Display device and touch screen

Abstract

The invention provides a display device and a touch screen, the display device comprises a touch film, an identification circuit and a processing circuit, the touch film is provided with a plurality of identification pins, the plurality of identification pins are used for setting identifications of the touch film, and the plurality of identification pins of different types of touch films are different in connection mode and correspond to different identifications; the identification circuit is connected with the plurality of identification pins and is used for generating an identification signal based on the connection mode of the plurality of identification pins; and the processing circuit is connected with the identification circuit and the touch control film, and is used for storing configuration parameters of the multiple types of touch control films, confirming the target type of the touch control film based on the identification signal, and calling the configuration parameters of the touch control film of the target type to configure the touch control film. According to the invention, the touch screen can adapt to various types of touch films, so that the adaptability of the display equipment to the touch films can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to touch display technology, and more particularly to a display device and a touch screen. Background Art

[0002] With the continuous development of human-computer interaction needs, more and more touch films are being used in various display devices, such as mobile phones, tablet computers, televisions, etc.

[0003] In the related art, the configuration parameters of the touch film of the display device are pre-stored in the processor of the display device. When working, the processor calls the configuration parameters to configure the touch film to realize the collection of touch signals.

[0004] However, for different types of touch films, due to differences in process, materials and other factors, the parameters such as line resistance and parasitic capacitance of the touch films will be different. Therefore, different types of touch films need to be configured with different configuration parameters, so that one display device can only correspond to one type of touch film, and the display device has poor adaptability to the touch film. Summary of the invention

[0005] The embodiments of the present application provide a display device and a touch screen, aiming to solve the problem of poor adaptability of the display device to the touch film.

[0006] In a first aspect, an embodiment of the present application provides a display device, comprising: a touch screen, wherein the touch screen comprises: a touch film, an identification circuit and a processing circuit, wherein the

[0007] The touch film is provided with a plurality of identification pins, and the plurality of identification pins are used to set the identification of the touch film. The connection methods of the plurality of identification pins of different types of touch films are different, corresponding to different identifications; the identification circuit is connected to the plurality of identification pins, and is used to generate an identification signal based on the connection method of the plurality of identification pins; the processing circuit is connected to the identification circuit and the touch film, and is used to store configuration parameters of multiple types of touch films, and based on the identification signal, confirm the target type of the touch film, and call the configuration parameters of the touch film of the target type to configure the touch film.

[0008] In some embodiments, two identification pins among the multiple identification pins are connected, and two identification pins connected to each other in different types of touch films are not exactly the same; the identification circuit includes multiple resistance units and a first sampling unit; the multiple resistance units are connected in series, the first end of the resistance unit located in the first position receives the power supply input voltage, and the second end of the resistance unit located in the last position is grounded; the multiple resistance units correspond one by one to the multiple identification pins, and for each identification pin, the identification pin is connected to the first end of the corresponding resistance unit; the resistance values ​​of different resistance units are different; the first sampling unit is connected to the processing circuit and in parallel with any resistance unit, and is used to sample the voltage across the resistance unit connected in parallel with the first sampling unit, and output it to the processing circuit as the identification signal.

[0009] In some embodiments, the multiple identification pins include a first identification pin and a second identification pin, the first identification pin is grounded, and the second identification pin is vacant; the first identification pin and the second identification pin in different types of touch films are not exactly the same; the identification circuit includes a pull-up unit and a second sampling unit; the first end of the pull-up unit receives a power supply input voltage, and the second end of the pull-up unit is respectively connected to the multiple identification pins; the pull-up unit is used to pull up the level of the second identification pin; the second sampling unit is connected to the multiple identification pins and the processing circuit, and is used to sample the levels of the multiple identification pins and output them to the processing circuit as the identification signal.

[0010] In some embodiments, the pull-up unit includes multiple second resistors, and the multiple second resistors correspond one-to-one to the multiple identification pins; for each second resistor, the first end of the second resistor receives the power supply input voltage, and the second end of the second resistor is connected to the corresponding identification pin; the second sampling unit includes multiple sub-sampling units, and the multiple sub-sampling units correspond one-to-one to the multiple identification pins; for each sub-sampling unit, the first end of the sub-sampling unit is connected to the corresponding identification pin, the second end of the sub-sampling unit is connected to the processing circuit, and the sub-sampling unit is used to sample the level of the corresponding identification pin.

[0011] In some embodiments, the pull-up unit includes a second resistor and a selection unit; the first end of the second resistor receives the power supply input voltage, and the second end of the second resistor is connected to the first end of the selection unit; the first end of the selection unit is connected to the second sampling unit, and the second end of the selection unit is connected to each identification pin in a time-sharing manner; the selection unit is used to transmit the level of the identification pin connected to the selection unit to the second sampling unit.

