Touch integrated display panel and preparation method

Abstract

The invention discloses a touch integrated display panel and a preparation method thereof, comprising a glass cover plate, a capacitive touch module and a display module, characterized in that: the touch integrated display panel is also provided with a capacitive pressure sensor and a signal enhancer, the capacitive touch module is placed below the glass cover plate, an OCA optical glue is connected between the glass cover plate and the capacitive touch module, a display module is located below the capacitive touch module, an OCA optical glue is connected between the capacitive touch module and the display module, a capacitive pressure sensor is provided below the display module, a signal enhancer is located below the pressure sensor, the capacitive touch module comprises a front polarizer, a touch circuit, and an ITO functional glass, the ITO functional glass is designed with a touch drive electrode in the X direction, a sensing electrode routing in the Y direction, the touch drive electrode in the X direction and the sensing electrode routing in the Y direction are independent of each other. The invention has the characteristics of sensitive touch and anti-mistouch.

Description

Technical Field

[0001] The present invention relates to the field of electronic display technology, and in particular to a touch integrated display panel and a preparation method thereof. Background Art

[0002] With the development of touch technology and display technology, touch display devices have been increasingly sought after by people. They not only save space and are easy to carry, but also can be directly operated by users with fingers or stylus pens, making them comfortable and convenient to use. At present, they have been widely used in various technical fields, such as the common personal digital assistants (PDAs), touch mobile phones, portable notebook computers, etc.

[0003] At present, in order to reduce the thickness of the display panel and realize the touch function, the touch structure is usually integrated into the display panel. When a capacitive touch structure is used, the touch electrode in the capacitive touch structure can be directly made on the same substrate as the display structure. Under this setting mode, both the touch electrode and the touch drive circuit and other related touch structures must be reasonably laid out to avoid occupying too much area of ​​the display panel and causing the area of ​​the non-display area of ​​the frame of the display panel to be too large. At the same time, when the touch structure is reasonably laid out, the display effect and the touch effect must also be taken into account. In terms of the touch effect, the existing touch display device often has false touches and failures such as water droplets and dust. When there are water droplets or dust on the glass cover, the screen is clicked, and symptoms such as screen failure or insensitive touch often occur. The main reason is that after the screen is wetted by water, due to the conductive properties of water, when water touches the screen, the hand touches it again, the current will be affected, so the above calculation is inaccurate, which is also called screen drift. To solve this problem, a signal enhancer is installed under the touch integrated display panel. Therefore, it is necessary to design a touch-sensitive and anti-mistouch touch-integrated display panel and a preparation method thereof. Summary of the invention

[0004] The object of the present invention is to provide a touch-integrated display panel and a manufacturing method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a touch-integrated display panel, comprising a glass cover, a capacitive touch module and a display module, characterized in that: the touch-integrated display panel is also provided with a capacitive pressure sensor and a signal enhancer, which add pressure recognition function and recognition accuracy function to the touch-integrated display panel, and by utilizing the capacitive pressure sensor, it can provide users with an anti-mistouch function and even develop a new operating experience, greatly improving the humanized and considerate function, while the pressure enhancer enhances the sensitivity of the touch screen to achieve point-to-point detection.

[0006] According to the above technical solution, the capacitive touch module is placed under the glass cover plate, OCA optical glue is connected between the glass cover plate and the capacitive touch module, the display module is under the capacitive touch module, OCA optical glue is connected between the capacitive touch module and the display module, a capacitive pressure sensor is provided under the display module, and a signal enhancer is provided under the pressure sensor. The OCA optical glue is colorless and transparent, has a light transmittance of more than 90%, has good bonding strength, can be cured at room temperature or medium temperature, and has small curing shrinkage, etc., thereby increasing the connection stability between the modules of the touch integrated display panel.

