CN112925444A - Touch control display - Google Patents

Touch control display Download PDF

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Publication number
CN112925444A
CN112925444A CN202110240386.3A CN202110240386A CN112925444A CN 112925444 A CN112925444 A CN 112925444A CN 202110240386 A CN202110240386 A CN 202110240386A CN 112925444 A CN112925444 A CN 112925444A
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CN
China
Prior art keywords
light emitting
display
touch
sensor
touch display
Prior art date
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Pending
Application number
CN202110240386.3A
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Chinese (zh)
Inventor
周贤颖
陈伯纶
陈俊达
廖致霖
魏福呈
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Interface Optoelectronics Shenzhen Co Ltd
Interface Technology Chengdu Co Ltd
Yecheng Optoelectronics Wuxi Co Ltd
General Interface Solution Ltd
Original Assignee
Interface Optoelectronics Shenzhen Co Ltd
Interface Technology Chengdu Co Ltd
Yecheng Optoelectronics Wuxi Co Ltd
General Interface Solution Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Interface Optoelectronics Shenzhen Co Ltd, Interface Technology Chengdu Co Ltd, Yecheng Optoelectronics Wuxi Co Ltd, General Interface Solution Ltd filed Critical Interface Optoelectronics Shenzhen Co Ltd
Priority to CN202110240386.3A priority Critical patent/CN112925444A/en
Priority to TW110108575A priority patent/TWI761119B/en
Publication of CN112925444A publication Critical patent/CN112925444A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Human Computer Interaction (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Position Input By Displaying (AREA)

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 plurality of display light-emitting element arrays are arranged on the substrate. The infrared light emitting elements are arranged among the display light emitting elements and provided with a first view range, the infrared light sensor is arranged among the display light emitting elements and provided with a second view range, and the first view range and the second view range are provided with an overlapping area. The touch display can realize suspension touch and has good imaging effect and sensitivity.