[0012] In some embodiments, the first sampling unit is connected to the first end of the resistor unit located at the last position.

[0013] In some embodiments, the resistance of the resistor unit is a first number times the resistance of a previous resistor unit connected in series with the resistor unit, and the first number is not 1.

[0014] In some embodiments, the resistor unit includes a first resistor.

[0015] In some embodiments, the first sampling unit includes a first capacitor, a first end of the first capacitor is connected to a first end of a resistor unit connected in parallel with the first sampling unit, and a second end of the first capacitor is connected to a second end of the resistor unit connected in parallel with the first sampling unit.

[0016] In a second aspect, an embodiment of the present application provides a touch screen, comprising: a touch film, an identification circuit and a processing circuit, the touch film being provided with a plurality of identification pins, the plurality of identification pins being used to set an identification of the touch film, and the connection methods of the plurality of identification pins of different types of touch films being different, corresponding to different identifications; the identification circuit being connected to the plurality of identification pins, and being used to generate an identification signal based on the connection method of the plurality of identification pins; the processing circuit being connected to the identification circuit and the touch film, and being used to store configuration parameters of multiple types of touch films, and confirming a target type of the touch film based on the identification signal, and calling the configuration parameters of the touch film of the target type to configure the touch film.

[0017] In the display device and touch screen provided by the present application, the touch film is provided with a plurality of identification pins for setting the touch film, and the connection methods of the plurality of identification pins of different types of touch films are different. The identification circuit is connected to the plurality of identification pins and is used to generate an identification signal based on the connection method of the plurality of identification pins. The processing circuit is connected to the identification circuit and the touch film and is used to store the configuration parameters of the plurality of types of touch films, and based on the identification signal, confirm the target type of the touch film, and call the configuration parameters of the target type of touch film to configure the touch film. In this solution, the touch film is provided with a plurality of identification pins, and the identification circuit obtains the identification signal through the connection method of the plurality of identification pins, so that the processing circuit can determine the target type of touch film based on the identification signal, and then can call the configuration parameters of the target type from the configuration parameters of the plurality of types, so that the touch screen can adapt to a plurality of types of touch films, thereby improving the adaptability of the display device to the touch film. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0019] Figure 1 A schematic diagram showing the structure of a display device in an example;

[0020] Figure 2 This is a schematic diagram of the structure of a touch screen in an example;

[0021] Figure 3 A schematic diagram of the structure of a touch screen provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of another touch screen provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of a structure of an identification circuit in an example;

[0024] Figure 6 A structural schematic diagram of an identification circuit in another example;

[0025] Figure 7 A schematic diagram of the structure of another touch screen provided in an embodiment of the present application;

[0026] Figure 8 A schematic diagram of the structure of another touch screen provided in an embodiment of the present application;

[0027] Fig. 9 A schematic diagram of the structure of another touch screen provided in an embodiment of the present application.

[0028] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0029] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0030] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0031] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0032] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] The following first describes the application scenarios and existing problems of the present application in conjunction with the accompanying drawings.

[0036] Figure 1 A schematic diagram showing the structure of a display device in an example is shown in FIG. Figure 1As shown, the display device includes a touch screen 1, a backlight assembly 2, a main board 3, a power board 4, a rear shell 5 and a base 6. Among them, the touch screen 1 is used to present images to users and realize touch interaction; the backlight assembly 2 is located below the display panel 1, which is usually some optical components, used to supply sufficient brightness and uniformly distributed light sources so that the display panel 1 can display images normally. The backlight assembly 2 also includes a back plate 20, and the main board 3 and the power board 4 are arranged on the back plate 20. Usually, some convex structures are stamped on the back plate 20, and the main board 3 and the power board 4 are fixed on the convex structures by screws or hooks; the rear shell 5 is covered on the panel 1 to hide the components of the display device such as the backlight assembly 2, the main board 3 and the power board 4, so as to achieve an aesthetic effect; the base 6 is used to support the display device.

[0037] Figure 1 This is only an example of a display device. In addition to the above examples, the display device can also be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a camera, a smart watch, a smart TV, a smart interactive tablet, and other display devices. It should be understood that the present application does not limit the way in which a user touches a display device. For example, a user can interact with the touch screen by touching it with a finger or a stylus.

