Driver Substrate Signal Stabilization for Special-Shaped Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The cutting process for creating special-shaped display panels often results in display abnormalities due to the removal of signal sources from driver units, which affects the display quality.
Innovation Solution
A device substrate is designed with a substrate and driver units that include pulldown, reset, and output elements, where the pulldown element receives a start or reset signal, and the output element receives a high-frequency clock signal, with connections between these elements to stabilize the gate driving signals and prevent display abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a large panel is cut to obtain a special-shaped display panel, then the cost of photomask is saved and manufacturing flexibility is improved, but signal sources of driver units are removed causing display abnormality
Solution Approach 1:
The patent applies preliminary action by pre-configuring the driver units with alternative signal paths and redundant signal sources before the cutting process. The driver units are designed with dual input capabilities (first start signal and reset signal) so that when the panel is cut and original signal sources are removed, the pre-established alternative paths ensure continuous proper operation without display abnormalities.
Solution Approach 2:
The patent changes the signal parameters by transforming the function of the first start signal line to receive reset signals after cutting. The driver units are configured to accept different signal types (start signals or reset signals) on the same input line, allowing the system to adapt to the post-cutting state while maintaining reliable operation.
2Reliability
If driver units are configured with multiple signal inputs and alternative paths, then display reliability after cutting is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the first start signal line to serve dual functions: receiving first start signals during normal operation and receiving reset signals after cutting. The driver units are configured with multi-functional input lines that can accept different signal types, reducing the need for separate dedicated lines for each function and thereby limiting the increase in device complexity.
Solution Approach 2:
The patent merges the first start signal line with the reset signal line functionality, allowing a single line to carry both types of signals at different operational stages. This consolidation approach maintains reliability by ensuring proper signal reception while avoiding the need for completely separate signal paths, thus controlling device complexity.
Data Source
AI summary
A device substrate including a substrate and 1st-stage to nth-stage driver units. Each of the 1st-stage to nth-stage driver units includes a pulldown element, a reset element, and an output element. A gate of the pulldown element is used for receiving a corresponding first start signal or a reset signal. A gate of the reset element is used for receiving the reset signal. A drain of the output element is used for outputting a corresponding gate driving signal. A gate of the pulldown element of the nth-stage driver unit is electrically connected with the gate of the reset element of the nth-stage driver unit so as to make the gate of the pulldown element of the nth-stage driver unit be used for receiving the reset signal.