LED display screen supporting touch control

Abstract

The utility model belongs to the field of LED display screens, and provides an LED display screen supporting touch control. The touch screen comprises a PCB (printed circuit board) substrate, a control unit is mounted on the back of the PCB substrate, a plurality of touch control areas are arranged on the PCB substrate, data transmitters which are in data connection with the control unit are arranged on the back of the PCB substrate and correspond to the touch control areas, each touch control area comprises a plurality of LED modules which are regularly mounted on the PCB substrate, and the touch control areas are in data connection with the control unit. Each LED module comprises a lamp panel and an LED driving circuit which are connected with the PCB substrate, the LED driving circuits are electrically connected with the control unit, a plurality of LED lamp beads which are arranged in rows and columns are mounted on the lamp panel, and a touch sensing chip is mounted at the bottom end of one LED lamp bead in the center of the lamp panel. According to the touch LED display screen, the touch sensing chip is used and integrated in the LED lamp beads, one LED lamp bead integrated with the touch sensing chip is used in each LED module, and the touch sensing chip supports serial data transmission.

Description

Technical Field

[0001] The utility model belongs to the field of LED displays, and specifically relates to an LED display supporting touch control. Background Art

[0002] An LED display is a device that integrates computer technology and information processing and is used to display information such as text, images, and videos. It has been widely used in commercial media, teaching, household use, performances, and other fields. With the continuous development of technology, LED displays have gradually developed towards touch control. The structure of an LED display is closely related to its touch control effect. The installation of traditional touch displays is unreasonable, making it difficult to manufacture and install LED displays. The touch control device cannot be applied to large-size LED displays, resulting in low touch sensitivity of the LED display and inability to achieve precise control, seriously affecting the user experience.

[0003] In the prior art, a patent document with the publication number CN111192532A discloses a touch-controlled LED display, including a frame and a plurality of LED modules. The frame surrounds the outside of the LED modules. A touch control device is accommodated in the frame and electrically connected to the LED modules. The touch control device includes a first touch element and a second touch element. A transmitting unit is provided on the first touch element, and a receiving unit is provided on the second touch element. In the above LED display, since the touch control device is around the LED modules, when a corresponding operation is performed on the LED modules, the signal received by the receiving unit changes, and thus the corresponding operation position of the LED modules can be determined to achieve touch control of the LED modules. Those skilled in the art have proposed an LED display supporting touch control to solve the problems raised in the background art. However, on the one hand, the above display has a limited improvement in the touch response speed of the LED display, and on the other hand, the improvement in the thinness and lightness of the LED display module is limited. Moreover, the existing display is not convenient for chip-level integration of the LED display touch module, and thus cannot effectively improve the reliability and integration of the LED display. Based on this, the utility model provides an LED display supporting touch control to solve the technical problems raised in the above background art. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides an LED display supporting touch control to solve the problems that on the one hand, the existing display has a limited improvement in the touch response speed of the LED display, on the other hand, the improvement in the thinness and lightness of the LED display module is limited, and the existing display is not convenient for chip-level integration of the LED display touch module, and thus cannot effectively improve the reliability and integration of the LED display.

[0005] A touch-supported LED display screen, including a PCB substrate, a control unit is mounted on the back of the PCB substrate, and the control unit is used for controlling the display screen. A plurality of touch control areas are provided on the PCB substrate;

[0006] On the back of the PCB substrate and corresponding to each touch control area, a data transmitter connected to the control unit for data connection is provided. Each touch control area includes a plurality of LED modules regularly mounted on the PCB substrate;

[0007] The LED modules respectively include a lamp board connected to the PCB substrate and an LED driving circuit, and the LED driving circuit is electrically connected to the control unit;

[0008] A plurality of LED lamp beads arranged in a row and column form are mounted on the lamp board. A touch sensing chip is mounted at the bottom end of one of the LED lamp beads at the center of the lamp board. The touch sensing chip is mounted on the PCB substrate through an insulating colloid. The data output end of the touch sensing chip is electrically connected to the data transmitter through a signal amplification circuit.

[0009] Preferably, the touch control area is a square area, the specification of the square area is 60mm×60mm, the lamp board is a square board, and the specification of the lamp board is 6mm×6mm.

[0010] Preferably, the LED driving circuit includes a set of column constant current driving chip circuits and a set of row driving chip circuits. The column constant current driving chip circuits are electrically connected to the anodes and cathodes of the LED lamp beads in the same column, and the row driving chip circuits are electrically connected to the anodes and cathodes of the LED lamp beads in the same row.

[0011] Preferably, the control unit includes a collection module for collecting the position information of the touch sensing chips, and the collection module collects the X-axis coordinates and Y-axis coordinates of each touch sensing chip.