[0038] Figure 2 FIG. 1 is a schematic diagram of the structure of a touch screen in an example. Figure 2 As shown, the touch screen 1 may include a touch panel 40 (touch panel, TP), a touch film 10 and a display screen 20. Among them, the touch film 10 may include a touch sensing drive circuit 11. The touch panel 40 (touch) may include a processor 30. When a user touches the above touch film 10, the processor 30 may obtain information related to the touch position through the touch sensing drive circuit 11, and determine the position touched by the user based on the information related to the touch position. Then the processor may respond to the operation corresponding to the touch position. Through the above process, touch interaction can be achieved.

[0039] In some embodiments, the display screen is used to display an image. Exemplarily, the display screen may include a display panel. The display panel may be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), Miniled, MicroLed, Micro-oLed, a quantum dot light emitting diode (QLED), etc. In some embodiments, the touch screen may include one or more display screens.

[0040] In some embodiments, the processor can be implemented in at least one hardware form of digital signal processing (DSP), field programmable gate array (FPGA), and programmable logic array (PLA). The processing component can integrate a central processing unit (CPU), a graphics processing unit (GPU), a microcontroller unit (MCU), and a modem, etc. One or a combination of several. Among them, the CPU can process the operating system, user interface, and application programs, etc. The GPU can be used to render and draw the content that needs to be displayed on the display screen. The modem can be used to process wireless communications. It is understandable that the above-mentioned modem may not be integrated into the processing component, but may be implemented separately through a chip.

[0041] In some embodiments, the touch film may be a projected capacitive screen, which may include two transparent films and a touch sensing drive circuit composed of metal wires crisscrossing the X and Y axes sandwiched between the two films. The touch sensing drive circuit can sense the touch of a human hand. The touch signal is transmitted to a processor connected to the touch film, and the processor calculates the position of the touch to form an effective touch response, thereby achieving the effect of replacing a mouse or even exceeding a mouse (multi-point). The metal wire may be a flexible printed circuit (FPC for short).

[0042] In some embodiments, the touch sensing driving circuit may be implemented by an integrated circuit (IC) chip, for example.

[0043] In some embodiments, the touch panel may include a driving electrode layer and a sensing electrode layer.

[0044] It should be understood that the above Figure 1 The structure of the touch screen related to the present application is merely exemplified, and the present application does not limit whether the touch screen includes other structures. Figure 2 The components related to the present application in the touch panel are merely exemplified, and the present application does not limit whether the touch panel further includes other components.

[0045] In a display device of the related art, configuration parameters of the touch film of the display device are pre-stored in a processing circuit (processor). When working, the processing circuit calls the configuration parameters to configure the touch film to realize the collection of touch signals.

[0046] However, for different types of touch films, due to differences in process, materials and other factors, the parameters such as line resistance and parasitic capacitance of the touch films will be different. Therefore, different types of touch films need to be configured with different configuration parameters, so that one display device can only correspond to one type of touch film, and the display device has poor adaptability to the touch film.

[0047] Therefore, the present application provides a display device and a touch screen, in which a touch film is provided with multiple identification pins, and an identification circuit obtains an identification signal through the connection method of the multiple identification pins, so that the processing circuit can determine the target type of the touch film based on the identification signal, and then can call the configuration parameters of the target type from multiple types of configuration parameters, so that the touch screen can adapt to multiple types of touch films, thereby improving the adaptability of the display device to the touch film.

[0048] The technical solutions of the present application and the technical solutions of the present application are described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. In the description of the present application, unless otherwise clearly specified and limited, each term should be understood in a broad sense in the art. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0049] The display device provided in this application includes: a touch screen 1, Figure 3 A schematic diagram of the structure of a touch screen provided in an embodiment of the present application is shown in FIG. Figure 3 FIG. 4 shows a part of the circuit of the touch screen, and other circuits not related to the present application are not shown, such as Figure 3As shown, the touch screen 1 includes: a touch film 10, an identification circuit 50 and a processing circuit 30.

[0050] The touch film 10 is provided with a plurality of identification pins 11, and the plurality of identification pins 11 are used to set the identification of the touch film 10. The connection modes of the plurality of identification pins 11 of different types of touch films 10 are different, corresponding to different identifications;

[0051] The identification circuit 50 is connected to the plurality of identification pins 11 and is used to generate an identification signal based on the connection mode of the plurality of identification pins 11;

[0052] The processing circuit 30 is connected to the identification circuit 50 and the touch film 10, and is used to store configuration parameters of multiple types of touch films 10, and based on the identification signal, confirm the target type of the touch film 10, and call the configuration parameters of the touch film 10 of the target type to configure the touch film 10.

