A signal scanning calculation method and system for an infrared touch system
A technology of infrared touch and calculation method, which is applied in the input/output process of calculation and data processing, instruments, etc., which can solve the problems of misjudgment, low touch precision of infrared tube touch products, etc., and achieve the effect of ensuring accuracy
Active Publication Date: 2014-10-22
GUANGZHOU SHIRUI ELECTRONICS
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Problems solved by technology
[0009] The purpose of the present invention is to solve the following problems: 1. The touch fineness of the infrared tube touch product is not high; 2. When the infrared tube touch product recognizes multiple simultaneous touches, there will be a problem of misjudgment
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[0037] In order to make the present invention easier to understand, the present invention will be further described below in conjunction with the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention.
[0038] Such as image 3 , the embodiment of the present invention provides an infrared touch system, which has a rectangular touch screen 11, 21 with an infrared emitting frame 10, 20 and a receiving frame, and includes a control circuit 30, which is used to control an infrared emitting tube in the emitting frame to emit infrared light. There are more than one infrared receiving tubes in the opposite receiving frame to receive infrared light at the same time or one by one in sequence, so that the touch surface forms a dense two-dimensional sensing optical network;
[0039]The infrared touch system also includes a chip storing a signal scanning calculation program, which is used to block the sensing optical network to generate a ...
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The invention discloses a method for scanning and calculating a signal of an infrared touch system and the infrared touch system. The method comprises the following steps of: A, when an infrared emitting pipe in an emitting frame of the infrared touch system emits infrared light, simultaneously or gradually receiving the infrared light according to a sequence by using more than one infrared receiving pipe in a receiving frame opposite to the emitting frame, so that a dense two-dimensional induction light network is formed on a touch surface; B, when at least one touch object is contacted with a touch screen, shading the induction light network, generating a light intensity signal, determining shaded infrared light rays according to the light intensity signal, combining a plurality of intersection points formed by intersecting a plurality of transverse and longitudinal shaded infrared light rays, judging whether a set of the plurality of intersection points is an actual touch point or not, and calculating the coordinate of the actual touch point; and C, eliminating data of pseudo touch points, and outputting data of actual touch points. Therefore, the calculated touch points have high coordinate fineness; and the problem of misjudgment is solved when simultaneous multipoint touch is recognized.
Description
technical field [0001] The invention relates to the technical field of infrared touch. Background technique [0002] Existing infrared touch screen structure, such as figure 1 As shown, it is basically formed by a rectangular circuit board frame, that is, a row of infrared emitting tubes 102 on one side frame, a row of infrared receiving tubes 103 on the opposite side frame, and a row of infrared emitting tubes on a bottom frame 101, the opposite bottom frame is a row of infrared receiving tubes 104, forming a horizontal and vertical infrared matrix in the X-axis and Y-axis of the circuit board frame. Of course, in practical applications, the range of light emitted by an infrared emitting tube is a sector, which can be received by several infrared receiving tubes on the opposite side. The receiving tube is detected. [0003] The existing infrared touch system has the following disadvantages, the touch fineness is not high, and multi-touch is easy to cause misjudgment: Whe...
Claims
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IPC IPC(8): G06F3/042
Inventor 黄安麒于士坤
Owner GUANGZHOU SHIRUI ELECTRONICS