TWI761119B - 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 present disclosure relates to a touch display.

With the evolution of technology, touch displays have suddenly become a commonly used user input device. In most public places (such as medical institutions, shopping malls, public transportation stations) more and more touch-sensitive 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 of the touch display.

However, in the existing optical touch display, in the current optical touch display using an embedded light-emitting diode type (In LED type) to realize optical touch, it is necessary for the user to actually touch the optical touch display. Only on the display surface, the optical touch display can detect the touch. In other words, limited by the existing technology, the current optical touch display, whether it is paired with a liquid crystal display (LCD), a sub-millimeter light-emitting diode (mini LED) or a micro light-emitting diode (micro LED), still cannot achieve floating touch. Novel application of control. Therefore, there is an urgent need for an optical touch capable of realizing floating touch.

The present 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. A plurality of display light-emitting element arrays 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 field of view, wherein the first field of view and the second field of view have an overlapping area.

In one or more embodiments 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 light-emitting element. Between infrared light-emitting elements or infrared light sensors.

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

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 reaches the depth of field After detecting the user's position in the range, the infrared light sensor is configured to receive the infrared light signal reflected from the user's position and output the sensing signal.

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

In one or more embodiments 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 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.

In one or more embodiments 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 embodiments 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 embodiments 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 embodiments 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 for the embodiments 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 embodiments disclosed below can be combined or substituted with each other under beneficial circumstances, and other embodiments can also be added to one embodiment without further description or explanation.

In the following description, numerous specific details are set forth in detail to enable the reader 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 shown schematically in the drawings for simplicity of illustration.

For a more detailed and complete description of the present disclosure, reference may be made to the accompanying drawings and the various embodiments described below, wherein the same numbers in the drawings represent the same or similar elements.

The terms "about", "approximately" or "approximately" as used herein are generally generally within about twenty percent, preferably within about ten percent, more preferably within about twenty percent of the error or range of the index value. is within about five percent.

The present disclosure provides a touch display 10 . FIG. 1 illustrates an exploded view of a touch display 10 according to some embodiments of the present disclosure. In various 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 plate 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 back plate, but is not limited thereto. In various embodiments, 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 and insulating polymer material, such as polyethylene terephthalate, polyimide, polyethylene naphthalate, polyether, polyethylene ether ketone, polycarbonate, polypropylene, polyamide or polymethyl methacrylate, but not limited thereto. In various embodiments, the touch display 10 may further include an adhesive layer (not shown). The adhesive layer may 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 illustrates 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 is 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 0.2 mm×0.2 mm ² . It is worth noting that, by controlling the area of each touch unit 20 to the above-mentioned size, the problem of poor touch at the splicing seam in the conventional touch display can be solved. Specifically, generally, the touch area of a user's finger is 3-10 mm ² , which is much larger than the area of each touch unit 20 described above (ie, less than or equal to 0.2 mm x 0.2 mm ² ). Therefore, the present disclosure can be seen. The design can effectively overcome the poor touch problem at the splicing seam in the traditional touch display.

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 arranged on the substrate 210 in an array. A light-emitting direction of the display light-emitting element 220 is a direction toward a user, for example, in the Z direction. In some embodiments, the display light-emitting element 220 includes single-color light-emitting diodes, multi-color light-emitting diodes (RGB LEDs), sub-millimeter light-emitting diodes (mini LEDs), and micro light-emitting diodes (micro LEDs).

