Display Apparatus Mitigating Color Breakup via Complementary Dimming Areas
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Solution Overview
Problem
Field sequential type liquid crystal display apparatuses experience a color breakup phenomenon where red, green, and blue color images are momentarily separated when the viewpoint changes due to eye blinking or screen movement, leading to a poor display quality.
Innovation Solution
A display apparatus with a plurality of dimming areas and a timing controller that determines complementary colors for each dimming area, controlling light sources to supply specific colors during different sub-frames to mitigate color breakup, using a light source unit and a driving method that analyzes pixel colors and generates control signals to synchronize light source operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If time division type display is used to achieve high transmittance and low manufacturing cost, then manufacturing cost and transmittance are improved, but color breakup phenomenon occurs when viewpoint changes
Solution Approach 1:
The display panel is divided into multiple dimming areas, each independently controllable with its own backlight unit. This segmentation allows each area to be optimized for color consistency while maintaining the overall benefits of time division type display architecture.
Solution Approach 2:
Each dimming area is assigned a specific complementary color scheme based on its position and function. The central dimming area uses different color control strategies compared to peripheral areas, with the central area focusing on color consistency during viewpoint changes.
2Device complexity
If field sequential color method is used to reduce manufacturing cost, then device complexity is reduced, but color breakup occurs during eye blinking or screen movement
Solution Approach 1:
The system pre-determines complementary colors for each dimming area before display operation. The timing controller stores and manages color information for all dimming areas in advance, enabling rapid color switching without complex real-time calculations during operation.
Solution Approach 2:
The display operates using periodic sub-frames with specific timing patterns. Each frame is divided into multiple sub-frames that sequentially display different colors, with the timing controller coordinating backlight activation to create the perception of full-color images while maintaining color consistency.
3Stability of the object's composition
If complementary colors are supplied to central dimming area during different sub-frames to mitigate color breakup, then color consistency is improved, but light source control complexity increases
Solution Approach 1:
The timing controller performs multiple functions: it generates gate control signals for the display panel, controls the light source driving unit, determines complementary colors for each dimming area, and manages sub-frame timing. This multi-functionality consolidates control complexity into a single device rather than requiring separate control systems.
Solution Approach 2:
The timing controller acts as an intermediary between the input data and the display panel and light source unit. It receives color information, processes it to determine complementary colors, and translates this into coordinated control signals for both the display panel and backlight units, simplifying the overall control architecture.
Data Source
AI summary
A display apparatus comprises a display panel comprising a plurality of dimming areas, a light source unit configured to supply light to the display panel, a timing controller configured to receive a control signal and input data and to generate a gate control signal, a data control signal, and a light source control signal, a display panel driving unit configured to drive the display panel based on the gate and data control signals, and a light source driving unit configured to drive the light source unit based on the light source control signal, wherein based on the input data, the timing controller is configured to determine a first color of at least any one dimming area among the dimming areas and a second color in a complementary color relationship to the first color and to supply information on the first and second colors to the light source driving unit.