Display touch panel and lamp bead detection method

Abstract

The application is suitable for the technical field of electronic equipment, and provides a display touch panel and a lamp bead detection method.The display touch panel comprises a light-emitting detection array, a signal processing module and a control chip.The light-emitting detection array comprises a plurality of light-emitting detection lamp beads, each of which comprises a light detection chip and a light-emitting chip integrated on the same substrate;each light detection chip is configured to receive reflected light reflected by a touch object and generate a corresponding detection electrical signal based on the reflected light;the signal processing module is connected to the plurality of light detection chips and is configured to perform signal processing on the detection electrical signal to obtain a digital signal set;and the control chip is connected to the signal processing module and is configured to output a touch coordinate based on the digital signal set to realize touch coordinate detection of the touch object.The light detection chip and the light-emitting chip integrated on the same substrate in each light-emitting detection lamp bead not only realize pixel-level touch, but also improve the integration.

Description

Technical Field

[0001] This application belongs to the field of electronic equipment technology, and in particular relates to a method for detecting display touch panels and LED beads. Background Technology

[0002] Currently, light-emitting diode (LED) displays are evolving towards greater precision and interactivity, with touch functionality becoming crucial for enhancing user experience. Existing technologies typically implement touch functionality through an infrared frame (also known as an infrared touch frame). Specifically, infrared emitters and receivers are installed around the perimeter of the display, forming an infrared grating matrix. When a finger or object touches the screen, it blocks infrared light at a specific location, and the touch coordinates are then calculated using the blocked emitter-receiver channels.

[0003] However, existing infrared frame solutions involve installing infrared emitters and receivers around the perimeter of the display screen, which results in low integration. At the same time, the density of the infrared grating is limited by the number of infrared tubes, making it difficult to achieve pixel-level touch control. Summary of the Invention

[0004] This application provides a method for detecting a display touch panel and LED beads to solve the problems of low integration and inability to achieve pixel-level touch in the prior art.

[0005] In a first aspect, embodiments of this application provide a display touch panel, which includes a light-emitting detection array, a signal processing module, and a control chip. The light-emitting detection array includes a plurality of light-emitting detection LEDs, and each light-emitting detection LED includes a light-emitting chip integrated on the same substrate and a light-emitting chip for emitting light. Each optical detection chip is configured to receive reflected light from the object being touched and to generate a corresponding detection electrical signal based on the reflected light. The signal processing module connects to several optical detection chips and is configured to process the detected electrical signals to obtain a set of digital signals. The control chip, connected to the signal processing module, is configured to output touch coordinates based on a set of digital signals in order to detect the touch coordinates of the object being touched.

[0006] Optionally, the reflected light is obtained by reflecting the light output from the light-emitting chip; correspondingly, The control chip is also configured to send a drive signal to the light-emitting chip when the display screen where the touch panel is located is in touch mode; the drive signal includes an initial display drive signal and a touch bottom light drive signal, the initial display drive signal carries the initial grayscale value of the light-emitting chip in touch mode, and the touch bottom light drive signal carries the set grayscale value of the light-emitting chip in touch mode, the initial grayscale value is different from the set grayscale value. The light-emitting chip is also configured to output light under a drive signal to provide a light source for touch signals.

[0007] Optionally, the reflected light is obtained by reflecting ambient light, or the reflected light is obtained by reflecting non-visible light; correspondingly, The control chip is also configured to send an initial display drive signal to the light-emitting chip when the display screen where the touch panel is located is in touch mode. The initial display drive signal carries the initial grayscale value of the light-emitting chip in touch mode. The light-emitting chip is also configured to either not output any light under the initial display drive signal, or to output only display light under the initial display drive signal.

[0008] Optionally, the light-emitting chip includes at least one set of light-emitting devices, and the set of light-emitting devices includes light-emitting devices of at least one color.

[0009] Optionally, the light-emitting detection chip also includes a non-visible light-emitting chip; the non-visible light-emitting chip and the light-detection chip are located on the same side of the same substrate; A non-visible light-emitting chip is configured to output non-visible light to provide a light source for touch signals; The light detection chip is also configured to receive non-visible light, as well as reflected light generated by the touch object.

[0010] Optionally, the signal processing module includes several signal conditioning circuits, each corresponding to a number of light-emitting detection LEDs. The signal conditioning circuits and the light-emitting chips and light-detecting chips in the corresponding light-emitting detection LEDs are integrated on the substrate of the corresponding light-emitting detection LEDs.

[0011] Optionally, the signal conditioning circuit and the photodetector chip are located on the same side of the same substrate; The signal conditioning circuit is connected to the photodetector chip and is configured to process the detected electrical signal to obtain the corresponding digital signal.

[0012] Optionally, the light-emitting detection LED also includes a light-shielding module, which is located between the light-emitting chip and the light-detecting chip, or above the light-emitting chip and the light-detecting chip, to reduce the interference of the light output by the light-emitting chip on the light-detecting chip.

[0013] Secondly, embodiments of this application provide a method for detecting LED beads, applied to LED beads for light emission detection in a display touch panel as described in any of the first aspects, the method comprising: Control the light-emitting device of any color in the light-emitting detection lamp beads to be in the lit state; Read the current signal value output by the light detection chip in the light-emitting detection LED bead; The current difference between the current signal value and the reference signal value is calculated; the reference signal value refers to the calibration value output by the photodetector chip when a light-emitting device of any color emits light in the calibration state. Based on the current difference, determine the health test result of the light-emitting detection lamp bead.

