High-precision infrared touch liquid crystal display device

Abstract

The utility model discloses high-precision infrared touch liquid crystal display equipment which comprises a display screen, a connecting arm is fixedly connected to the back face of the display screen, a connecting base is connected to the end, away from the display screen, of the connecting arm, the display screen comprises a front frame, a middle frame and a back frame, and the front frame and the back frame are installed at the two ends of the middle frame respectively. AR (Augmented Reality) coated glass, an infrared touch panel, a light guide plate, a polarizing plate, an optical filter, a liquid crystal panel, a backlight plate, a main control panel and a power supply module are arranged between the front frame and the back frame. Each light beam intersection point is a touch sensing point, high-precision infrared touch control is achieved, the touch control precision is improved by increasing the number of the transmitting infrared tubes and the number of the receiving infrared tubes, the circuit structure of the power module is simple, cost is low, maintenance is convenient, and safety and reliability of the circuit are high.

Description

Technical Field

[0001] The utility model relates to the technical field of display equipment, in particular to a high-precision infrared touch liquid crystal display device. Background Art

[0002] Infrared touch LCD display device is a display that integrates infrared touch and LCD display functions. The touch display allows users to operate the host by simply touching the icons or text on the computer screen with their fingers, thus getting rid of keyboard and mouse operation and making human-computer interaction more straightforward. It is mainly used for information query in public halls, electronic games, song ordering, multimedia teaching, air ticket / train ticket pre-sale, etc. The infrared touch screen contains a complete integrated control circuit, and a set of high-precision, anti-interference infrared transmitting tubes and a set of infrared receiving tubes, which are cross-mounted in two opposite directions on a highly integrated circuit board to form an invisible infrared grating. The intelligent control system embedded in the control circuit continuously pulses the diode to form an infrared polarized beam grid. When a touching object such as a finger enters the grating, the beam is blocked. The intelligent control system will detect the change in light loss and transmit a signal to the control system to confirm the X-axis and Y-axis coordinate values.

[0003] At present, the touch screen with a metal frame with an infrared circuit board installed in front of the display is widely used on the display. The power supply part of the traditional infrared touch display uses many components, the circuit structure is complex, the hardware cost is high, and it is inconvenient to maintain. In addition, since the surface of the traditional infrared touch display is ordinary display glass, the touch sensing accuracy of the touch display is poor. Utility Model Content

[0004] The purpose of the utility model is to provide a high-precision infrared touch liquid crystal display device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision infrared touch liquid crystal display device, comprising a display screen, a connecting arm is fixedly connected to the back of the display screen, a connecting seat is connected to the end of the connecting arm away from the display screen, a bottom plate is fixedly connected to the bottom of the connecting seat, the display screen comprises a front frame, a middle frame and a back frame, the front frame and the back frame are respectively installed at both ends of the middle frame, AR coated glass, infrared touch panel, light guide plate, polarizing plate, filter, liquid crystal panel, backlight panel, main control board and power module are arranged between the front frame and the back frame, and one side of the middle frame is fixedly installed It is equipped with multiple buttons and infrared receivers, one side and one end of the front side of the infrared touch panel are fixedly provided with a plurality of transmitting infrared tubes, the other side and the other end of the front side of the infrared touch panel are fixedly provided with a plurality of receiving infrared tubes, and the plurality of transmitting infrared tubes correspond to the plurality of receiving infrared tubes one by one, the infrared touch panel, the liquid crystal panel and the power module are all connected with FPCB, the end of the FPCB away from the infrared touch panel and the liquid crystal panel is connected with a connector, the two connectors are connected with interfaces provided on the main control board, and the power module is connected with the main control board through the FPCB.

[0006] Preferably, several of the transmitting infrared tubes and several of the receiving infrared tubes are electrically connected to the main control board, the liquid crystal panel, multiple buttons and infrared receivers are electrically connected to the main control board, and the main control board is electrically connected to the external power supply through a power module.

[0007] Preferably, the back side of the AR-coated glass is connected to the infrared touch panel, the back side of the infrared touch panel is connected to the light guide plate, the back side of the light guide plate is connected to the polarizing plate, the back side of the polarizing plate is connected to the filter, the back side of the filter is connected to the liquid crystal panel, the back side of the liquid crystal panel is connected to the backlight panel, the back side of the backlight panel is connected to the main control board, and the back side of the main control board is connected to the power module.

