Light beam transmitter and optical touch display system

Abstract

The embodiments of the present application disclose a light beam emitter and a light touch display system. The light beam emitter includes a main body, a first light source, a second light source, a power supply assembly, a touch sensor and a control module. The projection state of the light beam emitter includes a first projection state for projecting infrared light and a second projection state for projecting visible light. The control module is respectively connected to the power supply assembly, the touch sensor, the first light source and the second light source. The control module is used to control the projection state of the light beam emitter to switch between the first projection state and the second projection state according to different states of the touch sensor. The embodiments of the present application can combine remote interaction and proximal interaction in display panel touch technology, and have high recognition accuracy and accurate positioning.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a light beam emitter and an optical touch display system. Background Art

[0002] Display technology is widely used in various fields of society, and people's demand for interactive display technology is increasing. Touch display technology has been widely used in commercial applications, but it has the problem of being unable to interact remotely. One remote interaction technology is to use a camera to capture motion and analyze it, but its recognition accuracy is low, which will cause unresponsiveness, misoperation and other phenomena that seriously affect the user experience. Another remote interaction technology is the "air mouse", which can only identify relative positions and cannot intuitively feedback absolute position coordinates.

[0003] Near-end interaction usually uses a capacitive display panel for touch interaction, so this structure cannot perform remote interaction. There is an urgent need for a touch display system that can combine remote interaction and near-end interaction. Summary of the invention

[0004] The embodiments of the present application provide a light beam transmitter and an optical touch display system, which can combine remote interaction and near-end interaction, and have high recognition accuracy and accurate positioning.

[0005] The present application provides a light beam transmitter, including:

[0006] A main body, wherein a projection portion is provided on the main body;

[0007] A first light source disposed on the main body for emitting infrared light, and a second light source disposed on the main body for emitting visible light, wherein the projection state of the light beam emitter includes a first projection state in which the projection part projects infrared light and a second projection state in which the projection part projects visible light;

[0008] A power supply assembly, disposed on the main body and connected to the first light source and the second light source;

[0009] A touch sensor is disposed on the main body;

[0010] A control module is arranged on the main body and is respectively connected to the power supply assembly, the touch sensor, the first light source and the second light source. The control module is used to control the projection state of the light beam emitter to switch between the first projection state and the second projection state according to different states of the touch sensor.

[0011] Optionally, the touch sensor includes a response state and a non-response state. When the touch sensor is in the response state, the control module controls the light beam emitter to be in the first projection state. When the touch sensor is in the non-response state, the control module controls the light beam emitter to be in the second projection state.

[0012] Optionally, the first light source includes a first control switch, the second light source includes a second control switch, and both the first control switch and the second control switch are connected to the control module.

[0013] Optionally, the main body includes a receiving portion, the projection portion includes a first projection portion and a second projection portion, and the first projection portion and the second projection portion are both connected to the receiving portion;

[0014] The first light source is arranged in the accommodating portion, and the infrared light emitted by the first light source is projected through the first projection portion. The second light source is arranged in the accommodating portion, and the visible light emitted by the second light source is projected through the second projection portion. The touch sensor is arranged at the projection port of the first projection portion.

[0015] Optionally, the touch sensor includes a pressure sensor, and the pressure sensor is arranged around the projection port of the first projection part.

[0016] Optionally, the first projection portion and the second projection portion are respectively disposed at two ends of the accommodating portion, and a projection port of the first projection portion and a projection port of the second projection portion are disposed opposite to each other.

[0017] Optionally, the visible light and the infrared light projected by the light beam emitter both include at least two different polarization directions.

[0018] Optionally, the light beam emitter further comprises a third light source for emitting auxiliary light, and a beam-gathering structure arranged at a projection port of the projection portion, the infrared light emitted by the first light source and the visible light emitted by the second light source are both parallel to the auxiliary light, and a half-wave plate is arranged on the light-emitting side of the third light source;

[0019] The infrared light emitted by the first light source and the auxiliary light emitted by the third light source are projected in a linearly polarized light state through the beam-forming structure; and / or

[0020] The visible light emitted by the second light source and the auxiliary light emitted by the third light source are projected in a linearly polarized light state through the beam-forming structure.

[0021] Optionally, the light beam emitter further comprises a quarter wave plate disposed at a projection port of the projection portion, and the infrared light emitted by the first light source and / or the visible light emitted by the second light source are projected in a circularly polarized light state through the quarter wave plate.

