Infrared feedback reflection unit, manufacturing method thereof and wide screen optical touch panel
A reflective device and optical touch technology, applied in optics, measuring devices, optical components, etc., can solve the problems of not being able to reflect light, not being able to reflect light back to the light receiver, and the panel not being able to be made into a wide screen, so as to achieve simple manufacturing method, low-cost effect
Inactive Publication Date: 2010-12-08
3M INNOVATIVE PROPERTIES CO
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[0005] However, for a long time, this kind of optical touch panel using a small number of light emitters and receivers is limited by the fact that the light feedback reflective material cannot sufficiently and stably reflect light to the light receiver at a large incident angle, making the panel It cannot be made into a wide screen with a high aspect ratio; for example: for a wide screen with an aspect ratio of 16:9, the maximum incident angle of the light received by the feedback reflective material will exceed 60 degrees, so it is no longer possible to use it The amount of light reflected back to the light receiver, or even completely unable to reflect light
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[0026] The following are the preferred embodiments of the present invention, and are illustrated with diagrams, and there are component symbols in the diagrams to represent corresponding components.
[0027] figure 1 A widescreen optical touch panel 1 is shown having a working area surrounded by four edges. The two ends of the first edge 11 are respectively connected with the third edge 13 and the fourth edge 14 relative to the third edge, the second edge 12 is opposite to the first edge 11, and the two ends of the second edge 12 are also connected. It is connected to the third edge 13 and the fourth edge 14, and the first edge 11 and the second edge 12 are substantially perpendicular to the third edge 13 and the fourth edge 14; thus forming a substantially rectangular Work area. Two infrared detectors 21 , 22 are disposed near two ends of the first edge 11 . The infrared detectors 21 and 22 respectively include an LED capable of emitting infrared rays, which is a point lig...
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The invention relates an infrared feedback reflection unit used in a wide screen optical touch panel. The infrared feedback reflection unit comprises an infrared feedback reflection strip; the infrared feedback reflection strip is provided with a front surface, a back surface and a long shaft and is formed by a cubic angle feedback reflection structure which is provided with at least one first slot and at least two second slots and is positioned below the front surface; the first slot is vertical to the long shaft; and when the incidence angle of the infrared emitted towards the front surface is 0-60 degrees, the infrared feedback reflection strip reflects the infrared with needed reflected light quantity. The invention also relates to a method for manufacturing an infrared feedback reflection unit used in a wide screen optical touch panel, comprising the following steps: forming a cubic angle feedback reflector plate, wherein the formed cubic angle feedback reflector plate is provided with a front surface, a back surface, a first direction and a second direction, and the first direction is vertical to the second direction; and cutting the cubic angle feedback reflector plate into the infrared feedback reflection strip along the second direction. The invention also relates to a wide screen optical touch panel adopting the infrared feedback reflection unit.
Description
technical field [0001] The invention relates to an infrared feedback reflection device for a wide-screen optical touch panel and a manufacturing method of the device, as well as a wide-screen optical touch panel using the infrared feedback reflection device; An infrared feedback reflection device capable of providing a sufficient amount of infrared reflection on a panel and a manufacturing and application method of the device. Background technique [0002] The use of the touch panel is becoming more and more popular, and the area is developing toward a larger size. In the past, the aspect ratio of touch panels was mostly 4:3, but now the wide-screen panels of 16:9 are popular with everyone. [0003] Currently, there are types of touch panels including resistive touch panels, capacitive touch panels, and optical touch panels. Resistive touch panels were developed earlier and adopt a multi-layer stacked structure. The disadvantages are that the light transmittance is easily ...
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IPC IPC(8): G06F3/042G02B5/124G02B5/22G01B11/00G01D5/32
Inventor 伍乐民
Owner 3M INNOVATIVE PROPERTIES CO