[0007] According to the above technical solution, the capacitive touch module includes a front polarizer, a touch circuit, and an ITO functional glass. The ITO functional glass is an N-type oxide semiconductor with good conductivity and transparency. The ITO functional glass is designed with touch drive electrodes in the X direction and sensing electrode wiring in the Y direction. The touch drive electrodes in the X direction and the sensing electrode wiring in the Y direction are independent of each other. When a finger touches the screen, due to the human body electric field, the touch drive electrodes in the X direction and the sensing electrodes in the Y direction will cross on the surface of the capacitive touch module to form a coupling capacitor. Compared with high-frequency current, the capacitor is a direct conductor, and the finger will absorb a very small current from the contact point. The integrated display panel will obtain the finger touch position after control calculation.

[0008] According to the above technical solution, the display module includes front light-guiding glass, liquid crystal, rear light-guiding glass, rear polarizer and backlight panel.

[0009] According to the above technical solution, the front light-guiding glass, liquid crystal, and rear light-guiding glass are combined into a liquid crystal panel, and the liquid crystal panel is used for screen display imaging. The backlight panel will emit white light that passes through the rear polarizer to the liquid crystal panel as polarized light. The polarized light is twisted by the arrangement of liquid crystal molecules in the liquid crystal panel to the front polarizer to form color images of various colors.

[0010] According to the above technical solution, the capacitive pressure sensor is composed of 18*9 golden rectangles, each of which is a separate parallel plate capacitor. There is a certain gap between each parallel plate capacitor, and the gap is a high-speed transmission channel.

[0011] According to the above technical solution, the glass cover is made of flexible glass. Pressing the glass cover hard will cause a certain degree of bending, thereby shortening the distance from a certain glass cover to the parallel plate capacitor block in the corresponding area below the glass cover. The parallel plate capacitor will sense this pressure signal and transmit the signal to the processor through a high-speed transmission channel to provide signal feedback.

[0012] According to the above technical solution, the 18*9 parallel plate capacitors in the capacitive pressure sensor are independent blocks. After one of the parallel plate capacitors senses the pressure signal, it will skip the signal of the capacitive touch module and distinguish it from the ordinary touch area. The capacitive pressure sensor can be applied to the game neighborhood. Before opening each game APP, an 18*9 color block will pop up on the screen. The position and size of the 18*9 color block correspond to the 18*9 parallel plate capacitor block below the screen. The specific operation method is:

[0013] The user can select the corresponding color block. After confirming the selection, the corresponding color block will skip the ordinary touch recognition and change to pressure touch recognition. At this time, touching the selected corresponding color block area with conventional touch force cannot be recognized by the capacitive touch and no corresponding signal feedback will be made. The corresponding color block area will only be sensed by the capacitive pressure sensor when it is pressed with a certain force, so that the secondary signal will be transmitted to the processor for feedback. This function greatly solves the trouble of accidental touch when playing games. After the capacitive pressure sensor changes the non-game touch area to pressure touch recognition, even if the information that pops up suddenly is accidentally touched, the game will not be interrupted to enter the information page. If the user wants to enter the information page immediately, he can also enter the information page by pressing with a certain force, realizing the prevention of accidental touch without affecting the basic operation, which is truly satisfactory. In addition, the pressure touch recognition of the capacitive pressure sensor can also be applied to the field of curved screen touch integrated display panels. The color blocks at the curved edges on both sides of the curved screen are changed to pressure touch recognition to prevent accidental touch without affecting other operations.

[0014] According to the above technical solution, the signal enhancer is located at the bottom of the touch integrated display panel, and is used to sense and amplify the weak current fluctuations when touching the screen, thereby enhancing the accuracy of signal processing. The signal enhancer can cooperate with the higher refresh rate supported by the built-in graphics card of the touch integrated panel so that the touch integrated display panel can recognize very small signal changes, which can greatly increase the accuracy of the above signal processing. In addition, with the higher refresh rate supported by the built-in graphics card of the touch integrated panel, even if water forms a conductive surface, a tiny signal difference will still be formed in the conductive surface at the position of the finger when the hand taps it, so as to determine the touch position, thereby solving the touch failure symptom of the touch integrated display panel when encountering water droplets and dust. When applied to the gaming field, even if you play games for a long time and have sweaty hands, it will not affect the touch operation and the gaming experience.