[0014] Optionally, after calculating the difference between the current signal value and the reference signal value, the method further includes: In response to the current difference being greater than a set difference, the driving signal of the light-emitting device of any color is adjusted; Controls light-emitting devices of any color to output light under an adjusted driving signal; Read the target signal value output by the optical detection chip; The target difference between the target signal value and the reference signal value is calculated. If the target difference is greater than the set difference, return to the step of adjusting the drive signal of the light-emitting device of any color and subsequent steps until the latest target difference is less than the set difference.

[0015] Thirdly, embodiments of this application provide a control chip, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the LED detection method as described in any one of the second aspects above.

[0016] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the LED detection method as described in any one of the second aspects above.

[0017] Fifthly, embodiments of this application provide a computer program product that, when run on a control chip, enables the control chip to execute the LED detection method described in any of the second aspects above.

[0018] The beneficial effects of the embodiments of this application compared with the prior art are: This application provides a display touch panel comprising a light-emitting detection array, a signal processing module, and a control chip. The light-emitting detection array includes several light-emitting detection LEDs, each of which includes a light-detecting chip and a light-emitting chip integrated on the same substrate. Each light-detecting chip is configured to receive reflected light from a touch object and generate a corresponding detection electrical signal based on the reflected light. The signal processing module, connected to the several light-detecting chips, is configured to process the detection electrical signals to obtain a digital signal set. The control chip, connected to the signal processing module, is configured to output touch coordinates based on the digital signal set, thereby realizing the detection of touch coordinates of the touch object. In this application, the corresponding light-detecting chip and light-emitting chip are integrated on the substrate of the corresponding light-emitting detection LED, eliminating the need for separate fabrication and bonding of the light-emitting layer and photosensitive layer, resulting in high device integration. Furthermore, the one-to-one correspondence between the light-emitting chip and the light-detecting chip enables pixel-level touch control. In addition, the extremely close physical distance between the light-emitting and photosensitive devices within the same light-emitting detection LED results in a short reflected light transmission path and minimal light signal attenuation, thereby improving touch response speed. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a display touch panel provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of a display touch panel provided in another embodiment of this application; Figure 3 This is a schematic diagram of a light-emitting detection lamp bead provided in an embodiment of this application; Figure 4 This is a schematic diagram of the light-emitting detection lamp bead under a complete black command when the touch signal light source is the output light source of the light-emitting chip and the display screen is in different working modes, according to an embodiment of this application. Figure 5 This is a schematic diagram of the touch panel displaying a completely black command when the touch signal light source is the output light source of the light-emitting chip and the display screen is in different working modes, according to an embodiment of this application. Figure 6 This is a schematic diagram of a signal conditioning circuit and a corresponding light-emitting detection LED integrated on a driver substrate according to an embodiment of this application; Figure 7This is a schematic diagram showing the signal conditioning circuit, the corresponding light-emitting chip, and the light detection chip integrated on a substrate inside a corresponding light-emitting detection lamp bead, according to an embodiment of this application. Figure 8 This is a schematic diagram of the specific structure of a light-emitting detection lamp bead provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of a light-emitting detection lamp bead provided in another embodiment of this application; Figure 10 This is a schematic diagram of the structure of a light-emitting detection lamp bead when the touch signal light source is ambient light, as provided in an embodiment of this application. Figure 11 A schematic diagram of the structure of the light-shielding layer, the light-emitting chip, and the light-detecting chip when the touch signal light source is ambient light, as provided in an embodiment of this application; Figure 12 A schematic diagram of the structure of a light-emitting detection lamp bead when the touch signal light source is non-visible light, as provided in an embodiment of this application; Figure 13 This is a flowchart illustrating the implementation of a lamp bead detection method according to an embodiment of this application; Figure 14 This is a flowchart illustrating the implementation of a lamp bead detection method according to another embodiment of this application; Figure 15 This is a schematic diagram of the structure of a control chip provided in an embodiment of this application. Detailed Implementation

[0021] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0022] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0023] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0025] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0027] Please see Figure 1 , Figure 1 This is a schematic diagram of a display touch panel provided in one embodiment of this application. The display touch panel is used to implement the touch function of the display screen.

[0028] like Figure 1 As shown, the display touch panel 1 may include: a light emission detection array 10, a signal processing module 20, and a control chip 30. The light emission detection array 10 includes a plurality of light emission detection LEDs 11, each of which includes a light detection chip 112 and a light emission chip 111 integrated on the same substrate.

[0029] Please refer to the following: Figure 2 , Figure 2 This is a schematic diagram of the structure of a display touch panel provided in another embodiment of this application. For example... Figure 2 As shown, several light-emitting detection LEDs in the display touch panel are arranged in an array to form a light-emitting detection array.

[0030] It should be noted that each light-emitting chip 111 and light-detecting chip 112 is integrated on the substrate inside the corresponding light-emitting detection lamp bead 11.

[0031] For example, please refer to Figure 3 , Figure 3 This is a schematic diagram showing a light-emitting chip and a corresponding light-detecting chip integrated on a substrate inside a light-emitting detection lamp bead, according to an embodiment of this application.

[0032] In practical applications, the light-emitting chip 111 is a solid-state semiconductor device that directly converts electrical energy into light energy.

