Multipoint and object touch panel arrangement as well as multipoint touch orientation method

A multi-point touch screen and touch screen technology, which is applied to projection devices, printing devices, camera bodies, etc., can solve the problems of incorrect position reporting, difficulty in touch panel manufacturing process, high complexity of calculation circuits, and difficulty in reporting positions, etc.

Active Publication Date: 2008-07-30
SHENZHEN TIMELINK ECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with these touch screen technologies is that there is no ability to track multiple points of contact, and the position is not reported correctly when multiple touch points land on positions horizontal and vertical to the grid lines
But this kind of touch screen is only suitable for relatively small size. When the screen size is required to be large, the manufacturing process of the touch panel and the complexity of the control calculation circuit are very large, so it is difficult to report the position correctly when multi-touch

Method used

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  • Multipoint and object touch panel arrangement as well as multipoint touch orientation method
  • Multipoint and object touch panel arrangement as well as multipoint touch orientation method
  • Multipoint and object touch panel arrangement as well as multipoint touch orientation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Example 1. FIG. 1 is a schematic structural diagram of an embodiment of a multi-touch screen device of the present invention. The device includes: a touch screen 20 made of a highly transparent acrylic glass plate, and the four sides of the touch screen 20 are polished; a plurality of LEDs 22 that provide infrared light with a wavelength of 850nm; When an object touches the panel of the touch screen 20, the total reflection at the touch point is destroyed, and the infrared rays are scattered here to generate infrared imaging. A projection soft curtain 16 for displaying images is attached to the back of the acrylic glass plate 20, and the soft curtain 16 has good infrared transmission performance. The infrared camera 12 captures infrared reflection images presented on the acrylic plate 20 . The camera 12 is provided with an optical filter 10 corresponding to the wavelength of the infrared light emitted by the LED 22 and is 850nm light wave in front of the taking lens o...

Embodiment 2

[0109] Embodiment 2, referring to Fig. 13 . The difference between this embodiment and Embodiment 1 is that it also includes a layer of transparent and elastic silica gel 40, which is coated on the front of the touch panel 20, and the silica gel and the touch panel form a single total reflection layer; The projection soft screen 16 has the properties of being breathable and can block infrared rays from the outside, and it is placed on the above-mentioned silica gel layer 16 . Because the back side of the soft curtain 16 is rough, there will be an air layer between the silica gel film and the projection screen. Adhering to the silica gel layer 40, and because the silica gel layer 40 has a strong adsorption capacity, the air will be squeezed out from between the soft curtain 16 and the silica gel layer 40, thus destroying the total reflection and producing bright spots. When the pressure disappears, due to the elasticity of the silica gel layer 40, it will immediately return to...

Embodiment 3

[0110] Embodiment 3, see Fig. 5. The difference between this embodiment and Embodiment 1 is that the LED device providing infrared light is arranged on the back of the touch panel 20, and the infrared camera captures the reflected image of the infrared light from objects on the front of the touch screen.

[0111] The device in Embodiment 3 can identify the shape of the reflective infrared imaging pattern label attached to the touch object on the touch screen 20, that is, the sample of the infrared reflective imaging of the label that can be collected in advance, and match and compare it with the currently acquired reflective imaging of the touching object. To confirm what kind of touching object, as well as the coordinates and angle of the object, whether it is in motion and the direction of motion. and perform corresponding actions.

[0112] The infrared light source of the device in embodiment 3 is from the infrared emitting device 24 placed behind the acrylic glass plate 2...

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Abstract

The invention discloses a multipoint touch screen device and a positioning method for multipoint touch, which can identify two or more touch operations. The device comprises a touch panel, infrared LEDs, a projection flexible screen, an infrared camera, a projector, a controller and a computer execution command processor. The infrared LEDs are circumferentially arranged on the transparent touch panel to envelope all infrared lights based on the frustrated total internal reflection principle. When the panel is touched, the total reflection is destroyed and the infrared camera behind the panel can capture the bright spot. An infrared filter plate is placed before the infrared camera to filter off visible lights. The infrared camera collects a touch event and sends touch signals to the controller; the controller process the touch signals and sends the data of touch event and touch position to the computer software for explaining the touch and executes the operations based on the touch event.

Description

technical field [0001] The invention relates to a touch screen electronic device, in particular to a touch screen electronic device capable of distinguishing multiple touch points and operating simultaneously and a positioning method for multi-point touch. Background technique [0002] At present, touch screens have been widely used in various electronic devices. They are used to manipulate electronic devices to achieve various functions. Especially in computer application systems, touch screens are often used to replace the input control functions of keyboards and mice, and the interaction between people and equipment is realized by simply clicking the prompt graphics on the display screen with fingers or touch pens. Usually, a touch screen includes a transparent touch panel that covers the visible area of ​​the display screen, a controller and corresponding driver software. The touch panel records touch events and sends touch signals to the controller. The controller proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B17/54G03B29/00G06F3/041
CPCG06F2203/04109
Inventor 陈伟山
Owner SHENZHEN TIMELINK ECHNOLOGY CO LTD
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