Piezoelectric ceramic touch sensing equipment with zero touch height and low error recognition rate

Abstract

The utility model discloses a piezoelectric ceramic touch sensing device with zero touch height and low error recognition rate, which comprises a touch screen arranged on a shell, the touch screen is provided with a touch area and a printing ink area positioned on the side edge of the touch area, an infrared light net is arranged above the upper surface of the touch screen at intervals, and the infrared light net is connected with the touch screen. The infrared light net is used for detecting the writing track of the touch pen in the touch area of the touch screen; the piezoelectric ceramic element is tightly attached and fixed to an ink area of the touch screen and is used for detecting a vibration signal of a glass surface of the touch screen; the output end of the piezoelectric ceramic element is electrically connected with a main control chip of the piezoelectric ceramic touch sensing equipment, and the main control chip is used for controlling the touch screen to work. According to the infrared touch screen, the piezoelectric ceramic is additionally arranged, so that the touch operation of the touch screen can be better detected, the phenomena of pen connection and misjudgment during writing of the infrared touch screen are reduced, the writing experience feeling of customers is improved, and the product competitiveness is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to touch equipment technical field especially relates to a zero touch height low false recognition rate piezoelectric ceramic touch sensing device. BACKGROUND

[0002] The touch height of the IR touch screen refers to the distance from the light net to the glass plane, and the touch height of the IR touch screen is generally within 3mm at present, when writing on the IR touch screen, the pen enters the infrared light net after being away from the screen by 3mm, the IR receives the signal, and the writing action is started, the distance between the pen and the screen is 0-3mm, and writing can be carried out, so that the writing continuous pen and misjudgment phenomenon are prone to occur. UTILITY MODEL CONTENT

[0003] The utility model discloses a zero touch height low false recognition rate piezoelectric ceramic touch sensing device, reduces the writing continuous pen and misjudgment phenomenon of infrared touch screen, improves customer writing experience, and improves product competitiveness.

[0004] The utility model discloses the technical scheme that adopts is:

[0005] A zero touch height low false recognition rate piezoelectric ceramic touch sensing device, which comprises a touch screen mounted on a shell, a touch area and an ink area located on the side of the touch area, an infrared light net is arranged above the upper surface of the touch screen in a spaced manner, and the infrared light net is used for detecting the writing track of a stylus in the touch area of the touch screen. The output end of the piezoelectric ceramic element is electrically connected with the main control chip of the piezoelectric ceramic touch sensing device, and the main control chip is used for controlling the work of the touch screen to realize the touch function, including displaying the touch track.

[0006] Further, the sensing coverage area of the infrared light net at least includes the touch area. Further, as a feasible implementation manner, the sensing coverage area of the infrared light net includes the touch area and the ink area.

[0007] Further, the infrared light net is located above the piezoelectric ceramic element as a whole.

[0008] Further, the interval distance between the infrared light net and the touch screen is no more than 3mm.

[0009] Further, the infrared circuit board is arranged around the touch screen, a plurality of groups of matched infrared emitting tubes and receiving tubes are arranged on the infrared circuit board, and the plurality of groups of matched infrared emitting tubes and receiving tubes are horizontally and vertically crossed to form the infrared light net.

[0010] Further, the piezoelectric ceramic element is separately fixed in the ink area of the touch screen through an adhesive.

[0011] Further, the output end of the piezoelectric ceramic element is electrically connected to the master control chip through a control amplification circuit; the control amplification circuit is used for amplifying the input signal so as to generate a readable frequency signal.

[0012] Further, the piezoelectric ceramic element is interconnected with the control amplification circuit through an external wire.

[0013] Further, the master control chip is configured to report the touch track of the display touch screen after the piezoelectric ceramic element outputs the vibration signal.

[0014] Further, the number of piezoelectric ceramic elements is proportional to the size of the piezoelectric ceramic touch sensing device.

