An LED lamp realizes touch function's device, touch display screen and electronic product

Abstract

This invention discloses a device, a touch display screen, and an electronic product for implementing touch functionality on LED lights, relating to the field of touch screen technology. The device includes an LED array, a touch control chip, and at least one horizontal drive chip. A touch structure is provided on the LED array. A first portion of the GPIO ports of the touch control chip is connected to the touch structure, a second portion of the GPIO ports of the touch control chip is connected to the horizontal drive chip, and a third portion of the GPIO ports of the touch control chip is configured as an SEG port connected to the common anode of the LED array. The horizontal drive chip is configured with a COM port for connecting to the common cathode of the LED array. When multiple horizontal drive chips are used, each horizontal drive chip is connected in series, and the COM port of each horizontal drive chip is connected to a set of common cathodes of the LED array. This invention can flexibly expand the number of LED arrays and can simultaneously implement touch functionality and image display functionality.

Description

Technical Field

[0001] This invention relates to the field of touch displays, and more particularly to a device for implementing touch functionality on an LED lamp, a touch display, and electronic products. Background Technology

[0002] In existing electronic products, such as electronic cigarette display units, LEDs are typically arranged in various patterns, with the number of LEDs ranging from dozens to hundreds. To achieve touch functionality on these LED display arrays, a new LED-based touch technology has emerged. This technology directly integrates the LEDs and touch-sensing patterns onto the same FPC or PCB board. A single touch chip handles both LED illumination and touch sensing, operating in a time-sharing manner. During touch scanning detection, waveforms identical to the touch detection signal are projected at both ends of the LEDs, ensuring that touch detection is unaffected by the operation of the LEDs.

[0003] While the aforementioned new LED-based touch technology solves the problems of high cost and inflexibility of ITO (Indium Tin Oxide) sensors, the touch chip cannot have too many peripheral pins due to cost and technical reasons. Furthermore, the more LEDs there are, the greater the operating current, which leads to the complexity of the touch chip design and thus greatly limits the number of LEDs.

[0004] Another solution involves a touch chip and a lamp driver chip. In this solution, the LED is completely controlled by the lamp driver chip. Although it can achieve time-sharing operation of touch scanning and LED, it cannot output waveforms at both ends of the LED that are exactly the same as the touch detection signal. Therefore, the LED and its wiring will affect the load of the touch channel, resulting in reduced touch detection sensitivity and easy interference.

[0005] Therefore, a new method is needed that can flexibly expand the number of LEDs and ensure that the two ends of the LEDs maintain the same signal as the touch scan waveform during the touch scan cycle, thereby reducing the impact on touch detection. Summary of the Invention

[0006] The purpose of this invention is to provide a device, a touch display screen, and an electronic product that implements touch functionality on an LED lamp, thereby solving the aforementioned technical problems. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a device for implementing touch functionality on an LED lamp, comprising an LED lamp array, a touch control chip, and at least one horizontal drive chip. The LED lamp array is provided with a touch structure. A first portion of the GPIO ports of the touch control chip is connected to the touch structure, a second portion of the GPIO ports of the touch control chip is connected to the horizontal drive chip, and a third portion of the GPIO ports of the touch control chip is configured as an SEG port connected to the common anode of the LED lamp array. The horizontal drive chip is configured with a COM port for connecting to the common cathode of the LED lamp array. When there are multiple horizontal drive chips, each horizontal drive chip is connected in series, and the COM port of each horizontal drive chip is respectively connected to a set of common cathodes of the LED lamp array.

[0009] In at least one embodiment, when the touch chip detects the touch signal of the touch structure through the first part of the GPIO port, the signal output by the third part of the GPIO port has the same voltage magnitude, the same frequency, and the same phase as the signal output by the first part of the GPIO port until the touch cycle ends.

[0010] In at least one embodiment, when the touch chip detects the touch signal of the touch structure through the first part of the GPIO port, the touch chip controls the row driver chip to configure its COM port to a high-impedance mode until the touch cycle ends.

