Touch display screen

Abstract

The present application provides a touch display screen, comprising: a display panel; a touch device located at the light emitting side of the display panel, and the touch device has a touch surface, comprising: a light emitting component for providing at least positioning light and at least high-energy light; a light receiver for detecting the light change amount of the positioning light on the touch surface due to touch, for determining the position of the touch on the touch surface; a biological sensor for determining whether a living body is close to the touch surface; and a controller for driving the light emitting component to selectively provide the positioning light and / or the high-energy light to the touch surface according to the judgment of the biological sensor. The present application can provide the ultraviolet light sterilization function of the touch panel while preventing the user from being negatively affected by the ultraviolet light during the touch operation, and saving the power consumption of the touch display screen.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a touch display screen. Background Technology

[0002] With the development of technology, electronic products have become an indispensable part of people's lives. Among the many product categories, electronic products with touch screens are particularly popular, such as tablets, smartphones, and smartwatches.

[0003] However, when operating a touch screen, users need to constantly touch the screen with their fingers or repeatedly slide their fingers across it, which can easily lead to the growth and accumulation of bacteria or viruses on the screen, thus causing problems that affect personal hygiene.

[0004] Therefore, it is necessary to design a new type of touch display screen to overcome the above-mentioned defects. Summary of the Invention

[0005] The purpose of this invention is to provide a touch display screen that can provide ultraviolet light sterilization function for the touch panel while preventing users from being negatively affected by ultraviolet light during touch operation, and saving power consumption of the touch display screen.

[0006] To achieve the above objectives, the present invention provides a touch display screen, comprising: a display panel; a touch device located on the light-emitting side of the display panel, the touch device having a touch surface, comprising: a light-emitting component for providing positioning light and high-energy light; a light receiver for detecting the amount of light change caused by the positioning light on the touch surface due to touch, for determining the position of the touch on the touch surface; a biosensor for determining whether a living organism is approaching the touch surface; and a controller for driving the light-emitting component to selectively provide the positioning light and / or the high-energy light to the touch surface according to the determination of the biosensor.

[0007] Preferably, the light-emitting component includes: a first light source for providing the positioning light; and a second light source for providing the high-energy light.

[0008] Preferably, the light-emitting component further includes a switching element for connecting the first light source and the second light source, wherein the switching element is turned on or off by the controller based on the judgment of the biosensor.

[0009] Preferably, the controller changes the wavelength of the positioning light by controlling the voltage applied to the first light source; or the controller changes the brightness of the positioning light by controlling the current flowing through the first light source.

[0010] Preferably, the light-emitting component includes: a light source; and a wavelength modulator for modulating the output wavelength of the light source to provide the positioning light and the high-energy light.

[0011] Preferably, the wavelength modulator includes a voltage / current modulator, which the controller modulates the input power applied to the light source based on the judgment of the biosensor, so as to change the output wavelength of the light source.

[0012] Preferably, the biosensor determines whether a living organism is approaching the touch surface by measuring the change in physical quantity of a preset safe distance extending outward from the touch surface.

[0013] Preferably, the biosensor includes one or more of a proximity sensor, a light sensor, a temperature sensor, an image sensor, and an audio sensor.

[0014] Preferably, the wavelength of the positioning light is greater than the wavelength of the high-energy light; wherein the high-energy light has a wavelength between 200 nanometers and 400 nanometers.

[0015] Preferably, when the biosensor determines that the organism is close to the touch surface, the controller drives the light-emitting component to provide the positioning light to the touch surface and stops providing the high-energy light to the touch surface; and when the biosensor determines that the organism is not close to the touch surface, the controller drives the light-emitting component to provide the high-energy light to the touch surface.