[0033] The optical detection chip 112, also known as a photodetector (PD), is short for photodiode. Its core function is to convert optical signals into electrical signals.

[0034] It should be noted that each light-emitting detection LED may also include a pad (not shown in the figure) connected to the light detection chip.

[0035] In practical applications, pads are metallized areas on printed circuit boards (PCBs) used for soldering the pins of electronic components. Their core function is to achieve electrical connection and mechanical fixation between components and circuit wires.

[0036] In this embodiment of the application, each optical detection chip 112 is configured to receive reflected light reflected by the touch object and generate a corresponding detection electrical signal based on the reflected light.

[0037] The signal processing module 20 is connected to several optical detection chips 112 and is configured to process the detected electrical signals to obtain a set of digital signals.

[0038] The control chip 30 is connected to the signal processing module 20 and is configured to output touch coordinates based on a set of digital signals in order to detect the touch coordinates of the touch object.

[0039] In this embodiment, when the display screen containing the touch panel 1 is in touch mode, it indicates that the display screen has a touch signal light source. Therefore, when a touch object comes into contact with the display screen, the touch signal light source present on the display screen will be reflected back to the touch panel 1 by the touch object. The touch object can be the user's finger or a stylus.

[0040] It should be noted that the touch signal light source refers to the reference probe light during optical touch detection, which only serves touch recognition and does not undertake image display.

[0041] In one embodiment of this application, the touch signal light source can be the output light source of the light-emitting chip 111. Therefore, the reflected light can be obtained by reflecting the light output by the light-emitting chip 111.

[0042] The output light source of the light-emitting chip 111 is the light source generated when the light-emitting chip 111 is lit.

[0043] In this embodiment, the control chip 30 is also configured to send a drive signal to the light-emitting chip 111 when the display screen where the touch panel 1 is located is in touch mode.

[0044] The light-emitting chip 111 is also configured to output light under a drive signal to provide a light source for touch signals.

[0045] The aforementioned driving signals may include initial display driving signals and touch bottom light driving signals.

[0046] The initial display drive signal carries the initial grayscale value of the light-emitting chip 111 in touch mode.

[0047] The touch-sensitive light-driving signal carries the set grayscale value of the light-emitting chip 111 in touch mode.

[0048] The initial grayscale value is different from the set grayscale value.

[0049] In this embodiment, the initial display drive signal is used to maintain the basic display effect of the display screen when the display screen is in touch mode.

[0050] The touch-based light drive signal is used to provide a stable light source for subsequent touch detection.

[0051] It should be noted that the initial grayscale value and the set grayscale value mentioned above can be determined according to actual needs, and there are no restrictions here. For example, the initial grayscale value can be 255.

[0052] Please see Figure 4 , Figure 4 This is a schematic diagram illustrating the illumination detection LED under a completely black command when the touch signal light source is the output light source of the light-emitting chip and the display screen is in different working modes, according to an embodiment of this application. Figure 4 As shown in (a), when the display is in non-touch mode, under the all-black command, the light-emitting detection LED will display a completely black screen effect; as Figure 4 As shown in (b), when the display screen is in touch mode, under the all-black command, since the initial grayscale value is 255 corresponding to the all-black command, and the set grayscale value is the grayscale value corresponding to gray, when the light-emitting detection lamp bead presents an all-black screen effect, the light-emitting chip in the light-emitting detection lamp bead can output a weak light based on the above-mentioned set grayscale value, so that the area where the light-emitting chip is located can present a gray screen effect.

[0053] Please refer to the following: Figure 5 , Figure 5 This is a schematic diagram illustrating the touch panel in a completely black command when the touch signal light source is the output light source of a light-emitting chip and the display screen is in different working modes, according to an embodiment of this application. Figure 5 As shown in (a), when the display is in non-touch mode, since none of the LEDs emit light, the entire touch panel is in a completely black state, and the individual LEDs are also in a completely black state. Figure 5 As shown in (b), when the display is in touch mode, since several light-emitting detection LEDs can output light corresponding to the set grayscale value, although the overall display state of the touch panel is completely black at this time, the display state of several light-emitting detection LEDs can be grayscale.

[0054] In another embodiment of this application, the touch signal light source can also be ambient light or independent non-visible light. The non-visible light can be infrared light.

[0055] In this embodiment, when the touch signal light source is ambient light, the reflected light can be obtained by reflecting the ambient light; when the touch signal light source is non-visible light, the reflected light can be obtained by reflecting the non-visible light.

[0056] Specifically, the control chip 30 is also configured to send an initial display drive signal to the light-emitting chip 111 when the display screen where the display touch panel 1 is located is in touch mode.

[0057] The light-emitting chip 111 is also configured to either not output any light under the initial display drive signal, or to output only display light under the initial display drive signal.

[0058] The initial display drive signal carries the initial grayscale value of the light-emitting chip 111 in touch mode.

[0059] When the initial grayscale value is 0, the light-emitting chip 111 can not output any light under the initial display drive signal.

[0060] When the initial grayscale value is not 0, the light-emitting chip 111 can only output display light under the initial display driving signal and does not provide a touch signal light source.

[0061] In this embodiment, when the touch signal light source is reflected back to the display touch panel 1 by the touch object, each light detection chip 112 can receive the reflected light reflected by the touch object and generate a corresponding detection electrical signal based on the reflected light.

