Transflective LCD Panel Electrode Structure for Brightness and Energy
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Solution Overview
Problem
Transflective liquid crystal displays face challenges in achieving high brightness with low energy consumption and maintaining image visibility in both bright and dark environments, as existing technologies either consume high energy or rely on external light sources.
Innovation Solution
A transflective liquid crystal display panel design with a single cell thickness, utilizing a new electrode structure featuring alternately arranged reflective and transmissive regions, where a common electrode with alternating reflective layers functions as both a reflective layer and pixel electrode, made of opaque metal to reduce resistance and simplify manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transmissive type liquid crystal display uses a backlight as the light source, then it can display a bright image in a dark environment, but the utilization rate of the backlight is low and energy consumption is high
Solution Approach 1:
The display panel is segmented into transmissive regions and reflective regions at the pixel level. Each pixel contains both types of regions, allowing selective use of backlight or ambient light based on the region, thereby improving overall light utilization efficiency and reducing energy consumption.
Solution Approach 2:
Different regions of the pixel are assigned different optical properties - transmissive regions allow backlight passage while reflective regions reflect ambient light. This local differentiation enables the display to adapt to different lighting environments and improves overall energy efficiency by using ambient light where available.
2Use of energy by moving object
If a reflective type liquid crystal display uses front light or exterior light as the light source, then it has relatively low energy consumption, but it cannot display an image in a dark environment
Solution Approach 1:
The pixel structure is segmented into transmissive and reflective sub-regions, enabling the display to use reflective regions for ambient light conditions (low power consumption) and transmissive regions for dark environment conditions (backlight activation), thus achieving both low energy consumption and environmental adaptability.
Solution Approach 2:
Each pixel is designed with dual functionality - it can operate in reflective mode using ambient light or in transmissive mode using backlight. This multi-functionality allows the display to adapt to various lighting environments while maintaining energy efficiency by selecting the appropriate mode.
3Adaptability or versatility
If a transflective liquid crystal display combines transmissive and reflective regions on the array substrate, then it can display a bright image in a dark environment and can be used indoor or outdoor, but the manufacturing process becomes complex
Solution Approach 1:
The transmissive and reflective electrode structures are merged into a single integrated design on the array substrate. By sharing common electrodes and integrating both functional regions in one layer structure, the manufacturing process is simplified while maintaining the transflective display's environmental adaptability.
Solution Approach 2:
The array substrate is designed with universal electrode structures that serve both transmissive and reflective functions. This multi-functional design eliminates the need for separate manufacturing processes for different region types, reducing overall manufacturing complexity while preserving environmental adaptability.
4Illumination intensity
If transparent electrodes are used in the transmissive region to facilitate light transmission, then light can transmit through the liquid crystal layer, but the electrode resistance increases
Solution Approach 1:
The electrode material is selected with local quality considerations - transparent conducting oxides are used where light transmittance is critical, while their thickness and composition are optimized to minimize resistance. This local optimization balances optical performance with electrical performance in the transmissive regions.
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 achieves a transflective display effect with reduced manufacturing complexity, improved operational efficiency, and enhanced transmittance, allowing for bright image display in various lighting conditions while minimizing energy consumption.
Implementation Method 1
metal or other materials with excellent reflective properties is disposed on the array substrate as a reflective region, suitable for reflecting the light from the front light or the exterior light
Implementation Method 2
a liquid crystal display panel is generally constituted by cell assembling a color filter substrate and an array substrate with a liquid crystal layer sealed therebetween
Data Source
AI summary
A transflective liquid crystal display panel and a liquid crystal display device are provided. The transflective liquid crystal display panel comprises a first substrate (100), a second substrate (200) opposed to the first substrate (100), and a liquid crystal layer disposed between the first substrate (100) and the second substrate (200); the first substrate (100) and the second substrate (200) comprise a plurality of sub-pixels, and each of the sub-pixels comprises a reflective region and a transmissive region; a common electrode (202) is provided on the second substrate (200) corresponding to an entirety of the transmissive region and the reflective region, a reflective layer is provided at a side of the common electrode close to the first substrate (100) and at a portion corresponding to the reflective region; and the reflective layer comprises a first reflective layer (2041) which is configured as a reflective layer and pixel electrode and a second reflective layer (2042) is configured only to reflect light.