[0022] The present application also provides an optical touch display system, comprising:

[0023] Light beam transmitter, comprising:

[0024] A main body, wherein a projection portion is provided on the main body;

[0025] A first light source disposed on the main body for emitting infrared light, and a second light source disposed on the main body for emitting visible light, wherein the projection state of the light beam emitter includes a first projection state in which the projection part projects infrared light and a second projection state in which the projection part projects visible light;

[0026] A power supply assembly, disposed on the main body and connected to the first light source and the second light source;

[0027] A touch sensor is disposed on the main body;

[0028] a control module, disposed on the main body, and connected to the power supply assembly, the touch sensor, the first light source, and the second light source, respectively, and configured to control the projection state of the light beam emitter to switch between the first projection state and the second projection state according to different states of the touch sensor;

[0029] The optical touch display panel comprises a display function unit, a photosensitive circuit and a control unit; the photosensitive circuit comprises a plurality of photosensitive units, the plurality of photosensitive units are arranged at intervals on the display function unit, and the display function unit and the photosensitive circuit are respectively connected to the control unit;

[0030] The photosensitive circuit is used to sense the light projected by the light beam emitter and send a sensing signal to the control unit, and the control unit is used to control the display function unit to display the position of the light projected by the light beam emitter according to the sensing signal.

[0031] Optionally, the light projected by the light beam emitter irradiates the optical touch display panel, and the light projected by the light beam emitter covers at least four of the photosensitive units.

[0032] The beneficial effects of the present invention include at least:

[0033] The present application sets a light beam emitter including a main body, a first light source and a second light source arranged on the main body, a power supply component connecting the first light source and the second light source, a touch sensor and a control module. The projection state of the light beam emitter includes a first projection state for projecting infrared light and a second projection state for projecting visible light. The control module is used to control the projection state of the light beam emitter to switch between the first projection state and the second projection state according to different states of the touch sensor. This setting method enables the light beam emitter to take into account both long-range interaction and short-range interaction usage modes, and can automatically switch the projection state according to actual usage needs, so as to provide a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a schematic structural diagram of a light beam transmitter provided in an embodiment of the present application;

[0036] Figure 2 is a connection diagram of a control module of a light beam transmitter provided in an embodiment of the present application;

[0037] Figure 3 is a schematic structural diagram of another light beam transmitter provided in an embodiment of the present application;

[0038] Figure 4 is a schematic structural diagram of another light beam transmitter provided in an embodiment of the present application;

[0039] Figure 5 is a schematic diagram of a light beam transmitter projecting linearly polarized light provided by an embodiment of the present application;

[0040] Figure 6 is a schematic diagram of a light beam transmitter projecting linearly polarized light provided by an embodiment of the present application;

[0041] Figure 7 This is a schematic diagram of a remote interaction mode of an optical touch display system provided in an embodiment of the present application;

[0042] Figure 8 This is a schematic diagram of remote interaction of an optical touch display system provided in an embodiment of the present application;

[0043] Fig. 9 It is a schematic diagram of a short-range interaction mode of an optical touch display system provided in an embodiment of the present application;

[0044] Fig.10 This is a schematic diagram of a short-range interaction of an optical touch display system provided in an embodiment of the present application;

[0045] Fig.11 This is a photosensitive circuit architecture diagram of an optical touch display panel provided in an embodiment of the present application;

[0046] Fig.12 It is a schematic diagram of an interaction mode of an optical touch display system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0048] The embodiments of the present application provide a beam emitter and an optical touch display system. The following are detailed descriptions. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments. In addition, in the description of the present application, the term "including" means "including but not limited to". The terms first, second, third, etc. are used only as labels and do not impose numerical requirements or establish an order. Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a rigid limitation on the scope of the present invention; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single values ​​within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the numbered range, such as 1, 2, 3, 4, 5 and 6, which are applicable regardless of the range. In addition, whenever a numerical range is indicated in this article, it is meant to include any quoted numbers (fractions or integers) within the indicated range.

[0049] The present application embodiment provides a light beam transmitter A1, see Figure 1-Figure 6 include:

[0050] A main body 10, wherein a projection portion 20 is disposed on the main body 10;

[0051] A first light source L1 for emitting infrared light is provided on the main body 10, and a second light source L2 for emitting visible light is provided on the main body 10, and the projection state of the light beam emitter A1 includes a first projection state in which the projection part 20 projects infrared light and a second projection state in which the projection part 20 projects visible light;

[0052] A power supply assembly 100 is disposed on the main body 10 and connected to the first light source L1 and the second light source L2;

[0053] A touch sensor 300 is disposed on the main body 10;

[0054] The control module 200 is disposed on the main body 10 and is respectively connected to the power supply assembly 100, the touch sensor 300, the first light source L1 and the second light source L2. The control module 200 is used to control the projection state of the light beam emitter A1 to switch between the first projection state and the second projection state according to different states of the touch sensor 300.

