Anti-static touch screen based on In-Cell architecture

Abstract

The utility model discloses an anti-static touch screen based on In-Cell architecture, which comprises a main control unit, a FLASH unit, a display touch control driving unit and a TFT (thin film transistor) unit, the FLASH unit is used for storing driving firmware, the main control unit is directly coupled with the display touch control driving unit, the FLASH unit is directly coupled with the display touch control driving unit, and the TFT unit is used for storing driving firmware. The display touch control driving unit is directly coupled with the TFT unit, and a TVS (Transient Voltage Suppressor) unit is arranged between the FLASH unit and the display touch control driving unit. Due to the fact that all IO ports of the FLASH unit are provided with the TVS tubes, the anti-static performance of the IO ports is greatly improved, and the stability of the anti-static touch screen based on the In-Cell framework is effectively improved. As the TVS tube occupies a small space, an original circuit does not need to be greatly changed, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to a touch screen, more specifically, to an antistatic touch screen based on an In-Cell architecture. Background Art

[0002] Generally speaking, touch screens can be divided into three categories according to the location of the sensor: In-Cell, On-Cell and Out-Cell. Cell refers to two glass substrates and the part sandwiched in between. In-Cell touch screen is a special touch screen, where the sensor is inside the cell. Due to its excellent display effect, it is widely used in the field of smart watches. However, this In-Cell touch screen has a disadvantage, that is, the Flash pin IO port is easily damaged by external static electricity, which makes the entire smart watch scrapped.

[0003] Chinese invention patent document CN105468197A discloses an In-cell touch display screen, comprising a protective panel and a touch display module; characterized in that it also comprises a pressure sensing functional sheet; the pressure sensing functional sheet is bonded between the protective panel and the touch display module through an OCA adhesive layer; the pressure sensing functional sheet comprises a base layer and a pressure sensing electrode formed on the base layer. The base layer on the pressure sensing functional sheet is PET or transparent glass; the pressure sensing electrode on the base layer is an ITO electrode or a nanosilver electrode. A plurality of pressure sensing electrodes are distributed in an array on the base layer, and the pressure sensing electrodes are connected to the pressure sensing FPC through silver paste lines. The touch display module comprises an LCD display module and a touch module integrated inside the LCD display module; wherein the LCD display module comprises a backlight module and a liquid crystal panel mounted on the backlight module; the liquid crystal panel comprises, from bottom to top, a lower polarizer, a glass substrate, a liquid crystal layer, a color filter and an upper polarizer; the touch module is integrated on the liquid crystal layer. The touch module includes a lower line ITO layer and an upper line ITO layer, wherein the lower line ITO layer is bonded to the upper surface of the glass substrate, and the upper line ITO layer is bonded to the lower surface of the color filter. Transparent electrode patterns are provided on the lower line ITO layer and the upper line ITO layer; the transparent electrode pattern is electrically connected to a touch FPC through a silver paste line. The pressure sensing FPC and the touch FPC are an integrated structure. The thickness of the pressure sensing functional sheet is 20 to 125 um. The pressure sensing electrode is a pattern of a diamond, rectangle or any other shape. Obviously, the patent directly bonds the pressure sensing functional sheet between the protective panel and the touch display module through the OCA adhesive layer, and adds a pressure sensing function to the portable electronic products of the existing In-cell touch display module, thereby increasing the competitiveness of the product. However, this structure cannot solve the static electricity problem of the existing Flash pins.

[0004] Chinese invention patent document CN104461133A discloses an in-cell touch panel, comprising a driving layer, a liquid crystal layer and a sensing layer stacked in sequence, and a touch unit and an LCD driving unit connected to each other, wherein the driving layer has a driving line, and the sensing layer has a sensing line connected to the touch unit, characterized in that the driving layer includes at least two scanning areas, and the touch unit is used to send at least two driving signals of different frequencies to scan the corresponding scanning areas on the driving layer. The driving line is connected to the LCD driving unit, and the touch unit is used to send at least two driving signals of different frequencies to the LCD driving unit, and the LCD driving unit is used to amplify and process the driving signals of different frequencies and output them to the driving lines of the corresponding scanning areas on the driving layer. The driving line is connected to the touch unit, and the touch unit is used to directly output at least two driving signals of different frequencies to the driving lines of the corresponding scanning areas on the driving layer. The touch unit includes at least two frequency demodulation modules, and the touch unit is also used to: detect touch signals, and demodulate the touch signals using corresponding frequency demodulation modules. The LCD driving unit is used to send a scanning timing signal and a scanning start timing signal to the touch control unit; the touch control unit is used to send a driving signal to scan in the time slot when the scanning timing signal is at the first level; the LCD driving unit is also used to display the scanning result in the time slot when the scanning timing signal is at the second level. This patent defines at least two scanning areas on the driving layer, and the touch control unit sends at least two driving signals of different frequencies, so that two or more different scanning areas can be scanned simultaneously by two or more driving signals of different frequencies. However, this structure cannot solve the static electricity problem of the existing Flash pins. Utility Model Content