[0011] In at least one embodiment, when the touch chip outputs an LED anode lighting signal to the LED array through the third part of the GPIO port, the first part of the GPIO port stops outputting a touch detection signal, and the touch chip controls the row driver chip to configure its COM port to a row-by-row conduction mode until the lighting cycle ends.

[0012] In at least one embodiment, the LED anode signal output during the lighting cycle includes the lighting time period corresponding to each row of LEDs. When the lighting time period of one row of LEDs arrives, the COM port of the LEDs in that row is set to low level, the anode signal of the LEDs in that row that need to be lit is set to high level, and the anode signal of the other LEDs in that row that do not need to be lit is set to low level.

[0013] In at least one embodiment, when there is one row driver chip, the LED array consists of n The array is formed by connecting the cathodes of n LEDs in each column to form a common cathode, resulting in m common cathodes. Each common cathode is connected to a different COM port of the row driver chip. The anodes of m LEDs in each row are connected to form a common anode, resulting in n common anodes. Each common anode is connected to a different SEG port of the contact chip.

[0014] In at least one embodiment, when there are k row driver chips, k ≥ 2, and the LED array consists of n (m) k) The array is formed by connecting the cathodes of n LEDs in each column to form a common cathode, resulting in k groups of common cathodes. Each group has m common cathodes, and each group of common cathodes is connected to a row driver chip. Each common cathode in each group is connected to a different COM port of its corresponding row driver chip; the m LEDs in each row... The anodes of k LEDs are connected to form a common anode, resulting in n common anodes. Each common anode is connected to a different SEG port of the contact chip.

[0015] In at least one embodiment, a power supply switch circuit for the horizontal drive chip, which is connected to both the touch chip and the horizontal drive chip, is further included. When the touch chip is in standby mode, the touch chip controls the power supply switch circuit for the horizontal drive chip to turn off the power supply to the horizontal drive chip and sets all control signals connected to the horizontal drive chip to a low level. When the touch chip enters a touch cycle from standby mode, the touch chip controls the power supply switch circuit for the horizontal drive chip to turn on the power supply to the horizontal drive chip, and after the touch cycle ends, the power supply to the horizontal drive chip is turned off.

[0016] As a shared inventive concept, the present invention also provides a touch display screen, including the device for implementing touch function on an LED lamp as described above. The touch display screen includes a two-layer structure, with the LED lamp array and the touch structure both disposed on the same layer, and the LED lamp traces and the touch channel traces both disposed on the other layer.

[0017] In at least one embodiment, the touch structure is a copper foil surrounding each of the LEDs in the LED array, and the touch structure is divided into multiple regions, each region being isolated from each other.

[0018] As part of the common inventive concept, the present invention also provides an electronic product, including a touch display screen as described above.

[0019] Implementing one of the above-described technical solutions of the present invention has the following advantages or beneficial effects:

[0020] This invention allows for flexible expansion of the number of LED arrays through a line driver chip. By combining the line driver chip with a touch chip, touch functionality and image display functionality can be simultaneously achieved on the LED array. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0022] Figure 1 This is a structural diagram of a device for implementing touch functionality on an LED lamp according to an embodiment of the present invention;

[0023] Figure 2 This is a circuit diagram of an LED light array driven by a touch chip and a line driver chip according to an embodiment of the present invention;

[0024] Figure 3 This is a waveform diagram of a touch channel and two ends of an LED light in a touch scanning and LED lighting working mode according to an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the waveforms of the touch detection signal and the two ends of the LED light in a standby mode according to an embodiment of the present invention;

[0026] Figure 5 This is a circuit diagram of a touch chip according to an embodiment of the present invention;

[0027] Figure 6 This is a circuit diagram of a line driver chip according to an embodiment of the present invention;

[0028] Figure 7 This is a circuit diagram of a power supply switch circuit for a line drive chip according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of a touch display pattern layer according to an embodiment of the present invention. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, various exemplary embodiments described below will be referenced to the accompanying drawings, which form part of the exemplary embodiments, illustrating various exemplary embodiments that may be used to implement the present invention. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. It should be understood that they are merely examples of processes, methods, and apparatuses consistent with some aspects of the present invention disclosed as detailed in the appended claims, and other embodiments may be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and spirit of the present invention.

