Display Device Light Control Unit Adaptive Transmittance
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Solution Overview
Problem
Display devices, both non-luminous and self-luminous types, face challenges in achieving improved display quality due to issues like light leakage, complex structures, and complex control mechanisms, particularly in achieving suitable contrast ratios and gamma curves.
Innovation Solution
A display device with a simple structure and control mechanism, featuring a display unit and a light control unit that adjusts transmittance based on incident light intensity, using photochromic materials or TFT substrates with photoresistors or photodiodes to control light transmission effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual-cell display device is used to control light leakage and improve contrast ratio, then the contrast ratio is improved, but the structure becomes complex and control mechanism becomes complex
Solution Approach 1:
The patent combines the display function and light control function into a single integrated display element. The display element simultaneously performs light modulation for image display and adaptive light control for contrast enhancement, eliminating the need for separate dual-cell structures while achieving improved contrast ratio through integrated photodetector-based feedback control.
Solution Approach 2:
The display element is designed to perform multiple functions: it acts as both the display medium for image rendering and the light control mechanism for contrast enhancement. The photodetector integrated within the display element enables it to detect ambient light and automatically adjust its optical properties, making the system universally adaptable to different lighting conditions without additional components.
2Reliability
If a dual-cell display device is used to achieve pixel-level light control, then the display quality is improved, but the control mechanism becomes complex
Solution Approach 1:
The display element incorporates integrated photodetectors that automatically detect ambient light conditions and trigger appropriate light control responses without external intervention. The system performs self-diagnosis and self-adjustment of optical properties based on real-time light sensing, eliminating the need for complex external control mechanisms while maintaining high display quality.
Solution Approach 2:
The patent implements a feedback control mechanism where photodetectors integrated in the display element continuously monitor ambient light levels and provide real-time feedback to adjust the display element's optical properties. This closed-loop feedback system automatically optimizes display quality under varying lighting conditions without requiring complex external control circuits.
3Reliability
If self-luminous type display devices are used to achieve higher contrast ratio, then the contrast ratio is improved, but the luminance at grayscale level 1 is too high making gamma curve adjustment difficult
Solution Approach 1:
The patent employs dynamic light control capabilities where the display element can adaptively adjust its optical properties in real-time based on ambient light conditions detected by integrated photodetectors. This dynamic adjustment mechanism enables flexible gamma curve control and luminance optimization across different grayscale levels, allowing precise control of the display characteristics that would be difficult to achieve with fixed self-luminous display structures.
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 proposed solution enhances the contrast ratio and improves display quality by effectively managing light transmission, reducing light leakage, and simplifying the structure and control mechanisms compared to dual-cell display devices.
Implementation Method 1
the photochromic material shifts into a state that allows passage of visible light in response to incidence of visible light from the display unit and shifts into a state that blocks visible light in response to incidence of UV light from the UV front light
Implementation Method 2
the light control unit exhibits a higher visible light transmittance as an intensity of visible light incident from the display unit increases
Implementation Method 3
the photoresistors or the photodiodes each connect a corresponding drain electrode to one of the source electrodes adjacent to the drain electrode, and the light control unit includes a light blocking layer above the photoresistors or the photodiodes
Implementation Method 4
the TFT substrate includes a semiconductor layer at a position where visible light from the display unit is incident, and source electrodes and drain electrodes connected via the semiconductor layer, and the light control unit includes a light blocking layer above the semiconductor layer
Data Source
AI summary
Provided is a display device that can exhibit, with a simple structure and a simple control mechanism, improved display quality as both a non-luminous type display device and a self-luminous type display device. The display device includes a display unit, and a light control unit disposed adjacent to a light emitting surface side of the display unit, the light control unit exhibiting a higher visible light transmittance as an intensity of visible light incident from the display unit increases.