Position Offset Correction Circuit for Display Uniformity
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Solution Overview
Problem
High-definition imaging technologies face display irregularities due to small grayscale voltage errors, leading to streaks in images, particularly in multiplex driving systems where position and order offsets in data signals cause luminance and color irregularities.
Innovation Solution
An integrated circuit device with a data line driving circuit, position offset register, and position offset addition circuit corrects position offsets by storing and processing position offset setting values to add correction values to image data, while an order offset register and order offset addition circuit address order offsets, ensuring accurate voltage distribution across pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiplex driving is used to increase productivity, then the number of pixels driven per horizontal scanning period increases, but position offsets are generated in the multiple data voltages causing display irregularity
Solution Approach 1:
The patent applies preliminary action by calculating and storing position offset setting values in advance for each pixel position before the actual display operation. The position offset addition circuit then retrieves these pre-calculated values and adds them to the image data in real-time, preventing display irregularity without delaying the multiplex driving operation.
2Manufacturing precision
If position offset correction is applied to each pixel to improve display precision, then the number of circuit components increases
Solution Approach 1:
The patent merges the position offset correction function into a single position offset addition circuit that processes image data for all pixels. Instead of implementing separate correction circuits for each pixel, the invention combines the correction functionality into one circuit that adds position offset setting values to the respective image data, thereby reducing overall circuit complexity while maintaining display uniformity.
3Measurement precision
If higher definition and higher multiple grayscale levels are pursued, then the grayscale voltage for each level becomes smaller, but display irregularity occurs even with small errors in data voltages
Solution Approach 1:
The patent applies preliminary anti-action by proactively compensating for potential voltage errors through position offset correction. The position offset addition circuit adds pre-calculated correction values to the image data before it reaches the display pixels, preventing display irregularity from occurring in the first place rather than attempting to correct it after the fact.
Data Source
AI summary
An integrated circuit device having a data line driving circuit and a position offset addition circuit that connects position offsets based on position offset setting values, wherein, among first pixel to p-th pixel of a plurality of pixels, a position offset register stores a first position offset setting value corresponding to the first pixel and a p-th position offset setting value corresponding to the p-th pixel among the first pixel to the p-th pixel; among first image data to p-th image data respectively corresponding to the first pixel to the p-th pixel, the position offset addition circuit processes a position offset correction value based on the first position offset setting value to the first image data, and processes a position offset correction value based on the p-th position offset setting value to the p-th image data among the first image data to p-th image data, to correct the position offsets.