[0053] In this embodiment, the touch film 10 is provided with a plurality of identification pins 11 , which may be spare pins for connecting FPC lines to form a grid matrix layer, or may be specially provided pins for setting identification, which is not limited in this embodiment.

[0054] The connection modes of the identification pins 11 of different types of touch films 10 are different. For example, any two pins are selected from the multiple identification pins 11 to be connected to each other. The two pins connected to each other in different types of touch films 10 are not completely the same, so as to distinguish different connection modes. The identification circuit 50 generates different identification signals based on the different connection modes of the identification pins 11, wherein the identification signal may include one or more signals. As an example, the identification signal may include a voltage signal. The voltage values ​​of the identification signals of different touch films 10 are different, and the processing circuit 30 may determine the target type of the touch film 10 based on the corresponding voltage values. As another example, the identification signal may be a plurality of level signals, each level signal is the level of the corresponding identification pin 11, and the combination of high and low level signals of the plurality of identification pins 11 in different touch films 10 is different. The processing circuit 30 determines the target type of the touch film 10 based on the level of each identification pin 11.

[0055] Continue to refer to Figure 3 , the identification circuit 50 outputs a corresponding identification signal to the processing circuit 30. The exemplary processing circuit 30 may be a microcontroller unit (MCU) or other chip with processing capability. The processing circuit 30 pre-stores configuration parameters of various types of touch films 10, and the configuration parameters correspond to the identification signal. Therefore, based on the identification signal, the configuration parameters of the target type may be called. The identification circuit 50 and the processing circuit 30 may be integrated on the touch panel 40.

[0056] The following will be explained in combination with actual scenarios: the identification circuit 50 stores configuration parameters of five types of touch films, and the connection methods of the identification pins 11 of these five touch films are all different. The identification circuit 50 is connected to the identification pin 11 of the touch film 10. The identification circuit 50 can generate a corresponding identification signal based on the current connection method of the identification pin 11 of the touch film 10. The processing circuit 30 confirms the target type of the touch film 10 based on the identification signal, thereby calling the configuration parameters of the touch film 10 of the target type. It can be seen that the touch screen in this scenario can adapt to five types of touch films 10. Therefore, compared with the related technology, the adaptability of the touch screen to the touch film 10 can be improved, thereby improving the adaptability of the display device to the touch film 10.

[0057] The identification circuit 50 will be exemplarily introduced below in combination with different connection modes of the identification pin 11 .

[0058] As a way to achieve this, Figure 4 A schematic diagram of the structure of another touch screen provided in an embodiment of the present application, such as Figure 4 As shown, two identification pins 11 among the plurality of identification pins 11 are connected, and two identification pins 11 connected to each other in different types of touch films 10 are not completely the same;

[0059] The identification circuit 50 includes a plurality of resistor units 51 and a first sampling unit 52; the plurality of resistor units 51 are connected in series, the first end of the resistor unit 51 located at the first position receives the power supply input voltage VCC, and the second end of the resistor unit 51 located at the last position is grounded; the plurality of resistor units 51 correspond to the plurality of identification pins 11 one by one, and for each identification pin 11, the identification pin 11 is connected to the first end of the corresponding resistor unit 51; the resistance values ​​of different resistor units 51 are different;

[0060] The first sampling unit 52 is connected to the processing circuit 30 and connected in parallel with any resistance unit 51 , and is used to sample the voltage across the resistance unit 51 connected in parallel with the first sampling unit 52 , and output it to the processing circuit 30 as an identification signal.

[0061] In this embodiment, the two identification pins 11 connected to each other in different types of touch films 10 are not completely the same. Figure 4 , the touch film 10 includes identification pins 1-5, the identification pin 1 in the first type of touch film is connected to the identification pin 3, and the identification pin 1 in the second type of touch film is connected to the identification pin 5. That is, at least one of the two identification pins connected to each other is different. It can be seen that the number of touch films that the touch screen can adapt to in this embodiment is:

[0062]

[0063] Wherein N is the number of identification pins 11.

[0064] The identification circuit 50 includes a plurality of resistor units 51 with different resistance values. The plurality of resistor units 51 are connected in series, wherein each resistor unit 51 corresponds to an identification pin 11 , and a first end of each resistor unit 51 is connected to the corresponding identification pin 11 . Figure 5 This is a schematic diagram of the structure of an identification circuit in an example. Figure 5 As shown, the resistance unit 51 may include a first resistor, and the first resistors of the first resistance unit to the fifth resistance unit are R1-R5 respectively.