[0008] Preferably, the AR coated glass, infrared touch panel, light guide plate, polarizing plate, filter, liquid crystal panel, backlight panel, main control board and power module are all located inside the middle frame, the AR coated glass is connected to the front frame, and the power module is installed on the back frame.

[0009] Preferably, the middle frame and the back frame are both made of aluminum alloy, and a heat dissipation window is provided on the top of the back side of the back frame.

[0010] Preferably, the four corners of the bottom of the base plate are fixedly connected with supporting feet, and the bottoms of the four supporting feet are fixedly connected with rubber pads.

[0011] Preferably, the power module includes a transformer, a rectifier bridge, a first capacitor, a first diode, a first resistor, a first MOS tube, a first transistor, a second resistor, a three-terminal adjustable shunt reference source, a second capacitor, a third resistor, a third capacitor and a voltage output end, one end of the primary coil of the transformer is connected to one end of the 220V AC power, the other end of the primary coil of the transformer is connected to the other end of the 220V AC power, one end of the secondary coil of the transformer is connected to an input end of the rectifier bridge, the other end of the secondary coil of the transformer is connected to the other input end of the rectifier bridge, an output end of the rectifier bridge is respectively connected to one end of the first capacitor and the anode of the first diode, the cathode of the first diode is respectively connected to one end of the first resistor and the drain of the first MOS tube, and the gate of the first MOS tube is respectively connected to the The other end of a resistor, the collector of a first triode and the cathode of a three-terminal adjustable shunt reference source are connected, the source of the first MOS tube is respectively connected to the base of the first triode and one end of the second resistor, the emitter of the first triode is respectively connected to the other end of the second resistor, one end of a third capacitor and one end of a voltage output end, the control end of the three-terminal adjustable shunt reference source is respectively connected to one end of the second capacitor and one end of the third resistor, the other output end of the rectifier bridge is respectively connected to the other end of the first capacitor, the anode of the three-terminal adjustable shunt reference source, the other end of the second capacitor, the other end of the third resistor, the other end of the third capacitor and the other end of the voltage output end, the model of the first diode is L-1822, the circuit structure of the power supply module is relatively simple, the cost is low, the maintenance is convenient, and the circuit safety and reliability are high.

[0012] Compared with the prior art, the utility model has the following beneficial effects: AR coated glass, infrared touch panel, light guide plate, polarizing plate, filter, liquid crystal panel, backlight panel, main control panel and power module are arranged in the display screen; the infrared touch panel and the liquid crystal panel realize infrared touch liquid crystal display; the infrared touch panel uses a plurality of transmitting infrared tubes and a plurality of receiving infrared tubes; the infrared rays emitted by the plurality of transmitting infrared tubes form a beam grid; each beam intersection is a touch sensing point, thereby realizing high-precision infrared touch control; the touch control accuracy is improved by increasing the number of transmitting infrared tubes and receiving infrared tubes; the circuit structure of the power module is relatively simple, the cost is low, the maintenance is convenient, and the circuit safety and reliability are high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the display screen of the utility model;

[0015] Figure 3 It is an expanded view of the utility model;

[0016] Figure 4 It is a partial diagram of the utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the infrared touch panel of the utility model;

[0018] Figure 6 This is a schematic diagram of the structure of the bottom plate of the utility model;

[0019] Figure 7 It is a module diagram of the utility model;

[0020] Figure 8 This is a circuit schematic diagram of the power module of the utility model.