Description

Touch control display
Technical Field
The present disclosure relates to a touch display.
Background
With the development of technology, touch displays have become popular as user input devices. Touch displays are increasingly available to the public in most public places (e.g., medical institutions, malls, public transportation stations). In view of the above, if a user can operate the touch display without actually touching the display surface of the touch display, it would be a great advance of the touch display.
However, In the existing optical touch display using embedded light emitting diode (In LED type) to realize optical touch, the optical touch display needs the user to actually touch the display surface of the optical touch display, and the optical touch display can detect the occurrence of touch. In other words, limited by the prior art, the current optical touch display, whether it is equipped with a Liquid Crystal Display (LCD), a sub-millimeter light emitting diode (mini LED) or a micro LED, cannot realize the novel application of floating touch. Therefore, an optical touch device capable of performing floating touch is needed.
Disclosure of Invention
The disclosure provides a touch display, which includes a substrate, a plurality of display light emitting elements, an infrared light emitting element, and an infrared light sensor. The plurality of display light-emitting element arrays are arranged on the substrate. The infrared light emitting element is arranged between the display light emitting elements and has a first visual field range. The infrared light sensor is arranged between the display light-emitting elements and has a second visual field range, wherein the first visual field range and the second visual field range have an overlapping region.
In one or more embodiments of the present disclosure, the touch display further includes a light sensor 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 infrared light emitting element or the infrared light sensor.
In one or more embodiments of the present disclosure, in a touch mode, the infrared light emitting device 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 overlap area includes a depth of field range, in a touch mode, the ir light emitting device is configured to emit an ir light signal within a first range of view, and the ir light sensor is configured to receive the ir light signal reflected from the user position and output a sensing signal after the ir light signal reaches the user position within the depth of field range.
In one or more embodiments of the present disclosure, the touch display further includes a lens disposed on the infrared light emitting device.
In one or more embodiments of the present disclosure, the touch display further includes a lens disposed on the infrared 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 2cm 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 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 device.
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 device.
In one or more embodiments of the present disclosure, the touch display further includes a driving chip disposed between the substrate and the infrared sensor.
Drawings
In order to make the aforementioned and other objects, features, advantages and embodiments of the invention more comprehensible, the following detailed description is given:
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 6 respectively illustrate exemplary ways of controlling a touch panel of a touch display in a partitioned manner according to various embodiments of the present disclosure.
Fig. 7 and 8 schematically illustrate exemplary driving manners of different touch modes of a touch display according to some embodiments of the present disclosure.
Reference numerals:
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 element
230 infrared light emitting device 240 infrared light sensor
250 photo sensor 260 first lens
270, second lens 280, driving element
300 cover plate 310 processor
320 timing controller 330 driver
340 light emitting element 410 display mode
420, normal touch sensing mode 430, hover touch sensing mode
DOF depth of field range FOV1 first field of view range
FOV2 second field of view OR overlap region
R1 first partition R2 second partition
R3 third partition R4 fourth partition
X direction and Y direction
Z direction d1 first distance
d2 second distance h height
Detailed Description
In order to make the disclosure more complete and complete, the following description is provided for illustrative purposes of implementing aspects and embodiments of the invention; it is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The various embodiments disclosed below may be combined with or substituted for one another where appropriate, and additional embodiments may be added to one embodiment without further recitation or description.
In the following description, numerous specific details are set forth to provide a thorough understanding of 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 order to simplify the drawing.
For a fuller and complete description of the present disclosure, reference should be made to the accompanying drawings, in which like numerals represent the same or similar elements, and the various embodiments described below.
As used herein, the terms "about," "approximately," or "approximately" generally refer to a numerical error or range that is within about twenty percent, preferably within about ten percent, and more preferably 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 supporting plate 100, and the cover plate 300 covers the touch panel 200.
In various embodiments, the supporting board 100 may be used to protect the touch panel 200. The material of the support plate 100 includes, but is not limited to, a glass plate, a polymer substrate, or a silicon backplane. 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 insulating polymer material, such as polyethylene terephthalate, polyimide, polyethylene naphthalate, polyethersulfone, polyetherketone, polycarbonate, polypropylene, polyamide, or polymethyl methacrylate, but is 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 a 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. 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 may be arranged in a one-dimensional array or a two-dimensional array. In some embodiments of the present disclosure, the touch units 20 are arranged in an array. To make it easyIt should be understood that fig. 2 schematically illustrates an exemplary arrangement of the touch units 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 x 0.2mm2. It should be noted that by controlling the area of each touch unit 20 to be the above size, the problem of poor touch at the joint seam in the conventional touch display can be solved. Specifically, the finger touch area of the user is generally 3-10 mm2Which is much larger than the area of each touch unit 20 (i.e. less than or equal to 0.2mm x 0.2mm, for example)2) Therefore, it can be seen that the design of the present disclosure can effectively overcome the problem of poor touch at the joint seam in the conventional touch display.
Each touch unit 20 includes a plurality of display light emitting devices 220, an infrared light emitting device 230, an infrared sensor 240, and a light sensor 250. A plurality of display light emitting elements 220 are arranged in an array on the substrate 210. A light emitting direction of the display light emitting device 220 is toward a user, for example, in the Z direction. In some embodiments, the display light elements 220 include single color light emitting diodes (monochrome LEDs), 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 the two display light emitting elements 220, but the present disclosure is not limited thereto. An emitting direction of the infrared light emitting device 230 is 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 disposed at equal intervals or at unequal intervals.
The infrared light emitting elements 230 have a first field of view range FOV 1. 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 device 230. The light emitted by the ir light emitting device 230 is adjusted by the first lens 260 and then exits from a light exiting surface of the first lens 260, thereby forming a first field of view FOV1 of the ir light emitting device 230. In some embodiments of the present disclosure, the first field of view FOV1 and the depth of field of the ir led 230 can be controlled by adjusting a working distance (also referred to as a 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 devices 220. In one embodiment shown in fig. 2, the infrared light sensor 240 is sandwiched between two display light emitting elements 220, but the disclosure is not limited thereto. In various embodiments of the present disclosure, the single display light emitting element 220 and the single infrared light sensor 240 may be disposed 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 FOV 2. 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 ir light sensor 240 can be controlled by adjusting the second lens 270, but is not limited thereto.
In various embodiments of the present disclosure, the photo-sensor 250 is disposed between the display light emitting devices 220. In one embodiment of the present disclosure, at least one of the light emitting elements 220 is shown 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 light emitting elements 220 is shown sandwiched between the light sensor 250 and the infrared light sensor 240. The individual display light emitting elements 220 and the individual light sensors 250 may be disposed 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 photo-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 ir light emitting device 230 and the ir light sensor 240 are disposed at positions such that the first view range FOV1 of the ir light emitting device 230 and the second view range FOV2 of the ir light sensor 240 have an overlapping region OR. In various embodiments of the present disclosure, the overlap region OR includes a depth of field DOF. The depth of field range DOF may, for example, be located in an upper part of the overlap region OR, but is not limited thereto.
In some embodiments of the present disclosure, a projected area (not shown) of the depth of field DOF in the Z direction is greater than or equal to a finger-touch area (not shown) of the user. In one embodiment, a projected area of the depth of field DOF in the Z direction is, for example, approximately circular, having a diameter of, for example, approximately 2-20mm, preferably approximately 5-10 mm.