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 sandwiched between 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 a direction toward the user, for example, in the Z direction. In various embodiments of the present disclosure, the single display light-emitting element 220 and the 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 , and the first lens 260 is disposed on the infrared light emitting element 230 . The light emitted by the infrared light emitting element 230 is adjusted by the first lens 260 and then 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 a depth of field of the infrared light emitting element 230 can be controlled by adjusting a working distance (also referred to as a focus distance) of the first lens 260 , but 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 sandwiched between the two display light-emitting elements 220 , but the present disclosure is not limited thereto. In various embodiments 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 light sensor 240 can be controlled by adjusting the second lens 270 , but 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 sandwiched between the light sensor 250 and the infrared light-emitting element 230 . In another embodiment of the present disclosure, at least one of the display light-emitting elements 220 is sandwiched between the light sensor 250 and the infrared light sensor 240 . The single display light-emitting element 220 and the 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 should be noted that in the present disclosure, the positions of the infrared light emitting element 230 and the infrared light sensor 240 are arranged so that 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 Has an overlapping region OR. In various embodiments of the present disclosure, the overlapping region OR includes a depth of field range DOF. The depth-of-field range DOF may be located, for example, in the upper portion of the overlap region 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 range DOF is greater than or equal to a touch area (not shown) of a user's finger. In one embodiment, a projected area of the depth of field DOF in the Z direction is, for example, a circle with 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 reaches the user's position in the depth of field DOF, the infrared light sensor 240 is configured to receive the infrared light signal reflected from the user's position and output the sensing signal. Specifically, in the first touch mode, when the user's finger is placed within the DOF range, 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 finger reflects the infrared light, thus forming an image. In other words, by placing the user's finger within the DOF range, the user can hover and touch the touch display 10 of the present disclosure. This first touch mode may also be referred to as a hovering touch mode.

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

In some embodiments of the present disclosure, there is a first distance d1 between the depth of field range DOF and the first lens 260 , and a second distance d2 between the depth of field range DOF and the second lens 270 . In some embodiments of the present disclosure, a height h of the depth of field range 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, for example, 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, for example, 4 cm, 6 cm or 8 cm. It should be noted that when the first distance d1 and the second distance d2 are within the above ranges, the imaging quality of the hovering 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 infrared light signals, and the light sensor 250 is configured to receive ambient light, such as visible light, and output sensing signals. Specifically, in the second touch mode, the user actually touches the touch display 10, and the light sensor 250 senses the light intensity collected above it and generates a corresponding sensing signal, so as to allow the user to A general touch operation is performed on the touch display 10 . The second touch mode may also be referred to as a general touch sensing mode.

FIG. 3 illustrates 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 may be provided along the X direction (eg, the horizontal direction). In addition, a plurality of infrared light emitting elements 230 may be disposed along the X direction (eg, 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 may also be disposed along the X direction (eg, the 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 illustrates 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 may be arranged along a diagonal direction. In some embodiments, there is an included angle (not shown) between the oblique line direction and the horizontal direction (eg, 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 this. In some embodiments, there is an included angle (not shown) between the oblique line direction and the vertical direction (eg, 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 this.

In addition, in some embodiments, a plurality of infrared light emitting elements 230 may be arranged along the diagonal 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 may also be disposed along the diagonal 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 Figure 2 for 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 one embodiment of the present disclosure, the driving element 280 includes a thin film transistor (TFT). In one embodiment, the thin film transistors may be a plurality of thin film transistors and are arranged on a plane (eg, 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 can be, for example, a glass substrate and is 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 can be connected to a chip (not shown) through, for example, Chip On Glass (COG) packaging technology, so as to reduce the packaged volume 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 can be connected to a chip ( not shown) to reduce package size and improve yield.

In another embodiment of the present disclosure, the driving element 280 includes a driving wafer to form circuits 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 partition by means of IC trimming. For example, a fuse can be used in a circuit (such as a hybrid circuit) to trim the resistance and capacitance of the circuit to precisely trim the accuracy of the voltage/current reference source to achieve different output control specifications. FIG. 5 and FIG. 6 respectively illustrate exemplary manners of partitioning 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 partition R1 and a second partition R2. For example, the first area R1 includes four display light-emitting elements 220 and one infrared light-emitting element 230 , and the second area 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 partition R3 and a fourth partition R4. The third area R3 includes three display light-emitting elements 220 and one infrared light-emitting element 230 , and the fourth area R4 includes three display light-emitting elements 220 and one infrared light sensor 240 . The numbers and types of elements included in the first partition R1 to the fourth partition R4 are only for illustrative purposes, and those with ordinary knowledge in the art can make changes as needed without departing from 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 manners 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 the timing controller 320 . Specifically, in one embodiment, the processor 310 transmits an instruction to the timing controller 320 . For example, the command can be an input signal (Input Signal, IS), a horizontal sync signal (H _sync ), a vertical sync signal (V _sync ), a master clock signal (Master Clock, MCLK), etc., a scan control signal, and a data control signal. , Luminous control signal, etc. In various 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 various embodiments, 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 the instruction, so that the driver 330 controls the light-emitting element 340 to be turned on and off. The driver 330 can be, for example, the above-mentioned driving element 280 , and the light-emitting element 340 can include, for example, the above-mentioned display light-emitting element 220 and the infrared light-emitting element 230 , but not limited thereto. Specifically, the driver 330 provides control signals to control a plurality of control lines (not shown) formed on the front surface of the thin film transistor substrate, and can transmit the provided control signals to each light-emitting element 340 connected to the corresponding line (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 an instruction 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 general Touch sensing mode 420 . In another embodiment, the processor 310 transmits an instruction 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 only for illustrative purposes, and those with ordinary knowledge in the art can make modifications as needed without departing from the spirit of the present disclosure.

