Piezoelectric induction touch screen
By adopting a combined design of temperature-resistant coating, heat insulation layer and defog layer in piezoelectric touch screen, the problems of poor use effect and water droplet condensation in high and low temperature environments are solved, and a longer service life and better service life are achieved experience of user.
Patent Information
- Application Number
- CN202420867950.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The existing piezoelectric touch screens have poor use effect in high and low temperature environments, and water droplets are prone to condense when the temperature difference is large, affecting the user experience and life.
The structural design includes a liquid crystal display, a temperature-resistant coating, a heat insulation layer and a defog layer is adopted. Through components such as transparent filling layer, glass protective layer and Teflon coating, it improves the ability to resist high and low temperatures and prevents water droplets from coagulating.
It improves the high and low temperature resistance of the touch screen, extends the service life, and prevents water droplets from condensing, improving user experience and practicality.
Smart Images
Figure CN222167578U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of touch screens, in particular to a piezoelectric inductive touch screen. Background Art
[0002] Piezoelectric touch technology is between resistive and capacitive touch technology. Resistive touch is simple in design and has the lowest cost, but resistive touch is more subject to its physical limitations, such as low transmittance, large detection area with high line count causing processor burden, and its application characteristics make it easy to age and thus affect its service life. Capacitive touch supports multi-touch function, has higher transmittance, lower overall power consumption, high contact surface hardness, no need to press, and longer service life;
[0003] In the prior art, the Chinese utility model with publication number: CN210402318U discloses a capacitive touch screen structure, including a liquid crystal display screen, a glass panel layer attached to the upper surface of the liquid crystal display screen, an electrode layer attached to the upper surface of the glass panel layer, an ink layer arranged at the edge of the upper surface of the electrode layer, and an outer support layer, a transparent filling layer is arranged between the outer support layer and the electrode layer, a piezoelectric sensing device is arranged between the ink layer and the electrode layer, and the piezoelectric sensing device includes a piezoelectric ceramic layer and metal electrodes respectively arranged on the upper side and the lower side of the piezoelectric ceramic layer; through the dual sensing of the piezoelectric sensing device and the electrode layer, the probability of the capacitive touch screen being accidentally touched and lit after the screen is turned off is reduced, thereby reducing unnecessary power consumption;
[0004] Although the touch screen structure in the above technical solution reduces the probability of false touches and reduces power consumption, the touch screen has poor resistance to high and low temperatures during use, and the use effect of the touch screen is reduced when the temperature is high or low. At the same time, when the temperature difference between the touch screen and the outside temperature is large, water droplets may condense on the screen surface, thereby affecting the use of the touch screen. Therefore, we need to propose a piezoelectric sensing touch screen. Utility Model Content
[0005] The purpose of the utility model is to provide a piezoelectric sensing touch screen, improve the high and low temperature resistance of the touch screen, thereby increasing the service life of the touch screen, and at the same time ensure that the touch screen reduces the condensation of water droplets when the temperature difference between the outside and the touch screen is large, so that the touch screen has a good experience when used, so as to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a piezoelectric induction touch screen comprises a liquid crystal display screen, an electrode layer is arranged on the upper surface of the liquid crystal display screen, an ink layer is arranged on the upper surface of the electrode layer, a transparent filling layer is arranged in the middle of the ink layer, a second heat-resistant coating is arranged on the upper surface of the ink layer, a glass protective layer is arranged on the upper surface of the second heat-resistant coating layer, a defogging layer is arranged on the upper surface of the glass protective layer, a first heat-resistant coating is arranged on the lower surface of the liquid crystal display screen, a heat-insulating layer is arranged on the lower surface of the first heat-resistant coating layer, and a backlight panel is arranged on the lower surface of the heat-insulating layer.
[0007] Preferably, the defogging layer includes an anti-fog film, a Teflon coating and an anti-oxidation coating, the Teflon coating is sprayed on the upper surface of the anti-fog film, the anti-oxidation coating is sprayed on the upper surface of the glass protective layer, and the anti-fog film is bonded to the upper surface of the anti-oxidation coating.
[0008] Preferably, the glass protection layer comprises an outer glass layer and an inner glass layer, the anti-oxidation coating is sprayed on the upper surface of the outer glass layer, and the inner glass layer is bonded to the lower surface of the outer glass layer.
[0009] Preferably, the cross section of the ink layer is arranged in a rectangular frame, a piezoelectric sensing component is arranged inside the ink layer, and the width of the piezoelectric sensing component is smaller than the width of the ink layer.