[0005] Based on this, it is necessary to provide an anti-static touch screen based on the In-Cell architecture to address the above technical issues. The anti-static touch screen based on the In-Cell architecture includes a main control unit, a FLASH unit for storing driving firmware, a display touch driving unit, and a TFT unit. The main control unit is directly coupled to the display touch driving unit, the FLASH unit is directly coupled to the display touch driving unit, the display touch driving unit is directly coupled to the TFT unit, and a TVS unit is provided between the FLASH unit and the display touch driving unit. Since TVS tubes are provided on all IO ports of the FLASH unit, the anti-static performance of the IO ports is greatly improved, thereby effectively improving the stability of the anti-static touch screen based on the In-Cell architecture. Since the space occupied by the TVS tube is very small, there is no need to make major changes to the original circuit, and the manufacturing cost is low.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An anti-static touch screen based on an In-Cell architecture is characterized in that the anti-static touch screen based on the In-Cell architecture comprises a main control unit, a FLASH unit for storing driving firmware, a display touch driving unit and a TFT unit, the main control unit is directly coupled to the display touch driving unit, the FLASH unit is directly coupled to the display touch driving unit, the display touch driving unit is directly coupled to the TFT unit, and a TVS unit is provided between the FLASH unit and the display touch driving unit.

[0008] As a preferred implementation of the antistatic touch screen based on the In-Cell architecture provided by the utility model, the TVS unit includes a first TVS tube, a second TVS tube, a third TVS tube and a fourth TVS tube.

[0009] As a preferred implementation of the antistatic touch screen based on the In-Cell architecture provided by the utility model, the first TVS tube, the second TVS tube, the third TVS tube and the fourth TVS tube are arranged in parallel.

[0010] As a preferred implementation of the anti-static touch screen based on the In-Cell architecture provided by the utility model, the main control unit is coupled to the display touch drive unit via the TP_I2C_SCL pin and the TP_I2C_SDA pin.

[0011] As a preferred implementation of the anti-static touch screen based on the In-Cell architecture provided by the utility model, the FLASH unit is coupled to the display touch drive unit through the TP_FLASH_CS pin, the TP_FLASH_SCK pin, the TP_FLASH_MOSI pin and the TP_FLASH_MISO pin, the first TVS tube is coupled to the TP_FLASH_CS pin, the second TVS tube is coupled to the TP_FLASH_SCK pin, the third TVS tube is coupled to the TP_FLASH_MOSI pin, and the fourth TVS tube is coupled to the TP_FLASH_MISO pin.

[0012] As a preferred implementation of the antistatic touch screen based on the In-Cell architecture provided by the utility model, the common ends of the first TVS tube, the second TVS tube, the third TVS tube and the fourth TVS tube are connected to a common ground.

[0013] As a preferred implementation of the antistatic touch screen based on the In-Cell architecture provided by the utility model, a metal antistatic cover is provided on the FLASH unit.

[0014] As a preferred implementation of the antistatic touch screen based on the In-Cell architecture provided by the utility model, the antistatic cover is made of copper sheet.

[0015] As a preferred implementation of the antistatic touch screen based on the In-Cell architecture provided by the utility model, an electrostatic guide harness is provided on the surface of the antistatic cover.

[0016] As a preferred implementation of the anti-static touch screen based on the In-Cell architecture provided by the utility model, the end of the electrostatic guide harness is grounded.

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

[0018] The utility model provides an antistatic touch screen based on the In-Cell architecture. Since TVS tubes are provided on all IO ports of the FLASH unit, the antistatic performance of the IO ports is greatly improved, thereby effectively improving the stability of the antistatic touch screen based on the In-Cell architecture. Since the space occupied by the TVS tube is very small, there is no need to make major changes to the original circuit, and the manufacturing cost is low.