[0021] In the figure: 1. display screen; 2. connecting arm; 3. connecting seat; 4. bottom plate; 5. supporting foot; 6. rubber pad; 7. middle frame; 8. front frame; 9. back frame; 10. infrared receiver; 11. button; 12. AR coated glass; 13. infrared touch pad; 14. light guide plate; 15. polarizing plate; 16. filter; 17. liquid crystal panel; 18. backlight plate; 19. main control board; 20. power module; 21. transmitting infrared tube; 22. receiving infrared tube; 23. interface; 24. connector; 25. FPCB. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] See also Figure 1-8The utility model provides a high-precision infrared touch liquid crystal display device, including a display screen 1, a connecting arm 2 is fixedly connected to the back of the display screen 1, a connecting arm 2 is connected to a connecting seat 3 at one end of the connecting arm 2 away from the display screen 1, and a bottom plate 4 is fixedly connected to the bottom of the connecting seat 3. The display screen 1 includes a front frame 8, a middle frame 7 and a back frame 9. The front frame 8 and the back frame 9 are respectively installed at both ends of the middle frame 7. AR coated glass 12, an infrared touch panel 13, a light guide plate 14, a polarizing plate 15, a filter 16, a liquid crystal panel 17, a backlight panel 18, a main control board 19 and a power module 20 are arranged between the front frame 8 and the back frame 9. A plurality of buttons 11 and an infrared touch panel 18 are fixedly installed on one side of the middle frame 7. The external receiver 10 and the infrared touch panel 13 are fixedly provided with a plurality of transmitting infrared tubes 21 on one side and one end of the front face, and the infrared touch panel 13 is fixedly provided with a plurality of receiving infrared tubes 22 on the other side and the other end of the front face, and the plurality of transmitting infrared tubes 21 correspond to the plurality of receiving infrared tubes 22 one by one, and the infrared touch panel 13, the liquid crystal panel 17 and the power module 20 are all connected with the FPCB25, and the ends of the FPCB25 away from the infrared touch panel 13 and the liquid crystal panel 17 are all connected with the connectors 24, and the two connectors 24 are connected with the interfaces 23 provided on the main control panel 19, and the power module 20 is connected with the main control panel 19 through the FPCB25;

[0024] When in use, the connecting arm 2 is connected to the connecting seat 3, and the bottom plate 4 supports and fixes the display screen 1 through the connecting arm 2 and the connecting seat 3. The outer shell of the display screen 1 is composed of a front frame 8, a middle frame 7 and a back frame 9. The infrared touch panel 13 is connected to a plurality of transmitting infrared tubes 21 and a plurality of receiving infrared tubes 22. The infrared rays emitted by the plurality of transmitting infrared tubes 21 form a beam grid, and each beam intersection is a touch sensing point, thereby realizing high-precision infrared touch. The touch accuracy is improved by increasing the number of transmitting infrared tubes 21 and receiving infrared tubes 22. The AR coated glass 12 protects the infrared touch panel 13, and the AR coated glass 12 is dust-proof and damage-proof. The liquid crystal panel 17 performs liquid crystal display. The polarizing plate 15, the filter 16 and the backlight panel 18 are used to improve the clarity of the liquid crystal panel 17.

[0025] A plurality of transmitting infrared tubes 21 and a plurality of receiving infrared tubes 22 are electrically connected to the main control board 19, the liquid crystal panel 17, a plurality of buttons 11 and the infrared receiver 10 are electrically connected to the main control board 19, and the main control board 19 is electrically connected to an external power supply through a power module 20.

[0026] The back side of the AR coated glass 12 is connected to the infrared touch panel 13, the back side of the infrared touch panel 13 is connected to the light guide plate 14, the back side of the light guide plate 14 is connected to the polarizing plate 15, the back side of the polarizing plate 15 is connected to the optical filter 16, the back side of the optical filter 16 is connected to the liquid crystal panel 17, the back side of the liquid crystal panel 17 is connected to the backlight panel 18, the back side of the backlight panel 18 is connected to the main control panel 19, the back side of the main control panel 19 is connected to the power module 20, and the connection relationship among the AR coated glass 12, the infrared touch panel 13, the light guide plate 14, the polarizing plate 15, the optical filter 16, the liquid crystal panel 17, the backlight panel 18, the main control panel 19 and the power module 20 is disclosed.

[0027] The AR coated glass 12, the infrared touch panel 13, the light guide plate 14, the polarizing plate 15, the optical filter 16, the liquid crystal panel 17, the backlight panel 18, the main control panel 19 and the power module 20 are all located inside the middle frame 7, the AR coated glass 12 is connected to the front frame 8, and the power module 20 is installed on the back frame 9. The AR coated glass 12, the infrared touch panel 13, the light guide plate 14, the polarizing plate 15, the optical filter 16, the liquid crystal panel 17, the backlight panel 18, the main control panel 19 and the power module 20 are located in a closed space formed by the front frame 8, the middle frame 7 and the back frame 9, so as to protect the AR coated glass 12, the infrared touch panel 13, the light guide plate 14, the polarizing plate 15, the optical filter 16, the liquid crystal panel 17, the backlight panel 18, the main control panel 19 and the power module 20.