[0010] Preferably, the piezoelectric sensing component comprises a piezoelectric ceramic layer, the upper surface and the lower surface of the piezoelectric ceramic layer are both provided with metal electrodes, and both sides of the two groups of the metal electrodes are bonded with insulating layers.
[0011] Preferably, the electrode layer is a conductive layer with a pattern structure formed by etching an ITO coating layer, wherein a group of the insulating layers is in contact with the upper surface of the electrode layer.
[0012] Preferably, the outer glass layer is high-strength scratch-resistant glass, and the inner glass layer is high-transparency shatter-resistant glass.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The utility model mainly improves the high and low temperature resistance of the liquid crystal display screen through the cooperation between the first temperature-resistant coating, the second temperature-resistant coating, the heat-insulating layer and the defogging layer, thereby improving the service life of the liquid crystal display screen. At the same time, the Teflon coating and the anti-fog film cooperate with each other to allow the condensed water droplets to combine and flow downward, thereby preventing the condensed water droplets on the screen from affecting the use of the screen, improving the use experience of the piezoelectric induction touch screen, and improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the structure of the piezoelectric sensing component of the utility model;
[0017] Figure 3 This is a schematic diagram of the glass panel layer structure of the utility model;
[0018] Figure 4 It is a schematic diagram of the demisting layer structure of the utility model.
[0019] In the figure: 1. LCD screen; 2. First temperature-resistant coating; 3. Heat-insulating layer; 4. Electrode layer; 5. Ink layer; 6. Piezoelectric sensing component; 61. Piezoelectric ceramic layer; 62. Metal electrode; 63. Insulating layer; 7. Transparent filling layer; 8. Second temperature-resistant coating; 9. Glass protection layer; 91. Outer glass layer; 92. Inner glass layer; 10. Defogging layer; 101. Anti-fog film; 102. Teflon coating; 103. Anti-oxidation coating; 11. Backlight panel. DETAILED DESCRIPTION
[0020] 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 in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1-4 The utility model provides a technical solution: a piezoelectric induction touch screen includes a liquid crystal display screen 1, an electrode layer 4 is arranged on the upper surface of the liquid crystal display screen 1, an ink layer 5 is arranged on the upper surface of the electrode layer 4, a transparent filling layer 7 is arranged in the middle of the ink layer 5, a second heat-resistant coating 8 is arranged on the upper surface of the ink layer 5, a glass protection layer 9 is arranged on the upper surface of the second heat-resistant coating 8, a defogging layer 10 is arranged on the upper surface of the glass protection layer 9, a first heat-resistant coating 2 is arranged on the lower surface of the liquid crystal display screen 1, a heat insulation layer 3 is arranged on the lower surface of the first heat-resistant coating 2, and a backlight panel 11 is arranged on the lower surface of the heat insulation layer 3.
[0022] The defogging layer 10 includes an anti-fog film 101, a Teflon coating 102 and an anti-oxidation coating 103. The Teflon coating 102 is sprayed on the upper surface of the anti-fog film 101, and the anti-oxidation coating 103 is sprayed on the upper surface of the glass protective layer 9. The anti-fog film 101 is bonded to the upper surface of the anti-oxidation coating 103. The Teflon coating 102 has excellent non-stick properties and the surface is not stained with water or oil. The anti-fog film 101 contains a high molecular active substance that can form a nano-hydrophilic transparent film on the surface of the screen to prevent water droplets from appearing on the screen surface.
[0023] The glass protection layer 9 includes an outer glass layer 91 and an inner glass layer 92. The anti-oxidation coating 103 is sprayed on the upper surface of the outer glass layer 91. The inner glass layer 92 is bonded to the lower surface of the outer glass layer 91. The transparent filling layer 7 can be made of UV transparent material to reduce the impact on the display effect.
[0024] The cross-section of the ink layer 5 is set in a rectangular frame. A piezoelectric sensing component 6 is set inside the ink layer 5. The width of the piezoelectric sensing component 6 is smaller than the width of the ink layer 5. A dual sensing structure of the piezoelectric sensing component 6 plus the electrode layer 4 is adopted to reduce the possibility of the touch screen being accidentally touched and lit after the screen is turned off. The setting of the insulating layer 63 can shield the influence from the electrode layer 4.
