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Interactive display device and method in interactive display device

A display device, interactive technology, applied in the input/output process of data processing, instruments, electrical digital data processing and other directions, can solve problems such as change

Active Publication Date: 2017-02-15
MULTITOUCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, photorecognition of touch suffers from illumination-related changes in the environment

Method used

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  • Interactive display device and method in interactive display device
  • Interactive display device and method in interactive display device
  • Interactive display device and method in interactive display device

Examples

Experimental program
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Embodiment Construction

[0041] In the following description, similar symbols refer to similar elements.

[0042] In the following examples of various embodiments of the present invention, an LCD screen is used as an example of an image layer. The LCD screen may include a film that forms a visible image, and optionally other elements such as backlighting, infrared (IR) lighting, IR intensity detection entering through the screen, and / or one or more LEDs for outputting sound. speaker. It will be appreciated that the invention could equally be also equipped with any other type of image layer, or screen for simpler presentation. Generally, an image layer is any means used to produce a visible image for a user, such as an electric display, a screen displaying a projected image, or a substance carrying a printed, dyed or woven image. However, the image layer should be sufficiently transparent or translucent to the IR light used to detect pointing objects through the image layer, as will be explained in m...

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PUM

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Abstract

An interactive display device (100) has an image layer (102) for presenting perceptible visual content to a user, and a touch surface (101) covering or formed by the image layer (102). Furthermore, there are multiple invisible light sources (110) for alternately illuminating different sub-regions of the touch surface (101), and multiple touch detection units for capturing images of the illuminated sub-regions from behind the image layer (102) (107). From the captured image, it is detected that the pointing object (112) touches the touch surface and thus correspondingly causes one or more marked contact areas in the captured image. The remaining ones of the invisible light sources (110) are controlled to be operable while adjacent touch detection units and associated invisible light sources are controlled to be inoperable, thereby reducing undesired reflections of invisible light from non-contact objects near the touch surface.

Description

technical field [0001] The present invention generally relates to an interactive display. Background technique [0002] There are interactive displays that include, for example, projectors or liquid crystal display (LCD) panels that form images on the surface, cameras or other light detectors behind the surface, and computer vision circuitry to detect user input. [0003] There are many different techniques for optical multi-touch detection. Many of these techniques are described in the publication "ThinSight: Versatile Muti-touch Sensing for Thin Form-factor Displays" by Steve Hodges, Shahram Izadi, Alex Butler, Alban Rrustemi, and Bill Buxton, see http: / / www.billbuxton .com / UISTthinSight.pdf. Optical touch detection is advantageous for a number of reasons, including the ability to detect multiple touch points or areas on the display. However, optical recognition of touch suffers from illumination-related changes in the environment. Typically, infrared (IR) light is use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042G06V10/10
CPCG06F3/0425G06F3/03G06F3/0304G06F3/0354G06F3/0412G06T7/00
Inventor T·伊尔莫南
Owner MULTITOUCH