[0016] Compared with existing technologies, the touch display screen provided by this invention includes a display panel, a touch device employing an optical touch panel, a biosensor, and a controller. The touch device includes a light-emitting component that can provide two or more different wavelengths of light. The longer wavelength light can be used as the touch positioning light for the optical touch panel; the shorter wavelength high-energy light has a bactericidal function and can be used to irradiate the touch surface of the optical touch panel. The biosensor determines whether a living organism is near the touch surface, and the controller, based on the biosensor's determination, selectively activates or deactivates the light-emitting units in the light-emitting component, or modulates the voltage / current of the light-emitting units in the light-emitting component, so that it can provide the positioning light and / or high-energy light required by the optical touch panel to the touch surface at appropriate points. This provides the touch panel with ultraviolet sterilization while preventing users from being negatively affected by ultraviolet light during touch operations, and also saves power consumption of the touch display screen. Attached Figure Description

[0017] Figure 1 A top view of the touch display screen provided in an embodiment of the present invention;

[0018] Figure 2 A perspective structural diagram of a touch display screen provided in an embodiment of the present invention;

[0019] Figure 3 This is a top view of a touch display screen provided in another embodiment of the present invention. Detailed Implementation

[0020] To provide a further understanding of the purpose, structure, features and functions of the present invention, detailed descriptions are provided below with reference to embodiments.

[0021] Certain terms are used in the specification and claims to refer to specific elements. It will be understood by those skilled in the art that manufacturers may use different names to refer to the same element. This specification and claims do not distinguish elements by differences in name, but rather by differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to".

[0022] Please refer to Figure 1 , Figure 1 This is a top view schematic diagram illustrating a touch display screen 100 according to an embodiment of the present invention. The touch display screen 100 includes a display panel 110, a touch device 101, a biosensor 102, and a controller 103.

[0023] In some embodiments of this specification, the display panel 110 may be one of a Liquid Crystal Display (LCD) panel, an Organic Light-Emitting Diode (OLED) panel, a Micro LED panel, an Electronic Paper Display (EPD) panel, or an Electronic Ink (E-Ink) display panel. In this embodiment, the display panel 110 may be a liquid crystal display panel built into a mobile phone. However, the form and type of the display panel 110 are not limited thereto; any display screen or media built into any electronic product for displaying images does not depart from the spirit and scope of the display panel 110 described in this specification. For example, in another embodiment, the display panel 110 may also be a display panel for fixed or movable indoor or outdoor large billboards.

[0024] A touch device 101 is disposed on the light-emitting side 110a of the display panel 110 for displaying images. The touch device 101 can be an optical touch panel having a touch surface 101a and further including at least one light-emitting component 101b and at least one light receiver 101c. The light-emitting component 101b provides at least one positioning light beam Ls and at least one high-energy light beam Lh; wherein the wavelength of the positioning light beam Ls is substantially greater than the wavelength of the high-energy light beam Lh. The light receiver 101c detects the amount of light change on the touch surface 101a caused by the positioning light beam Ls (or the high-energy light beam Lh, or a combination thereof) in response to the touch of a user U or other object, to determine the position P of the user U's touch point on the touch surface 101a.

[0025] For example, in some embodiments of this specification, the touch device 101 can be a laser optical touch panel, using a light-emitting component 101b disposed on either side (e.g., the left and lower sides) of the touch surface 101a to provide multiple laser beams as positioning rays Ls; and a light receiver 101c disposed on the corresponding side (e.g., the right and upper sides) of the touch surface 101a to receive the positioning rays Ls. When a user U or other object touches position P on the surface of the touch surface 101a, part of the positioning rays Ls that originally passed through position P will be blocked, scattered, absorbed, or interfered with, causing a change in the amount of positioning ray Ls signal (e.g., optical density, optical spectrum, or a combination of both) received by the light receiver 101c, thereby determining the coordinates of position P on the touch surface 101a.

