Photoelectric selection signal control circuit, label display device, label display method and control device

Abstract

The invention discloses a photoelectric selection signal control circuit, the circuit comprises an input unit, a photosensitive unit, a comparison unit and an output unit, wherein the input unit is used for receiving a first voltage signal and a selection signal and outputting a first control signal; the photosensitive unit is used for outputting a second control signal according to an illumination signal and the first control signal; the comparison unit is used for comparing the second control signal and the second voltage signal and outputting a comparison result signal; and the output unitis used for outputting an output signal according to the comparison result signal. The invention also discloses a label display device, a label display method, a control device and a label display system.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to a photoelectric selection signal control circuit, a label display device and method, and a control device. Background technique [0002] The use of electronic tags eliminates the need for paper tags in supermarket retailing, and changes in product content, prices, and other information can be completed through servers and wireless access points (APs). The use of bar screen electronic labels can save the cost of electronic labels. One bar screen can display the label content of multiple commodities, such as figure 1 shown. However, there should be a one-to-one correspondence between the label displayed on the bar screen and the product placed at that position, and the position of the product is often adjusted, so the position of the label on the bar screen needs to be adjusted from time to time. [0003] Existing methods include the use of touch screens, including capacitive to...

AI Technical Summary

Problems solved by technology

However, in order to avoid misoperation and other personnel operations, this method requires additional authentication information and authentication systems, and the system cost is relatively high.

In addition, infrared and bluetooth remote controllers are also used in the prior art. This method requires the remote controller to have multiple selection buttons, which is complicated to operate, has a high error rate, and is difficult to save operation records, which is not conducive to management.

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