[0015] The preparation method of the touch integrated display panel is characterized in that it includes a glass cover plate, a capacitive touch module and a display module, and they are connected to each other using OCA optical glue. The full bonding production process is used to reduce the overall thickness of the touch integrated display panel. The full bonding process also makes the components fully bonded without gaps, eliminating the reflection and light loss caused by the air layer. The ITO functional glass has uniform thickness and uses high-temperature baking and immersion in various acid and alkali solutions to reduce the change of resistance and high temperature resistance, acid and alkalinity. The preparation method of the touch integrated display panel adopts integrated components as a whole to be laminated and connected from top to bottom.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) By providing a voltage-type pressure sensor, ordinary touch and pressure touch are distinguished, which greatly solves the trouble of accidental touch when playing games. After the capacitive pressure sensor changes the non-game touch area to pressure touch recognition, even if the user accidentally touches the information that pops up, the game will not be interrupted to enter the information page. If the user wants to enter the information page immediately, he can also enter the information page by pressing with a certain force, which achieves the prevention of accidental touch while not affecting basic operations, and is truly satisfactory. In addition, the pressure touch recognition of the capacitive pressure sensor can also be applied to the field of curved screen touch integrated display panels. The color blocks at the curved edges of the curved screen are changed to pressure touch recognition, so as to achieve the characteristics of preventing accidental touch without affecting other operations;

[0018] (2) By providing a signal enhancer, the accuracy of signal processing of the capacitive touch module is increased, and the touch failure symptom when the touch integrated display panel encounters water droplets and dust is solved;

[0019] (3) By adopting full-fit packaging technology, screen reflection and display module light loss are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1 The present invention provides a technical solution: a touch-integrated display panel, including: a touch-integrated display panel, including a glass cover, a capacitive touch module and a display module, characterized in that: the touch-integrated display panel is also provided with a capacitive pressure sensor and a signal enhancer, which adds a pressure recognition function and a recognition accuracy function to the touch-integrated display panel, and by using the capacitive pressure sensor, it can provide users with an anti-mistouch function and even develop a new operating experience, greatly improving the humanized and considerate function, and the pressure enhancer enhances the sensitivity of the touch screen to achieve the point where the touch is pointed;

[0024] The capacitive touch module is placed under the glass cover plate, OCA optical glue is connected between the glass cover plate and the capacitive touch module, the display module is under the capacitive touch module, OCA optical glue is connected between the capacitive touch module and the display module, a capacitive pressure sensor is provided under the display module, and a signal enhancer is provided under the pressure sensor. OCA optical glue is colorless and transparent, has a light transmittance of more than 90%, has good bonding strength, can be cured at room temperature or medium temperature, and has small curing shrinkage, thereby increasing the connection stability between the modules of the touch integrated display panel;

[0025] The capacitive touch module includes a front polarizer, a touch circuit, and an ITO functional glass. The ITO functional glass is an N-type oxide semiconductor with good conductivity and transparency. The ITO functional glass is designed with touch drive electrodes in the X direction and sensing electrodes in the Y direction. The touch drive electrodes in the X direction and the sensing electrodes in the Y direction are independent of each other. When a finger touches the screen, due to the human body's electric field, the touch drive electrodes in the X direction and the sensing electrodes in the Y direction will cross on the surface of the capacitive touch module to form a coupling capacitor. Compared with high-frequency current, the capacitor is a direct conductor, and the finger will absorb a very small current from the contact point. The integrated display panel will obtain the finger touch position after control calculation.

[0026] The display module includes front light-guiding glass, liquid crystal, rear light-guiding glass, rear polarizer and backlight panel;

[0027] The front light-guiding glass, liquid crystal, and rear light-guiding glass are combined into a liquid crystal panel. The liquid crystal panel is used to display images on the screen. The backlight panel will emit white light, which passes through the rear polarizer to the liquid crystal panel as polarized light. The polarized light is twisted by the arrangement of liquid crystal molecules in the liquid crystal panel to the front polarizer to form color images of various colors.

