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Apparatus and method for determining and controlling performance of pre-charge operations in electronic shelf label (ESL) system

An electronic shelf label and pre-charging technology, applied to instruments, static indicators, etc., can solve problems such as power waste

Pending Publication Date: 2021-07-23
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the execution of the pre-charging operation can be more flexibly and intelligently controlled, and the problem of power waste can be solved

Method used

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  • Apparatus and method for determining and controlling performance of pre-charge operations in electronic shelf label (ESL) system
  • Apparatus and method for determining and controlling performance of pre-charge operations in electronic shelf label (ESL) system
  • Apparatus and method for determining and controlling performance of pre-charge operations in electronic shelf label (ESL) system

Examples

Experimental program
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Effect test

no. 1 example

[0075] According to the first embodiment of the present invention, the precharge judging circuit 150 can take the source lines SL(0)-SL(M) as a group for calculating the number of voltage transitions to be generated on the source lines, and then according to the judgment As a result, the execution of the precharge operation of all the source lines SL(0)˜SL(M) during a predetermined line rest is controlled.

[0076] Assuming that the source driver 110 is coupled to the first number of source lines, the precharge determination circuit 150 determines whether the precharge operation is required for the second number of source lines. In a first embodiment of the invention, the first number is equal to the second number. For example, in figure 1 In the illustrated embodiment, the first number is (M+1).

[0077] More specifically, in the first embodiment of the present invention, the precharge judging circuit 150 can calculate the voltages of (M+1) source lines when the source line...

no. 2 example

[0081] According to the second embodiment of the present invention, the precharge judging circuit 150 can divide the source lines SL(0)˜SL(M) into a plurality of groups, and calculate for each group when the source lines are based on a predetermined line (n) When the corresponding voltage is programmed, how many of the source lines contained in the group will produce a predetermined voltage transition, and according to the calculation results, it is judged for each group whether it is necessary to During the rest period of (n), a precharge operation is performed on the source lines included in the group.

[0082] Then, the pre-charging judging circuit 150 can respectively control the execution of the pre-charging operation of each group during the rest period of the predetermined line (n) according to the judgment result of each group. That is, the precharge determination circuit 150 can independently control the execution of the precharge operation of the source lines include...

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Abstract

An apparatus for driving a display module of an electronic shelf label system includes a source driver and a pre-charge determination circuit. The source driver is coupled to a plurality of source lines for providing a plurality of data signals to the source lines. The pre-charge determination circuit is coupled to the source driver for determining whether a pre-charge operation of the source line is needed during a rest period of the first source line according to a number of voltage transitions to be generated at the source line. The pre-charge determination circuit determines that a pre-charge operation of the source line is required during a rest period of the first source line when the number of voltage transitions to occur at the source line exceeds a predetermined threshold value.

Description

【Technical field】 [0001] The present invention relates to the automatic judgment and control of the pre-charging operation in the electronic shelf label (Electronic Shelf Label, abbreviated as ESL) system, in particular to a method and method for automatically judging and controlling the pre-charging operation of the source line in the ESL system. device. 【Background technique】 [0002] Retailers typically use Electronic Shelf Label (ESL) systems to display the prices of items on their shelves. The displayed commodity prices are automatically updated whenever prices are changed by the central control server. Generally, the electronic display module is positioned on the front edge of the retail shelf. [0003] The ESL module uses electronic paper (electronic paper, abbreviated as E-paper) or liquid crystal display (liquid-crystal display, abbreviated as LCD) to display current commodity prices for consumers. Electronic paper is widely used in ESL systems because it can pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34
CPCG09G3/344G09G2330/021G09G2380/04G09G2310/0248G09G2320/0252G09G2330/024
Inventor 徐光荣许晋
Owner HIMAX TECH LTD
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