Sensing device for capacitive touch panel
A technology of capacitive touch and sensing devices, applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., can solve the problem of increasing the time of touch sensing, not meeting the needs of use, capacitance Sensing performance reduction of touch panel
Active Publication Date: 2016-08-03
HANNSTAR DISPLAY CORPORATION
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Problems solved by technology
[0005] However, with the increasing demand for capacitive touch panels and the increasing demand for touch accuracy, the amount of data that needs to be processed by the sensing device of the capacitive touch panel A large increase also relatively increases the time required for touch sensing, resulting in a decrease in the sensing performance of the capacitive touch panel, which does not meet the needs of use, and each different capacitive touch panel because of its own The capacitive characteristics of the structure are different. To complete the sensing correctly, it must be matched with the corresponding sensing device to sense according to its capacitive characteristics. For manufacturers, all kinds of capacitive touch panels must be matched with various A corresponding sensing device will cause great inconvenience in the manufacturing process
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[0036] see figure 1 , figure 1 It is a schematic diagram of an embodiment of the sensing device of the capacitive touch panel of the present invention. like figure 1 Among them, the sensing device 10 of the capacitive touch panel 20 of the present invention is used to sense a capacitive touch panel 20 and generate a corresponding output signal So, which includes a sensing module 30 and a processing module 40. The sensing module 30 is coupled to the capacitive touch panel 20 for providing a driving voltage SD and a reference voltage SR to the capacitive touch panel 20, and sensing the capacitive touch panel 20 according to the driving voltage SD and the reference voltage. A sensing voltage SS generated by the voltage SR. The processing module 40 is coupled to the sensing module 30 for performing a charging / discharging process on the sensing circuit 30 and generating the corresponding output signal So according to the sensing voltage SS.
[0037] see figure 2 , figure 2 I...
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The invention provides a sensing device for a capacitive touch panel, used for sensing a capacitive touch panel and generating a corresponding output signal, which includes a sensing module and a processing module. The sensing module is coupled to the capacitive touch panel for providing a driving voltage and a reference voltage of the capacitive touch panel, and generating a sensing voltage according to an initial capacitance value and a capacitance value. The processing module is coupled to the sensing module, and is used for charging / discharging the sensing circuit, and generating the corresponding output signal according to the sensing voltage.
Description
technical field [0001] The present invention relates to a sensing device for a capacitive touch panel, in particular to a sensing device for a capacitive touch panel that integrates multiple sensing methods and can quickly sense the capacitive touch panel. Background technique [0002] In recent years, the technology related to touch sensing has been greatly improved, and it has great convenience in use. Therefore, various touch panels have been widely used in various electronic products. [0003] Touch panels can be classified into resistive, capacitive, electromagnetic, surface acoustic wave (SAW) and infrared (IR) touch panels according to their driving methods and structural designs. The two most common types today are resistive touch panels and capacitive touch panels. For the resistive touch panel, the user needs to apply pressure on the resistive touch panel, so as to conduct some areas inside the resistive touch panel to generate corresponding coordinate signals. H...
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IPC IPC(8): G06F3/044
Inventor 黄建翔陈纯熙锺润世
Owner HANNSTAR DISPLAY CORPORATION