[0055] Specifically, the light beam transmitter A1 includes a main body 10, the main body 10 includes a shell and a receiving portion in the shell, the receiving portion is used to set the first light source L1, the second light source L2, the power supply assembly 100 and the control module 200, the touch sensor 300 can be set in the receiving portion, and can also be set on the projection part 20;

[0056] Specifically, the first light source L1 is used to emit infrared light, and the wavelength thereof may be one of 980nm, 808nm, and 850nm;

[0057] Specifically, the second light source L2 is used to emit visible light, and the visible light can be red light, orange light, yellow light, green light, blue light, cyan light, purple light or one of other color lights; the type and wavelength of visible light and the type and wavelength of invisible light can be designed according to the sensitive section of the photosensitive unit SD on the touch display panel A2 in actual conditions, and red light is preferably used.

[0058] Specifically, Figure 2 As shown, the control module 200 is connected to the power supply component 100, the touch sensor 300, the first light source L1 and the second light source L2. The power supply component 100 is used to supply power to the control module 200, the touch sensor 300, the first light source L1 and the second light source L2. The control module 200 controls the working status of the first light source L1 and the second light source L2, specifically adjusts the working status of the first light source L1 and the second light source L2 according to the status of the touch sensor 300.

[0059] Specifically, the touch sensor 300 includes a response state and a non-response state. The control module 200 adjusts the projection state of the beam emitter A1 according to the state of the touch sensor 300, that is, whether to project infrared light or visible light. Projecting infrared light is a near-end interaction mode, and projecting visible light is a long-range interaction mode.

[0060] Specifically, the touch sensor 300 may include a distance sensing sensor, wherein the touch sensor 300 may be disposed in the accommodating portion or in the projection portion 20. In a specific example, it may be an ultrasonic proximity switch, and by reasonably setting the sensing distance of the ultrasonic proximity switch, when the light beam transmitter A1 is close to the touch display panel A2, the ultrasonic proximity switch is in a response state, the control module 200 controls the first light source L1 to be in a state of emitting infrared light, and the second light source L2 is turned off, so as to achieve near-end interaction, and when the ultrasonic proximity switch is outside the sensing distance, the ultrasonic proximity switch is in a non-responsive state, the control module 200 controls the second light source L2 to be in a state of emitting visible light, and the first light source L1 is turned off, so as to achieve remote interaction.

[0061] Specifically, Figure 3 As shown, the touch sensor 300 may include a pressure sensor. In a specific embodiment, the touch sensor may be a telescopic pressure sensor, a capacitive pressure sensor, or a piezoelectric pressure sensor. Preferably, Figure 3 , the touch sensor 300 is arranged on the projection part 20. When the pressure sensor of the light beam transmitter A1 contacts the touch display panel A2 and a squeezing operation occurs, the pressure sensor is in a response state, the control module 200 controls the first light source L1 to be in a state of emitting infrared light, and the second light source L2 is turned off, so as to achieve near-end interaction, and when the pressure sensor is far away from the touch display panel A2 and is in a suspended state, the pressure sensor is in a non-response state, the control module 200 controls the second light source L2 to be in a state of emitting visible light, and the first light source L1 is turned off, so as to achieve remote interaction.

[0062] It can be understood that in this embodiment, the light beam emitter A1 includes a main body 10, a first light source L1 and a second light source L2 arranged on the main body 10, a power supply component 100 connecting the first light source L1 and the second light source L2, a touch sensor 300 and a control module 200. The projection state of the light beam emitter A1 includes a first projection state of projecting infrared light and a second projection state of projecting visible light. The control module 200 is used to control the projection state of the light beam emitter A1 to switch between the first projection state and the second projection state according to different states of the touch sensor 300. This setting method enables the light beam emitter A1 to take into account both remote interaction and short-range interaction usage modes, and can automatically switch the projection state according to actual usage needs, so as to provide a better user experience.

[0063] In one embodiment, the touch sensor 300 includes a response state and a non-response state. When the touch sensor 300 is in the response state, the control module 200 controls the light beam emitter A1 to be in the first projection state. When the touch sensor 300 is in the non-response state, the control module 200 controls the light beam emitter A1 to be in the second projection state.

