substrate; A plurality of display light-emitting elements are arrayed on the substrate; an infrared light-emitting element, arranged between the display light-emitting elements, and has a first field of view; and An infrared light sensor is arranged between the display light-emitting elements and has a second viewing range, wherein the first viewing range and the second viewing range have an overlapping area. The touch display as described in claim 1 further includes a light sensor, the light sensor is arranged between the display light emitting elements, and at least one of the display light emitting elements is sandwiched between the light sensor Between the detector and the infrared light emitting element or the infrared light sensor. The touch display according to claim 1, wherein in a touch mode, the infrared light emitting element does not emit an infrared light signal, and the light sensor is configured to receive a visible light and output a sensing signal. The touch display according to claim 1, wherein the overlapping area includes a depth of field range, and in a touch mode, the infrared light emitting element is configured to emit an infrared light signal within the first field of view range, and when the After the infrared light signal arrives at a user's position in the depth of field range, the infrared light sensor is configured to receive the infrared light signal reflected from the user's position and output a sensing signal. The touch display according to claim 1 further includes a lens disposed on the infrared light emitting element. The touch display according to claim 1 further includes a lens disposed on the infrared light sensor. The touch display according to claim 5 or 6, wherein the overlapping area includes a depth of field range, and a distance between the depth of field range and the lens is 2 cm to 10 cm. The touch display according to claim 1 further includes a thin film transistor disposed between the substrate and the infrared light sensor. The touch display according to claim 1 further includes a thin film transistor disposed between the substrate and the infrared light emitting element. The touch display according to claim 1 further includes a driving chip disposed between the substrate and the infrared light emitting element. The touch display according to claim 1 further includes a driving chip disposed between the substrate and the infrared sensor.

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