[0062] The electrical signal being detected can be photocurrent.

[0063] In this embodiment of the application, after receiving the detection electrical signals sent by each optical detection chip 112, the signal processing module 20 can perform signal processing on the detection electrical signals to obtain a digital signal set.

[0064] The digital signal set includes the digital signals corresponding to the detection electrical signals generated by each optical detection chip 112.

[0065] It should be noted that the specific process of signal processing of the detection electrical signal by the signal processing module 20 can be found in existing analog-to-digital conversion technology, and will not be elaborated here.

[0066] In one embodiment of this application, the signal processing module 20 may include a plurality of signal conditioning circuits, each of which corresponds one-to-one with a plurality of light-emitting detection lamp beads 11. The signal conditioning circuits and the light detection chip 112 and light-emitting chip 111 in the corresponding light-emitting detection lamp beads 11 are integrated on the same substrate.

[0067] It should be understood that the one-to-one correspondence between several signal conditioning circuits and several light-emitting detection lamp beads 11 can be as follows: the number of signal conditioning circuits and light-emitting detection lamp beads 11 are equal, they are paired and combined in pairs, and the signal conditioning circuits and light-emitting detection lamp beads 11 are arranged in pairs in a regular manner, one-to-one paired and not overlapping.

[0068] In some possible embodiments, the display touch panel 1 may also include a driving substrate (not shown in the figure).

[0069] In this embodiment, each signal conditioning circuit and the corresponding light-emitting detection lamp bead 11 are integrated on the driving substrate.

[0070] Please see Figure 6 , Figure 6 This is a schematic diagram of a signal conditioning circuit and a corresponding light-emitting detection LED integrated on a driver substrate according to an embodiment of this application.

[0071] In some other possible embodiments, each signal conditioning circuit can be integrated on the same substrate as the light-emitting chip 111 and the light-detecting chip 112 in the corresponding light-emitting detection lamp bead 11. That is, each signal conditioning circuit is integrated on the substrate of the corresponding light-emitting chip 111 and the light-detecting chip 112.

[0072] It should be noted that the signal conditioning circuit and the light detection chip 112 are located on the same side of the substrate inside the light-emitting detection lamp bead 11.

[0073] For example, please refer to Figure 7 , Figure 7 This is a schematic diagram showing the signal conditioning circuit, the corresponding light-emitting chip, and the light detection chip integrated on a substrate inside a corresponding light-emitting detection lamp bead, according to an embodiment of this application.

[0074] In this embodiment, each signal conditioning circuit is integrated into the corresponding light-emitting detection lamp bead 11 and is configured to process the detection electrical signal generated by the light detection chip 112 in the corresponding light-emitting detection lamp bead 11 to obtain the digital signal corresponding to the light detection chip 112, thereby shortening the signal transmission path and reducing signal loss.

[0075] In practical applications, a signal conditioning circuit is a circuit that converts the analog signal output by a sensor into a digital signal.

[0076] In another embodiment of this application, the signal processing module 20 may include an analog front-end and an analog-to-digital converter.

[0077] In this embodiment, after receiving the detection electrical signals sent by each optical detection chip 112, the analog front end can perform analog processing on the detection electrical signals to obtain an analog signal set. The analog signal set may include the analog signal corresponding to each optical detection chip 112.

[0078] It should be noted that the specific implementation process of the above-mentioned analog front-end for simulating the detection electrical signal can be found in existing analog signal processing implementation processes, and will not be elaborated here.

[0079] In practical applications, the analog front-end (AFE) is responsible for the initial stage of processing analog signals. Its main task is to amplify and filter the analog signals.

[0080] In some possible embodiments, the analog front end may include a signal amplifier and a filter.

[0081] In this embodiment, after receiving the above-mentioned set of analog signals, the analog-to-digital converter can perform analog-to-digital conversion processing on the set of analog signals to obtain a set of digital signals.

[0082] It should be noted that the specific implementation process of the analog-to-digital converter for performing analog-to-digital conversion on the analog signal set can be found in existing analog-to-digital conversion technologies, and will not be elaborated here.

[0083] In practical applications, an analog-to-digital converter, or A / D converter for short, is a device that converts continuous analog signals into discrete digital signals.

[0084] In this embodiment of the application, after receiving the above-mentioned set of digital signals, the control chip 30 can output touch coordinates based on the set of digital signals.

[0085] In some possible embodiments, the control chip 30 can perform differential calculations on the digital signal set and the pre-stored background light baseline to minimize the influence of background light on touch detection, thereby obtaining a set of differences.

[0086] Among them, the background light baseline is used to describe the set of reference signals corresponding to several light detection chips 112 under background light without touch.

[0087] The difference set includes the differences corresponding to each optical detection chip 112.

[0088] In practical applications, the control chip 30 (Integrated Circuit, IC) can be a field-programmable gate array (FPGA), a microcontroller unit (MCU), or a microprocessor unit (MPU), and there are no restrictions here.

[0089] In this embodiment, the control chip 30 can subtract each digital signal in the digital signal set from the reference signal of the background light baseline belonging to the same light detection chip 112 to obtain the difference value corresponding to each light detection chip 112, thereby obtaining a difference value set. The difference value can be negative or positive.

