Display Apparatus DCC Compensation for Color Reproducibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display apparatuses face challenges in achieving improved color reproducibility, particularly due to issues with leakage light and varying luminance coefficients affecting the display of colors like yellow and blue.
Innovation Solution
The display apparatus employs a backlight with separate light sources for different colors, a mapper to convert input signals into color-specific mapping data, and a compensator using Dynamic Capacitance Capture (DCC) compensation data to generate color output image data, addressing leakage light and luminance coefficient differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a transmissive sub pixel is used to display multiple colors by time-division, then the manufacturing cost is reduced and transmittance is improved, but color reproducibility deteriorates due to leakage light from previous fields
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing DCC compensation data for each color in lookup tables before display operation. The compensator retrieves and applies the appropriate compensation data based on the current field's color requirement, proactively compensating for leakage light effects before they degrade color accuracy. This ensures color reproducibility is maintained without adding physical structure to the transmissive sub pixel.
2Manufacturing precision
If DCC compensation is applied to compensate for leakage light, then color reproducibility is improved, but the device complexity increases due to additional compensator components
Solution Approach 1:
The patent uses copying by creating digital copies of compensation data in lookup tables that store pre-calculated DCC values for different colors and conditions. Instead of adding complex real-time calculation hardware, the system copies and applies pre-computed compensation values based on the current field's color requirements. This maintains color accuracy while keeping the additional complexity minimal and manageable through software-based lookup operations.
3Measurement precision
If separate DCC compensation data is used for different colors, then color accuracy is improved, but the data processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing separate DCC compensation data for each color (yellow, blue, and other colors) in dedicated lookup tables before display operation. The compensator simply retrieves and applies the appropriate pre-computed compensation data based on the current field's color requirement, avoiding complex real-time calculations. This maintains high color accuracy while keeping data processing simple through efficient lookup and application of pre-prepared compensation values.
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
This solution enhances color reproducibility by minimizing color mixing and maintaining accurate color balance across different gradations, improving light efficiency and response speed of liquid crystal molecules.
Implementation Method 1
Liquid crystal display apparatuses are a kind of flat panel display apparatuses and being used for displaying an image on various devices such as televisions, monitors, notebooks, and/or mobile phones. Such a liquid crystal display apparatus adjusts the intensity of an electric field that is applied to a liquid crystal material disposed between two substrates and the intensity of light passing through the two substrates to display an image.
Implementation Method 2
a transmissive sub pixel configured to modulate the first light on a basis of the first color output data during the first field to display a first image having the first color, and to modulate the second light on a basis of the second color output data during the second field to display a second image having the second color
Data Source
AI summary
There is provided a display apparatus comprising: a backlight configured to output a first and a second light having a first and second color during a first and second field of a frame; a mapper configured to map an input image signal into a first and a second mapping data corresponding to the first and second light; a compensator configured to compensate a first and a second color mapping data on a basis of a first and a second DCC compensation data so as to generate a first and second color output image data; and a liquid crystal panel comprising a transmissive sub pixel configured to modulate the first and second light on a basis of the first and second color output data to display a first image having the first color and a second image having the second color.