[0065] An example explanation is given in combination with actual scenarios: Figure 4 , Figure 5 As shown, the identification circuit 50 includes 5 resistor units, which are connected in series, wherein the first end of the first resistor unit at the beginning receives the power supply input voltage VCC, and the second end of the fifth resistor unit at the end is grounded. The first end of each resistor unit 51 is connected to a corresponding identification pin 11 (such as Figure 5 shown); in addition, Figure 6 FIG. 1 is a structural diagram of an identification circuit in another example. Figure 6 As shown, the second ends of the first resistor R1 of the first resistor unit to the first resistor R5 of the fifth resistor unit can also be connected to the corresponding identification pin 11. Taking the first end connected to each resistor unit 51 as an example, the first ends of the first resistor unit to the fifth resistor unit are respectively connected to the identification pins 11 No. 1-5, wherein the resistance values ​​of different resistor units are different. In this embodiment, the resistor unit 51 between the two identification pins 11 connected to each other is short-circuited. It can be seen that when different identification pins 11 are connected, the current flowing through each resistor unit 51 connected in series is different, so the voltage at both ends of the same resistor unit 51 is different. The first sampling unit 52 can be connected in parallel with any one of the multiple resistor units 51 to collect the voltage at both ends of the resistor unit 51 connected in parallel therewith, and the collected voltage is the identification signal. Therefore, this embodiment can identify different identification signals based on the connection mode of multiple identification pins 11, so that the processing circuit 30 determines the target type of the touch film 10 based on the identification mark.

[0066] In one example, the resistance of the resistor unit 51 is a first number times the resistance of the previous resistor unit 51 connected in series therewith, and the first number is not 1. Figure 4, the first number can be 2, then the resistance values ​​of the first to fifth resistor units are 1, 2, 4, 8, 16 in sequence; of course, the first number can also be 1 / 2, then the resistance values ​​of the first to fifth resistor units are 16, 86, 46, 26, 16 in sequence. In this example, the resistance values ​​of adjacent resistor units change with the same multiple, so that the change of the identification signal also becomes a fixed multiple, thereby improving the processing efficiency of the processing circuit, thereby quickly determining the type of the touch film.

[0067] In one example, if Figure 4 , Figure 5 As shown, the first sampling unit 52 is connected to the first end of the resistor unit 51 located at the end. Figure 4 , Figure 5 , the first sampling unit 52 is connected to the first end of the fifth resistor unit, and the second end of the fifth resistor unit is grounded. When the first sampling unit 52 is connected in parallel with the fifth resistor unit, since the second end of the fifth resistor unit is grounded, the first sampling unit 52 only needs to be connected to the first end of the fifth single-group unit. It can be seen that this solution can reduce the number of FPC connection lines used.

[0068] In some examples, the first sampling unit 52 may include a connection line, and the sampled voltage is directly transmitted to the processing circuit 30 based on the connection line. Figure 5 As shown, the processing circuit 30 is a digital processing chip, and the first sampling unit 52 may further include an analog to digital conversion circuit 521 (Analog to Digital Converter, ADC for short).

[0069] In some examples, Figure 5 As shown, the first sampling unit 52 includes a first capacitor C1, a first end of the first capacitor C1 is connected to a first end of a resistor unit 51 connected in parallel with the first sampling unit 52, and a second end of the first capacitor C1 is connected to a second end of the resistor unit 51 connected in parallel with the first sampling unit 52. In this example, the first capacitor C1 is a filter capacitor, which is used to filter out interference signals to improve the accuracy of the sampled identification signal.

[0070] The following is an exemplary introduction to this implementation mode in combination with actual scenarios: Figure 5 As shown, the first sampling unit 52 is connected to the first resistor R5 of the fifth resistor unit, and the resistances of the first resistor R1 of the first resistor unit to the first resistor R5 of the fifth resistor unit are 1Ω, 2Ω, 4Ω, 8Ω, and 16Ω, respectively. The power supply input voltage VCC is 12V; for the first type of touch film 10, the touch film 10 has 5 identification pins 11, namely No. 1 to No. 5, wherein the No. 1 identification pin is connected to the No. 4 identification pin (such as Figure 5), then R1 in the first resistor unit to the first resistor R3 in the third resistor unit are short-circuited, so the identification signal collected by the first sampling unit 52 is 8V. For the second type of touch film 10, the No. 2 identification pin 11 and the No. 3 identification pin 11 (such as Figure 4 As shown), the first resistor R2 of the second resistor R6 unit is short-circuited, and the identification signal sampled by the first sampling resistor is 6.6 V. The processing circuit 30 stores the configuration parameters of the voltage value and type of the identification signal, so the processing circuit 30 can call the corresponding configuration parameters based on the identification signal.