[0026] In this embodiment, the light-emitting component 101b may include at least one first light source, such as multiple infrared light-emitting units 101bR, arranged on either side (e.g., the left and lower sides) of the touch surface 101a to provide multiple infrared beams (wavelengths between 760 nanometers (nm) and 1 millimeter (mm)) as positioning rays Ls, forming a light grid pattern. When the user U touches position P on the touch surface 101a, part of the positioning rays Ls that originally passed through position P will be blocked, causing the corresponding light receiver 101c to not receive the signal of that part of the positioning rays Ls, or causing a change in the total light density measured by all light receivers 101c, thereby determining the coordinates of position P on the touch surface 101a. The measured light change or coordinates are then immediately notified to the controller 103.

[0027] In some embodiments of this specification, the wavelength of the infrared beam (positioning ray Ls) emitted by each infrared emitting unit 101bR may be the same or different. In this embodiment, each infrared emitting unit 101bR emits an infrared beam (positioning ray Ls) with the same wavelength, and the wavelength of the positioning ray Ls is preferably about 850 nanometers.

[0028] In addition, the light-emitting component 101b also includes at least one second light source that can provide high-energy light Lh, such as multiple ultraviolet light-emitting units 101bP, interspersed among multiple infrared light-emitting units 101bR, which can emit multiple ultraviolet light beams (i.e., high-energy light Lh) with wavelengths between 10 nanometers and 400 nanometers to irradiate the touch surface 101a of the touch device 101 for sterilization. In some embodiments of this specification, a photocatalyst film (not shown) may also be disposed on the touch surface 101a of the touch device 101. When the ultraviolet light beam (i.e., high-energy light Lh) irradiates the photocatalyst film, it will trigger the photocatalyst film to sterilize the touch surface 101a of the touch device 101.

[0029] In this embodiment, the wavelength of the ultraviolet light beam (i.e., high-energy light Lh) emitted by each ultraviolet emitting unit 101bP may be the same or different. In this embodiment, the plurality of ultraviolet emitting units 101bP (second light sources) may include at least one long-wavelength ultraviolet emitting unit 101bPA capable of emitting long-wavelength ultraviolet (UVA) with a wavelength between 320 nm and 400 nm, at least one medium-wavelength ultraviolet emitting unit 101bPB capable of emitting medium-wavelength ultraviolet (UVB) with a wavelength between 280 nm and 320 nm, and at least one short-wavelength ultraviolet emitting unit 101bPC capable of emitting short-wavelength ultraviolet (UVC) with a wavelength between 100 nm and 280 nm.

[0030] It is worth noting that, although in Figure 1 For illustration only: Multiple ultraviolet light-emitting units 101bP and multiple infrared light-emitting units 101bR of the light-emitting component 101b are respectively and alternately arranged on one side of the touch surface 101a, but the arrangement and arrangement of the multiple ultraviolet light-emitting units 101bP and multiple infrared light-emitting units 101bR are not limited thereto. For example, in some embodiments, the ultraviolet light-emitting units 101bP and infrared light-emitting units 101bR can be integrated on the same substrate (not shown) to form a sub-light-emitting component (not shown) according to different design requirements, and then disposed on one side of the touch surface 101a.

[0031] The biosensor 102 can be built into the control circuit of the display panel 110 or can be set separately outside the display panel 110 and electrically connected to the touch device 101 and the controller 103 to determine whether a living being (e.g., user U) is approaching the touch surface 101a. The biosensor 102 operates by measuring the change in physical quantity extending outward from the touch surface 101a along the normal vector (not shown) perpendicular to the touch surface 101a for a preset safe distance (not shown) to determine whether a living being (e.g., user U) is approaching the touch surface 101a.

[0032] For example, in one embodiment of this specification, the biosensor 102 can be a proximity sensor that emits and receives electromagnetic fields or electromagnetic radiation (e.g., infrared beams) and compares changes in electric field or electromagnetic radiation reflection signals over a certain time interval to determine whether a living organism is approaching the touch surface 101a, whether or not it is in contact with an external living organism (e.g., user U).