[0031] In the description of this invention, the term "multiple" means two or more. The terms "connected" and "linked" should be interpreted broadly, for example, they can refer to fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, communication connections, direct connections, indirect connections via an intermediate medium, or connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] To illustrate the technical solution described in this invention, specific embodiments are described below, showing only the parts related to the embodiments of this invention.

[0033] Example 1: As Figure 1 As shown, this embodiment of a device for implementing touch functionality on an LED lamp includes an LED lamp array, a touch control chip, and at least one horizontal drive chip. The LED lamp array has a touch structure. The first part of the GPIO ports of the touch control chip is connected to the touch structure, the second part of the GPIO ports of the touch control chip is connected to the horizontal drive chip, and the third part of the GPIO ports of the touch control chip is configured as an SEG port connected to the common anode of the LED lamp array. The horizontal drive chip has a COM port for connecting to the common cathode of the LED lamp array. When there are multiple horizontal drive chips, each horizontal drive chip is connected in series, and the COM port of each horizontal drive chip is connected to a set of common cathodes of the LED lamp array.

[0034] Based on the above embodiments, the touch chip meets the following conditions:

[0035] 1. The third part of the GPIO port has a constant current output function and can be configured with different current values ​​by software to meet the needs of different lamp types;

[0036] 2. The first part of the GPIO ports uses self-capacitance detection mode, and different sensitivities can be configured;

[0037] 3. All GPIO ports can output touch scan waveforms, and the output waveforms are guaranteed to be consistent in terms of voltage magnitude, frequency, and phase.

[0038] Furthermore, the line driver chip meets the following conditions:

[0039] 1. Built-in multiple NMOS driver transistors, typically 8 or 16;

[0040] 2. Serial data control, supporting multi-chip cascading.

[0041] It should be noted that the row driver chip in this embodiment is a dedicated integrated circuit used in LED dot matrix, LED display, and LED array backlighting to uniformly select, switch, and drive LED beads row by row. It belongs to the row channel control unit in the LED scanning drive system. It is equivalent to the master switch that controls "which row of LEDs is lit", responsible for selecting the row lines of the LED array one by one, providing a current path for the entire row of LEDs; and working with the column driver to complete dynamic scanning display. The row driver chip in this embodiment is an NMOS transistor type, and its output pin is connected to the cathode of the LED. The LED adopts a common cathode circuit design, while the touch chip has column driver function and outputs a constant current control signal.

[0042] This device can flexibly expand the number of LED arrays through the line driver chip. By cooperating with the touch chip, the line driver chip can simultaneously realize touch function and image display function on the LED array.

[0043] In one or more embodiments, a main control board is also included, which is connected to the fourth part of the GPIO port of the touch chip via an interface. While collecting touch information and LED lighting information from the touch chip, the main control board can also provide power to the entire device.

[0044] Based on the above embodiments, if a single touch chip is used to complete LED lighting and touch detection, taking a common touch chip with 32 GPIO ports as an example, 3 GPIOs are used for the interface with the main control terminal, and the touch area uses 3... With 3 = 9 GPIO ports, there are 20 GPIO ports remaining, which are used for LED lighting. If COM-SEG mode is used, a maximum of 10 can be configured. 10 = 100 LEDs; if using a forward and reverse push mode, theoretically a maximum of 20 can be made. 19 = 380 LEDs; forward and reverse push mode requires each GPIO port to have a very large current sinking capability (e.g., 5mA for one LED, 20...). (5mA = 100mA), which places very high demands on the design of touch chips.