[0071] In this embodiment, two identification pins among the multiple identification pins are connected, and the resistance unit between the two interconnected identification pins is short-circuited. It can be seen that when different identification pins are connected, the current flowing through each resistance unit in series is different, so the voltage across the same resistance unit is different. The first sampling unit can be connected in parallel with any one of the multiple resistance units to collect the voltage across the parallel resistance units, and the collected voltage is the identification signal. Therefore, this embodiment can identify different identification signals based on the connection method of multiple identification pins, so that the processing circuit can determine the target type of the touch film based on the identification mark.

[0072] As another implementation, Figure 7 A structural diagram of another touch screen provided in an embodiment of the present application is shown in FIG. Figure 7 As shown, the plurality of identification pins 11 include a first identification pin and a second identification pin, the first identification pin is grounded (GND), and the second identification pin is vacant; the first identification pin and the second identification pin in different types of touch films 10 are not completely the same;

[0073] The identification circuit 50 includes a pull-up unit 53 and a second sampling unit 54; the first end of the pull-up unit 53 receives the power supply input voltage VCC, and the second end of the pull-up unit 53 is respectively connected to a plurality of identification pins 11; the pull-up unit 53 is used to pull up the level of the second identification pin;

[0074] The second sampling unit 54 is connected to the plurality of identification pins 11 and the processing circuit 30 , and is used for sampling the level of each identification pin 11 and outputting the level as an identification signal to the processing circuit 30 .

[0075] In this embodiment, each identification pin 11 can be grounded or vacant, wherein the grounded one is the first identification pin, and the vacant one is the second identification pin. Figure 7 As shown, the number 1 and number 3 identification pins are the first identification pins, and the number 2, number 4, and number 5 identification pins are the second identification pins. The number of connection modes of the identification pins 11, that is, the number of touch films 10 that the touch screen can adapt to is: 2 N, where N is the number of identification pins 11. Figure 7 The first end of the pull-up unit 53 receives the power supply input voltage VCC, and the second end of the pull-up unit 53 is connected to each identification pin 11, so that the level of the first identification pin is zero because it is grounded, and the second identification pin is in an idle state, and the level is a high level. The second sampling unit 54 samples the level of each identification pin 11, and the processing circuit 30 determines the target type of the touch screen based on the level combination of each pin.

[0076] Exemplarily, the second sampling unit 54 may include an ADC circuit 521. The second sampling unit 54 converts the sampled high and low levels into corresponding digital signals, for example, the high level is 1 and the low level is 0. Figure 7 Taking 1 as an example, the levels of the five identification pins 11 sampled by the second sampling unit 54 are 0, 1, 0, 1, 1 in sequence; for another example, if identification pins 11 No. 3, 4, and 5 are the first identification pins, and identification pins 11 No. 1 and 2 are the second identification pins, the levels sampled by the second sampling unit 54 are 1, 1, 0, 0, 0 in sequence.

[0077] In practical applications, the second sampling unit may sample the levels of the identification pins 11 in a variety of ways, which will be described below as examples.

[0078] In one example, Figure 8 A structural diagram of another touch screen provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, the pull-up unit 53 includes a plurality of second resistors R6, and the plurality of second resistors R6 correspond one-to-one to the plurality of identification pins 11;

[0079] For each second resistor R6 , a first end of the second resistor R6 receives a power supply input voltage VCC, and a second end of the second resistor R6 is connected to a corresponding identification pin 11 ;

[0080] The second sampling unit 54 includes multiple sub-sampling units 541, and the multiple sub-sampling units 541 correspond one-to-one to the multiple identification pins 11; for each sub-sampling unit 541, the first end of the sub-sampling unit 541 is connected to the corresponding identification pin 11, and the second end of the sub-sampling unit 541 is connected to the processing circuit 30, and the sub-sampling unit 541 is used to sample the level of the corresponding identification pin 11.

[0081] In this example, the pull-up unit 53 includes a plurality of second resistors R6 , each second resistor R6 corresponds to an identification pin 11 , wherein the second resistors R6 may be resistors with the same resistance value or resistors with different resistance values, which is not limited in this example.

[0082] Continue to refer to Figure 8, the first end of each sub-sampling unit 541 is connected to the corresponding identification pin 11, and the second end is connected to the processing circuit 30, and each sub-sampling unit 541 samples the level of the corresponding identification pin 11. For example, the second sampling unit 54 includes 5 sub-sampling units, wherein the first sub-sampling unit to the fifth sub-sampling unit correspond to the identification pins 11 No. 1 to No. 5, respectively. In this way, each sub-sampling unit can sample the level of the corresponding identification pin 11 at the same time, thereby improving the sampling efficiency of the second sampling unit 54.

