Pressure sensing detection device, electronic equipment and touch display
A touch screen and inductive detection technology, which is applied to the input/output process of electrical digital data processing, instruments, and data processing, etc. The effect of reducing circuit power consumption, improving accuracy and sensitivity
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Embodiment 1
[0126] In view of the above technical problems, the embodiment of the present invention proposes a pressure-sensing detection device, a touch display screen and electronic equipment, which can effectively improve the sensitivity and accuracy of pressure-sensing detection.
[0127] Figure 4 A schematic diagram of a pressure sensing detection device 200 provided by an embodiment of the present invention is shown, and the pressure sensing detection device 200 includes a pressure sensor array 3000 and a differential amplifier 210 .
[0128] The pressure sensor array 3000 is located in the touch screen, and the pressure in the touch input signal on the touch screen will be transmitted to the pressure sensor array 3000 .
[0129] Specifically, the touch input signal is a signal generated when an external object (such as a user's finger, or a sensor pen, etc.) contacts the touch display screen. The touch input signal includes a pressure signal, that is, a signal in the Z direction ...
Embodiment 2
[0149] Based on the above embodiment, preferably, in this embodiment, the deformation difference of the first half-bridge circuit is the largest in the pressure sensor array 3000, and the deformation difference indicates that the first pressure sensor in the same half-bridge circuit The difference between the deformation of the unit and the deformation of the second pressure sensor unit.
[0150] It should be understood that the deformation difference of the first half-bridge circuit is the largest in the pressure sensor array 3000 , indicating that the row where the first half-bridge circuit is located is the row closest to the touch position in the pressure sensor array 3000 .
[0151] For example, above combined Figure 5 In the example described, when the touch position is M1, the half-bridge circuit 3500 on the row closest to M1 is selected as the first half-bridge circuit.
[0152] Although the half-bridge circuit 3400 is also very close to M1, the half-bridge circuit 3...
Embodiment 3
[0157] Based on the above embodiments, preferably, in this embodiment, the deformation difference of the second half-bridge circuit is the largest among other half-bridge circuits in the pressure sensor array except the first half-bridge circuit.
[0158] According to the working principle of the full-bridge circuit described in Embodiment 1, the purpose is to make the ΔV1 and ΔV2 generated in the full-bridge circuit composed of the first half-bridge circuit and the second half-bridge circuit as large as possible. Embodiment 2 It is described that ΔV1 is the largest, but in this embodiment, ΔV2 is also as large as possible, for example, the largest except for the first half-bridge circuit.
[0159] In the selection of a specific half-bridge circuit, a row of half-bridge circuits that are as close as possible to the contact position is usually selected as the second half-bridge circuit (the closer to the touch position, the greater the passing deformation). The arrangement of e...
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