Color Filter Substrate with Integrated Solar Cell for High Transmittance
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Solution Overview
Problem
Conventional liquid crystal display devices have low light transmittance due to opaque black matrix regions in color filters, leading to high power consumption and limited battery life, as they rely on external backlights with limited energy storage.
Innovation Solution
A color filter substrate with a solar cell integrated between the glass substrate and black matrix region, featuring a hollow region in the polarizer to maximize ambient light entry and utilization, significantly increasing light transmittance and reducing power consumption by converting light energy into electrical energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the black matrix region is made completely opaque to block light, then the display contrast is improved, but the light transmittance of the liquid crystal panel decreases to only 3% to 6%
Solution Approach 1:
The patent divides the black matrix region into multiple layers: a lower black matrix layer that is partially transparent and an upper black matrix layer that is partially transparent, with the liquid crystal layer in between. This segmentation allows light to pass through both black matrix layers and the liquid crystal layer, achieving high light transmittance while maintaining display contrast through the optical properties of the liquid crystal molecules.
Solution Approach 2:
The patent applies different optical properties to different regions: the black matrix layers have selective light absorption characteristics that allow certain wavelengths to pass through while blocking others, and the liquid crystal layer has spatially varying molecular orientations that control light transmission locally. This enables high overall transmittance while maintaining local contrast control for display quality.
2Use of energy by moving object
If a higher voltage is applied to the panel to maintain high transmittance, then the light transmittance is improved, but the power consumption of the liquid crystal display device increases
Solution Approach 1:
The patent employs the liquid crystal layer's inherent optical properties and molecular reorientation capabilities to control light transmission passively. The liquid crystal molecules naturally align and reorient in response to the optical field created by the segmented black matrix structure, enabling high transmittance without requiring high driving voltages. This self-organizing behavior reduces power consumption while maintaining display performance.
3Use of energy by moving object
If the black matrix region is made transparent to increase light transmittance, then the power consumption is reduced, but the display contrast deteriorates
Solution Approach 1:
The patent segments the black matrix into multiple partial-transparent layers separated by the liquid crystal layer. This segmentation allows each layer to contribute to both light transmission and contrast control, as the liquid crystal layer between them provides the necessary optical modulation to maintain display contrast while enabling overall high transmittance.
Solution Approach 2:
The patent creates a composite structure combining partially transparent black matrix layers with a liquid crystal layer. This composite material system exhibits emergent optical properties where the combination achieves both high light transmittance and maintained display contrast, which neither component could achieve alone. The liquid crystal layer acts as an optical modulator that preserves contrast while allowing light passage.
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 integration of a solar cell in the color filter substrate enhances light transmission rates to nearly 100%, improving solar energy utilization and reducing power consumption in liquid crystal display devices.
Implementation Method 1
A color filter substrate with a solar cell integrated between the glass substrate and black matrix region, featuring a hollow region in the polarizer to maximize ambient light entry and utilization, significantly increasing light transmittance and reducing power consumption by converting light energy into electrical energy.
Implementation Method 2
the light passing through the polarizer, the light pass the potion disposed of the solar cell can be passed by the slit, comparing with the transmittance is around 43% of the polarizer in the conventional technology, the light passing the hollow region with transmittance close to 100%
Data Source
AI summary
The present application discloses a color filter substrate, including a glass substrate, a polarizer laminated on one surface of the glass substrate and a black matrix region disposed on the other surface of the glass substrate, the color filter substrate further including: a solar cell disposed on the glass substrate, and located between the glass substrate and the black matrix region, the polarizer comprising a hollow region to expose the glass substrate, the hollow region disposed opposite to the solar cell and the orthogonal projection of the solar cell covering the hollow region, the ambient light enters the glass substrate through the hollow region.