[0083] In another example, Fig. 9 A structural diagram of another touch screen provided in an embodiment of the present application is shown in FIG. Fig. 9 As shown, the pull-up unit 53 includes a second resistor R6 and a selection unit 531; the first end of the second resistor R6 receives the power supply input voltage VCC, and the second end of the second resistor R6 is connected to the first end of the selection unit 531;

[0084] The first end of the selection unit 531 is connected to the second sampling unit 54 , and the second end of the selection unit 531 is connected to each identification pin 11 in a time-sharing manner; the selection unit 531 is used to transmit the level of the identification pin 11 connected to the selection unit 531 to the second sampling unit 54 .

[0085] In this example, the pull-up unit 53 includes a selection unit 531 and a second resistor R6, wherein the second resistor R6 is a pull-up resistor, a first end of the second resistor R6 receives a power supply input voltage VCC, and a second end of the second resistor R6 is connected to each identification pin 11 through the selection unit, wherein the selection unit 531 can be a single-pole multi-throw switch. The second resistor R6 is connected to each identification pin 11 in a time-sharing manner, and the second sampling unit 54 is connected to the selection circuit for time-sharing sampling of the level of the identification pin 11 connected to the second resistor R6.

[0086] For example, continuing to refer to 9, the selection unit 531 is connected to the No. 1 to No. 5 identification pins 11 in sequence, and the conduction time with each identification pin 11 is set according to the sampling time of the second sampling unit 54. The second sampling unit 54 samples the level of the identification pin 11 connected to the selection unit 531. For example, when sampling, the selection unit 531 is first connected to the No. 1 identification pin 11, then the second sampling unit 54 samples the level 0 of the No. 1 identification pin 11, and then samples the levels of the No. 2-5 identification pins 11 in sequence.

[0087] Compared with the above-mentioned example including a plurality of sub-sampling units, this example can reduce and simplify the structure of the sampling unit, thereby reducing the volume of the touch screen.

[0088] In the display device provided in this embodiment, the touch film is provided with a plurality of identification pins for setting the touch film, and the connection methods of the plurality of identification pins of different types of touch films are different. The identification circuit is connected to the plurality of identification pins and is used to generate an identification signal based on the connection method of the plurality of identification pins. The processing circuit is connected to the identification circuit and the touch film and is used to store the configuration parameters of the plurality of types of touch films, and based on the identification signal, confirm the target type of the touch film, and call the configuration parameters of the target type of touch film to configure the touch film. In this solution, the touch film is provided with a plurality of identification pins, and the identification circuit obtains the identification signal through the connection method of the plurality of identification pins, so that the processing circuit can determine the target type of touch film based on the identification signal, and then can call the configuration parameters of the target type from the configuration parameters of the plurality of types, so that the touch screen can adapt to a plurality of types of touch films, thereby improving the adaptability of the display device to the touch film.

[0089] In some other embodiments, the present application further provides a touch screen including: a touch film, an identification circuit and a processing circuit,

[0090] The touch film is provided with a plurality of identification pins, and the plurality of identification pins are used to set the identification of the touch film. The connection methods of the plurality of identification pins of different types of touch films are different, corresponding to different identifications;

[0091] An identification circuit connected to the plurality of identification pins and configured to generate an identification signal based on a connection mode of the plurality of identification pins;

[0092] The processing circuit is connected to the identification circuit and the touch film, and is used to store configuration parameters of multiple types of touch films, and based on the identification signal, confirm the target type of the touch film, and call the configuration parameters of the touch film of the target type to configure the touch film.

[0093] The touch screen in this embodiment can be applied to the display device in any of the above embodiments. For the specific structure and principle, please refer to the display device in any of the above embodiments, which will not be described in detail here.