[0090] After obtaining the set of differences, the control chip 30 notices that the light-blocking object will cause a significant difference between the detection signals output by the light detection chip 112 within the coverage area of ​​the object and those output by the light detection chip 112 outside the coverage area. This means the difference values ​​will show obvious anomalies. Therefore, the control chip 30 can sort the differences in the set from largest to smallest and determine the coordinates of the light detection chip 112 corresponding to a predetermined number of differences before sorting as the target touch coordinates. The predetermined number can be determined according to actual needs and is not limited here.

[0091] As can be seen from the above, the display touch panel provided in this application includes a light-emitting detection array, a signal processing module, and a control chip. The light-emitting detection array includes several light-emitting detection LEDs, each of which includes a light-detecting chip and a light-emitting chip integrated on the same substrate. Each light-detecting chip is configured to receive reflected light reflected by the touch object and generate a corresponding detection electrical signal based on the reflected light. The signal processing module is connected to several light-detecting chips and is configured to process the detection electrical signals to obtain a digital signal set. The control chip is connected to the signal processing module and is configured to output touch coordinates based on the digital signal set to realize the detection of touch coordinates of the touch object. In this application, the corresponding light-detecting chip and light-emitting chip are integrated on the substrate of the corresponding light-emitting detection LED, eliminating the need to separately fabricate and bond the light-emitting layer and the photosensitive layer, resulting in high device integration. At the same time, the one-to-one correspondence between the light-emitting chip and the light-detecting chip also realizes pixel-level touch. In addition, the physical distance between the light-emitting and photosensitive devices within the same light-emitting detection LED is extremely close, resulting in a short reflected light transmission path and small light signal attenuation, thereby improving the touch response speed.

[0092] In one embodiment of this application, the light-emitting chip 111 may include at least one set of light-emitting devices 101, and the set of light-emitting devices 101 includes light-emitting devices of at least one color.

[0093] It should be noted that light-emitting devices refer to electronic components that utilize the electroluminescence effect of semiconductor materials to directly convert electrical energy into light energy.

[0094] For example, please refer to Figure 8 , Figure 8 This is a schematic diagram of the specific structure of a light-emitting detection lamp bead provided in one embodiment of this application. For example... Figure 8 As shown, Figure 8 (a) is a schematic diagram of the structure of a light-emitting chip including a set of light-emitting devices, and the set of light-emitting devices including multiple light-emitting devices of different colors; Figure 8 (b) is a schematic diagram of a light-emitting chip comprising multiple groups of light-emitting devices, each group including multiple light-emitting devices of different colors, for a light-emitting detection lamp bead. The different colored light-emitting devices may include red, green, and blue light-emitting devices.

[0095] In practical applications, when the touch signal light source is the display light source of the light-emitting chip 111, or when the touch signal light source is ambient light, the light-emitting detection lamp bead 11 can be as follows: Figure 8 The light-emitting detection lamp shown.

[0096] In another embodiment of this application, please refer to Figure 9 , Figure 9This is a schematic diagram of the structure of a light-emitting detection LED bead according to another embodiment of this application. In this embodiment, the light-emitting detection LED bead may further include a non-visible light-emitting chip. The non-visible light-emitting chip and the light-detecting chip 112 are located on the same side of the substrate inside the light-emitting detection LED bead 11.

[0097] Specifically, the non-visible light-emitting chip is configured to output non-visible light to provide a light source for touch signals.

[0098] The light detection chip 112 is also configured to receive non-visible light, and reflected light generated by the reflection of the touch object.

[0099] In this embodiment, the non-visible light emitting chip is connected to the control chip 30 in the display touch panel 1.

[0100] Correspondingly, when the control chip 30 detects that the display screen is in touch mode, it can send a target driving signal to the non-visible light emitting chip.

[0101] Subsequently, the non-visible light-emitting chip can output non-visible light based on the aforementioned target driving signal to provide a touch signal light source.

[0102] Then, the light detection chip 112 can receive non-visible light and the reflected light generated by the touch object.

[0103] In one embodiment of this application, when the touch signal light source is ambient light or non-visible light, the light-emitting detection lamp bead 11 further includes a light-shielding module to reduce the interference of the light output by the light-emitting chip 111 on the light detection chip 112.

[0104] The light-shielding module can be located between the light-emitting chip 111 and the light-detecting chip 112, or the light-shielding module can be located above the light-emitting chip and the light-detecting chip.

[0105] In some possible embodiments, the light-shielding module may include a light-shielding isolation structure, in which case the light-shielding module, i.e. the light-shielding isolation structure, may be located between the light-emitting chip 111 and the light-detecting chip 112.

[0106] In this embodiment, the light-shielding isolation structure is located between the light-emitting chip 111 and the light-detecting chip 112.

[0107] It should be noted that the light-shielding and isolation structure can reduce the impact of the light output by the light-emitting chip 111 on the touch signal light source, thereby improving the subsequent touch recognition accuracy.

[0108] In practical applications, light-blocking and isolation structures include, but are not limited to: black plastic-sealed isolation walls, metal light-blocking barriers, light-blocking rubber barriers, and deep trench isolation barriers.

[0109] The material for the black plastic-sealed partition wall can be black light-blocking epoxy resin.

[0110] The materials used for metal light-blocking barriers include, but are not limited to, aluminum, copper, stainless steel light-blocking sheets and metal grid light-blocking layers.

[0111] The materials used for sunshade barriers include, but are not limited to, black UV sunshade and black silicone sunshade.

