Segmented Peripheral Wiring for Electrophoretic Display Inspection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In electrophoretic display apparatuses, damaged wires in the TFT array substrate cannot be determined by observing microcapsules from the rear surface of the glass substrate due to a continuous annular metal electrode intervening between the display element layer and the glass substrate, obstructing visibility.
Innovation Solution
A display apparatus design featuring a light-permeable substrate with dummy pixels, a peripheral wiring layer, and a display element layer, where the peripheral wiring layer and dummy pattern controlling layers are spaced apart by a gap, allowing light to reflect from the display element layer to the substrate, enabling observation of microcapsule colors from the rear surface to identify damage locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous annular metal electrode is disposed under the outmost annular zone to control microcapsules and form a visual frame, then the display quality and frame continuity are improved, but the metal electrode intervenes between the display element layer and the glass substrate, blocking the observation of microcapsule colors from the rear surface, which worsens the detectability of wire damage
Solution Approach 1:
The continuous annular metal electrode is segmented into multiple separate metal electrodes arranged in an annular pattern. This segmentation allows light to pass through the gaps between the metal electrodes, enabling observation of microcapsule colors from the rear surface to detect wire damage, while still maintaining the ability to control microcapsules in the outmost annular zone to form a visual frame.
2Device complexity
If the peripheral wiring layer is positioned close to the dummy pixels to reduce device complexity, then the structure is simplified, but the display element layer cannot be observed from the rear surface for damage detection
Solution Approach 1:
A gap is introduced as an intermediary space between the peripheral wiring layer and the dummy pixels. This gap allows light to pass through and reflect off the display element layer, enabling observation from the rear surface for damage detection, while the peripheral wiring layer remains positioned to control the dummy pixels and form a visual frame.
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
Enables the detection of damage locations by observing abnormal colors of microcapsules, facilitating the identification and diagnosis of issues within the display apparatus.
Implementation Method 1
the gap allows a light to be reflected from the display element layer to the light permeable substrate
Data Source
AI summary
A display apparatus includes a light permeable substrate, dummy pixels, a peripheral wiring layer and a display element layer. The dummy pixels are disposed on the light permeable substrate. Each of the dummy pixels includes a dummy pattern controlling layer. The peripheral wiring layer is disposed on the light permeable substrate for applying voltages having the same polarity to the dummy pattern controlling layers. The display element layer covers the light permeable substrate and the dummy pixels. The peripheral wiring layer and the dummy pattern controlling layer are spaced apart by a gap. The gap allows light to be reflected from the display element layer to the light permeable substrate.