LED display screen supporting touch control

Abstract

The invention belongs to the field of LED display screens, and provides an LED display screen supporting touch control. The touch screen comprises a PCB substrate, a control unit is attached to the back face of the PCB substrate, a plurality of touch control areas are arranged on the PCB substrate, data transmitters in data connection with the control unit are arranged at the positions, corresponding to the touch control areas, of the back face of the PCB substrate, and each touch control area comprises a plurality of LED modules regularly attached to the PCB substrate. 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 invention belongs to the field of LED display screens, in particular to a touch-supporting LED display screen. Background Art

[0002] LED display is a device that integrates computer technology and information processing, and is used to display text, images, videos and other information. It has been widely used in commercial media, teaching, home use, performances and other fields. With the continuous development of science and technology, LED display has gradually developed towards touch-sensitive. The structure of LED display is closely related to its touch effect. The installation of traditional touch display is unreasonable, and the production and installation of LED display are difficult. Touch devices cannot be applied to large-size LED display, resulting in low touch sensitivity of LED display and inability to achieve precise control, which seriously affects the user experience.

[0003] In the prior art, the patent document with publication number CN111192532A discloses a touch-controlled LED display screen, comprising a frame and a plurality of LED modules, wherein the frame is arranged around the outside of the LED module, and a touch-controlled device is accommodated in the frame and electrically connected to the LED module. The touch-controlled device comprises a first touch-controlled element and a second touch-controlled element, wherein the first touch-controlled element is provided with a transmitting unit, and the second touch-controlled element is provided with a receiving unit. Since the touch-controlled device is arranged around the LED module, when a corresponding operation is performed on the LED module, the signal received by the receiving unit changes, thereby being able to judge the corresponding operation position of the LED module, and realizing touch control of the LED module. A person skilled in the art has proposed a touch-controlled LED display screen to solve the problems raised in the background technology. However, the touch-controlled display screen has limited improvement speed for the touch response of the LED display screen on the one hand, and limited improvement degree for the thinness of the LED display screen module on the other hand, and the existing display screen is not convenient for realizing chip-level integration of the touch module of the LED display screen, and thus cannot effectively improve the reliability and integration of the LED display screen. Based on this, the present invention provides a touch-controlled LED display screen to solve the technical problems raised in the background technology. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a touch-supported LED display screen to solve the problems that, on the one hand, the touch response improvement speed of the LED display screen is limited, and on the other hand, the improvement degree of the thinness of the LED display screen module is limited, and the existing display screen is not convenient for realizing chip-level integration of the LED display screen touch module, and thus cannot effectively improve the reliability and integration of the LED display screen.

[0005] A touch-enabled LED display screen comprises a PCB substrate, a control unit is mounted on the back of the PCB substrate, the control unit is used to control the display screen, and a plurality of touch control areas are arranged on the PCB substrate;

[0006] A data transmitter connected to the control unit is provided on the back of the PCB substrate and at a position corresponding to each touch control area, and each touch control area includes a plurality of LED modules regularly mounted on the PCB substrate;

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

[0008] The light board is mounted with a plurality of LED lamp beads arranged in rows and columns, a touch sensing chip is mounted at the bottom end of one of the LED lamp beads at the center of the light board, the touch sensing chip is mounted on a PCB substrate via an insulating colloid, and a data output end of the touch sensing chip is electrically connected to a data transmitter via a signal amplification circuit.

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

[0010] Preferably, the LED driving circuit includes a group of column constant current driving chip circuits and a group of row driving chip circuits, the column constant current driving chip circuits are electrically connected to the anode and cathode ends of the LED lamp beads in the same column, and the row driving chip circuits are electrically connected to the anode and cathode ends of the LED lamp beads in the same row.

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

[0012] Preferably, the control unit is respectively connected to the control end of each row driver chip circuit and the control end of each column constant current driver chip circuit, and the control unit is used to control the output current of each row driver chip circuit and each column constant current driver 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 include a blue chip, a green chip and a red chip respectively.

[0015] Preferably, the touch sensing chip 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.

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

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

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

[0019] Figure 1 A schematic diagram of the structure of a display screen designed for a touch-enabled LED display screen of the present invention;

[0020] Figure 2 For the present invention Figure 1 A schematic diagram of the structure from another perspective;

[0021] Figure 3 It is a schematic diagram of the exploded structure of the touch sensing chip and the light board of the present invention;

[0022] Figure 4 This is a structural schematic diagram of a constant current drive chip circuit of the present invention;

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

[0024] Figure 6 It is a structural schematic diagram of the driving chip circuit of the present invention;

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

[0026] Figure 8 It is a structural schematic diagram of the LED driving circuit of the present invention.

[0027] In the figure:

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

[0029] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] As attached Figure 1 To Attachment Figure 8 As shown: a touch-enabled 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 arranged on the PCB substrate 1. The touch control areas 3 are square areas with a size of 60 mm×60 mm;

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

[0032] 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. Each touch control area 3 includes a plurality of LED modules regularly mounted on the PCB substrate 1.

[0033] The LED module includes a light board 6 and an LED driving circuit connected to the PCB substrate 1, 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 6mm×6mm;

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

[0036] A touch sensing chip 5 is installed at the bottom end of an LED lamp bead 7 at the center of the lamp board 6. The touch sensing chip 5 is installed on the PCB substrate 1 through an insulating colloid. The touch sensing chip 5 is provided with a touch signal input circuit. The touch signal input circuit is used to sense external touch actions and generate a capacitance change signal to be sent to the touch sensing chip 5.

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

[0038] The control unit 2 includes a collection module for collecting position information of the touch sensing chip 5 , and the collection module collects the X-axis coordinate and the Y-axis coordinate of each touch sensing chip 5 ;

[0039] The LED driving circuit includes a group of column constant current driving chip circuits and a group of row driving chip circuits. The column constant current driving chip circuits are electrically connected to the anode and cathode ends of the LED lamp beads 7 in the same column, and the row driving chip circuits are electrically connected to the anode and cathode ends of the LED lamp beads 7 in the same row.

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

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

[0043] In this touch-controlled LED display, a touch sensing chip 5 is used. The touch sensing chip 5 is integrated inside the LED lamp bead 7. An LED lamp bead 7 with an integrated 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 a 60*60mm area. The LED display is divided into 60*60mm areas. The area control is achieved through data control, and finally the touch control of the display is achieved. The above design, on the one hand, improves the touch response speed of the LED display, and on the other hand, improves the thinness of the module. In addition, the LED display realizes chip-level integration of the touch module, which improves the reliability and high integration of the overall solution.

[0044] The embodiments of the present invention are provided for the purpose 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 cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A touch-enabled LED display. It is 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, Features: 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, Features: 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, Features: 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, Features: 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, Features: 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, Features: The LED lamp beads (7) respectively include a blue chip, a green chip and a red chip.

8. A touch-enabled LED display screen as claimed in claim 1, Features: 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, Features: 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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