Dual-LC Light Adjuster Layout for Display Color Deviation
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Solution Overview
Problem
Existing display devices suffer from color deviation due to the combined color reproduction characteristics of a liquid crystal panel for light adjustment and an image display panel, which degrades the quality of the display-output image.
Innovation Solution
A display device configuration with a light adjuster comprising a stack of polarization layers and liquid crystal panels, where one liquid crystal panel has higher transmittance for green light and the other has lower transmittance for green light, allowing controlled light transmission to reduce color deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a liquid crystal panel for light adjustment is placed over an image display panel, then the viewing angle range can be controlled, but color deviation occurs due to the combined color reproduction characteristics of both panels
Solution Approach 1:
The patent extracts and removes the liquid crystal panel for light adjustment from the light transmission path during image display. By making this panel switchable and controlling it to be in an opaque state during normal display operations, the system eliminates the color deviation issue while preserving the viewing angle control capability when needed.
Solution Approach 2:
The patent implements dynamic control of the light adjuster panel's transparency state. The panel can switch between transparent and opaque states based on operational requirements, allowing the system to adapt between different functional modes (image display vs. viewing angle control) without compromising color reproduction quality during image display.
2Adaptability or versatility
If both the liquid crystal panel for light adjustment and the image display panel affect color reproduction, then viewing angle control is achieved, but the quality of the display-output image degrades
Solution Approach 1:
The patent removes the light adjuster panel from the light path during image display operations by controlling it to become opaque. This extraction eliminates the harmful color deviation effect while maintaining the ability to control viewing angles when the panel is in a different state.
Solution Approach 2:
The patent applies preliminary anti-action by pre-controlling the light adjuster panel to be in an opaque state before image display begins. This preventive measure ensures that no color deviation can occur during the display process, while the viewing angle control function remains available through state changes.
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 solution effectively reduces color deviation by optimizing light transmission, enabling controlled viewing angles and maintaining image quality, particularly in applications like vehicle displays where specific viewing angles are required.
Implementation Method 1
a first liquid crystal panel, a second polarization layer, a second liquid crystal panel
Implementation Method 2
a first polarization layer, a first liquid crystal panel, a second polarization layer
Implementation Method 3
a second liquid crystal panel
Implementation Method 4
a second polarization layer, a second liquid crystal panel, and a third polarization layer
Data Source
AI summary
According to an aspect, a display device includes: a display panel having a display region configured to output an image; a light source configured to emit light; and a light adjuster interposed between the display panel and the light source and capable of changing a transmission degree of light between the display panel and the light source. In the light adjuster, a first polarization layer, a first liquid crystal panel, a second polarization layer, a second liquid crystal panel, and a third polarization layer are stacked from the light source side toward the display panel side. One of the first and second liquid crystal panels has a relatively higher transmittance of green light than the transmittance of red light and the transmittance of blue light. The other thereof has a relatively lower transmittance of green light than the transmittance of red light and the transmittance of blue light.