[0028] The capacitive pressure sensor is composed of 18*9 golden rectangles. Each rectangle is a separate parallel plate capacitor. There is a certain gap between each parallel plate capacitor, and the gap is a high-speed transmission channel.

[0029] The glass cover is made of flexible glass. Pressing the glass cover hard will cause a certain degree of bending, which shortens the distance between a certain part of the glass cover and the parallel plate capacitor block in the corresponding area below the glass cover. The parallel plate capacitor will sense this pressure signal and transmit the signal to the processor through a high-speed transmission channel for signal feedback.

[0030] The 18*9 parallel plate capacitors in the capacitive pressure sensor are independent blocks. After one of the parallel plate capacitors senses the pressure signal, it will skip the signal of the capacitive touch module and distinguish it from the ordinary touch area. The capacitive pressure sensor can be applied to the game neighborhood. Before opening each game APP, an 18*9 color block will pop up on the screen. The position and size of the 18*9 color block correspond to the 18*9 parallel plate capacitor block at the bottom of the screen. The specific operation method is as follows:

[0031] The user can select the corresponding color block. After confirming the selection, the corresponding color block will skip the normal touch recognition and change to pressure touch recognition. At this time, touching the selected corresponding color block area with normal touch force cannot be recognized by the capacitive touch and no corresponding signal feedback will be made. Only when the corresponding color block area is pressed with a certain force, it will be sensed by the capacitive pressure sensor and transmit the signal to the processor for feedback. This function greatly solves the trouble of accidental touch when playing games. When playing games, the common operation area is the lower left corner or lower right corner of the screen. Because the fingers need to slide or touch the screen frequently, if a message pops up at the top of the screen, it is easy to make a mistake. Touching this information and popping up the information page affects the gaming experience. After changing the non-game touch area to pressure touch recognition through the capacitive pressure sensor, even if the pop-up information is accidentally touched, the game will not be interrupted to enter the information page. If the user wants to enter the information page immediately, he can also enter the information page by pressing with a certain force, realizing the prevention of accidental touch while not affecting basic operations, which is truly satisfactory. In addition, the pressure touch recognition of the capacitive pressure sensor can also be applied to the field of curved screen touch integrated display panels. The color blocks at the curved edges of the curved screen are changed to pressure touch recognition to prevent accidental touch without affecting other operations.

[0032] The signal booster is located at the bottom of the touch integrated display panel. It is used to sense the weak current fluctuations when touching the screen and amplify them to enhance the accuracy of signal processing. The signal booster can cooperate with the higher refresh rate supported by the built-in graphics card of the touch integrated panel to enable the touch integrated display panel to recognize very small signal changes. Nowadays, there is a common phenomenon in touch integrated display panels: when there are water droplets or dust on the glass cover, when clicking the screen, symptoms such as screen failure or insensitive touch often occur. The main reason is that after the screen is wetted by water, due to the conductive properties of water, when water touches the screen, the current will be affected when the hand touches it again. The above calculation is not accurate, which is also called screen drift. To solve this problem, a signal enhancer is installed under the touch integrated display panel, which can greatly increase the accuracy of the above signal processing. In addition, the built-in graphics card of the touch integrated panel supports a higher refresh rate. In this way, even if water forms a conductive surface, a tiny signal difference will still be formed at the position of the finger when the hand touches it, so as to determine the touch position, thereby solving the touch failure symptom of the touch integrated display panel when it encounters water droplets and dust. When applied to the game field, even if you play games for a long time and have sweaty hands, it will not affect the touch operation and the game experience.