[0015] The above technical scheme is adopted in the utility model, IR touch + piezoelectric ceramic structure matching combination, through the new piezoelectric ceramic, so as to better detect the touch operation of the touch screen, and then reduce the infrared touch screen writing continuous pen and misjudgment phenomenon, improve customer writing experience, improve product competitiveness. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described in detail in combination with the drawings and specific embodiments;

[0017] Fig. 1 It is the installation state schematic view of the piezoelectric ceramic element of the utility model;

[0018] Fig. 2 It is the connection schematic view of the piezoelectric ceramic element and control amplification circuit of the utility model;

[0019] Fig. 3 It is the half cut structure schematic view of the piezoelectric ceramic touch sensing device of the utility model with zero touch height and low misidentification rate. EMBODIMENT

[0020] In order to make the purpose, technical scheme and advantage of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application.

[0021] As Figs. 1 to 3The utility model discloses a kind of piezoelectric ceramic touch sensing equipment of zero touch height low false recognition rate, it includes the touch screen 1 installed on shell, touch screen 1 has touch area and the ink area located at the side of touch area, infrared light net 2 is configured with interval above the upper surface of touch screen 1, infrared light net 2 is used to detect the writing track of stylus in the touch area of touch screen 1;Piezoelectric ceramic element 3 is fixedly attached in the ink area of touch screen 1, piezoelectric ceramic element 3 is used to detect the vibration signal of the glass surface of touch screen 1;The output end of piezoelectric ceramic element 3 is electrically connected with the main control chip 5 of piezoelectric ceramic touch sensing equipment, and main control chip 5 is used to realize touch function, including display touch track.

[0022] Further, the sensing coverage area of the infrared light net 2 includes at least the touch area. Further, as a feasible implementation manner, the sensing coverage area of the infrared light net 2 includes the touch area and the ink area.

[0023] Further, the infrared light net 2 is located above the piezoelectric ceramic element 3 as a whole.

[0024] Further, the interval distance between the infrared light net 2 and the touch screen 1 is not greater than 3 mm.

[0025] Further, the infrared circuit board 6 is arranged around the touch screen 1, and a plurality of groups of matched infrared emitting tubes and receiving tubes are arranged on the infrared circuit board 6. The plurality of groups of matched infrared emitting tubes and receiving tubes are horizontally and vertically crossed to form the infrared light net 2.

[0026] Further, the piezoelectric ceramic element 3 is individually fixed to the ink area of the touch screen 1 by an adhesive.

[0027] Further, the output end of the piezoelectric ceramic element 3 is electrically connected to the main control chip 5 through a control amplification circuit 4. The control amplification circuit 4 is used for amplification processing of an input signal, so as to generate a readable frequency signal.

[0028] Further, the piezoelectric ceramic element 3 is interconnected with the control amplification circuit 4 through an external wire.

[0029] Further, the main control chip 5 is configured to report the touch track of the display touch screen 1 after the piezoelectric ceramic element 3 outputs a vibration signal.

[0030] Further, the number of the piezoelectric ceramic element 3 is proportional to the size of the piezoelectric ceramic touch sensing equipment.

[0031] This invention relates to a touch sensing device. When writing on an infrared touch (IR Touch) screen, the infrared touch sensor first receives the signal but does not report the touch signal. The touch must be made to touch the glass surface so that the acoustic wave sensor receives the touch vibration. Only then will the system report the touch information to the infrared touchscreen 1. This makes the touch height zero. The piezoelectric ceramic receives the vibration signal, converts mechanical energy into an electrical signal, and then processes the signal through a chip to output the IR touch control.

[0032] The working principle of the touch sensing device of this utility model will be explained in detail below:

[0033] like Fig. 1 As shown, the piezoelectric ceramic element 3 is individually fixed to the non-AA area (ink area) of the screen using an adhesive. This simultaneously reduces the light field height across the touch surface, allowing the light beam to be received at a height relative to the touch panel, thus unaffected by the piezoelectric ceramic fixing mechanism at the bottom. This reduces the light field height traveling across the touch surface. Therefore, the touch detection accuracy of the piezoelectric ceramic touch sensing device can be improved, while also simplifying the assembly of the touch sensing device.

[0034] like Fig. 2 As shown, the piezoelectric element and the control amplifier board circuit are further interconnected by external wiring. When an external force is applied to the fixed piezoelectric ceramic sensor through the glass, the piezoelectric ceramic deforms, generating an electric charge signal. This electric charge signal can be amplified and processed by the touch-controlled amplifier circuit 4, and finally converted into a readable frequency signal. Therefore, by measuring the output electrical signal, the change in physical quantity can be obtained.

