Display Device Multi-Line Drive Luminance Correction
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Solution Overview
Problem
Existing display devices using the multi-line drive method for improving image quality require memory to hold luminance values for one frame period, increasing circuit complexity and potentially degrading image quality due to luminance deviations between subframes.
Innovation Solution
A display device configuration where pixels in rows not matching the current subframe data emit light with a first condition, and pixels in matching rows emit light with a second condition having a higher light emission amount, using a simple arrangement to improve image quality without the need for frame memory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If memory is added to hold luminance values for one frame period, then image quality can be corrected, but circuit complexity increases
Solution Approach 1:
The patent applies preliminary action by controlling the light emission amount of pixels in advance based on their row matching status with subframe data, rather than correcting luminance after storage. The drive unit determines which pixels require higher emission amounts before the display period begins, eliminating the need for frame memory while achieving luminance correction
Solution Approach 2:
The patent changes the light emission parameter dynamically based on row matching conditions. Pixels in rows matching the current subframe data are driven with a second condition (higher emission amount), while pixels in non-matching rows use a first condition (lower emission amount). This parameter differentiation achieves luminance correction without requiring additional memory circuits
2Manufacturing precision
If light emission amount is increased for matching rows, then original luminance is restored, but power consumption may increase
Solution Approach 1:
The patent applies local quality by differentiating light emission conditions only for specific pixel rows that require luminance correction, rather than increasing emission for all pixels. Only pixels in rows matching the current subframe data receive the second drive condition with higher emission amounts, while other pixels maintain the first condition, thus localizing power consumption increase to only where necessary for luminance accuracy
Data Source
AI summary
A display device displays an image in which each frame is formed by at least two subframes. The display device includes a drive unit configured to drive a plurality of pixels in a pixel array so as to drive pixels in at least two rows based on pixel data of each row of each supplied subframe data. The drive unit drives the plurality of pixels so as to cause pixels in a row not matching a row in the supplied current subframe data to emit light with a first condition, and cause pixels in a row matching the row in the current subframe data to emit light with a second condition. The second condition is a condition in which a light emission amount is larger than in the first condition when causing the pixels to emit light in accordance with identical pixel values.