Optical communication device and method for transmitting and receiving information

Abstract

An optical communication device and a method for transmitting and receiving information are disclosed. The optical communication device includes: at least two light sources including a first light source and a second light source; and a controller, which can drive the first light source and the second light source through at least two driving modes. The at least two driving modes comprise a firstdriving mode and a second driving mode. The first driving mode and the second driving mode have the same or different frequencies, and the device is used for transmitting first information when the first light source and the second light source are driven in the same driving mode. When the first light source and the second light source are driven in different driving modes, other information different from the first information is transmitted.

Description

technical field [0001] The present invention belongs to the field of optical information technology, and more specifically relates to an optical communication device (also referred to as an "optical tag" herein) and a method for transmitting and receiving information. Background technique [0002] Barcodes and QR codes have been widely adopted to encode information. When these barcodes and QR codes are scanned with specific equipment or software, the corresponding information will be recognized. However, the recognition distance of barcodes and QR codes is very limited. For example, for a two-dimensional code, when scanning it with a mobile phone camera, the mobile phone must be placed in a relatively close distance, which is usually only about 15 times the width of the two-dimensional code. Therefore, normal-sized barcodes and QR codes cannot be recognized at long distances. Long-distance identification can be achieved by customizing very large barcodes and QR codes, but...

AI Technical Summary

Problems solved by technology

Therefore, normal-sized barcodes and QR codes cannot be recognized at long distances

Long-distance identification can be achieved by customizing very large barcodes and QR codes, but this comes at a significant cost and in many cases is not possible due to various other constraints such as space constraints

[0003] Due to the limitation of the recognition distance of barcodes and QR codes, it is inconvenient in many application scenarios

For example, when scanning a posted QR code with a mobile phone to purchase a ticket or product, if there are too many people, people who are far away from the QR code will not be able to recognize the QR code through their mobile phones, and must wait for the person in front to leave. It is extremely time-consuming and inconvenient to approach the QR code for corresponding operations.

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