In a first touch mode, the ir light emitting device 230 is configured to emit ir light signals within the first field of view FOV1, and the ir light sensor 240 is configured to receive the ir light signals reflected from the user position and output sensing signals after the ir light signals reach the user position within the depth of field DOF. Specifically, in the first touch mode, when the user's finger is placed within the depth of field DOF, the user's finger reflects the light emitted from the ir light emitting device 230, and the ir light sensor 240 receives the reflected ir light from the user's finger, thereby forming an image. In other words, by placing the user's finger within the depth of field range DOF, the user can hover touch the touch display 10 of the present disclosure. The first touch mode may also be referred to as a floating touch mode.
It is noted that when the user's finger is placed within the depth of field DOF, the imaging quality of the infrared light reflection is best. When the user's finger is not located within the depth of field DOF, the IR sensor 240 cannot receive the reflected IR light from the user's finger, and thus cannot form an image. In other words, if the user's finger leaves the depth of field range DOF, no floating touch occurs.
In some embodiments of the present disclosure, the depth of field DOF has a first distance d1 from the first lens 260 and a second distance d2 from 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 d 2. In some embodiments of the present disclosure, the first distance d1 may be 2cm to 10cm, such as 4cm, 6cm, or 8 cm. In various embodiments of the present disclosure, the second distance d2 may be 2cm to 10cm, such as 4cm, 6cm, or 8 cm. It should be noted 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 device 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. In detail, in the second touch mode, the user actually touches the touch display 10, and the light sensor 250 senses the brightness converged thereon and generates a corresponding sensing signal, so as to enable the user to perform a general touch operation on the touch display 10. The second touch mode can 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 disclosure. In the embodiment shown in fig. 3, a plurality of display light emitting elements 220 may be disposed along the X direction (e.g., horizontal direction). Further, a plurality of infrared light emitting elements 230 may be disposed along the X direction (e.g., horizontal direction). In one embodiment, at least one display light emitting element 220 is disposed between any two infrared light emitting elements 230. One or more ir sensors 240 and/or one or more photosensors 250 may also be disposed along the X-direction (e.g., horizontal direction). In one embodiment, at least one display light emitting device 220 is disposed between the infrared light sensor 240 and the light sensor 250. In another embodiment, at least one display light emitting device 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 may be arranged along an oblique line direction. In some embodiments, the oblique line direction has an angle (not shown) with the horizontal direction (e.g., X direction), and the angle may be greater than 0 degree and less than 90 degrees, such as 20 degrees, 40 degrees, 60 degrees, or 80 degrees, but is not limited thereto. In some embodiments, the oblique line direction has an angle (not shown) with the vertical direction (e.g., Y direction), and the angle may be greater than 0 degree and less than 90 degrees, such as 20 degrees, 40 degrees, 60 degrees, or 80 degrees, but is not limited thereto.
In some embodiments, a plurality of infrared light emitting elements 230 may be arranged along an oblique line 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 be disposed along the diagonal direction. In one embodiment, at least one display light emitting device 220 is disposed between the infrared light sensor 240 and the light sensor 250. In another embodiment, at least one display light emitting device 220 is disposed between any two infrared light sensors 240.
Now please still refer to fig. 2. In various embodiments of the present disclosure, the touch display 10 further includes a driving device 280. In one 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 another embodiment of the present disclosure, the driving element 280 is disposed between the substrate 210 and the infrared light sensor 240. In another embodiment of the present disclosure, the driving element 280 is disposed between the substrate 210 and the photo 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 disposed on a plane (e.g., a plane in the X direction). The thin film transistor can selectively drive the display light emitting device 220, the infrared light emitting device 230, the infrared light sensor 240 and/or the photo sensor 250 by controlling the current flowing in the display light emitting device 220. In other words, the thin film transistor can be used as a switch for controlling the display light emitting device 220, the infrared light emitting device 230, the infrared light sensor 240 and/or the photo sensor 250.
In one embodiment, the substrate 210 may 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 a Chip On Glass (COG) packaging technology, for example, to reduce the volume after packaging and improve the yield.
In another embodiment, the substrate 210 may be a flexible substrate, for example, 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) through a Chip On Board (COB) packaging technology or a Chip On Film (COF) packaging technology, for example, so as to reduce the volume after packaging 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 (micro driver IC), but is not limited thereto. In one embodiment, the display light emitting device 220, the infrared light emitting device 230, the infrared light sensor 240 and/or the photo sensor 250 can be controlled and selectively driven by a partition control in a chip trimming (IC trimming) manner. For example, fuses (fuses) can be used in circuits (e.g., hybrid circuits) to trim the resistance and capacitance of the circuit to precisely trim the accuracy of the reference source of voltage/current to achieve different output control specifications. Fig. 5 and 6 respectively illustrate a manner of exemplarily controlling the touch panel 200 of the touch display 10 in a partitioned manner according to various 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 sub-section R1 includes four display light emitting devices 220 and one infrared light emitting device 230, and the second sub-section R2 includes four display light emitting devices 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 sub-section R3 includes three display light emitting devices 220 and one infrared light emitting device 230, and the fourth sub-section R4 includes three display light emitting devices 220 and one infrared light sensor 240. The number and types of the elements included in each of the first to fourth partitions R1-R4 are merely exemplary, and those skilled in the art can make modifications as required without departing from the spirit of the disclosure.
In various embodiments of the present disclosure, the touch display 10 may be connected to a control unit located outside. Referring to fig. 7 and 8, exemplary driving manners of different touch modes of the touch display 10 according to some embodiments of the disclosure are schematically illustrated. 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 a command to the timing controller 320. For example, the instruction may be an Input Signal (IS), a horizontal synchronization Signal (H)sync) Vertical synchronization signal (V)sync) A Master Clock (MCLK), a scan control signal, a data control signal, a light emission control signal, etc. In various embodiments, processor 310 includes at least one of a central processor, a communication processor, or an Advanced Reduced Instruction Set (RISC) Machine (ARM) processor, but is not so limited.
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 may control the driver 330 according to the instruction, so that the driver 330 controls the light emitting elements 340 to be turned on and off. The driver 330 may be, for example, the driving element 280, and the light-emitting element 340 may include, for example, the display light-emitting element 220 and the infrared light-emitting element 230, but is not limited thereto. Specifically, the driver 330 supplies control signals to control a plurality of control lines (not shown) formed on the front surface of the thin film transistor substrate, and may transmit the supplied control signals to each of the light emitting elements 340 connected to a corresponding line (not shown). Through the above manner, 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 a command to the timing controller 320, and the timing controller 320 controls the driver 330 to turn on the display light emitting device 220 and the photo sensor 250, so that the display enters the display mode 410 or the normal 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 ir light emitting device 230 and the ir light sensor 240, so that the display enters the floating touch sensing mode 430. The above-described operations are for illustrative purposes only and modifications as would be apparent to one of ordinary skill in the art are deemed to be within the spirit of the present disclosure.
In summary, the present disclosure introduces the ir light emitting device 230 and the ir light sensor 240 into the touch display 10, and arranges the ir light emitting device 230 and the ir light sensor 240 such that the first viewing range FOV1 of the ir light emitting device 230 and the second viewing range FOV2 of the ir light sensor 240 have an overlapping region OR, wherein the overlapping region OR includes the depth of field range DOF. When the user's finger is placed within the depth of field DOF, the user's finger reflects the light emitted from the IR light emitting device 230, and the IR sensor 240 receives the reflected IR light 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 finger of the user is located within the depth of field DOF, the ir light emitting device 230 and the ir light sensor 240 can have good imaging effect and are not easily affected by the external ambient light when the floating touch mode is executed. In other words, by setting the depth of field range DOF, the floating touch mode of the touch display 10 of the present disclosure has good sensitivity.
Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited to the above embodiments, but rather, may be embodied in many different forms and varied within the spirit and scope of the invention.

