Maintenance circuit of display panel

Abstract

A maintenance circuit of a display panel. The display panel is separated into a plurality of corresponding sub-areas (X1-X8) by a plurality of source electrode driver integrated circuits, wherein each source electrode driver integrated circuit controls a sub-area; every four adjacent sub-areas form a group of sub-areas; each maintenance circuit unit comprises first maintenance lines (RP1, RP3), second maintenance lines (RP2, RP4), first computing amplifiers (OP1, OP3), second computing amplifiers (OP2, OP4) and a plurality of resistors (R1-R8, L1-L8), wherein the first maintenance lines and the second maintenance lines enclose the periphery of the corresponding group of sub-areas and are semicircular; an inverting input terminal of each computing amplifier is connected with an output terminal of the same; each computing amplifier is connected to the corresponding maintenance line; and the resistors (R1-R8, L1-L8) are selectively connected according to two sub-areas to be maintained in the group of sub-area, so that signals of the two sub-areas, output by the corresponding source electrode driver integrated circuits, are respectively led to non-inverting input terminals of the two computing amplifiers, and the signals output by the two computing amplifiers are fed back to the corresponding sub-areas.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to a display panel maintenance circuit. Background technique [0002] An open circuit is common in one or more column or row lines of a display panel such as a TFT LCD. In order to repair these breaks, the TFT LCD panel is provided with repair lines around its perimeter. When a broken wire is found at the final assembly of the panel, the repair wire routes its signal around the broken wire. [0003] figure 1 A schematic diagram of a conventional repair circuit using an operational amplifier to repair a TFT LCD panel is shown. [0004] figure 1 Take the breakpoint 2 appearing on the column line in the TFT LCD panel 1 as an example for illustration. Such as figure 1 As shown, a breakpoint 2 is found when the TFT LCD panel 1 is assembled, at which point a panel repair line 5 is required to reroute the signal to bypass the breakpoint 2. Specifically, in figure 1 In , the s...

AI Technical Summary

Problems solved by technology

If there are bad pixels in partition X1 and partition X2, you cannot repair the dead pixels in partition X1 and partition X2 at the same time

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