[0094] In the touch screen provided in this embodiment, the touch film is provided with a plurality of identification pins for setting the touch film, and the connection methods of the plurality of identification pins of different types of touch films are different. The identification circuit is connected to the plurality of identification pins and is used to generate an identification signal based on the connection method of the plurality of identification pins. The processing circuit is connected to the identification circuit and the touch film and is used to store the configuration parameters of the plurality of types of touch films, and based on the identification signal, confirm the target type of the touch film and call the configuration parameters of the target type of touch film to configure the touch film. In this solution, the touch film is provided with a plurality of identification pins, and the identification circuit obtains the identification signal through the connection method of the plurality of identification pins, so that the processing circuit can determine the target type of touch film based on the identification signal, and then can call the configuration parameters of the target type from the plurality of types of configuration parameters, so that the touch screen can adapt to a plurality of types of touch films, thereby improving the adaptability of the display device to the touch film. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0095] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that: include: A touch screen, the touch screen comprising: a touch film, an identification circuit and a processing circuit, The touch film is provided with a plurality of identification pins, and the plurality of identification pins are used to set the identification of the touch film. The connection modes of the plurality of identification pins of different types of touch films are different, and correspond to different identifications; The identification circuit is connected to the plurality of identification pins and is used to generate an identification signal based on the connection mode of the plurality of identification pins; The processing circuit is connected to the recognition circuit and the touch film, and is used to store configuration parameters of multiple types of touch films, and based on the recognition signal, confirm the target type of the touch film, and call the configuration parameters of the touch film of the target type to configure the touch film.

2. The display device according to claim 1, characterized in that Two identification pins among the plurality of identification pins are connected, and two identification pins connected to each other in different types of touch films are not completely the same; The identification circuit comprises a plurality of resistor units and a first sampling unit; the plurality of resistor units are connected in series, the first end of the resistor unit at the first position receives the power supply input voltage, and the second end of the resistor unit at the last position is grounded; the plurality of resistor units correspond to the plurality of identification pins one by one, and for each identification pin, the identification pin is connected to the first end of the corresponding resistor unit; the resistance values ​​of different resistor units are different; The first sampling unit is connected to the processing circuit and connected in parallel with any resistance unit, and is used to sample the voltage across the resistance unit connected in parallel with the first sampling unit, and output it to the processing circuit as the identification signal.

3. The display device according to claim 1, characterized in that The plurality of identification pins include a first identification pin and a second identification pin, the first identification pin is grounded, and the second identification pin is vacant; the first identification pin and the second identification pin in different types of touch films are not completely the same; The identification circuit includes a pull-up unit and a second sampling unit; the first end of the pull-up unit receives a power supply input voltage, and the second end of the pull-up unit is respectively connected to the plurality of identification pins; the pull-up unit is used to pull up the level of the second identification pin; The second sampling unit is connected to the plurality of identification pins and the processing circuit, and is used for sampling the levels of the plurality of identification pins and outputting the levels as the identification signals to the processing circuit.

4. The display device according to claim 3, characterized in that The pull-up unit includes a plurality of second resistors, and the plurality of second resistors correspond one-to-one to the plurality of identification pins; For each second resistor, a first end of the second resistor receives the power supply input voltage, and a second end of the second resistor is connected to a corresponding identification pin; The second sampling unit includes multiple sub-sampling units, and the multiple sub-sampling units correspond one-to-one to the multiple identification pins; for each sub-sampling unit, a first end of the sub-sampling unit is connected to the corresponding identification pin, and a second end of the sub-sampling unit is connected to the processing circuit, and the sub-sampling unit is used to sample the level of the corresponding identification pin.

5. The display device according to claim 3, characterized in that The pull-up unit includes a second resistor and a selection unit; the first end of the second resistor receives the power supply input voltage, and the second end of the second resistor is connected to the first end of the selection unit; The first end of the selection unit is connected to the second sampling unit, and the second end of the selection unit is connected to each identification pin in a time-sharing manner; the selection unit is used to transmit the level of the identification pin connected to the selection unit to the second sampling unit.

6. The display device according to claim 2, characterized in that The first sampling unit is connected to the first end of the resistor unit located at the last position.

7. The display device according to claim 2, characterized in that The resistance value of the resistor unit is a first number times the resistance value of a previous resistor unit connected in series therewith, and the first number is not 1.

8. The display device according to claim 2, characterized in that The resistor unit includes a first resistor.

9. The display device according to claim 2, characterized in that: The first sampling unit includes a first capacitor, a first end of the first capacitor is connected to a first end of a resistor unit connected in parallel with the first sampling unit, and a second end of the first capacitor is connected to a second end of the resistor unit connected in parallel with the first sampling unit.

10. A touch screen, characterized in that: The touch screen includes: a touch film, an identification circuit and a processing circuit. The touch film is provided with a plurality of identification pins, and the plurality of identification pins are used to set the identification of the touch film. The connection modes of the plurality of identification pins of different types of touch films are different, and correspond to different identifications; The identification circuit is connected to the plurality of identification pins and is used to generate an identification signal based on the connection mode of the plurality of identification pins; The processing circuit is connected to the recognition circuit and the touch film, and is used to store configuration parameters of multiple types of touch films, and based on the recognition signal, confirm the target type of the touch film, and call the configuration parameters of the touch film of the target type to configure the touch film.

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