[0045] This device also uses a touch chip with 32 GPIO ports, with 3 GPIO ports used for the interface with the main control unit, and the touch area uses 3... With 3 = 9 GPIO ports, and the row driver chip using 4 GPIO ports, 16 GPIO ports remain. These 16 GPIO ports are used as SEG ports, and the row driver chip is used as the COM port. If a 16-channel row driver chip is selected, one chip can support 16 LEDs. 16 = 256. Using a scheme with two cascaded line driver chips, it can support 16 LEDs. 32 = 512. Most importantly, the SEG port used for constant current output on the touch chip only needs to output 5mA per GPIO port. The total drive current of the 16 GPIO ports of the entire touch chip is only 80mA, significantly reducing the design requirements for the touch chip. Meanwhile, each COM port of the horizontal drive chip can support more than 1A of current, ensuring consistent brightness for each LED.

[0046] In one or more embodiments, when there is one row driver chip, the LED array consists of n The array is formed by connecting the cathodes of n LEDs in each column to form a common cathode, resulting in m common cathodes. Each common cathode is connected to a different COM port of the row driver chip. The anodes of m LEDs in each row are connected to form a common anode, resulting in n common anodes. Each common anode is connected to a different SEG port of the contact chip.

[0047] like Figure 2 As shown, the horizontal drive chip has 12 COM ports, and the third part of the touch chip has 14 GPIO ports. The LED array has 14... The system uses a 12-array configuration with a total of 168 LEDs, employing a COM-SEG lighting mode. The cathodes of the 14 LEDs in each column are connected to form a common cathode, resulting in 12 common cathodes. Each common cathode is connected to a different COM port on the row driver chip, with each COM port connected one-to-one to a common cathode. Similarly, the anodes of the 12 LEDs in each row are connected to form a common anode, resulting in 14 common anodes. Each common anode is connected to a different SEG port on the touch controller chip, with each SEG port connected one-to-one to a common anode.

[0048] Furthermore, when there are k drive chips, k ≥ 2, and the LED array consists of n (m) k) An array is formed, where the cathodes of n LEDs in each column are connected to form a common cathode, resulting in m... There are k common cathodes, each connected to a different COM port of its corresponding row driver chip; the anodes of the LEDs in each row are connected to form a common anode, resulting in n common anodes, each connected to a different SEG port of the control chip. Thus, the number of LEDs increases by a factor of k.

[0049] In one or more embodiments, when the touch chip detects the touch signal of the touch structure through the first part of the GPIO port, the signal output by the third part of the GPIO port has the same voltage magnitude, the same frequency and the same phase as the signal output by the first part of the GPIO port until the touch cycle ends.

[0050] Furthermore, when the touch chip detects the touch signal of the touch structure through the first part of the GPIO port, the touch chip controls the line driver chip to configure its COM port to high impedance mode until the touch cycle ends.

[0051] To make it easier to understand, because the LED lights and touch-sensing patterns are designed on the same FPC or PCB board, the interference of the LED lights on touch detection is very large when the LED lights are working. Therefore, it is required that the LED lighting and touch detection work in a time-sharing manner. During touch detection, in order to ensure that the related components and traces of the LED lights do not interfere with the touch channel, it is required that the waveforms on the lines at both ends of all LED lights be exactly the same as those on the touch detection channel during the touch detection scanning process. For the touch channel, at any moment of touch detection, there is no voltage difference between the LED light lines and the touch detection channel lines. Therefore, the LED light lines will not cause changes in the load capacitance of the touch detection channel, ensuring the sensitivity and consistency of touch detection.

[0052] Based on the above embodiments, when the touch channel is detected, the SEG port of the touch chip will also output a signal with the same voltage magnitude, frequency, and phase as the touch detection signal. This signal is connected to the anode of all LEDs. At the same time, the touch chip will control the horizontal drive chip to stop lighting up the LEDs. All COM port pins are set to high impedance mode. Utilizing the diode characteristics of the LEDs, the signal on the anode will be transmitted to the cathode of the LEDs, thus ensuring that both ends of all LEDs are the same as the touch detection signal.