[0064] Specifically, the response state and non-response state of the touch sensor 300 are determined according to the type of the specific touch sensor 300. For example, when the touch sensor 300 is a pressure sensor, the response state is that the pressure sensor is squeezed (when the pressure sensor is a capacitive sensor, the squeezing causes the capacitance of the sensor to change), and a current signal is generated, and this state is the response state; the non-response state is that the pressure sensor is not squeezed and no current signal is generated; when the touch sensor 300 is not a distance sensor, the distance sensor has a preset distance value. When approaching an obstacle, the sensor receives a returned ultrasonic wave, and then generates a current signal, and this state is the response state; the non-response state is that the distance between the distance sensor and the obstacle is greater than the preset distance value, and no returned ultrasonic wave is received, and no current signal is generated;

[0065] It should be noted that the difference between the short-range interaction and the long-range interaction of the optical touch display system is that the long-range interaction can be understood as remote marking, and the short-range interaction can be understood as a writing mode.

[0066] It can be understood that by adopting a reasonable touch sensor 300, the light beam emitter A1 can automatically switch the use state according to the actual needs of the user, thereby improving the user experience. Since the laser reflection entering the human eye can easily cause damage to the human eye, setting the near-end interaction to use infrared light can reduce the damage of the laser emitted by the light beam emitter A1 to the human eye.

[0067] In one embodiment, if Figure 2 As shown, the first light source L1 includes a first control switch C1 , and the second light source L2 includes a second control switch C2 . Both the first control switch C1 and the second control switch C2 are connected to the control module 200 .

[0068] Specifically, the first light source L1 includes a first control switch C1 and a first light-emitting body connected to the first control switch C1, and the first light-emitting body includes one of a tungsten lamp, a hydrogen lamp, and a tritium lamp.

[0069] Specifically, the second light source L2 includes a second control switch C2 and a second light emitter connected to the second control switch C2, and the second light emitter includes a deuterium lamp. Specifically, the first control switch C1 can be turned on or off manually, and can also be turned on or off by the control module 200.

[0070] Specifically, the second control switch C2 can be turned on or off by manual control, and can also be turned on or off by the control module 200. It is understandable that the turning on or off of the first light source L1 and the second light source L2 can be manually controlled according to the actual needs of the user, so that when the user only needs to use a single interaction mode, it can prevent the light source from being switched incorrectly due to misoperation, further improve the user experience, and can also save the power of the power supply assembly 100 and improve the energy-saving performance of the light beam sensor.

[0071] In one embodiment, if Figure 3 and Figure 4 As shown, the main body 10 includes a receiving portion, and the projection portion 20 includes a first projection portion 201 and a second projection portion 202, and the first projection portion 201 and the second projection portion 202 are both connected to the receiving portion;

[0072] The first light source L1 is disposed in the accommodating portion, and the infrared light emitted by the first light source L1 is projected through the first projection portion 201. The second light source L2 is disposed in the accommodating portion, and the visible light emitted by the second light source L2 is projected through the second projection portion 202. The touch sensor 300 is disposed at the projection port of the first projection portion 201.

[0073] Specifically, the first projection portion 201 and the second projection portion 202 may be disposed on the same side of the receiving portion, and the first projection portion 201 and the second projection portion 202 may be disposed on both the front and rear sides of the receiving portion;

[0074] In a specific example, the first projection part 201 and the second projection part 202 can be specifically annular structures, and the infrared light emitted by the first light source L1 passes through the hollow area of ​​the annular structure of the first projection part 201 and is projected, and the visible light emitted by the second light source L2 passes through the hollow area of ​​the annular structure of the second projection part 202 and is projected.

[0075] It should be noted that, since the first projection part 201 is used for proximal interaction, that is, used as a stylus, the touch sensor 300 can be set at the projection port of the first projection part 201 used for proximal interaction. The touch sensor 300 adopts a pressure sensor. Through the pressure generated by writing, the touch sensor 300 switches between a response state and a non-response state, and the control module 200 controls the light beam emitter A1 to switch between a proximal interaction mode and a remote interaction mode; under this setting, the first projection part 201 and the second projection part 202 can be set on the same side of the accommodating part; at the same time, the pressure sensor can also collect the writing force of the light beam emitter A1 during proximal interaction, and analyze and process the data through the optical touch display system and feed it back to the optical touch display panel A2, so as to display the depth information during writing, and then display the pen stroke during writing, which can further improve the user experience.