[0112] The deep trench isolation barrier refers to etching deep trenches on the silicon substrate of the light-emitting detection lamp bead 11, and filling the trenches with a black light-blocking medium to separate the light-emitting chip 111 and the light-detecting chip 112.

[0113] For example, please refer to Figure 10 , Figure 10 This is a schematic diagram of the structure of a light-emitting detection lamp bead when the touch signal light source is ambient light, as provided in one embodiment of this application. Figure 10 As shown, the light-shielding module is a light-shielding and isolation structure.

[0114] In some other possible embodiments, the light-shielding module may also include a light-shielding layer, in which case the light-shielding module may be located above the light-emitting chip 111 and the light-detecting chip 112.

[0115] For example, please refer to Figure 11 , Figure 11 This is a schematic diagram of the structure of the light-shielding layer, the light-emitting chip, and the light-detecting chip when the touch signal light source is ambient light, as provided in an embodiment of this application.

[0116] In this embodiment, the light-shielding module being located above the light-emitting chip 111 and the light-detecting chip 112 specifically means that the light-shielding layer is located above the light-emitting detection area in the light-emitting detection lamp bead 11. The light-emitting detection area is composed of the area where the light-emitting chip 111 is located and the area where the light-detecting chip 112 is located.

[0117] It should be noted that the light-shielding layer has a first window directly above the light-emitting chip 111 and a second window directly above the light-detecting chip 112, so that the light-detecting chip 112 can receive reflected light based on the second window, thereby controlling the light receiving angle of each light detection area 21 and effectively reducing interference from light other than the touch signal light source.

[0118] For example, please refer to Figure 12 , Figure 12 This is a schematic diagram of the structure of a light-emitting detection lamp bead when the touch signal light source is non-visible light, as provided in one embodiment of this application. In this embodiment, the light-shielding module may include a light-shielding isolation structure and / or a light-shielding layer.

[0119] like Figure 12 As shown, Figure 12(a) is a schematic diagram of the structure of the light-emitting detection lamp bead, which includes a light-emitting chip, a light-detection chip, a non-visible light-emitting chip, and a light-shielding and isolation structure. Figure 12 (b) is a schematic diagram of the structure of the light-emitting detection lamp bead, which includes a light-emitting chip, a light-detecting chip, a non-visible light-emitting chip, a light-shielding isolation structure, and a light-shielding layer.

[0120] In practical applications, when the touch signal light source is non-visible light, the light-emitting detection LED can be as follows: Figure 9 Or such as Figure 12 The light-emitting detection lamp shown.

[0121] Please see Figure 13 , Figure 13 This is a flowchart illustrating the implementation of an LED chip detection method according to an embodiment of this application. In this embodiment, the entity executing the LED chip detection method can be as follows: Figure 1 The control chip shown is located in the touch panel.

[0122] It should be noted that the LED bead detection methods provided in all embodiments of this application can be applied to, for example, Figures 7-12 The light-emitting detection LED shown in any one of these examples can also be applied to other light-emitting detection LEDs that include both a light-emitting area and a light-detection area.

[0123] like Figure 13 As shown, an embodiment of this application provides a method for detecting LED beads that may include steps S101 to S104, which are described in detail below: In S101, the light-emitting device of any color among the light-emitting detection lamp beads is controlled to be in the lit state.

[0124] In this embodiment, when the control chip detects that the light-emitting detection lamp bead is in the lamp bead health detection stage, it can selectively control any one color of the light-emitting device in the light-emitting detection lamp bead to enter the working state alone, that is, to be lit up alone, while the light-emitting devices of other colors are kept off, so as to ensure that only a single color light source participates in the light emission during this detection process, avoid mutual interference of multiple color light sources, and ensure that the detection light source is single and controllable.

[0125] In S102, the current signal value output by the light detection chip in the light-emitting detection lamp bead is read.

[0126] In this embodiment of the application, after the light-emitting device emits light stably, the light detection chip integrated inside the light-emitting detection lamp bead can collect the light signal output by the light-emitting device in real time and output the current signal value corresponding to the light signal.

[0127] Therefore, the control chip can read the current signal value output by the light detection chip in the light-emitting detection lamp bead.

[0128] In S103, the current difference between the current signal value and the reference signal value is calculated.

[0129] In this embodiment, the control chip can calculate the current difference between the current signal value and the pre-stored reference signal value.

[0130] The reference signal value refers to the calibration value output by the photodetector chip when a light-emitting device of any color emits light in its factory-calibrated state.

[0131] In S104, the health detection result of the light-emitting detection lamp bead is determined based on the current difference.

[0132] In this embodiment, after obtaining the current difference, the control chip can determine the health detection result of the light-emitting detection lamp bead based on the current difference and the pre-stored normal error range.

[0133] The health test results include, but are not limited to, those of healthy individuals and those of abnormal individuals.

[0134] It should be noted that the normal error range can be determined according to actual needs, and no restrictions are imposed here.

[0135] In one embodiment of this application, when the control chip detects that the current difference is within the normal error range, it indicates that the light emission performance of the light emission detection lamp is normal, with no obvious light decay or fault. Therefore, the control chip can determine that the health detection result of the light emission detection lamp is healthy.

[0136] In another embodiment of this application, when the control chip detects that the current difference is not within the normal error range, it indicates that the light-emitting detection lamp bead has problems such as aging of the light-emitting chip, severe light decay, or damage. Therefore, the control chip can determine that the health detection result of the light-emitting detection lamp bead is abnormal.