[0053] In one or more embodiments, when the touch chip outputs an LED anode lighting signal to the LED array through the third part of the GPIO port, the first part of the GPIO port stops outputting the touch detection signal, and the touch chip controls the row driver chip to configure its COM port to progressive pass mode until the lighting cycle ends.

[0054] Furthermore, in the row-by-row conduction mode, the LED anode signal output during the lighting cycle includes the lighting time period for each row of LEDs. When the lighting time period for one row of LEDs arrives, the COM corresponding to that row of LEDs is set to low level, the anode signal of the LEDs that need to be lit in that row is high level, and the LEDs that do not need to be lit in that row are set to low level.

[0055] like Figure 3The diagram shows the waveforms of the SEG and COM ports at both ends of a touch channel and an LED light in the touch scanning and LED lighting operation modes. In a specific embodiment, the touch and lighting cycle is generally set to within 10ms to ensure that the LED light refresh rate is greater than 100Hz and there is no flickering. The touch detection signal and the LED anode signal (SEG port) are controlled by the touch chip, while the LED cathode signal (COM port) is controlled by the line driver chip.

[0056] During the touch scanning time period corresponding to the touch cycle, the touch detection channel and SEG port of the touch chip output the same touch detection signal. The touch chip also controls the horizontal drive chip to configure the COM port to be in a floating state. In this way, by utilizing the diode conduction characteristics of the LED, the touch detection signal output from the SEG port is transmitted to the cathode of the diode, thus ensuring that the signal waveforms at both ends of the LED are the same during touch detection. In the working mode, the horizontal drive chip is always powered.

[0057] During the lighting period corresponding to the lighting cycle, the touch channel does not output any signal and remains at a low level. The SEG port of the touch chip outputs a high level during the period when the LED needs to be lit, and outputs a low level during the period when the LED does not need to be lit. The touch chip controls the row driver chip to enter the progressive pass mode, outputting a low level when a row of LEDs is lit, and remaining in a floating state when it is not lit.

[0058] In one or more embodiments, a power supply switch circuit for the horizontal drive chip, which is connected to both the touch chip and the horizontal drive chip, is also included. When the touch chip is in standby mode, the touch chip controls the power supply switch circuit for the horizontal drive chip to turn off the power supply to the horizontal drive chip and sets all control signals connected to the horizontal drive chip to a low level. When the touch chip enters the touch cycle from standby mode, the touch chip controls the power supply switch circuit for the horizontal drive chip to turn on the power supply to the horizontal drive chip. After the touch cycle ends, the power supply to the horizontal drive chip is turned off.

[0059] To understand this, existing line-drive chips generally lack a low-power mode, with quiescent current in the hundreds of microamps, resulting in excessive standby power consumption for battery-powered e-cigarette lamps. Therefore, a power switch designed with a PMOS transistor is added. In standby mode, the touch chip controls the switch to shut off the power supply to the line-drive chip and sets all control signals connected to the line-drive chip to a low level, thus achieving the low-power requirement.

[0060] However, turning off the horizontal drive chip brings a new problem. In standby mode, the touch chip intermittently detects the touch channel signal. For example, the touch chip sleeps for 200ms and wakes up to detect for 1ms, repeating this cycle. After the horizontal drive chip is powered off, the COM port pin cannot maintain a high-impedance mode, which will affect the signal at both ends of the LED. Therefore, when the touch chip wakes up to detect, the power supply of the horizontal drive chip should be turned on first, and the power supply of the horizontal drive chip should be turned off after the detection is completed.

[0061] like Figure 4 The diagram shows the waveforms of the touch detection signal and the LED in standby mode. In a specific embodiment, a standby cycle can be set to around 200ms. Since the horizontal drive chip generally does not have a low-power mode and its static current is in the hundreds of microamps, the standby power consumption is too high for battery-powered electronic cigarette products. Therefore, a power switch designed with a PMOS transistor is added. When in standby mode, the touch chip controls the switch to turn off the power supply to the horizontal drive chip and sets all control signals connected to the horizontal drive chip to a low level, thus achieving the low-power requirement.