[0019] In addition, the FLASH unit may be provided with a metal antistatic cover, which is made of copper sheet. The antistatic cover made of copper sheet can effectively improve the antistatic performance of the FLASH unit and further effectively improve the stability of the antistatic touch screen.

[0020] In addition, the surface of the antistatic cover can be provided with an electrostatic guide wire harness, the end of which is grounded. The electrostatic guide wire harness on the surface of the antistatic cover can be used to guide away static electricity as quickly as possible to prevent static electricity accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the connection structure of the anti-static touch screen based on the In-Cell architecture of the utility model;

[0023] Figure 2 It is a schematic diagram of the installation of the FLASH unit of the antistatic touch screen based on the In-Cell architecture of the utility model;

[0024] Figure 3 for Figure 2 A schematic structural diagram of another embodiment of an antistatic cover of a FLASH unit;

[0025] The markings in the figure are as follows: 1. Main control unit; 2. FLASH unit; 3. Display touch drive unit; 4. TFT unit; 5. TVS unit; 51. First TVS tube; 52. Second TVS tube; 53. Third TVS tube; 54. Fourth TVS tube; 6. Antistatic cover; 61. Electrostatic diversion harness. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0027] As described in the background technology, the existing technology for touch screens can be divided into three categories according to the location of the sensor: In-Cell, On-Cell and Out-Cell, where the Cell is two glass substrates and the part sandwiched in the middle. Among them, the In-Cell touch screen is a special touch screen, where the sensor of the touch screen is inside the Cell. Due to its excellent display effect, it is widely used in the field of smart watches. However, this In-Cell touch screen has a disadvantage, that is, the Flash pin IO port is easily damaged by external static electricity, which makes the entire smart watch scrapped.

[0028] In order to solve this technical problem, the utility model provides an anti-static touch screen based on the In-Cell architecture, comprising a main control unit 1, a FLASH unit 2 for storing driving firmware, a display touch driving unit 3 and a TFT unit 4, the main control unit 1 is directly coupled to the display touch driving unit 3, the FLASH unit 2 is directly coupled to the display touch driving unit 3, the display touch driving unit 3 is directly coupled to the TFT unit 4, and a TVS unit 5 is provided between the FLASH unit 2 and the display touch driving unit 3.

[0029] Through the above structural design, since TVS tubes are provided on all IO ports of the FLASH unit 2, the antistatic performance of the IO ports is greatly improved, thereby effectively improving the stability of the antistatic touch screen based on the In-Cell architecture. Since the space occupied by the TVS tube is very small, there is no need to make major changes to the original circuit, and the manufacturing cost is low.

[0030] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] like Figure 1 As shown, the anti-static touch screen based on the In-Cell architecture includes a main control unit 1, a FLASH unit 2 for storing driving firmware, a display touch driving unit 3 and a TFT unit 4, the main control unit 1 is directly coupled to the display touch driving unit 3, the FLASH unit 2 is directly coupled to the display touch driving unit 3, the display touch driving unit 3 is directly coupled to the TFT unit 4, and a TVS unit 5 is provided between the FLASH unit 2 and the display touch driving unit 3.

[0034] It should be noted that the TVS unit 5 includes a first TVS tube 51 , a second TVS tube 52 , a third TVS tube 53 and a fourth TVS tube 54 .

[0035] In addition, the first TVS tube 51 , the second TVS tube 52 , the third TVS tube 53 and the fourth TVS tube 54 are arranged in parallel.

[0036] The main control unit 1 is coupled to the display touch control driving unit 3 via the TP_I2C_SCL pin and the TP_I2C_SDA pin.

[0037] The FLASH unit 2 is coupled to the display touch drive unit 3 through the TP_FLASH_CS pin, the TP_FLASH_SCK pin, the TP_FLASH_MOSI pin and the TP_FLASH_MISO pin, the first TVS tube 51 is coupled to the TP_FLASH_CS pin, the second TVS tube 52 is coupled to the TP_FLASH_SCK pin, the third TVS tube 53 is coupled to the TP_FLASH_MOSI pin, and the fourth TVS tube 54 is coupled to the TP_FLASH_MISO pin.

[0038] The common ends of the first TVS tube 51 , the second TVS tube 52 , the third TVS tube 53 and the fourth TVS tube 54 are connected to a common ground.