[0137] As can be seen from the above, the LED bead detection method provided in this application involves controlling any color light-emitting device in the LED bead to be in an illuminated state; reading the current signal value output by the light detection chip in the LED bead; calculating the current difference between the current signal value and the reference signal value; the reference signal value refers to the calibration value output by the light detection chip when any color light-emitting device emits light in a calibrated state; and determining the health detection result of the LED bead based on the current difference. This application can monitor the luminous health status of each light-emitting device in real time, effectively improving the accuracy of LED bead fault detection and facilitating fault location and maintenance.

[0138] Please see Figure 14 , Figure 14 This is a flowchart illustrating the implementation of a lamp bead detection method according to another embodiment of this application. Figure 14 As shown, relative to Figure 13 In a corresponding embodiment, after step S103, this embodiment may further include steps S201 to S205, as detailed below: In S201, in response to the current difference being greater than the set difference, the drive signal of the light-emitting device of any color is adjusted.

[0139] In this embodiment, in order to achieve self-calibration of the light-emitting device, after obtaining the current difference value corresponding to the light-emitting device of any color, the control chip can compare the current difference value with the preset set difference value. When it is detected that the current difference value is greater than the set difference value, it indicates that the actual light intensity of the light-emitting device of that color deviates from the standard state, and there may be light decay or brightness deviation problems. Therefore, the control chip can perform a drive signal adjustment operation, that is, adjust the drive signal of the light-emitting device of that color.

[0140] The set difference can be determined according to actual needs, and there are no restrictions here.

[0141] In some possible embodiments, adjusting the driving signal of the light-emitting device of the color may include adjusting the driving current of the driving signal.

[0142] In some other possible embodiments, adjusting the driving signal of the light-emitting device of the color may include adjusting the pulse width modulation (PWM) duty cycle of the driving signal.

[0143] In S202, a light-emitting device of any color is controlled to output light under an adjusted driving signal.

[0144] In this embodiment, after the adjustment is completed, the control chip can output the adjusted driving signal to the light-emitting device of the above color, and control the light-emitting device of the color to stably output light based on the adjusted driving signal.

[0145] In S203, the target signal value output by the light detection chip is read.

[0146] In S204, the target difference between the target signal value and the reference signal value is calculated.

[0147] In this embodiment, after the output of the light-emitting device of the above color stabilizes, the control chip can read the target signal value output by the light detection chip in the light-emitting detection lamp bead.

[0148] Then, the control chip can calculate the target difference between the target signal value and the reference signal value.

[0149] In this embodiment, after obtaining the target difference, the control chip can continue to compare the target difference with the set difference.

[0150] In one embodiment of this application, when the control chip detects that the target difference is greater than the set difference, it can execute step S205.

[0151] In another embodiment of this application, when the control chip detects that the target difference is less than the set difference, it indicates that the drive adjustment of the light-emitting device of the above color is sufficient, that is, the actual light output intensity of the light-emitting device of the above color is in a standard state, and there is no problem of light decay or brightness deviation. Therefore, the control chip can stop the drive signal adjustment operation to end the self-calibration process of the light-emitting device of the above color.

[0152] In S205, in response to the target difference being greater than the set difference, the process returns to the step of adjusting the drive signal of the light-emitting device of any color and subsequent steps, until the latest target difference is less than the set difference.

[0153] In this embodiment, when the control chip detects that the target difference is greater than the set difference, it indicates that the actual light intensity of the light-emitting device of the above color is still deviating from the standard state. Therefore, the control chip can continue to execute steps S201 to S205 until the latest target difference is less than the set difference.

[0154] As can be seen from the above, the LED bead detection method provided in this embodiment adjusts the driving signal of any color light-emitting device in response to the current difference being greater than a set difference; controls the light-emitting device of any color to output light under the adjusted driving signal; reads the target signal value output by the photodetector chip; calculates the target difference between the target signal value and the reference signal value; and, in response to the target difference being greater than the set difference, returns to the step of adjusting the driving signal of any color light-emitting device and subsequent steps until the latest target difference is less than the set difference. In this embodiment, when the current difference exceeds the set difference, the driving signal of the corresponding light-emitting device is automatically iteratively adjusted, and the target signal value output by the photodetector chip is repeatedly collected and compared with the reference signal value until the difference reaches the target. This can compensate for brightness inconsistencies caused by differences in light-emitting devices, aging, and temperature changes. Simultaneously, this embodiment does not require manual disassembly for calibration; it relies on the LED's own photosensitive feedback to form a closed-loop adjustment, allowing the actual light output intensity to return to the factory calibration standard, thus improving the stability of the light received by the photodetector chip.

[0155] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0156] Figure 15 This is a schematic diagram of the structure of a control chip provided in one embodiment of this application. Figure 15 As shown, the control chip 30 in this embodiment includes: at least one processor 31 ( Figure 15 (Only one is shown in the diagram), memory 32, and computer program 33 stored in the memory 32 and executable on the at least one processor 31, wherein the processor 31 executes the computer program 33 to implement the steps in any of the above-described embodiments of the LED detection method.

[0157] The control chip 30 may include, but is not limited to, a processor 31 and a memory 32. Those skilled in the art will understand that... Figure 15 This is merely an example of the control chip 30 and does not constitute a limitation on the control chip 30. It may include more or fewer components than shown, or combine certain components, or different components, such as input / output devices, network access devices, etc.