[0025] The piezoelectric sensing component 6 includes a piezoelectric ceramic layer 61, and metal electrodes 62 are provided on the upper and lower surfaces of the piezoelectric ceramic layer 61. Insulating layers 63 are bonded to both sides of the two groups of metal electrodes 62. When the screen is turned off, the liquid crystal display screen 1 and the electrode layer 4 stop working. When the screen is under pressure, the piezoelectric ceramic layer 61 is compressed and deformed to generate electrical signals on the upper and lower sides. The metal electrode 62 and the electrode lead wire transmit the electrical signal to the device processor. After receiving the electrical signal from the piezoelectric ceramic layer 61, the processor activates the electrode layer 4 of the capacitive touch screen. After detecting the touch signal, the electrode layer 4 activates the liquid crystal display screen 1. Since the electrode layer 4 is activated only after the piezoelectric ceramic layer 61 generates an electrical signal, the power consumption of the touch screen when the screen is turned off is reduced.
[0026] The electrode layer 4 is a conductive layer with a graphic structure formed by etching the ITO coating layer, in which a group of insulating layers 63 are in contact with the upper surface of the electrode layer 4, ensuring that the piezoelectric sensing component 6 is located in the non-visible area and will not affect the display effect. During the pressing process, the deformation on the upper side of the glass protective layer 9 is larger, and the deformation on the lower side is smaller, so that the piezoelectric sensing component 6 on the upper side is more accurate.
[0027] The outer glass layer 91 is a high-strength anti-scratch glass, and the inner glass layer 92 is a highly transparent anti-shatter glass, so that the touch screen has anti-scratch and anti-shatter properties, thereby improving the overall service life.
[0028] When in use, the heat generated by the inside and outside is dissipated through the first heat-resistant coating 2 and the second heat-resistant coating 8 on the liquid crystal display screen 1, thereby improving the high and low temperature resistance of the liquid crystal display screen 1. At the same time, through the cooperation of the anti-fog film 101 and the Teflon coating 102 on the defogging layer 10, condensed water droplets can flow down to prevent water droplets from appearing on the touch screen surface, thereby improving the effect of using the touch screen. At the same time, under the action of the glass protective layer 9, the service life of the touch screen is increased.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A piezoelectric touch screen, comprising a liquid crystal display (1), Features: The upper surface of the liquid crystal display screen (1) is provided with an electrode layer (4), the upper surface of the electrode layer (4) is provided with an ink layer (5), the middle part of the ink layer (5) is provided with a transparent filling layer (7), the upper surface of the ink layer (5) is provided with a second heat-resistant coating (8), the upper surface of the second heat-resistant coating (8) is provided with a glass protection layer (9), the upper surface of the glass protection layer (9) is provided with a defogging layer (10), the lower surface of the liquid crystal display screen (1) is provided with a first heat-resistant coating (2), the lower surface of the first heat-resistant coating (2) is provided with a heat insulation layer (3), and the lower surface of the heat insulation layer (3) is provided with a backlight panel (11).
2. The piezoelectric touch screen according to claim 1, Features: The defogging layer (10) comprises an antifogging film (101), a Teflon coating (102) and an anti-oxidation coating (103); the Teflon coating (102) is sprayed on the upper surface of the antifogging film (101); the anti-oxidation coating (103) is sprayed on the upper surface of the glass protective layer (9); and the antifogging film (101) is bonded to the upper surface of the anti-oxidation coating (103).
3. The piezoelectric touch screen according to claim 2, Features: The glass protection layer (9) comprises an outer glass layer (91) and an inner glass layer (92), the anti-oxidation coating (103) is sprayed on the upper surface of the outer glass layer (91), and the inner glass layer (92) is bonded to the lower surface of the outer glass layer (91).
4. The piezoelectric touch screen according to claim 3, Features: The cross section of the ink layer (5) is arranged in the form of a rectangular frame. A piezoelectric sensing component (6) is arranged inside the ink layer (5). The width of the piezoelectric sensing component (6) is smaller than the width of the ink layer (5).
5. The piezoelectric touch screen according to claim 4, Features: The piezoelectric sensing component (6) comprises a piezoelectric ceramic layer (61), the upper surface and the lower surface of the piezoelectric ceramic layer (61) are both provided with metal electrodes (62), and both sides of the two groups of the metal electrodes (62) are bonded with insulating layers (63).
6. The piezoelectric touch screen according to claim 5, Features: The electrode layer (4) is a conductive layer with a patterned structure formed by etching an ITO coating layer, wherein a group of the insulating layers (63) contacts the upper surface of the electrode layer (4).
7. The piezoelectric touch screen according to claim 6, Features: The outer glass layer (91) is a high-strength scratch-resistant glass, and the inner glass layer (92) is a high-transparency shatter-resistant glass.