[0076] It should be noted that the first projection part 201 and the second projection part 202 can be located at the head and tail ends of the accommodating part. In order to avoid the light beam emitter A1 switching to different states, causing the visible light of remote interaction to stimulate the user's eyes, under this structure, the second control switch C2 of the second light source L2 used for remote interaction can be manually turned off. In this state, the state of the first light source L1 used for near-end interaction is switched between on and off, and the power supply of the first light source L1 emitting infrared light can be disconnected in time when not writing, thereby reducing the energy consumption of the light beam emitter A1.

[0077] It should be noted that the technical solution for displaying the touch depth on the touch display panel A2 through the sensing of the pressure sensor can be: the pressure sensor generates a pressure-sensitive electrical signal, the wireless signal transmitting module built into the light beam transmitter A1 transmits the pressure-sensitive electrical signal, the wireless signal receiving module built into the touch display panel A2 receives the pressure-sensitive electrical signal and transmits it to the control unit A22, the control unit A22 can include a central processing module and a digital signal processing module, the digital signal processing module converts the pressure-sensitive electrical signal into a pressure-sensitive digital signal, the pressure-sensitive digital signal is analyzed by the central processing module and displayed on the optical touch display panel A2, different touch depths are displayed at corresponding positions according to the strength of the received pressure-sensitive electrical signal, for example, in one example, the control unit A22 can be a system on chip (SOC), by setting the SOC in the optical touch display system, when near-end interaction is achieved, the writing depth information can be displayed on the optical touch display system.

[0078] It can be understood that by setting the touch sensor 300 at the projection port of the first projection part 201 for near-end interaction, the touch sensor 300 for switching between remote interaction and near-end interaction and the pressure sensor for writing display depth can be combined into one, that is, two functions can be achieved through one pressure sensor, which reduces production costs and makes the structure of the light beam emitter A1 more streamlined.

[0079] In one embodiment, if Figure 4 As shown, the touch sensor 300 includes a pressure sensor, and the pressure sensor is arranged around the projection port of the first projection part 201 .

[0080] Specifically, the pressure sensors are arranged around the projection port of the first projection part 201, so that pressure sensors are arranged around the infrared light passing through the first projection part 201, so that the user can adopt any pen holding method or tilt angle to sensitively detect the writing force, making the depth detection (i.e. the writing pen tip) display more accurate.

[0081] It can be understood that by arranging the pressure sensor around the projection port of the first projection part 201, the accuracy of the pressure sensor in detecting the writing force can be improved. Figure 3 The telescopic pressure sensor shown can avoid the need to use a program to correct the deviation between the actual writing position of the pen tip and the actual irradiation point of the infrared light, thereby improving the accuracy of the proximal interaction, i.e. the writing position, and improving the user experience.

[0082] In one embodiment, if Figure 3 and Figure 4 As shown, the first projection portion 201 and the second projection portion 202 are respectively disposed at two ends of the accommodation portion, and a projection port of the first projection portion 201 and a projection port of the second projection portion 202 are disposed opposite to each other.

[0083] It can be understood that the above-mentioned setting method makes the structure of the light beam emitter A1 more reasonable and the diameter thinner, which makes the user's hand feel better during proximal interaction (i.e. writing) without affecting the actual use, thereby improving the user experience.

[0084] In one embodiment, if Figure 5 and Figure 6 As shown, the visible light and the infrared light projected by the light beam emitter A1 both include at least two different polarization directions.

[0085] It should be noted that the outer layer of the touch display panel A2 is a polarizing film. When the integrated photosensitive unit SD is located inside the display panel, the laser (visible light and infrared light) emitted by the beam emitter A1 first falls on the polarizing film and then reaches the internal sensor after penetrating. When the polarization angle of the laser is orthogonal to the angle of the polarizing film, the laser cannot pass through the polarizing film, and the photosensitive unit SD cannot obtain the corresponding laser information, resulting in the problem of being unable to be recognized. In order to solve the above problem, the technical solution of this embodiment is provided.

[0086] It can be understood that by performing linear polarization processing on the light projected by the light beam emitter A1 so that the projected light (visible light and infrared light) has at least two different polarization directions, it can be ensured that when the projected light enters the touch display panel A2 from any angle, part of the light beam can pass through the polarizing film to reach the photosensitive unit SD on the touch display panel A2, thereby preventing only a few areas of the photosensitive devices on the touch display panel A2 from receiving light signals or even all photosensitive devices from not receiving light signals, thereby improving the positioning accuracy and sensitivity of the display panel.