[0012] Preferably, the control unit is respectively connected to the control ends of each row driving chip circuit and each column constant current driving chip circuit, and the control unit is used for controlling the output current of each row driving chip circuit and each column constant current driving chip circuit.

[0013] Preferably, a constant current driving circuit is provided at the connection between the LED driving circuit and the control unit, and the constant current driving circuit keeps the current input to the row driving chip circuit and the column constant current driving chip circuit constant.

[0014] Preferably, the LED lamp beads respectively include a blue wafer, a green wafer and a red wafer.

[0015] Preferably, the touch sensing chip is provided with a touch signal input circuit, which is used to sense an external touch action and generate a capacitance change signal to be sent to the touch sensing chip.

[0016] Preferably, the control unit determines whether there is a touch on the LED module according to the capacitance change signal of the touch sensing chip. After the control unit determines that there is a touch on the LED module, it controls the input signals of all the LED modules in the touch control area where the LED module is located.

[0017] Compared with the prior art, the present utility model has the following beneficial effects:

[0018] In this touch-controlled LED display screen, a touch sensing chip is used. The touch sensing chip is integrated inside the LED lamp bead. One LED lamp bead integrated with a touch sensing chip is used in each LED module. The touch sensing chip supports serial data transmission. Each group of data can control an area of *mm. The LED display screen is divided into areas of *mm. Through data control, area control is achieved, and finally touch control of the display screen is realized. The above design, on the one hand, improves the touch response speed of this LED display screen, on the other hand, improves the thinness and lightness of the module, and this LED display screen realizes chip-level integration of the touch module, improving the reliability and high integration degree of the overall solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the display screen designed for an LED display screen supporting touch control according to the present utility model;

[0020] Figure 2 For the present utility model Figure 1 A schematic structural diagram from another perspective;

[0021] Figure 3 It is an exploded structural diagram of the touch sensing chip and the lamp board of the present utility model;

[0022] Figure 4 It is a schematic structural diagram of the column constant current drive chip circuit of the present utility model;

[0023] Figure 5 It is a schematic structural diagram of the signal amplification circuit of the present utility model;

[0024] Figure 6 It is a schematic structural diagram of the row drive chip circuit of the present utility model;

[0025] Figure 7 It is a schematic structural diagram of the touch signal input circuit of the present utility model;

[0026] Figure 8 It is a schematic structural diagram of the LED drive circuit of the present utility model.

[0027] In the figure:

[0028] 1. PCB substrate; 2. Control unit; 3. Touch control area; 4. Data transmitter; 5. Touch sensing chip; 6. Lamp board; 7. LED lamp beads. Specific embodiments

[0029] The following further describes in detail the embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0030] As shown in the attached Figure 1 to the attached Figure 8 shown: A touch-supported LED display screen includes a PCB substrate 1, a control unit 2 is mounted on the back of the PCB substrate 1, and a plurality of touch control areas 3 are provided on the PCB substrate 1. The touch control area 3 is a square area, and the specification of the square area is 60 mm × 60 mm;

[0031] The specification of the touch control area 3 can also be customized according to actual needs;

[0032] On the back of the PCB substrate 1 and corresponding to the position of each touch control area 3, a data transmitter 4 data-connected to the control unit 2 is provided. Each touch control area 3 includes a plurality of LED modules regularly mounted on the PCB substrate 1;

[0033] The LED modules respectively include a lamp board 6 connected to the PCB substrate 1 and an LED driving circuit, and the LED driving circuit is electrically connected to the control unit 2;

[0034] The lamp board 6 is a square board, and the specification of the lamp board 6 is 6 mm × 6 mm;

[0035] A plurality of LED lamp beads 7 arranged in rows and columns are mounted on the lamp board 6. The LED lamp beads 7 respectively include a blue chip, a green chip and a red chip;

[0036] At the bottom of an LED lamp bead 7 at the center of the lamp board 6, a touch sensing chip 5 is mounted. The touch sensing chip 5 is mounted on the PCB substrate 1 through an insulating colloid. The touch sensing chip 5 is provided with a touch signal input circuit, and the touch signal input circuit is used to sense an external touch action and generate a capacitance change signal and send it to the touch sensing chip 5;

[0037] The data output end of the touch sensing chip 5 is electrically connected to the data transmitter 4 through a signal amplification circuit.

[0038] The control unit 2 includes an acquisition module for acquiring the position information of the touch sensing chip 5. The acquisition module acquires the X-axis coordinates and Y-axis coordinates of each touch sensing chip 5;

[0039] The LED driving circuit includes a set of column constant-current driving chip circuits and a set of row driving chip circuits. The column constant-current driving chip circuits are electrically connected to the anodes and cathodes of the LED beads 7 in the same column, and the row driving chip circuits are electrically connected to the anodes and cathodes of the LED beads 7 in the same row.