[0028] The middle frame 7 and the back frame 9 are both made of aluminum alloy. A heat dissipation window is provided on the top of the back of the back frame 9, which has a good heat dissipation effect.

[0029] The four corners at the bottom of the bottom plate 4 are fixedly connected with supporting feet 5, and the bottoms of the four supporting feet 5 are fixedly connected with rubber pads 6. The bottom plate 4 is supported by the supporting feet 5, and the rubber pads 6 play an anti-slip role.

[0030] The power module 20 includes a transformer, a rectifier bridge, a first capacitor, a first diode, a first resistor, a first MOS tube, a first transistor, a second resistor, a three-terminal adjustable shunt reference source, a second capacitor, a third resistor, a third capacitor and a voltage output end. One end of the primary coil of the transformer is connected to one end of the 220V AC power, and the other end of the primary coil of the transformer is connected to the other end of the 220V AC power. One end of the secondary coil of the transformer is connected to an input end of the rectifier bridge, and the other end of the secondary coil of the transformer is connected to the other input end of the rectifier bridge. An output end of the rectifier bridge is respectively connected to one end of the first capacitor and the anode of the first diode, and the cathode of the first diode is respectively connected to one end of the first resistor and the drain of the first MOS tube, and the gate of the first MOS tube is respectively connected to the gate of the first resistor. The other end of the rectifier bridge is connected to the anode of the three-terminal adjustable shunt reference source, the other end of the second capacitor, the other end of the third resistor, the other end of the third capacitor, and the other end of the voltage output end. The model of the first diode is L-1822. The circuit structure of the power supply module 20 is relatively simple, the cost is low, the maintenance is convenient, and the circuit safety and reliability are high.

[0031] When the embodiment of the present application is in use: the connecting arm 2 is connected to the connecting seat 3, the bottom plate 4 supports and fixes the display screen 1 through the connecting arm 2 and the connecting seat 3, the outer shell of the display screen 1 is composed of a front frame 8, a middle frame 7 and a back frame 9, and the AR coated glass 12, the infrared touch panel 13, the light guide plate 14, the polarizing plate 15, the filter 16, the liquid crystal panel 17, the backlight panel 18, the main control board 19 and the power module 20 are located in a closed space formed by the front frame 8, the middle frame 7 and the back frame 9, and are used to protect the AR coated glass 12, the infrared touch panel 13, the light guide plate 14, the polarizing plate 15, the filter 16, the liquid crystal panel 17, the backlight panel 18, the main control board 19 and the power module 20. Board 18, main control board 19 and power module 20, the infrared touch panel 13 realizes infrared touch through a plurality of transmitting infrared tubes 21 and a plurality of receiving infrared tubes 22, and the touch accuracy is improved by increasing the number of transmitting infrared tubes 21 and receiving infrared tubes 22. The AR coated glass 12 protects the infrared touch panel 13, and the AR coated glass 12 is dust-proof and damage-proof. The liquid crystal panel 17 performs liquid crystal display. The polarizing plate 15, the filter 16 and the backlight panel 18 are used to improve the clarity of the liquid crystal panel 17. The circuit structure of the power module 20 is relatively simple, the cost is low, the maintenance is convenient, and the circuit safety and reliability are high.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision infrared touch liquid crystal display device, comprising a display screen (1), characterized in that: The back of the display screen (1) is fixedly connected to a connecting arm (2); one end of the connecting arm (2) away from the display screen (1) is connected to a connecting seat (3); the bottom of the connecting seat (3) is fixedly connected to a bottom plate (4); the display screen (1) comprises a front frame (8), a middle frame (7) and a back frame (9); the front frame (8) and the back frame (9) are respectively installed at two ends of the middle frame (7); an AR coated glass (12), an infrared touch panel (13), a light guide plate (14), a polarizing plate (15), a filter (16), a liquid crystal panel (17), a backlight panel (18), a main control panel (19) and a power module (20) are arranged between the front frame (8) and the back frame (9); a plurality of buttons (11) and an infrared receiver (10) are fixedly installed on one side of the middle frame (7); A plurality of transmitting infrared tubes (21) are fixedly arranged on one side and one end of the front face of the infrared touch panel (13), and a plurality of receiving infrared tubes (22) are fixedly arranged on the other side and the other end of the front face of the infrared touch panel (13), and the plurality of transmitting infrared tubes (21) correspond to the plurality of receiving infrared tubes (22) one by one. The infrared touch panel (13), the liquid crystal panel (17) and the power module (20) are all connected to an FPCB (25), and one end of the FPCB (25) away from the infrared touch panel (13) and the liquid crystal panel (17) is connected to a connector (24), and the two connectors (24) are connected to interfaces (23) arranged on a main control panel (19), and the power module (20) is connected to the main control panel (19) through the FPCB (25).