[0087] In one embodiment, the light beam emitter A1 further includes a third light source L3 for emitting auxiliary light, and a beam-gathering structure 60 disposed at the projection port of the projection unit 20, the infrared light emitted by the first light source L1 and the visible light emitted by the second light source L2 are parallel to the auxiliary light, and a half-wave plate 50 is disposed on the light-emitting side of the third light source L3;

[0088] The infrared light emitted by the first light source L1 and the auxiliary light emitted by the third light source L3 are projected in a linearly polarized light state through the beam-forming structure 60; and / or

[0089] The visible light emitted by the second light source L2 and the auxiliary light emitted by the third light source L3 are projected through the beam-forming structure 60 in a linearly polarized light state.

[0090] Specifically, the auxiliary light emitted by the third light source L3 can be infrared light or visible light, which is adjusted according to actual needs.

[0091] Specifically, the beam-forming structure 60 can be a beam-forming lens, such as a convex lens. Two beams of light (auxiliary light and infrared light / visible light) are converged into a beam of light after passing through the beam-forming structure 60. Thus, under the premise that the diameter of the beam emitted by the beam emitter A1 remains unchanged, the intensity of the projection light emitted by the beam emitter A1 can be enhanced, so that the projection light has stronger penetrability, so that the photosensitive unit SD on the touch display panel A2 can sense the projection light.

[0092] It can be understood that by performing linear deflection processing on the light projected by the light beam emitter A1, the positioning accuracy and sensitivity of the display panel can be improved.

[0093] In one embodiment, the light beam emitter A1 further includes a quarter wave plate 70 disposed at the projection port of the projection portion 20 , and the infrared light emitted by the first light source L1 and / or the visible light emitted by the second light source L2 are projected in a circularly polarized light state through the quarter wave plate 70 .

[0094] Specifically, Figure 6 As shown, Figure 6 The structure is illustrated by taking the first light source L1 as an example. Of course, the light source can also be replaced by the second light source L2. The quarter wave plate 70 can be embedded in the hollow position of the annular first projection part 201 and the annular second projection part 202.

[0095] It can be understood that by performing linear deflection processing on the light projected by the light beam emitter A1, the positioning accuracy and sensitivity of the display panel can be improved.

[0096] The present application also provides an optical touch display system, such as Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, including:

[0097] Beam transmitter A1, such as Figure 1 As shown, including:

[0098] A main body 10, wherein a projection portion 20 is disposed on the main body 10;

[0099] A first light source L1 for emitting infrared light is provided on the main body 10, and a second light source L2 for emitting visible light is provided on the main body 10, and the projection state of the light beam emitter A1 includes a first projection state for projecting infrared light and a second projection state for projecting visible light;

[0100] A power supply assembly 100 is disposed on the main body 10 and connected to the first light source L1 and the second light source L2;

[0101] A touch sensor 300 is disposed on the main body 10;

[0102] The control module 200 is disposed on the main body 10 and is respectively connected to the power supply assembly 100, the touch sensor 300, the first light source L1 and the second light source L2. The control module 200 is used to control the projection state of the light beam emitter A1 to switch between the first projection state and the second projection state according to different states of the touch sensor 300;

[0103] like Figure 8 and Fig.10 As shown, Figure 8A schematic diagram of remote interaction. Fig.10 Schematic diagram of near-end interaction, the optical touch display panel A2 includes a display function unit A21, a photosensitive circuit and a control unit A22; the photosensitive circuit includes a plurality of photosensitive units SD, and the plurality of photosensitive units SD are arranged at intervals on the display function unit A21, and the display function unit A21 and the photosensitive circuit are connected to the control unit A22 respectively;

[0104] The photosensitive circuit is used to sense the light projected by the light beam emitter A1 and send a sensing signal to the control unit A22, and the control unit A22 is used to control the display function unit A21 to display the position of the light projected by the light beam emitter A1 according to the sensing signal.

[0105] Specifically, the structure and configuration of the light beam emitter A1 are the same as those in the above-mentioned embodiment, and will not be elaborated herein.

[0106] Specifically, the photosensitivity of the photosensitive circuit is realized by a plurality of photosensitive units SD arranged on the display function portion A21.

[0107] Specifically, the optical touch display panel A2 can be a display panel with a light sensing function, including a display function unit A21, a photosensitive circuit and a control unit A22, wherein the photosensitive circuit is mainly composed of a Sense TFT (photosensitive thin film transistor) and a Switch TFT (switching thin film transistor) and a subsequent readout circuit (Readout) and a control unit A22. When the source and drain of the SwitchTFT are turned on, the photocurrent generated by the Sensing TFT after light sensing can be read out and processed. The architecture diagram is as follows: Fig.11 shown.

