Transflective LCD Electrode Overlap Design
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Solution Overview
Problem
The manufacturing process for transflective LCDs often damages the reflecting electrode due to differences in material properties between reflecting and light-transmissible electrodes, leading to structural issues like tilts, cracks, and reduced yield rates.
Innovation Solution
A liquid crystal driving electrode design where the light-transmissible electrode overlaps the reflecting electrode, creating a mechanical structure that restricts displacement and protects the reflecting electrode from damage during manufacturing, thereby preventing tilts and cracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If different manufacturing processes are used to form reflecting electrode and light-transmissible electrode, then each electrode can be optimized for its specific material properties, but the sequential manufacturing process inevitably damages the previously formed electrode
Solution Approach 1:
The patent combines the forming of reflecting electrode and light-transmissible electrode into a single manufacturing process step. By depositing both electrodes simultaneously or in a non-damaging sequence, the patent eliminates the need for sequential processing that causes damage to the reflecting electrode structure.
Solution Approach 2:
The patent applies preliminary protective measures by forming a protective layer or using a deposition method that prevents damage to the reflecting electrode before the light-transmissible electrode is formed. This preliminary action prevents subsequent manufacturing steps from harming the reflecting electrode structure.
2Ease of manufacture
If cleaning and surfacing steps are performed during manufacturing, then the light-transmissible electrode can be properly formed, but the reflecting electrode structure is damaged
Solution Approach 1:
The patent applies different surface treatment characteristics to different regions. The light-transmissible electrode receives full cleaning and surfacing treatment, while the reflecting electrode is protected from these damaging processes. This local differentiation allows each electrode to receive the specific treatment it needs without compromising the other.
Solution Approach 2:
The patent introduces an intermediary protective layer or deposition method that allows cleaning and surfacing steps to be performed on the light-transmissible electrode without directly exposing or damaging the reflecting electrode. This intermediary layer acts as a barrier that protects the reflecting electrode structure during necessary cleaning operations.
3Ease of manufacture
If the reflecting electrode is exposed to developing agent and stripper multiple times, then the light-transmissible electrode can be formed, but the adhesive between layers is harmed and cracks occur
Solution Approach 1:
The patent merges the formation of both electrodes into a process where the reflecting electrode is not exposed to multiple cleaning and developing steps. By forming both electrodes in a coordinated manner, the patent eliminates the cumulative damage from repeated exposure to developing agents and strippers that would otherwise harm the adhesive bonding.
Solution Approach 2:
The patent applies beforehand cushioning by using a protective deposition method or protective layer that shields the reflecting electrode and its adhesive bonding from the harmful effects of multiple cleaning and developing steps. This protective measure is applied in advance to prevent adhesive degradation and crack formation.
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 design enhances the endurance and yield rate of the reflecting electrode layer by minimizing damage during the manufacturing process, ensuring better structural integrity and reflecting performance.
Implementation Method 1
The reflecting electrode 30 generates the light by reflecting an exterior light source or an ambient light
Implementation Method 2
the light-transmissible electrode 50 generates the light by using backlight
Implementation Method 3
Alignment behavior of the liquid crystal molecule may be controlled by changing the field between the liquid crystal driving electrode and the biased electrode
Data Source
AI summary
A liquid crystal driving electrode and a liquid crystal display using the same are provided. The liquid crystal driving electrode includes a substrate, a reflecting electrode layer, and a light-transmissible electrode. The substrate includes a plurality of pixels; each pixel has a reflection area and a transmission area adjacent to the reflection area. The reflecting electrode overlaps the reflecting area while the light-transmissible electrode overlaps the transmission area. The reflecting electrode has an effective margin. The light-transmissible electrode electrically connects to the reflecting electrode and extends to overlap the effective margin.