2. A high-precision infrared touch liquid crystal display device according to claim 1, characterized in that: The plurality of transmitting infrared tubes (21) and the plurality of receiving infrared tubes (22) are all electrically connected to a main control board (19); the liquid crystal panel (17), the plurality of buttons (11) and the infrared receiver (10) are all electrically connected to the main control board (19); and the main control board (19) is electrically connected to an external power supply via a power module (20).

3. A high-precision infrared touch liquid crystal display device according to claim 1, characterized in that: The back side of the AR coated glass (12) is connected to the infrared touch panel (13), the back side of the infrared touch panel (13) is connected to the light guide plate (14), the back side of the light guide plate (14) is connected to the polarizing plate (15), the back side of the polarizing plate (15) is connected to the filter (16), the back side of the filter (16) is connected to the liquid crystal panel (17), the back side of the liquid crystal panel (17) is connected to the backlight panel (18), the back side of the backlight panel (18) is connected to the main control panel (19), and the back side of the main control panel (19) is connected to the power module (20).

4. The high-precision infrared touch liquid crystal display device according to claim 1, characterized in that: The AR coated glass (12), the infrared touch panel (13), the light guide plate (14), the polarizing plate (15), the filter (16), the liquid crystal panel (17), the backlight panel (18), the main control panel (19) and the power module (20) are all located inside the middle frame (7); the AR coated glass (12) is connected to the front frame (8); and the power module (20) is installed on the back frame (9).

5. The high-precision infrared touch liquid crystal display device according to claim 1, characterized in that: The middle frame (7) and the back frame (9) are both made of aluminum alloy, and a heat dissipation window is provided on the top of the back side of the back frame (9).

6. The high-precision infrared touch liquid crystal display device according to claim 1, characterized in that: The four corners at the bottom of the base plate (4) are all fixedly connected with supporting feet (5), and the bottoms of the four supporting feet (5) are all fixedly connected with rubber pads (6).

7. The high-precision infrared touch liquid crystal display device according to claim 1, characterized in that: The power module (20) comprises a transformer, a rectifier bridge, a first capacitor, a first diode, a first resistor, a first MOS tube, a first transistor, a second resistor, a three-terminal adjustable shunt reference source, a second capacitor, a third resistor, a third capacitor and a voltage output end, one end of the primary coil of the transformer is connected to one end of the 220V alternating current, the other end of the primary coil of the transformer is connected to the other end of the 220V alternating current, one end of the secondary coil of the transformer is connected to an input end of the rectifier bridge, the other end of the secondary coil of the transformer is connected to the other input end of the rectifier bridge, an output end of the rectifier bridge is respectively connected to one end of the first capacitor and the anode of the first diode, the cathode of the first diode is respectively connected to one end of the first resistor and the drain of the first MOS tube. The gate of the first MOS tube is respectively connected to the other end of the first resistor, the collector of the first triode and the cathode of the three-terminal adjustable shunt reference source, the source of the first MOS tube is respectively connected to the base of the first triode and one end of the second resistor, the emitter of the first triode is respectively connected to the other end of the second resistor, one end of the third capacitor and one end of the voltage output end, the control end of the three-terminal adjustable shunt reference source is respectively connected to one end of the second capacitor and one end of the third resistor, the other output end of the rectifier bridge is respectively connected to the other end of the first capacitor, the anode of the three-terminal adjustable shunt reference source, the other end of the second capacitor, the other end of the third resistor, the other end of the third capacitor and the other end of the voltage output end, and the model of the first diode is L-1822.

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