Display Driver Crack Resistance Measurement Circuit
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Solution Overview
Problem
Flexible display panels, which are bendable and foldable, face issues with cracks when bent, leading to defects that existing technologies struggle to effectively detect and measure, impacting their reliability and durability.
Innovation Solution
A display driver with a crack resistance measurement circuit that includes a reference resistance generation circuit, comparator, and circuit controller, which generates a reference resistance and compares it with the panel's crack resistance to determine if a crack has occurred, using a series of resistors and switches to adjust the reference resistance based on the comparison results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible display panels are bent to achieve flexibility, then the display can be folded and bent into various shapes, but cracks occur in the display panel
Solution Approach 1:
The patent applies preliminary action by incorporating a crack resistance measurement circuit into the display driver before the display panel is put into service. This circuit proactively monitors the integrity of the flexible display panel by continuously measuring resistance values across the panel, detecting cracks before they compromise the display's reliability. The measurement circuit is integrated during manufacturing, enabling ongoing assessment of the panel's structural integrity as it undergoes bending and folding operations.
2Reliability
If existing detection methods are used, then the display panel can be monitored, but they struggle to effectively detect and measure cracks
Solution Approach 1:
The patent replaces mechanical or visual inspection methods with an electrical resistance-based detection system. The crack resistance measurement circuit uses electrical resistance measurements to detect cracks in the flexible display panel. By measuring changes in resistance values across the panel, the circuit can precisely identify the presence, location, and severity of cracks without requiring physical contact or complex imaging systems.
Solution Approach 2:
The patent introduces an intermediary measurement circuit as a mediator between the display panel and the detection system. This crack resistance measurement circuit serves as an intermediary that translates physical crack conditions into measurable electrical resistance values. The circuit includes measurement lines that extend across the display panel, acting as intermediaries that convey information about panel integrity to the control logic for analysis and defect identification.
3Measurement precision
If a crack resistance measurement circuit is integrated into the display driver, then crack detection capability is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the crack resistance measurement circuit to share resources with other display driver functions. The measurement circuit utilizes existing display panel structures, such as data lines and pixel electrodes, for its measurements rather than requiring entirely separate dedicated components. This multi-functional approach allows the same hardware infrastructure to serve both display driving and crack detection purposes, reducing overall device complexity while maintaining measurement precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for accurate detection of cracks in flexible display panels, improving the reliability and durability by enabling quick and precise measurement of crack resistance, thereby identifying defects and ensuring the panel's integrity.
Implementation Method 1
a comparator configured to compare a magnitude of the crack resistance with a magnitude of the reference resistance and output a resistance comparison result
Data Source
AI summary
A display driver including a crack resistance measurement circuit according to one embodiment of the present disclosure includes a crack resistance measurement circuit connected to a crack resistance circuit of a display panel to measure a crack resistance of the crack resistance circuit, wherein the crack resistance measurement circuit includes a reference resistance generation circuit configured to generate a reference resistance using at least two resistors connected in series and at least two switches connected to correspond to the at least two resistors, a comparator configured to compare a magnitude of the crack resistance with a magnitude of the reference resistance and output a resistance comparison result, and a circuit controller configured to output a reference resistance control signal for controlling the at least two switches according to the resistance comparison result.