[0033] The preparation method of the touch integrated display panel is characterized in that it includes a glass cover plate, a capacitive touch module and a display module, and they are connected to each other using OCA optical glue. The full bonding production process is used to reduce the overall thickness of the touch integrated display panel. The full bonding process also makes the components fully bonded without gaps, eliminating the reflection and light loss caused by the air layer. The ITO functional glass has uniform thickness and uses high-temperature baking and immersion in various acid and alkali solutions to reduce the change of resistance and high temperature resistance, acid and alkalinity. The preparation method of the touch integrated display panel adopts integrated components as a whole to be laminated and connected from top to bottom.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A touch integrated display panel, comprising a glass cover, a capacitive touch module and a display module, characterized in that: The touch-integrated display panel is also provided with a capacitive pressure sensor and a signal enhancer; The capacitive touch module is placed under the glass cover plate, OCA optical glue is connected between the glass cover plate and the capacitive touch module, a display module is placed under the capacitive touch module, OCA optical glue is connected between the capacitive touch module and the display module, a capacitive pressure sensor is provided under the display module, and a signal enhancer is placed under the capacitive pressure sensor; The capacitive touch module includes a front polarizer, a touch circuit, and an ITO functional glass. The ITO functional glass is designed with touch drive electrodes in the X direction and sensing electrode wiring in the Y direction. The touch drive electrodes in the X direction and the sensing electrode wiring in the Y direction are independent of each other. The display module includes a front light-guiding glass, a liquid crystal, a rear light-guiding glass, a rear polarizer and a backlight panel; The front light guide glass, liquid crystal, and rear light guide glass are combined into a liquid crystal panel. The backlight panel will emit white light, which will pass through the rear polarizer to the liquid crystal panel as polarized light. The polarized light will be twisted by the arrangement of liquid crystal molecules in the liquid crystal panel to the front polarizer to form color images of various colors. The capacitive pressure sensor is composed of 18*9 golden rectangles, each of which is a separate parallel plate capacitor, and there is a gap between each parallel plate capacitor, and the gap is a high-speed transmission channel; The glass cover is made of flexible glass. Pressing the glass cover hard will cause it to bend, shortening the distance between a certain glass cover and the parallel plate capacitor block in the corresponding area below the glass cover. The parallel plate capacitor will sense the pressure signal and transmit the signal to the processor through a high-speed transmission channel for signal feedback. The 18*9 parallel plate capacitors in the capacitive pressure sensor are independent blocks. After one of the parallel plate capacitors senses a pressure signal, it will skip the signal of the capacitive touch module and distinguish it from the ordinary touch area. The capacitive pressure sensor can be applied to the game neighborhood. Before opening each game APP, an 18*9 color block will pop up on the screen. The position and size of the 18*9 color block correspond to the 18*9 parallel plate capacitor block below the screen. The specific operation method is as follows: The user can select the corresponding color block. After confirming the selection, the corresponding color block will skip the normal touch recognition and change to pressure touch recognition. At this time, touching the selected corresponding color block area with conventional touch force cannot be recognized by the capacitive touch module and no corresponding signal feedback will be made. Only when the corresponding color block area is pressed with a certain force, it will be sensed by the capacitive pressure sensor and the signal will be transmitted to the processor for feedback.

2. The touch-integrated display panel according to claim 1, characterized in that: The signal enhancer is located at the bottom of the touch-integrated display panel and is used to sense and amplify the slight current fluctuations when the screen is touched, thereby enhancing the accuracy of signal processing. The signal enhancer can cooperate with the higher refresh rate supported by the graphics card built into the touch-integrated panel so that the touch-integrated display panel can recognize very small signal changes.

3. A method for preparing a touch-integrated display panel, comprising preparing the touch-integrated display panel as claimed in claim 1, characterized in that: It includes a glass cover plate, a capacitive touch module and a display module, which are bonded with OCA optical glue and a full-bonding process to reduce the overall thickness of the touch integrated display panel. The full-bonding process also allows the components to be fully bonded without gaps, eliminating reflections and light loss caused by the air layer. The ITO functional glass has uniform thickness and uses high-temperature baking and immersion in various acid and alkali solutions to reduce resistance changes and high-temperature resistance, acid and alkali resistance. The preparation method of the touch integrated display panel adopts integrated components as a whole, which are laminated and connected from top to bottom.

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