[0033] In one embodiment of this specification, the biosensor 102 may also be a photometric sensor, which determines whether a living organism is approaching the touch surface 101a by sensing the amount of photometric change at a preset safe distance (not shown) from the touch surface 101a.

[0034] In one embodiment of this specification, the biosensor 102 may also be a temperature sensor, which determines whether a living organism is approaching the touch surface 101a by sensing the amount of temperature change at a preset safe distance (not shown) from the touch surface 101a.

[0035] In one embodiment of this specification, the biosensor 102 can also be an image recognition device, which can determine whether a living organism is approaching the touch surface 101a by capturing image data in front of the touch surface 101a and performing image comparison and analysis.

[0036] In one embodiment of this specification, the biosensor 102 may also be an audio sensor, which determines whether a living being is approaching the touch surface 101a by sensing the amount of sound change at a preset safe distance (not shown) from the touch surface 101a.

[0037] However, it is worth noting that the type and sensing method of the biosensor 102 are not limited to this, and multiple sensing methods can be combined. Furthermore, the placement of the biosensor 102 is not specific; for example, in some embodiments, the biosensor 102 can be placed anywhere on the light-emitting side 110a of the display panel 110. In this embodiment, the biosensor 102 can be placed on the touch surface 101a of the touch device 101. In other embodiments, the biosensor 102 can be disposed separately from the display panel 110.

[0038] The controller 103 can be built into the control circuit of the display panel 110 or can be set separately outside the display panel 110 and electrically connected to the biosensor 102, or further electrically connected to the touch device 101, so as to drive the light-emitting component 101b to selectively provide positioning light Ls and / or high-energy light Lh to the touch surface 101a according to the judgment of the biosensor 102.

[0039] For example, in this embodiment, since the high-energy light Lh used for sterilization may pose a potential hazard to the user U's skin or eyes, when the biosensor 102 determines that a living organism is approaching the touch surface 101a, the controller 103 can, based on the biosensor 102's determination, drive the light-emitting component 101b to activate only the multiple infrared light-emitting units 101bR (first light source) and deactivate the ultraviolet light-emitting unit 101bP (second light source). This ensures that the touch function of the touch device 101 can operate normally when the user U operates the touch display screen 100, while preventing the ultraviolet light beam (i.e., high-energy light Lh) emitted by the ultraviolet light-emitting unit 101bP (second light source) from directly irradiating the user U.

[0040] Conversely, when the biosensor 102 determines that no living organism is near the touch surface 101a, the controller 103 can, based on the determination of the biosensor 102, drive the light-emitting component 101b to turn on only the ultraviolet light-emitting unit 101bP (second light source) to irradiate the touch surface 101a of the touch device 101 for sterilization; and turn off multiple infrared light-emitting units 101bR (first light source) to save power of the touch display screen 100.

[0041] In this embodiment, the controller 103 can selectively turn on ultraviolet light emitting units 101bPA, 101bPB and 101bPC of different wavelengths based on the judgment of the biosensor 102 and considering the duration of no living organism approaching the touch surface 101a, and modulate the switching time of ultraviolet light emitting units 101bPA, 101bPB and 101bPC of various wavelengths.

[0042] However, the controller 103 is not limited to selectively providing positioning light Ls and / or high-energy light Lh to the touch surface 101a. In other embodiments, the controller 103 may selectively turn off or turn on only a portion of the infrared emitting unit 101bR (first light source) or ultraviolet emitting unit 101bP (second light source) based on the determination of the biosensor 102. In still other embodiments, the controller 103 may, according to a preset setting, change the wavelength of the positioning light Ls by controlling the voltage applied to the infrared emitting unit 101bR (first light source); or change the brightness of the positioning light Ls by controlling the amount of current flowing through the infrared emitting unit 101bR (first light source).

