Transflective Display Device with Anti-Reflective Layer
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Solution Overview
Problem
Existing transflective display devices face challenges in process yield due to the difficulty in forming uniform bump structures and in simultaneously achieving improved optical performance in both reflective and transmissive areas, as they require different signal drives.
Innovation Solution
A display device design incorporating a transmissive area and a reflective area with independent transistor drivers and an anti-reflective layer, which reduces the complexity of forming bump structures and allows for improved optical performance by using an anti-reflective layer with haze or a combination of an anti-reflective layer and a diffusion layer with haze.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bump structures are provided in the reflective area to adjust reflectivity and liquid crystal cell gaps, then optical performance is improved, but the formation process becomes difficult and process yield decreases
Solution Approach 1:
The patent removes the complex bump structure from the reflective area and replaces it with a planar reflective layer. This extraction of the problematic feature simplifies the manufacturing process while maintaining the essential optical function through the anti-reflective layer positioned on the liquid crystal module surface.
Solution Approach 2:
The anti-reflective layer serves as an intermediary element that replaces the bump structure's optical adjustment function. Positioned between the reflective layer and the liquid crystal module, it provides the necessary optical performance without requiring complex underlying bump structures.
2Reliability
If bump structures are provided in the reflective area to adjust liquid crystal cell gaps, then optical performance is improved, but the size uniformity of bumps is difficult to control, affecting process yield
Solution Approach 1:
The patent eliminates the bump structure entirely from the reflective area, replacing it with a flat reflective layer. This removes the source of size uniformity problems while maintaining optical performance through the anti-reflective layer.
Solution Approach 2:
The patent changes the geometric parameter of the reflective area from three-dimensional bumps to a two-dimensional planar surface. This parameter change simplifies manufacturing precision requirements while achieving the same optical effect through the anti-reflective layer.
3Device complexity
If the same signal is used to drive sub-pixels in both reflective and transmissive areas, then device complexity is reduced, but optical performance cannot be simultaneously optimized in both areas
Solution Approach 1:
The patent segments the display into reflective and transmissive areas with independent transistor drivers. This segmentation allows each area to have optimized signal driving for its specific optical performance requirements, while the overall device structure remains relatively simple.
Solution Approach 2:
The patent applies local quality by providing independent transistor drivers for reflective and transmissive areas. Each area receives customized signal driving tailored to its specific optical characteristics, enabling simultaneous optimization of both areas' optical performance.
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
The design enhances process yield and optical performance by simplifying the formation process and ensuring improved brightness distribution across various viewing angles, providing consumers with an enhanced visual experience without the need for multiple bump structures.
Implementation Method 1
The anti-reflective layer is disposed on the liquid crystal module
Implementation Method 2
a diffusion layer with haze
Data Source
AI summary
A display device has a transmissive area and a reflective area. The transmissive area corresponds to a first sub-pixel, and the reflective area corresponds to a second sub-pixel. The display device includes a backlight module, a liquid crystal module, and an anti-reflective layer. The liquid crystal module is disposed on the backlight module and includes a first substrate, a component layer, and a reflective layer. The component layer is disposed on the first substrate and includes a first transistor and a second transistor. The first transistor is configured to drive the first sub-pixel, and the second transistor is configured to drive the second sub-pixel. The reflective layer is disposed on the component layer and corresponds to the reflective area. The anti-reflective layer is disposed on the liquid crystal module.