To sum up, the present 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 230 and the infrared light emitting element 240 located by arranging the position of the infrared light emitting element. The first field of view FOV1 of 230 and the second field of view FOV2 of the infrared light sensor 240 have an overlapping area OR, wherein the overlapping area OR includes the depth of field DOF. When the user's finger is placed within the DOF range, 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 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 DOF range, the infrared light emitting element 230 and the infrared light sensor 240 can have a good imaging effect, and are not easily affected by external ambient light when the floating touch mode is executed. In other words, by setting the depth of field DOF, the floating touch mode of the touch display 10 of the present disclosure has good sensitivity.

Although the present invention has been disclosed in the above embodiments, the above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Anyone skilled in the art, without departing from the spirit and scope of the present invention, can make Various equivalent changes and modifications shall fall within the scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the appended claims.

10: Touch Monitor 20: Touch Unit 30: Control unit 100: support plate 200: touch panel 200A: touch panel 200B: Touch Panel 300: Cover 210: Substrate 220: Display light-emitting elements 230: Infrared light emitting element 240: Infrared light sensor 250: Light Sensor

280: Drive Components

300: Cover

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: first partition

R2: Second partition

R3: The third partition

R4: Fourth partition

X: direction

Y: direction

Z: direction

d1: first distance

d2: second distance

h: height

h: height

In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the detailed description of the accompanying drawings is as follows: FIG. 1 illustrates 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 illustrates an exemplary arrangement of touch units in a touch panel of a touch display according to an embodiment of the present disclosure. FIG. 4 illustrates 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 exemplary manners of zone-controlling the touch panel of the touch display according to different embodiments of the present disclosure. FIGS. 7 and 8 schematically illustrate exemplary driving manners of different touch modes of a touch display according to some embodiments of the present disclosure.

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

20: Touch Unit

200: touch panel

210: Substrate

220: Display light-emitting elements

230: Infrared light emitting element

240: Infrared light sensor

250: Light Sensor

260: First lens

270: Second lens

280: Drive Components

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: second distance

h: height

Claims (8)

A touch display, comprising: a substrate; a plurality of display light-emitting elements, arranged in an array on the substrate; an infrared light-emitting element, disposed between the display light-emitting elements and having a first field of view; a first lens , disposed on the infrared light-emitting element, the first lens is configured to form the first field of view of divergence; an infrared light sensor is disposed between the display light-emitting elements and has a second field of view; and a second lens disposed on the infrared light sensor, the second lens is configured to form the divergent second field of view; wherein the first field of view and the second field of view have an overlapping area, the overlapping area A depth of field range is included, and a distance between the depth of field range and the lens is 2cm to 10cm. The touch display of claim 1, further comprising 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 between the detector and the infrared light emitting element or the infrared light sensor. The touch display of claim 2, 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 of claim 1, wherein 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 reaches the depth of field range After a user position is located in the user position, the infrared light sensor is configured to receive the infrared light signal reflected from the user position and output a sensing signal. The touch display of claim 1, further comprising a thin film transistor disposed between the substrate and the infrared light sensor. The touch display of claim 1, further comprising a thin film transistor disposed between the substrate and the infrared light emitting element. The touch display of claim 1, further comprising a driving chip disposed between the substrate and the infrared light emitting element. The touch display of claim 1, further comprising a driving chip disposed between the substrate and the infrared light sensor.

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