[0039] The working mode of this embodiment is described below.

[0040] Since all IO ports of the FLASH unit 2 are equipped with TVS tubes, the antistatic performance of the IO ports is greatly improved, thereby effectively improving the stability of the antistatic touch screen based on the In-Cell architecture. Since the TVS tube occupies a very small space, there is no need to make major changes to the original circuit, and the manufacturing cost is low.

[0041] like Figure 2 As shown, the antistatic touch screen based on the In-Cell architecture provided in Example 1 is further optimized. Specifically, a metal antistatic cover 6 is provided on the FLASH unit 2 .

[0042] It should be noted that the antistatic cover 6 is made of copper sheet.

[0043] The working mode of this embodiment is described below.

[0044] The antistatic cover 6 made of copper sheet can effectively improve the antistatic performance of the FLASH unit 2 and further effectively improve the stability of the antistatic touch screen.

[0045] like Figure 3 As shown, the antistatic touch screen based on the In-Cell architecture provided in Example 1 or 2 is further optimized. Specifically, an electrostatic guide harness 61 is provided on the surface of the antistatic cover 6 .

[0046] It should be noted that the end of the electrostatic guide wire harness 61 is grounded.

[0047] The working mode of this embodiment is described below.

[0048] By utilizing the static electricity guiding wire bundle 61 on the surface of the antistatic cover 6 , static electricity can be guided away as quickly as possible through the static electricity guiding wire bundle 61 to prevent static electricity accumulation.

[0049] The terms "coupling" and "coupling" involved in the embodiments of the present application should be understood in a broad sense. For example, they may refer to a direct physical connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. An antistatic touch screen based on In-Cell architecture, characterized in that: The antistatic touch screen based on the In-Cell architecture comprises a main control unit (1), a FLASH unit (2) for storing drive firmware, a display touch drive unit (3) and a TFT unit (4); the main control unit (1) is directly coupled to the display touch drive unit (3); the FLASH unit (2) is directly coupled to the display touch drive unit (3); the display touch drive unit (3) is directly coupled to the TFT unit (4); and a TVS unit (5) is provided between the FLASH unit (2) and the display touch drive unit (3).

2. The antistatic touch screen based on the In-Cell architecture according to claim 1, characterized in that: The TVS unit (5) comprises a first TVS tube (51), a second TVS tube (52), a third TVS tube (53) and a fourth TVS tube (54).

3. The antistatic touch screen based on In-Cell architecture according to claim 2, characterized in that: The first TVS tube (51), the second TVS tube (52), the third TVS tube (53) and the fourth TVS tube (54) are arranged in parallel.

4. The antistatic touch screen based on In-Cell architecture according to claim 1, characterized in that: The main control unit (1) is coupled to the display touch control drive unit (3) via a TP_I2C_SCL pin and a TP_I2C_SDA pin.

5. The antistatic touch screen based on In-Cell architecture according to claim 2, characterized in that: The FLASH unit (2) is coupled to the display touch drive unit (3) via a TP_FLASH_CS pin, a TP_FLASH_SCK pin, a TP_FLASH_MOSI pin and a TP_FLASH_MISO pin; the first TVS tube (51) is coupled to the TP_FLASH_CS pin; the second TVS tube (52) is coupled to the TP_FLASH_SCK pin; the third TVS tube (53) is coupled to the TP_FLASH_MOSI pin; and the fourth TVS tube (54) is coupled to the TP_FLASH_MISO pin.

6. The antistatic touch screen based on the In-Cell architecture according to claim 5, characterized in that: The common ends of the first TVS tube (51), the second TVS tube (52), the third TVS tube (53) and the fourth TVS tube (54) are connected to a common ground.

7. The antistatic touch screen based on In-Cell architecture according to claim 1, characterized in that: The FLASH unit (2) is provided with a metal antistatic cover (6).

8. The antistatic touch screen based on the In-Cell architecture according to claim 7, characterized in that: The antistatic cover (6) is made of copper sheet.

9. The antistatic touch screen based on In-Cell architecture according to claim 7, characterized in that: The surface of the antistatic cover (6) is provided with an electrostatic guide wire harness (61).

10. The antistatic touch screen based on In-Cell architecture according to claim 9, characterized in that: The end of the electrostatic conduction harness (61) is grounded.

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