Gate Driving Circuit Repair Block for Display Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gate driving circuits in display devices face issues with defective signal transmitters, which affect the entire gate-in-panel (GIP) due to cascaded connections, leading to increased bezel size and reduced yield due to numerous welding points required for repair.
Innovation Solution
A gate driving circuit with a repair line and repair block that allows for the output of repair signals to replace defective gate and carry signals, minimizing the number of welding points and reducing bezel size by enabling on-the-fly repair of defective signal transmitters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dummy signal transmitters are inserted for every predetermined number of signal transmitters to repair defective transmitters, then the defect of signal transmitters can be addressed, but the bezel size increases and the number of welding points increases reducing yield
Solution Approach 1:
The patent combines the repair function with the existing signal transmitter structure by integrating a repair block into the n-th signal transmitter. The repair block shares the same output nodes (first output node for gate signal, second output node for carry signal) as the normal signal transmitter, eliminating the need for separate dummy transmitters and reducing bezel size while maintaining repair capability.
Solution Approach 2:
The n-th signal transmitter is designed with dual functionality: it can operate as a normal signal transmitter when functioning correctly, and it can be transformed into a repair unit when defective by receiving repair signals through the repair line. The repair block enables the transmitter to output repair gate signals and repair carry signals through the same output nodes, making the structure universally applicable for both normal operation and defect repair.
2Reliability
If dummy signal transmitters are inserted for every predetermined number of signal transmitters to repair defective transmitters, then the defect of signal transmitters can be addressed, but the number of welding points increases reducing yield
Solution Approach 1:
The patent merges the repair functionality into the existing signal transmitter framework by adding a repair block that shares output nodes with the normal signal transmitter. This integration eliminates the need for separate dummy transmitter structures and their associated welding points, reducing manufacturing complexity while maintaining repair capability.
Solution Approach 2:
The repair line acts as an intermediary that can selectively activate the repair block in defective signal transmitters. By using this intermediary repair signal line, the system can repair defects without requiring physical dummy transmitter structures, thereby reducing the number of welding points needed while maintaining the ability to repair signal transmitter defects.
3Ease of manufacture
If a repair block is integrated into the n-th signal transmitter sharing output nodes, then the number of welding points is minimized and bezel size is reduced, but the circuit complexity of the signal transmitter increases
Solution Approach 1:
The repair block incorporates dynamic switching mechanisms using repair control signals to selectively activate or deactivate repair functions. The first repair switching element controls the repair gate signal output, and the second repair switching element controls the repair carry signal output. This dynamic control allows the circuit to adapt between normal operation and repair mode, managing complexity through controlled variability rather than static redundancy.
Solution Approach 2:
The repair block is designed to be self-contained within the n-th signal transmitter, using the transmitter's own output nodes and control structures. The repair block autonomously generates repair gate signals and repair carry signals based on repair control signals received through the repair line, eliminating the need for external repair circuitry and reducing overall system complexity despite the added internal components.
Data Source
AI summary
A gate driving circuit and a display device including the same are disclosed. The gate driving circuit includes a plurality of signal transmitters which are cascade-connected via a carry line to which a carry signal is applied from a previous signal transmitter, and a repair line connected to the plurality of signal transmitters, wherein a signal transmitter includes a circuit part to receive the carry signal from the previous signal transmitter, and charge or discharge a first control node and a second control node, an output part to output a gate signal and a carry signal based on potentials of the first control node and the second control node, and a repair block connected to the repair line and to output a repair gate signal replacing the gate signal and a repair carry signal replacing the carry signal when a logic signal is applied from the repair line.