[0108] Fig.11 In the embodiment, the photosensitive circuit includes a photosensitive thin film transistor, a switch thin film transistor and a first capacitor Cst (storage capacitor). The gate of the photosensitive thin film transistor is connected to the first control signal line SVGG, the source of the photosensitive thin film transistor is connected to the first power line SVDD, and the drain of the photosensitive thin film transistor is connected to the source of the switch thin film transistor. The first capacitor Cst includes a first plate and a second plate, the first plate is connected to the drain of the photosensitive thin film transistor and the source of the switch thin film transistor, and the second plate is connected to the common voltage signal line Vcom.

[0109] The photosensitive circuit also includes a readout circuit, the drain of the switch thin film transistor is connected to the readout circuit, and the gate of the switch thin film transistor is connected to the second control signal line Gate.

[0110] The readout circuit includes an operational amplifier, a second capacitor Cint, and a switch. The operational amplifier includes an inverting input terminal, a non-inverting input terminal, and an output terminal (such as Fig.11 The “-” in the operational amplifier in the embodiment indicates the inverting input terminal, and the “+” indicates the non-inverting input terminal), the non-inverting input terminal is connected to the comparison voltage Vref, and the inverting input terminal is connected to the drain of the switch thin film transistor. The second capacitor Cint and the switch are both connected in parallel to the operational amplifier FD, one end of the second capacitor Cint and one end of the switch are both connected to the inverting input terminal of the operational amplifier, and the other end of the second capacitor Cint and the other end of the switch are both connected to the output terminal of the operational amplifier. The output terminal of the operational amplifier is also connected to the readout line Readout, and the readout line Readout is used to output the light sensing signal.

[0111] It can be understood that by setting the light beam emitter A1 in combination with the light touch display panel A2 to form a light touch display system, it is possible to take into account both remote interaction and short-range interaction usage modes, and can automatically switch the projection state according to actual usage needs, thereby providing a better user experience.

[0112] In one embodiment, if Fig.12 As shown, the light projected by the light beam emitter A1 irradiates the optical touch display panel A2, and the light projected by the light beam emitter A1 covers at least four of the photosensitive units SD.

[0113] Specifically, the light spot size of the light projected by the light beam emitter A1 onto the optical touch display panel A2 is larger than the size of the photosensitive unit SD, and at any time, the light projected by the light beam emitter A1 covers at least four of the photosensitive units SD.

[0114] It should be noted that, the light projected by the light beam emitter A1 is set to cover at least four of the photosensitive units SD. Through the four photosensitive units SD, the specific coordinates of the display panel corresponding to the light projected by the light beam emitter A1 can be accurately calculated, for example (X, Y). When the light projected by the light beam emitter A1 only covers two of the photosensitive units SD, only the position of a single direction of the display panel corresponding to the light projected by the light beam emitter A1 can be calculated.

[0115] It is understandable that the light beam projected by the light beam emitter A1 is set to cover at least four of the photosensitive units SD. Based on the different light intensities received by the photosensitive units SD at different positions, the center of gravity algorithm can be used to simulate the exact position of the projected light beam of the light beam projector.

[0116] In summary, the present application sets a light beam emitter A1 including a main body 10, a first light source L1 and a second light source L2 arranged on the main body 10, a power supply component 100 connecting the first light source L1 and the second light source L2, a touch sensor 300 and a control module 200. The projection state of the light beam emitter A1 includes a first projection state of projecting infrared light and a second projection state of projecting visible light. The control module 200 is used to control the projection state of the light beam emitter A1 to switch between the first projection state and the second projection state according to different states of the touch sensor 300. This setting method enables the light beam emitter A1 to take into account both remote interaction and short-range interaction usage modes, and can automatically switch the projection state according to actual usage needs, so as to provide a better user experience.

[0117] The above is a detailed introduction to a light beam emitter and an optical touch display system provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A light beam transmitter, characterized in that: include: A main body, wherein a projection portion is provided on the main body; A first light source disposed on the main body for emitting infrared light, and a second light source disposed on the main body for emitting visible light, wherein the projection state of the light beam emitter includes a first projection state in which the projection part projects infrared light and a second projection state in which the projection part projects visible light; A power supply assembly, disposed on the main body and connected to the first light source and the second light source; A touch sensor is disposed on the main body; a control module, disposed on the main body, and connected to the power supply assembly, the touch sensor, the first light source, and the second light source, respectively, and configured to control the light beam emitter to switch between the first projection state and the second projection state according to a state of the touch sensor; Among them, when the light beam emitter is close to the touch display panel, the touch sensor is in a responding state, the control module controls the first light source to be in a state of emitting infrared light, and the second light source is turned off, so as to realize near-end interaction; when the light beam emitter is far away from the touch display panel, the touch sensor is in a non-responding state, the control module controls the second light source to be in a state of emitting visible light, and the first light source is turned off, so as to realize remote interaction.