[0062] like Figures 5 to 7 As shown, taking a touch chip U1 and a horizontal drive chip U2 as an example, the design includes 14 SEG ports and 12 COM ports, supporting a total of 168 LEDs. The touch chip U1 can be a BLM32D. Pins 9 to 12 and 21 to 24 of the touch chip form the first part of the GPIO ports, used for detecting touch signals; pins 13 to 14, 17 to 20, and 29 to 36 form the third part of the GPIO ports, used as SEG ports; pins 1 to 3 form the second part of the GPIO ports, used for connecting to the horizontal drive chip.

[0063] The U2 driver chip model can be SM5389N. Pins 5 to 8 and pins 17 to 18 to 24 of the driver chip are 12 COM ports; pins 2 to 4 are used to connect to the contact chip.

[0064] It should be noted that unused SEG ports and COM ports are left floating.

[0065] The power supply switch circuit for the horizontal drive chip includes a PMOS switch Q1, which can be a CJ3139. The source of the PMOS switch is connected to the power supply, such as through the main control board, and is connected to the power port of the main control board. The drain of the PMOS switch is connected to pin 15 of the horizontal drive chip. The gate of the PMOS switch is connected to pin 8 of the touch chip through a parallel resistor R2 and a capacitor C7. The power supply switch circuit for the horizontal drive chip controls the power supply of the horizontal drive chip. In the working mode, HQ_EN is always kept low, the PMOS transistor is turned on, and the horizontal drive chip is continuously powered. In standby mode, HQ_EN is only set to low during the touch detection period, and the horizontal drive chip is powered intermittently.

[0066] In summary, this embodiment allows for flexible expansion of the number of LEDs in a touch-enabled LED array by adding a horizontal drive chip, while ensuring that the two ends of the LEDs maintain signals identical to the touch scan waveform during the touch scan cycle, thus reducing the impact on touch detection. The addition of a PMOS switching circuit ensures that the COM port of the horizontal drive chip remains floating during the touch scan period in standby mode through intermittent power supply, achieving the low power consumption requirement of the horizontal drive chip.

[0067] Example 2: Figure 8 As shown, with the same inventive concept, this embodiment provides a touch display screen, including a device for implementing touch function on an LED lamp as described in Embodiment 1. The touch display screen includes a two-layer structure, with the LED lamp array and the touch structure both disposed on the same layer, and the LED lamp traces and the touch channel traces both disposed on the other layer.

[0068] In a specific embodiment, the entire LED display area is divided into nine equally sized regions. The copper foil of each region is isolated from each other, and each region is connected to a touch-sensing channel to realize click, swipe, and gesture functions on the LED array. The LED lights and touch channel traces are on the bottom layer of the FPC. Because the distance between the LED lights and their traces and the touch-sensing pattern and traces is very close, it does not meet the clearance distance required for touch self-capacitance (greater than 5mm). Therefore, it is required that the LED lighting and touch operation are time-division multiplexing. During touch detection scanning, the lines at both ends of the LED lights are exactly the same as the touch scanning signal. This ensures that adjacent LED lights and their lines do not interfere with touch detection.

[0069] In one or more embodiments, the touch structure is a copper foil surrounding each LED of the LED array, and the touch structure is divided into multiple regions, each region being isolated from each other.

[0070] In one or more embodiments, both layers are made of FPC or PCB board.

[0071] It should be noted that the device for implementing the touch function on the LED light in this embodiment is the same as that in Embodiment 1, as described in Embodiment 1.

[0072] Example 3: Following the same inventive concept, this example provides an electronic product, including the touchscreen display described in Example 2. The electronic product includes, but is not limited to, electronic cigarettes, electronic pens, laptops, keyboards, smartphones, smart glasses, and smart wearable devices.

[0073] It should be noted that the touch screen in this embodiment is the same as that in Embodiment 2, as described in Embodiment 2.