[0158] The processor 31 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0159] In some embodiments, the memory 32 may be an internal storage unit of the control chip 30, such as the RAM of the control chip 30. In other embodiments, the memory 32 may be an external storage device of the control chip 30, such as a plug-in hard drive, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the control chip 30. Furthermore, the memory 32 may include both internal storage units and external storage devices of the control chip 30. The memory 32 is used to store the operating system, applications, boot loader, data, and other programs, such as the program code of the computer program. The memory 32 can also be used to temporarily store data that has been output or will be output.

[0160] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps described in the various method embodiments above.

[0161] This application provides a computer program product that, when run on a control chip, enables the control chip to execute the steps described in the above-described method embodiments.

[0162] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying computer program code to a control chip, a recording medium, a computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, such as a USB flash drive, a portable hard drive, a magnetic disk, or an optical disk.

[0163] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0164] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A display touch panel, characterized in that, The display touch panel includes a light-emitting detection array, a signal processing module, and a control chip. The light-emitting detection array includes a plurality of light-emitting detection LEDs, and each light-emitting detection LED includes a light-emitting chip and a light-emitting chip integrated on the same substrate. Each of the optical detection chips is configured to receive reflected light rays reflected by the touch object and generate a corresponding detection electrical signal based on the reflected light rays; The signal processing module is connected to several of the optical detection chips and is configured to perform signal processing on the detection electrical signal to obtain a digital signal set. The control chip is connected to the signal processing module and is configured to output touch coordinates based on the digital signal set in order to realize touch coordinate detection of the touch object.

2. The display touch panel according to claim 1, characterized in that, The reflected light is obtained by reflecting the light output from the light-emitting chip; correspondingly, The control chip is further configured to send a driving signal to the light-emitting chip when the display screen where the display touch panel is located is in touch mode; the driving signal includes an initial display driving signal and a touch bottom light driving signal, the initial display driving signal carries an initial grayscale value of the light-emitting chip in the touch mode, the touch bottom light driving signal carries a set grayscale value of the light-emitting chip in the touch mode, and the initial grayscale value is different from the set grayscale value; The light-emitting chip is also configured to output the light under the driving signal to provide a touch signal light source.

3. The display touch panel according to claim 1, characterized in that, The reflected light is obtained by reflecting ambient light, or the reflected light is obtained by reflecting non-visible light; correspondingly, The control chip is further configured to send an initial display driving signal to the light-emitting chip when the display screen where the display touch panel is located is in touch mode, the initial display driving signal carrying the initial grayscale value of the light-emitting chip in the touch mode; The light-emitting chip is also configured to either not output any light under the initial display driving signal, or to output only display light under the initial display driving signal.

4. The display touch panel according to claim 1, characterized in that, The light-emitting chip includes at least one set of light-emitting devices, and the set of light-emitting devices includes light-emitting devices of at least one color.

5. The display touch panel according to claim 1, characterized in that, The light-emitting detection LED bead also includes a non-visible light-emitting chip; the non-visible light-emitting chip and the light-detection chip are located on the same side of the same substrate; The non-visible light-emitting chip is configured to output non-visible light to provide a light source for touch signals; The light detection chip is also configured to receive the non-visible light and the reflected light generated by the reflection of the touch object.

6. The display touch panel according to claim 1, characterized in that, The signal processing module includes several signal conditioning circuits, each corresponding to one of several light-emitting detection LEDs. The signal conditioning circuits and the light-emitting chips and light-detecting chips in the corresponding light-emitting detection LEDs are integrated on the substrate of the corresponding light-emitting detection LEDs.

7. The display touch panel according to claim 6, characterized in that, The signal conditioning circuit and the optical detection chip are located on the same side of the same substrate; The signal conditioning circuit is connected to the optical detection chip and is configured to perform signal processing on the detection electrical signal to obtain the digital signal corresponding to the detection electrical signal.

8. The display touch panel according to any one of claims 1-7, characterized in that, The light-emitting detection LED also includes a light-shielding module, which is located between the light-emitting chip and the light-detecting chip, or above the light-emitting chip and the light-detecting chip, to reduce the interference of the light emitted by the light-emitting chip on the light-detecting chip.

9. A method for detecting LED beads, characterized in that, The method, which applies a light-emitting detection LED bead to a display touch panel as described in any one of claims 1-8, comprises: Control the light-emitting device of any color among the light-emitting detection lamp beads to be in the lit state; Read the current signal value output by the light detection chip in the light-emitting detection lamp bead; The current difference between the current signal value and the reference signal value is calculated; the reference signal value refers to the calibration value output by the light detection chip when the light-emitting device of any color emits light in the calibration state. Based on the current difference, the health detection result of the light-emitting detection lamp bead is determined.

10. The LED bead detection method according to claim 9, characterized in that, After calculating the difference between the current signal value and the reference signal value, the method further includes: In response to the current difference being greater than a set difference, the driving signal of the light-emitting device of any color is adjusted; The light-emitting device of any color is controlled to output light under the adjusted driving signal; Read the target signal value output by the optical detection chip; The target difference between the target signal value and the reference signal value is calculated. In response to the target difference being greater than the set difference, the process returns to the step of adjusting the driving signal of the light-emitting device of any color and subsequent steps, until the latest target difference is less than the set difference.

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