Multi-point touch display screen device
A technology of touch screen and multi-touch, which is applied in the direction of instruments, electrical digital data processing, data processing input/output process, etc. It can solve the problems of misjudgment and low accuracy of touch recognition, and achieve the effect of improving accuracy
Inactive Publication Date: 2012-02-08
GUANGDONG VTRON TECH CO LTD
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Problems solved by technology
However, when two or more adjacent touch points are relatively close together, due to the divergence of the bright spots emitted by the infrared rays captured by the camera, these touch points will be regarded as one touch point, which will cause misjudgment, especially During simultaneous operation by multiple people, the accuracy of touch recognition is low
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[0017] The technology of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0018] see figure 1 , figure 1 is a schematic structural diagram of the multi-touch display device in this embodiment.
[0019] Including: inline infrared laser light sources 106, 107, 108, 109 installed at the corners of the touch screen 101, infrared emitting modules 102, 103 and infrared receiving modules 104, 105 installed on the four sides of the touch screen 101, installed on Touch the infrared camera 110 on the back of the display screen 101, and the main control module 111;
[0020] Wherein, the main control module 111 is respectively connected with the infrared emitting modules 102, 103 and the infrared receiving modules 104, 105, the inline infrared laser light source 106, 107, 108, 109, and the infrared camera 110, and controls the infrared emission Operation of modules 102, 103, infrared receiving modules 104, 105, inl...
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The invention discloses a multi-point touch display screen device, comprising at least two horizontal 1-shaped infrared laser sources, infrared emission modules, infrared receiving modules, an infrared camera and a master control module, wherein the at least two horizontal 1-shaped infrared laser sources are arranged at corners of a touch display screen; the infrared receiving modules and the infrared receiving modules are arranged on four edges of the touch display screen; the infrared camera is arranged on the back face of the touch display screen; the master control module is respectively connected with the infrared emission modules, the infrared receiving modules, the horizontal 1-shaped infrared laser sources and the infrared camera and used for controlling the operation of the infrared emission modules, the infrared receiving modules, the horizontal 1-shaped infrared laser sources and the infrared camera; the horizontal 1-shaped infrared laser sources and the infrared camera work synchronously to shoot an image of the entire touch display screen, and the master control module is used for calculating the range of a touch point according to the image; the infrared emission modules and the infrared receiving modules are used for performing infrared scanning on the touch display screen to acquire dodging line information; and the master control module is used for calculating coordinates of intersection points of dodging lines and judging the coordinate of the touch point according to the coordinates of the intersection points of the dodging lines and the range of the touch point. According to the technology provided by the invention, multi-point touch can be performed effectively, and the phenomenon of false judgment caused by closer touch points is avoided.
Description
technical field [0001] The invention relates to touch screen technology, in particular to a multi-point touch screen device. Background technique [0002] Electronic touch technology provides great convenience for human-computer interaction, and also provides a variety of technical solutions, and the performance and reliability are constantly improving. A kind of touch device of infrared one-character laser light source appears on the market at present, because it can realize multi-point touch really, and can realize zero-pressure touch and widely acclaimed, as patent No. is the infrared one-character laser multi-point touch screen device disclosed by CN101770314A And the touch positioning method uses an infrared laser to form a layer of infrared plane on the surface of the touch screen. When objects such as fingers are close to the touch screen, the infrared rays on the infrared plane are reflected to form bright spots. The infrared camera captures these bright spots and tr...
Claims
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IPC IPC(8): G06F3/042
Inventor 彭昌辉钟杰婷
Owner GUANGDONG VTRON TECH CO LTD