Claims (11)

1. A touch display, comprising:
a substrate;
a plurality of display light emitting elements arranged in an array on the substrate;
the infrared light emitting element is arranged between the display light emitting elements and has a first visual field range; and
the infrared sensor is arranged between the display light-emitting elements and is provided with a second visual field range, wherein the first visual field range and the second visual field range have an overlapping region.
2. The touch display of claim 1, further comprising a light sensor 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 infrared light emitting element or the infrared light sensor.
3. The touch display of claim 1, wherein in the touch mode, the infrared light emitting device does not emit an infrared light signal, and the light sensor is configured to receive visible light and output a sensing signal.
4. The touch display of claim 1, wherein the overlap region comprises a depth of field range, and in the touch mode, the ir light emitting element is configured to emit an ir light signal within the first field of view range, and the ir sensor is configured to receive the ir light signal reflected from the user position and output a sensing signal after the ir light signal reaches the user position within the depth of field range.
5. The touch display of claim 1, further comprising a lens disposed over the infrared light emitting element.
6. The touch display of claim 1, further comprising a lens disposed over the infrared sensor.
7. The touch display of claim 5 or 6, wherein the overlap region comprises a depth of field range, and the distance between the depth of field range and the lens is from 2cm to 10 cm.
8. The touch display of claim 1, further comprising a thin film transistor disposed between the substrate and the ir sensor.
9. The touch display of claim 1, further comprising a thin film transistor disposed between the substrate and the infrared light emitting device.
10. The touch display of claim 1, further comprising a driver chip disposed between the substrate and the infrared light emitting device.
11. The touch display of claim 1, further comprising a driver chip disposed between the substrate and the ir sensor.
CN202110240386.3A 2021-03-04 2021-03-04 Touch control display Pending CN112925444A (en)

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