Field-Sequential Color Display Brightness Correction
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Solution Overview
Problem
Field-sequential-color display devices face issues with color mixing due to the difference between the response time of display elements and the reproduction time of color fields, leading to inaccurate color representation.
Innovation Solution
A method is implemented where a processor calculates transition-brightness-values and correction-brightness-values to adjust the brightness of subsequent color fields, ensuring accurate color expression by accounting for the response time and reproduction time of display elements, and these values are used to correct the brightness values displayed in the display unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a field-sequential-color display method is used to achieve high fill factor and high-definition pixels, then color display efficiency is improved, but color mixing occurs due to response time delay causing inaccurate color representation
Solution Approach 1:
The patent applies preliminary action by calculating and applying brightness correction values before displaying each color field. The processor pre-compensates for the response time delay by adjusting the brightness of each color field based on the brightness of the previous color field, ensuring that the displayed colors remain accurate despite the inherent delay in display element response.
Solution Approach 2:
The patent implements feedback by using the brightness information of previously displayed color fields to adjust subsequent color fields. The processor continuously monitors and compensates for brightness transitions between color fields, creating a closed-loop system that maintains color accuracy by feeding back the effects of response time delay and correcting them in real-time.
2Object-affected harmful factors
If color fields are displayed sequentially at high speed to prevent temporal color separation, then color mixing is reduced, but the response time requirement becomes more stringent and harder to meet
Solution Approach 1:
The patent applies parameter changes by modifying the brightness parameter of each color field based on the response characteristics of the display element. Instead of increasing the switching speed to meet the stringent response time requirements, the system changes the brightness parameters to compensate for the delay, allowing standard response times to achieve the desired color accuracy.
3Measurement precision
If brightness correction is applied to account for response time delay, then color accuracy is improved, but calculation complexity increases
Solution Approach 1:
The patent extracts and addresses only the essential brightness correction calculation needed to compensate for response time delay. By focusing on the specific parameter (brightness transition between color fields) that causes color mixing, the system avoids unnecessary computational complexity while achieving the required color accuracy through targeted brightness adjustments.
Data Source
AI summary
Disclosed is a field-sequential-color display device sequentially driving a plurality of color fields divided from any one frame of a plurality of frames, including: a processor calculating a second field brightness-correction-value of a second color field based on a first field transition-brightness-value transferred from a first color field; and a display unit controlling the second color field based on the second field brightness-correction-value. Correction data is calculated by reflecting a brightness-value transited between color fields in a display to a non-linear brightness-value displayed in the corresponding field to minimize an error caused due to a difference between linear image data and a non-linear brightness-value displayed in the display.