[0043] Please refer to Figure 2 , Figure 2 This is a perspective structural diagram of a touch display screen 200 according to an embodiment of the present invention. The structure of the touch display screen 200 is roughly the same as... Figure 1 The illustrated touch display screen 100 has a similar structure, with the main difference being the touch device 201 of the touch display screen 200. In this embodiment, the touch device 201 used by the touch display screen 200 is an imaging touch device 201.

[0044] The touch device 201 includes at least one infrared emitting unit 201bR (first light source), at least one ultraviolet emitting unit 201bP (second light source), and at least one infrared camera 201c disposed around the touch surface 201a. When a user U or other object approaches or touches position P of the touch surface 201a, a shadow blocking infrared light is generated at position P. At this time, the infrared camera 201c, acting as a light receiver, can use an image sensing element, such as a photodiode, a charge-coupled device (CCD), or an enhanced charge-coupled device (ICCD), to capture information such as the orientation, width, height, and apex of the shadow to determine the coordinates of position P on the touch surface 101a, thereby achieving the function of touch control.

[0045] The ultraviolet light-emitting unit 201bP (second light source) emits multiple ultraviolet beams with wavelengths between 10 nanometers and 400 nanometers, serving as high-energy light Lh to irradiate the touch surface 201a of the touch device 201 for sterilization. Since both the touch display screens 200 and 100 can use the biosensor 202 and the controller 203 to control the infrared light-emitting unit 201bR (first light source) and the ultraviolet light-emitting unit 201bP (second light source) in the touch device 201, their regulation and control methods are similar and will not be described further here.

[0046] Please refer to Figure 3 , Figure 3 This is a top view schematic diagram illustrating the structure of a touch display screen 300 according to an embodiment of the present invention. The structure of the touch display screen 300 is roughly the same as... Figure 1 The illustrated touch display screen 100 has a similar structure, the main difference being the structure and control method of the light-emitting component 301b in the touch device 301. In this embodiment, the touch device 301 has a touch surface 301a and includes multiple light-emitting components 301b and multiple light receivers 301c.

[0047] Multiple light-emitting components 301b are arranged on at least one side (e.g., the left and lower sides) of the touch surface 301a, and multiple light receivers 301c are disposed on one side (e.g., the right and upper sides) of the touch surface 301a corresponding to the multiple light-emitting components 301b, for receiving the light emitted by the light-emitting components 301b. Each light-emitting component 301b includes multiple electroluminescent units 301b1 and a wavelength modulator 301b2. The wavelength of the light emitted by the electroluminescent units 301b1 can be modulated in different ways. The modulator 301b2 is used to modulate the wavelength of the light output by the electroluminescent units 301b1, thereby providing at least one positioning light Ls or at least one high-energy light Lh.

[0048] For example, in this embodiment, each electroluminescent unit 301b1 may be an electroluminescent unit comprising, for example, aluminum gallium arsenide (AlGaAs), gallium nitride (GaN), indium gallium nitride (InGaN), aluminum indium gallium nitride (AlN), indium gallium nitride (AlGaN), or any combination thereof, a common-mode composite material. The wavelength modulator 301b2 includes a voltage / current modulator to modulate the input power applied to each electroluminescent unit 301b1 in response to a control signal provided by the controller 303, so that the electroluminescent unit 301b1 changes the wavelength of the light emitted from the electroluminescent unit 301b1 in response to the change in input power.

[0049] When the biosensor 102 detects that a living being is approaching the touch surface 301a, the controller 303 can modulate the input power applied to each electroluminescent unit 301b1 according to the biosensor 102's determination. This causes the electroluminescent unit 301b1 to emit infrared light with a wavelength substantially between 760 nanometers and 1 millimeter in response to the input power, serving as a positioning ray Ls. When the user U or other object touches position P on the touch surface 301a, part of the positioning ray Ls that originally passed through position P is blocked. This prevents the corresponding light receiver 301b2 from receiving the signal of that part of the positioning ray Ls, or causes a change in the amount of light density measured by the light receiver 301b2. This allows the controller to determine the coordinates of position P on the touch surface 301a, thereby providing the touch display screen 300 with touch functionality.