2. The light beam transmitter according to claim 1, characterized in that When the touch sensor is in a response state, the control module controls the light beam emitter to be in the first projection state, and when the touch sensor is in a non-response state, the control module controls the light beam emitter to be in the second projection state.

3. The light beam transmitter according to claim 2, characterized in that The first light source includes a first control switch, the second light source includes a second control switch, and both the first control switch and the second control switch are connected to the control module.

4. The light beam transmitter according to claim 3, characterized in that The main body includes a receiving portion, the projection portion includes a first projection portion and a second projection portion, and the first projection portion and the second projection portion are both connected to the receiving portion; The first light source is arranged in the accommodating portion, and the infrared light emitted by the first light source is projected through the first projection portion. The second light source is arranged in the accommodating portion, and the visible light emitted by the second light source is projected through the second projection portion. The touch sensor is arranged at the projection port of the first projection portion.

5. The light beam transmitter according to claim 4, characterized in that The touch sensor includes a pressure sensor, and the pressure sensor is disposed around the projection port of the first projection portion.

6. The light beam transmitter according to claim 4, characterized in that The first projection portion and the second projection portion are respectively disposed at two ends of the accommodation portion, and a projection port of the first projection portion and a projection port of the second projection portion are disposed opposite to each other.

7. The light beam transmitter according to claim 1, characterized in that The visible light and the infrared light projected by the light beam emitter both include at least two different polarization directions.

8. The light beam transmitter according to claim 7, characterized in that The light beam emitter further comprises a third light source for emitting auxiliary light, and a beam-gathering structure arranged at the projection port of the projection portion, the infrared light emitted by the first light source and the visible light emitted by the second light source are both parallel to the auxiliary light, and a half-wave plate is arranged on the light-emitting side of the third light source; The infrared light emitted by the first light source and the auxiliary light emitted by the third light source are projected in a linearly polarized light state through the beam-forming structure; and / or The visible light emitted by the second light source and the auxiliary light emitted by the third light source are projected in a linearly polarized light state through the beam-forming structure.

9. The light beam transmitter according to claim 7, characterized in that: The light beam emitter further comprises a quarter wave plate arranged at the projection port of the projection portion, and the infrared light emitted by the first light source and / or the visible light emitted by the second light source are projected in a circularly polarized light state through the quarter wave plate.

10. An optical touch display system, characterized in that: include: Light beam transmitter, comprising: A main body, wherein a projection portion is provided on the main body; A first light source disposed on the main body for emitting infrared light, and a second light source disposed on the main body for emitting visible light, wherein the projection state of the light beam emitter includes a first projection state in which the projection part projects infrared light and a second projection state in which the projection part projects visible light; A power supply assembly, disposed on the main body and connected to the first light source and the second light source; A touch sensor is disposed on the main body; a control module, disposed on the main body, and connected to the power supply assembly, the touch sensor, the first light source, and the second light source, respectively, and configured to control the projection state of the light beam emitter to switch between the first projection state and the second projection state according to different states of the touch sensor; The optical touch display panel comprises a display function unit, a photosensitive circuit and a control unit; the photosensitive circuit comprises a plurality of photosensitive units, the plurality of photosensitive units are arranged at intervals on the display function unit, and the display function unit and the photosensitive circuit are respectively connected to the control unit; Among them, the photosensitive circuit is used to sense the light projected by the light beam emitter and send a sensing signal to the control unit, and the control unit is used to control the display function unit to display the position of the light projected by the light beam emitter according to the sensing signal; when the light beam emitter is close to the touch display panel, the touch sensor is in a responding state, the control module controls the first light source to be in a state of emitting infrared light, and the second light source is turned off to achieve near-end interaction; when the light beam emitter is away from the touch display panel, the touch sensor is in a non-responsive state, the control module controls the second light source to be in a state of emitting visible light, and the first light source is turned off to achieve remote interaction.

11. The optical touch display system according to claim 10, wherein: The light beam projected by the light beam emitter is irradiated onto the optical touch display panel, and the light beam projected by the light beam emitter covers at least four of the photosensitive units.

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