Transflective LCD Pixel Sub-pixel Segmentation for Color Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional transflective liquid crystal display panels face challenges in achieving high chromaticity due to their simplicity in pixel structure.
Innovation Solution
The pixel structure is enhanced by incorporating sub-pixel segments with both transmission and reflection areas, each covered by a color filter, and auxiliary sub-pixels tailored to suit optical characteristics, with separate gate lines for electrical control, allowing for improved light filtering and color representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pixel structure is simplified, then the manufacturing process is easier, but the chromaticity (color quality) cannot be achieved
Solution Approach 1:
The pixel is divided into multiple sub-pixels (first sub-pixel and second sub-pixel) with different functional characteristics. The first sub-pixel is optimized for transmission area while the second sub-pixel is optimized for reflection area, allowing each segment to contribute to different aspects of color quality while maintaining overall structural manageability
Solution Approach 2:
Different regions within the pixel are assigned different properties: the transmission area uses a first color filter with specific optical characteristics, while the reflection area uses a second color filter with different characteristics. This local differentiation enables optimized color performance in each region without requiring complete structural complexity throughout the entire pixel
2Manufacturing precision
If more layers are added to control optical behavior, then the chromaticity improves, but the device complexity increases
Solution Approach 1:
The patent combines multiple functional elements into integrated structures: the color filters are integrated directly into the sub-pixel regions, the liquid crystal layer spans both sub-pixels, and the reflective layer is positioned to serve the reflection area while being controlled by the same device layer. This merging reduces the total number of separate layers while maintaining optical control capabilities
Solution Approach 2:
The device layer and liquid crystal layer serve multiple functions simultaneously: they control both the transmission and reflection areas, provide electrical control to both sub-pixels, and enable both transmissive and reflective modes of operation. This multi-functionality reduces the need for separate dedicated layers for each function
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 configuration significantly improves the viewing quality of transflective liquid crystal displays by enhancing color accuracy and representation through precise light filtering and control of the liquid crystal layer.
Implementation Method 1
filtering light encountering the first sub-pixel to provide the color associated with the sub-pixel segment
Implementation Method 2
goes through a liquid crystal layer, a color filter R and the upper substrate 20
Implementation Method 3
light encountering the reflection area goes through an upper substrate 20, the color filter R and the liquid crystal layer before it is reflected by a reflective layer 52
Data Source
AI summary
In a transflective liquid crystal display comprising a plurality of pixels, each is divided into three color sub-pixels in red, green and blue. Each of the color sub-pixels is further divided into a main sub-pixel and an auxiliary sub-pixel. The main sub-pixel comprises a transflective area and a reflective area. The auxiliary sub-pixel can be entirely transmissive, reflective or partially transmissive and reflective. The liquid crystal display further comprises a plurality of first gate lines for electrically controlling the main sub-pixels and a plurality of second gate lines for electrically controlling the auxiliary sub-pixels. The auxiliary sub-pixels may have a color filter for partially filtering light encountering the auxiliary sub-pixels according to the color of the color sub-pixels.