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A method and device for transmitting/acquiring information using visible light signals

A visible light and signal technology, applied in the field of visible light communication, can solve the problems of stripe width uncertainty, disappearance, and affecting stripes, etc., and achieve the effect of fast and more accurate transmission/acquisition

Active Publication Date: 2015-10-14
BEIJING G WEARABLES INFORMATION SCI & TECH
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  • Claims
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Problems solved by technology

[0004] However, this method has the following drawbacks: local overexposure of the image sensor may affect the width of the stripes, for example, in the overexposed area, the stripes may become narrow or even disappear, resulting in failure of image analysis and decoding; and different background lighting conditions may Causes uncertainty in measuring stripe width
[0005] Furthermore, photosensitive devices used in such VLC must be specially designed to detect visible light, and thus, can only be applied in limited scenarios
Also, although commercially available mobile devices (e.g., smartphones, tablets, PDAs) have light-sensitive components, such as image sensors, they are not suitable for such high-frequency blinking signals

Method used

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  • A method and device for transmitting/acquiring information using visible light signals
  • A method and device for transmitting/acquiring information using visible light signals
  • A method and device for transmitting/acquiring information using visible light signals

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Embodiment Construction

[0083] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0084] According to a first aspect of the present invention there is provided a method of transmitting information using a visible light signal from a light source. figure 1 is a flowchart of a method 100 for transmitting information using a visible light signal from a light source according to an exemplary embodiment of the present invention.

[0085] like figure 1 As shown, the method 100 starts at step 110, based on the informa...

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Abstract

The invention discloses a method and a device for transmitting / acquiring information by visible light. The method includes modulating two or more driving signals of a light source based on information to be transmitted so as to acquire two or more modulated driving signals used for driving the light source to emit visible light signals in two or more wavelengths, wherein the level of the modulated driving signals varies between the high level and the low level at different frequencies and / or different phases and / or different amplitudes; emitting the visible light signals in the two or more wavelengths so as to transmit the information on the basis of the two or more modulated driving signals, wherein the level of the visible light signals varies between the high level and the low level at different frequencies and / or different phases and / or different amplitudes, and the information corresponds to color striped patterns displayed in acquired images of the visible light signals.

Description

technical field [0001] The present invention relates to the field of visible light communication, in particular to a method and device for transmitting / obtaining information by using visible light signals. Background technique [0002] Visible light communication is a communication technology that uses changes in visible light (color, intensity or position) to transmit information. This communication technology for transmitting information is based on light signals that flash at high frequencies. Specifically, the information to be transmitted is first encoded into a digital signal; then the digital signal is used to modulate the duration or frequency of the driving current or driving voltage of the light source, so that the light source flickers at high frequency. This high-frequency flicker signal can be detected by a photosensitive device, such as an image sensor, and recovered as transmitted information. The main advantages of this visible light transmission technology...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/243H04B10/11H04N23/76
CPCH04B10/116
Inventor 郭成胡洪
Owner BEIJING G WEARABLES INFORMATION SCI & TECH
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