Transflective Display Panel Light Efficiency via Region Segmentation
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Solution Overview
Problem
In transflective LCD panels, a significant amount of light is wasted due to the polarizer, leading to reduced light source utilization and increased power consumption, as light passes through the polarizer twice, resulting in only 20% of the backlight's light reaching the reflective layer after reflection.
Innovation Solution
The display panel design includes a first polarizer in the transmissive region and a reflective unit in the reflective region, both in the same layer, with optional supplementary layers and reflective layers positioned to minimize light loss, allowing light to be reused without passing through the polarizer twice, and using materials like aluminum or silver for reflective layers and anisotropic film polarizers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a polarizer is provided in the reflective region to enable light reflection, then the display can achieve transflective functionality, but light is wasted because the polarizer absorbs 80% of the light passing through it twice
Solution Approach 1:
The display panel is divided into two distinct regions: a transmissive region with a polarizer for light transmission and a reflective region without a polarizer for light reflection. This segmentation allows each region to optimize its optical function independently, preventing the double-pass light loss that occurs when a polarizer is placed in the reflective region.
Solution Approach 2:
Different optical properties are assigned to different regions of the display panel. The transmissive region has a polarizer to enable light transmission control, while the reflective region lacks a polarizer to maintain high light reflectivity. This local differentiation of optical quality resolves the contradiction between transflective functionality and light loss.
2Ease of operation
If a polarizer is placed in the reflective region, then the display can control light transmission, but power consumption increases due to reduced light source utilization
Solution Approach 1:
The display is segmented into transmissive and reflective regions with different polarizer configurations. The transmissive region maintains polarizer control for operational flexibility, while the reflective region eliminates the polarizer to maximize light utilization and minimize power consumption.
Solution Approach 2:
The reflective region utilizes the inherent reflective properties of the layer structure without requiring a polarizer to control light transmission. This self-service approach allows the reflective region to function independently with high light efficiency, reducing the overall power consumption of the display panel.
3Ease of repair
If light passes through the polarizer twice in the reflective region, then the polarizer can be reused, but only 20% of the original light reaches the reflective layer
Solution Approach 1:
The display panel segments the pixel regions into transmissive and reflective zones, placing the polarizer only in the transmissive region. This segmentation allows the polarizer to serve its light transmission control function without forcing light to pass through it twice, thereby maintaining high light utilization efficiency.
Solution Approach 2:
The polarizer is extracted from the reflective region and relocated to the transmissive region. This extraction eliminates the double-pass light loss in the reflective region, allowing reflected light to maintain its intensity without being attenuated by the polarizer's 45% transmission characteristic.
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 significantly improves light efficiency and reduces power consumption by reusing the 80% of light previously wasted, enhancing the competitiveness of transflective display panels, particularly suitable for high-end intelligent mobile devices.
Implementation Method 1
a first polarizer is provided in an area corresponding to the transmissive region and at a side proximal to the backlight source
Implementation Method 2
a reflective unit is provided in an area corresponding to the reflective region and close to the backlight source
Data Source
AI summary
The present disclosure relates to the field of display technology, and particularly relates to a display panel and a display apparatus. The display panel comprises a backlight source and a display substrate, wherein the display substrate comprises a plurality of pixel regions each comprising a transmissive region and a reflective region, a first polarizer is provided in an area corresponding to the transmissive region and at a side proximal to the backlight source, the first polarizer extends within the transmissive region only; and a reflective unit is provided in an area corresponding to the reflective region and close to the backlight source, and the reflective unit and the first polarizer are substantially provided in a same layer.