Method for displaying four-gray-scale colors on an electronic price tag

Abstract

The invention provides a method for displaying four-gray-scale colors on an electronic price tag, which comprises the following steps: S1, configuring a random access memory, respectively configuringdata in a first data area and a second data area according to a display principle, each group of data combination representing one color including black, black gray, white gray and white; S2, drivingthe random access memory by utilizing a four-gray-scale voltage waveform, and displaying the electronic price tag as black when the voltage bit of the display area comprises four positive driving voltage values which are mutually spaced; When the voltage bit of the display area comprises two positive driving voltage values which are spaced from each other, the electronic price tag is displayed tobe black gray; When the voltage bit of the display area comprises a positive driving voltage value, the electronic price tag is displayed to be white gray; And when the voltage bit of the display areacomprises four negative driving voltage values which are arranged at intervals, the electronic price tag is displayed to be white. The electronic price tag disclosed by the invention displays four colors of black, black grey, white grey and white, and is more convenient for a user to identify.

Description

technical field [0001] The invention relates to the technical field of electronic paper, in particular to a method for displaying four-gray-scale colors on an electronic price tag. Background technique [0002] Electronic paper is a display screen made using electrophoretic display technology. It can be used as an electronic price tag to display commodity prices and names. It achieves the effect of displaying images by continuously applying voltage waveforms to each pixel point through a driving IC. The existing two-color electronic price tag encapsulates black and white charged particles in the same capsule structure, and the ups and downs of black and white particles with different charges are controlled by an external electric field to show the display effect of black and white, but in some occasions Electronic price tags are required to provide a grayscale display effect, but the current electronic price tags can only display black and white two-color. The existing drivi...

AI Technical Summary

Problems solved by technology

The existing two-color electronic price tag encapsulates black and white charged particles in the same capsule structure, and the ups and downs of black and white particles with different charges are controlled by an external electric field to show the display effect of black and white, but in some occasions Electronic price tags are required to provide a grayscale display effect, but the current electronic price tags can only display black and white two-color. The existing driving voltage waveforms for displaying black and white two-color are as follows figure 1 As shown, the voltage waveform includes a voltage balance area, a blinking area, and a display area in sequence. The voltage balance area includes two sets of signal intervals, namely Group1 and Group2. The flickering area includes a set of signal intervals, namely Group3. The flickering area needs to cycle twice, and the display area Including two groups of signal intervals, namely Group4 and Group5, each group of signal intervals includes four voltage positions, and the voltage of the voltage positions has three forms, which are the positive driving voltage value, 0V and negative driving voltage value of the voltage waveform; when the display area When the voltage position in the display area includes 4 positive driving voltage values ​​spaced apart from each other, the electronic price tag is displayed in black; when the voltage position in the display area includes 4 negative driving voltage values ​​spaced apart from each other, the electronic price tag is displayed in white; but When only black and white are displayed, the contrast between the displayed content in the electronic price tag is not strong enough, and it is difficult for users to recognize it. Therefore, it is necessary to improve the display method of the existing electronic price tag

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