[0074] The above description is merely a preferred embodiment of the present invention. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. An apparatus for implementing a touch function on an LED lamp, characterized in that, The device includes an LED array, a touch chip, and at least one horizontal drive chip. The LED array has a touch structure. The first part of the GPIO port of the touch chip is connected to the touch structure. The second part of the GPIO port of the touch chip is connected to the horizontal drive chip. The third part of the GPIO port of the touch chip is configured as an SEG port and connected to the common anode of the LED array. The horizontal drive chip is configured with a COM port for connecting to the common cathode of the LED array. When there are multiple row drive chips, each row drive chip is connected in series, and the COM port of each row drive chip is connected to a common cathode of the LED array. The waveform signal output by the SEG port can be transmitted to the COM port controlled by the row drive chip through the LED array. When the touch chip detects the touch signal of the touch structure through the first part of the GPIO port, the signal output by the third part of the GPIO port has the same voltage magnitude, the same frequency and the same phase as the signal output by the first part of the GPIO port, until the touch cycle ends; The touch chip controls the line drive chip to configure its COM port to high-impedance mode until the touch cycle ends.

2. The device for realizing touch function on LED lamp according to claim 1, characterized in that, When the touch chip outputs an LED anode lighting signal to the LED array through the third part of the GPIO port, the first part of the GPIO port stops outputting a touch detection signal. The touch chip then controls the row driver chip to configure its COM port to progressive pass mode until the lighting cycle ends.

3. The device for implementing touch function on an LED lamp according to claim 2, characterized in that, The LED anode signal output during the lighting cycle includes the lighting time period corresponding to each row of LEDs. When the lighting time period of one row of LEDs arrives, the COM port of the LED in that row is set to low level, the anode signal of the LED in that row that needs to be lit is set to high level, and the anode signal of the other LEDs in that row that do not need to be lit is set to low level.

4. The device for realizing touch function on LED lamp according to claim 1, characterized in that, When there is one row driver chip, the LED array consists of n The array is formed by connecting the cathodes of n LEDs in each column to form a common cathode, resulting in m common cathodes. Each common cathode is connected to a different COM port of the row driver chip. The anodes of m LEDs in each row are connected to form a common anode, resulting in n common anodes. Each common anode is connected to a different SEG port of the contact chip. When there are k drive chips, k≥2, and the LED array consists of n (m) k) The array is formed by connecting the cathodes of n LEDs in each column to form a common cathode, resulting in k groups of common cathodes. Each group has m common cathodes, and each group of common cathodes is connected to a row driver chip. Each common cathode in each group is connected to a different COM port of its corresponding row driver chip; the m LEDs in each row... The anodes of k LEDs are connected to form a common anode, resulting in n common anodes. Each common anode is connected to a different SEG port of the touch control chip.

5. The device for implementing touch function on an LED lamp according to claim 1, characterized in that, It also includes a power supply switch circuit for the horizontal drive chip, which is connected to both the touch chip and the horizontal drive chip. When the touch chip is in standby mode, the touch chip controls the power supply switch circuit for the horizontal drive chip to turn off the power supply to the horizontal drive chip and sets all control signals connected to the horizontal drive chip to a low level. When the touch chip enters the touch cycle from standby mode, the touch chip controls the power supply switch circuit for the horizontal drive chip to turn on the power supply to the horizontal drive chip. After the touch cycle ends, the power supply to the horizontal drive chip is turned off again.

6. A touch display screen, characterized by The device for implementing touch function on an LED lamp as described in any one of claims 1-5, wherein the touch display screen comprises a two-layer structure, the LED lamp array and the touch structure are both disposed on the same layer, and the LED lamp traces and the touch channel traces are both disposed on the other layer.

7. The touch display screen of claim 6, wherein, The touch structure is a copper foil surrounding each LED in the LED array, and the touch structure is divided into multiple regions, each region being isolated from the others.

8. An electronic product, characterized by Includes a touch display screen as described in any one of claims 6-7.

Images