Dual-Layer Liquid Crystal Display with Segmented Dimming Control
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Solution Overview
Problem
Existing display devices face challenges in controlling light transmission to accurately match image output, particularly when viewed from oblique angles, due to the difficulty in synchronizing dimming panel regions with pixel control in liquid crystal display panels.
Innovation Solution
A display device configuration featuring a first and second liquid crystal panel with dimming pixels and a controller that performs blurring processing and determines dimming gradation values to control light transmission based on image signals, ensuring proper light distribution and reducing image chipping or double images when viewed from different angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the dimming panel region is set larger than the pixel control region to enable oblique viewing, then viewing angle is improved, but it becomes difficult to synchronize light transmission regions with image output regions
Solution Approach 1:
The patent segments the dimming panel into multiple independently controllable dimming regions, each corresponding to multiple pixels in the liquid crystal display panel. This segmentation allows precise control of light transmission in each region to match the image output regions, while the overall dimming panel can still be larger than the display panel to enable oblique viewing. The controller independently adjusts the light transmission degree of each dimming region based on the image signal.
Solution Approach 2:
The patent applies different light transmission degrees to different dimming regions based on local image requirements. Each dimming region's light transmission is independently controlled to precisely match its corresponding pixel region, creating local optimization. This allows the dimming panel to have both larger overall area for oblique viewing and precise local synchronization with image regions.
2Adaptability or versatility
If the dimming panel region is set larger than the pixel control region, then oblique viewing capability is improved, but image quality deteriorates due to inability to precisely control light distribution
Solution Approach 1:
By dividing the dimming panel into multiple controllable regions that correspond to pixel groups, the patent enables precise local control of light transmission. This segmentation ensures that each dimming region's light output matches its corresponding image region, maintaining image quality consistency even when the overall dimming panel is larger for oblique viewing.
Solution Approach 2:
The patent dynamically adjusts the light transmission degree of each dimming region based on real-time image signals. The controller independently controls each dimming region's transmittance to match the brightness requirements of corresponding pixel regions, ensuring image quality consistency across different viewing angles and conditions.
3Measurement precision
If independent control of each pixel's light transmission is implemented, then image precision is improved, but control complexity increases due to synchronization requirements
Solution Approach 1:
The patent merges multiple pixels into single dimming region control units. Each dimming region corresponds to multiple pixels and is controlled as one unit, reducing the number of independent control channels. This merging approach maintains pixel-level light control precision while significantly reducing control synchronization complexity compared to controlling each pixel individually.
Solution Approach 2:
Each dimming region serves multiple functions: it controls light transmission for multiple underlying pixels simultaneously, enables oblique viewing when collectively larger than the display panel, and maintains image precision through independent control. This multi-functionality reduces overall system complexity while achieving high precision control.
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 enhances light control and image quality by expanding the light transmission region and reducing unintended luminance increases when viewed from oblique angles, providing a more accurate and consistent image output.
Implementation Method 1
a first liquid crystal panel; a second liquid crystal panel arranged on one surface side of the first liquid crystal panel so as to face the first liquid crystal panel
Implementation Method 2
a controller configured to control the first liquid crystal panel and the second liquid crystal panel based on an image signal
Data Source
AI summary
According to an aspect, a display device includes: a first liquid crystal panel; a second liquid crystal panel; a light source configured to emit light; and a controller configured to control the first liquid crystal panel and the second liquid crystal panel based on an image signal corresponding to a resolution of the second liquid crystal panel. The first liquid crystal panel includes dimming pixels, and the second liquid crystal panel includes pixels. More than one of the pixels is arranged within a region of each of the dimming pixels. The controller performs blurring processing and determination of dimming gradation values as processing related to operation of the second liquid crystal panel. Each of the dimming gradation values corresponds to a highest gradation value set after the blurring processing among gradation values set for the more than one pixel arranged within the region of each of the dimming pixels.