[0040] The control unit 2 is respectively connected to the control ends of each row driving chip circuit and each column constant-current driving chip circuit. The control unit 2 is used to control the output currents of each row driving chip circuit and each column constant-current driving chip circuit.

[0041] A constant-current driving circuit is provided at the connection between the LED driving circuit and the control unit 2, and the constant-current driving circuit keeps the currents input to the row driving chip circuit and the column constant-current driving chip circuit constant.

[0042] The control unit 2 determines whether there is a touch on the LED module according to the capacitance change signal of the touch sensing chip 5. After the control unit 2 determines that there is a touch on the LED module, it controls the input signals of all the LED modules in the touch control area 3 where the LED module is located.

[0043] In this touch LED display screen, the touch sensing chip 5 is used. The touch sensing chip 5 is integrated inside the LED bead 7. One LED bead 7 integrated with the touch sensing chip 5 is used in each LED module. The touch sensing chip 5 supports serial data transmission. Each set of data can control an area of 60*60 mm. The LED display screen is divided into areas of 60*60 mm. Through data control, area control is achieved, and finally touch control of the display screen is realized. The above design, on the one hand, improves the touch response speed of this LED display screen, on the other hand, improves the thinness and lightness of the module, and this LED display screen realizes chip-level integration of the touch module, improving the reliability and high integration degree of the overall solution.

[0044] The embodiments of the present invention are given for the purposes of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A touch-enabled LED display, characterized in that: It comprises a PCB substrate (1), a control unit (2) is mounted on the back of the PCB substrate (1), and a plurality of touch control areas (3) are arranged on the PCB substrate (1); A data transmitter (4) connected to the control unit (2) is provided on the back of the PCB substrate (1) and at a position corresponding to each touch control area (3), and each touch control area (3) includes a plurality of LED modules regularly mounted on the PCB substrate (1); The LED module comprises a light board (6) connected to the PCB substrate (1) and an LED driving circuit, and the LED driving circuit is electrically connected to the control unit (2); The light board (6) is provided with a plurality of LED lamp beads (7) arranged in rows and columns, a touch sensing chip (5) is installed at the bottom end of one of the LED lamp beads (7) at the center of the light board (6), the touch sensing chip (5) is installed on the PCB substrate (1) via an insulating colloid, and a data output end of the touch sensing chip (5) is electrically connected to the data transmitter (4) via a signal amplification circuit.

2. A touch-enabled LED display screen as claimed in claim 1, characterized in that: The touch control area (3) is a square area, the size of which is 60 mm×60 mm; the light board (6) is a square board, the size of which is 6 mm×6 mm.

3. A touch-enabled LED display screen as claimed in claim 1, characterized in that: The LED driving circuit comprises a group of column constant current driving chip circuits and a group of row driving chip circuits, wherein the column constant current driving chip circuits are electrically connected to the anode end and the cathode end of the LED lamp beads (7) in the same column, and the row driving chip circuits are electrically connected to the anode end and the cathode end of the LED lamp beads (7) in the same row.

4. A touch-enabled LED display screen as claimed in claim 1, characterized in that: The control unit (2) comprises a collection module for collecting position information of the touch sensing chip (5), wherein the collection module collects the X-axis coordinate and the Y-axis coordinate of each touch sensing chip (5).

5. A touch-enabled LED display screen as claimed in claim 3, characterized in that: The control unit (2) is respectively connected to the control end of each row drive chip circuit and the control end of each column constant current drive chip circuit, and the control unit (2) is used to control the output current of each row drive chip circuit and each column constant current drive chip circuit.

6. A touch-enabled LED display screen as claimed in claim 5, characterized in that: A constant current drive circuit is provided at the connection point between the LED drive circuit and the control unit (2), and the constant current drive circuit keeps the current input to the row drive chip circuit and the column constant current drive chip circuit constant.

7. A touch-enabled LED display screen as claimed in claim 1, characterized in that: The LED lamp beads (7) respectively include a blue chip, a green chip and a red chip.

8. The touch-enabled LED display screen according to claim 1, characterized in that: The touch sensing chip (5) is provided with a touch signal input circuit, and the touch signal input circuit is used to sense an external touch action and generate a capacitance change signal to be sent to the touch sensing chip (5).

9. A touch-enabled LED display screen as claimed in claim 2, characterized in that: The control unit (2) determines whether the LED module is touched based on the capacitance change signal of the touch sensing chip (5). After the control unit (2) determines that the LED module is touched, it controls the input signals of all LED modules in the touch control area (3) where the LED module is located.

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