[0035] By utilizing a piezoelectric ceramic vibration sensor to emit waves and generate echoes when writing on an object, the touch panel detects the contact position by calculating the frequency and location of the echoes. This touch panel can be made of any material that transmits sufficient radiation within a relevant wavelength vibration range to allow for reasonable measurement of the transmitted energy. Such materials include glass, which transmits a sufficient amount of vibration signal within the relevant wavelength range to allow for perceptible measurement of the transmitted energy.

[0036] like Fig. 3As shown, the infrared touch utilizes four infrared emission tubes and receiving tubes to form a horizontal and vertical crossed infrared light network 2, when an object touches the screen 1, the light in the XY direction passing through the position is blocked, at this time, the light received by the receiving tube is changed from strong to weak, the current is reduced, the system detects the change of the electric signal, calculates the blocked coordinate point position, and finally transmits to the display device to show.When writing on the infrared touch screen 1 of the utility model, the infrared touch will first receive the blocked coordinate point position signal, but does not calculate the touch behavior track information, the system internal algorithm will preferentially detect the ceramic signal to make a judgment, when the piezoelectric ceramic sensor receives the vibration signal generated by the pen and the glass surface writing, the system reports the touch information to the infrared touch screen 1 for processing according to the vibration frequency of different material pens, so that the touch height requirement can be reduced.

[0037] The utility model adopts the above technical scheme, IR touch + piezoelectric ceramic structure matching combination, through the new piezoelectric ceramic, so as to better detect the touch operation of the touch screen 1, and then reduce the writing and misjudgment phenomenon of the infrared touch screen 1, improve the customer writing experience, and improve the product competitiveness.

[0038] Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present application is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

Claims

1. A zero-touch, highly low false recognition rate piezoelectric ceramic touch sensing device, characterized by: It includes a touch screen mounted on a housing, the touch screen has a touch area and an ink area located at the side of the touch area, an infrared light net is arranged above the upper surface of the touch screen in a spaced manner, the infrared light net is used for detecting the writing track of a stylus in the touch area of the touch screen; a piezoelectric ceramic element is fixedly arranged in the ink area of the touch screen, the piezoelectric ceramic element is used for detecting the vibration signal of the glass surface of the touch screen; the output end of the piezoelectric ceramic element is electrically connected with a main control chip of the piezoelectric ceramic touch sensing device, and the main control chip is used for controlling the operation of the touch screen.

2. A zero-touch, low false identification rate piezoelectric ceramic touch sensing device according to claim 1, wherein: The sensing coverage area of the infrared light net at least includes the touch area.

3. A zero-touch, low false identification rate piezoelectric ceramic touch sensing device according to claim 1, wherein: The infrared light net is located above the piezoelectric ceramic element as a whole.

4. The zero-touch, low false-discovery rate piezoelectric ceramic touch- sensing device of claim 1, wherein: The spacing distance between the infrared light net and the touch screen is not greater than 3 mm.

5. The piezoelectric ceramic touch sensing device of claim 1, wherein: An infrared circuit board is arranged around the touch screen, a plurality of groups of matched infrared emitting tubes and receiving tubes are arranged on the infrared circuit board, and the plurality of groups of matched infrared emitting tubes and receiving tubes are horizontally and vertically crossed to form the infrared light net.

6. A zero-touch, low false-discovery rate piezoelectric ceramic touch- sensing device according to claim 1, wherein: The piezoelectric ceramic element is individually fixed in the ink area of the touch screen by an adhesive.

7. The piezoelectric ceramic touch sensitive device of claim 1, wherein: The output end of the piezoelectric ceramic element is electrically connected with the main control chip through a control amplification circuit; the control amplification circuit is used for amplifying and processing the input signal, so as to generate a readable frequency signal.

8. A zero-touch, low false-discovery rate piezoelectric ceramic touch- sensing device according to claim 7, wherein: The piezoelectric ceramic element is interconnected with the control amplification circuit through an external wire.

9. The piezoelectric ceramic touch sensitive device of claim 1, wherein: The main control chip is configured to report the touch track of the display touch screen after the piezoelectric ceramic element outputs the vibration signal.

10. The piezoelectric ceramic touch sensing device of claim 1, wherein: The number of piezoelectric ceramic elements is proportional to the size of the model of the piezoelectric ceramic touch sensing device.

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