[0050] When the biosensor 102 determines that no living organism is approaching the touch surface 101a, the controller 303 can adjust the input power applied to each electroluminescent unit 301b1 according to the determination of the biosensor 102, so that the electroluminescent unit 301b1 emits ultraviolet light with a wavelength substantially between 100 nanometers and 400 nanometers in response to the input power, irradiating the touch surface 301a of the touch device 301 as a high-energy light Lh with bactericidal effect.

[0051] In some embodiments of this specification, the controller 303 may selectively modulate the input power applied to each electroluminescent unit 301b1 according to the duration of no living organism approaching the touch surface 101a, so that the electroluminescent unit 301b1 emits ultraviolet light of different wavelengths, such as long-wave ultraviolet (UVA), medium-wave ultraviolet (UVB), or short-wave ultraviolet (UVC), in response to the input power.

[0052] According to the above embodiments, this specification provides a touch display screen, including a display panel, a touch device employing an optical touch panel, a biosensor, and a controller. The touch device includes a light-emitting component that can provide two or more different wavelengths of light. The longer wavelength light can be used as the touch positioning light for the optical touch panel; the shorter wavelength high-energy light has a bactericidal function and can be used to irradiate the touch surface of the optical touch panel. The biosensor determines whether a living organism is near the touch surface, and the controller, based on the biosensor's determination, selectively activates or deactivates the light-emitting units in the light-emitting component, or modulates the voltage / current of the light-emitting units in the light-emitting component, so that it can provide the positioning light and / or high-energy light required by the optical touch panel to the touch surface at appropriate points. This provides the touch panel with ultraviolet sterilization while preventing users from being negatively affected by ultraviolet light during touch operations and saves power consumption of the touch display screen.

[0053] The present invention has been described in the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A touch display screen, characterized in that, The touch display screen includes: Display panel; A touch device is located on the light-emitting side of the display panel, and the touch device has a touch surface, the touch surface being provided with a photocatalytic film, including: Light-emitting components are used to provide positioning light and high-energy light. A light receiver detects the amount of light change caused by the positioning light on the touch surface due to a touch, and uses this to determine the position of the touch on the touch surface; A biosensor is used to determine whether a living organism is approaching the touch surface; and The controller, based on the determination of the biosensor, drives the light-emitting component to selectively provide the positioning light and / or the high-energy light to the touch surface; wherein, when the high-energy light irradiates the photocatalytic film, it triggers the photocatalytic film to sterilize the touch surface; The light-emitting component also includes an electroluminescent unit and a wavelength modulator. The wavelength modulator includes a voltage or current modulator. The controller modulates the input power applied to the electroluminescent unit according to the determination of the biosensor, thereby changing the wavelength of the light output by the electroluminescent unit to provide the positioning light and the high-energy light. The controller is also used to control the wavelength modulator to modulate the wavelength of the high-energy light according to the time interval determined by the biosensor when no living organism approaches the touch surface.

2. The touch display screen as described in claim 1, characterized in that, The biosensor determines whether a living organism is approaching the touch surface by measuring the change in physical quantity that extends outward from the touch surface at a preset safe distance.

3. The touch display screen as described in claim 2, characterized in that, The biosensor includes one or more of the following: proximity sensor, light sensor, temperature sensor, image recognition sensor, and audio sensor.

4. The touch display screen as described in claim 1, characterized in that, The wavelength of the positioning light is greater than the wavelength of the high-energy light. The high-energy light has a wavelength between 200 nanometers and 400 nanometers.

5. The touch display screen as described in claim 1, characterized in that, When the biosensor determines that the living organism is close to the touch surface, the controller drives the light-emitting component to provide the positioning light to the touch surface and stops providing the high-energy light to the touch surface; as well as When the biosensor determines that the living organism is not close to the touch surface, the controller drives the light-emitting component to provide high-energy light to the touch surface.

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