Display Device Odd Even Row Drive Inversion
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Solution Overview
Problem
In display devices employing a one-side driving configuration, significant luminance distribution differences occur due to transient differences in pulse driving between the right and left sides of the panel, leading to shading issues.
Innovation Solution
The implementation of two drive units on the same substrate as the pixel array unit, with output stages driving odd and even rows, and inverting the driving for each field, allows for balanced luminance distribution by averaging luminance differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one-side driving configuration is used to reduce the number of drive units, then device complexity is reduced, but luminance distribution uniformity deteriorates due to transient differences between right and left sides of the panel
Solution Approach 1:
The pixel rows are segmented into odd rows and even rows, which are driven by different drive units alternately. This segmentation allows the transient differences affecting odd and even rows to be distributed differently across the panel, reducing the visible shading effect while maintaining the simplified one-side driving architecture
Solution Approach 2:
The drive units operate in a periodic alternating manner, where one drive unit drives odd rows during one field and even rows during the next field, inverting the driving pattern each field. This periodic action ensures that transient differences are distributed alternately across different regions, averaging out the luminance distribution and mitigating shading
2Manufacturing precision
If two drive units are used to improve luminance distribution, then luminance uniformity is improved, but device complexity increases
Solution Approach 1:
Each drive unit is designed to be multi-functional, capable of driving both odd rows and even rows depending on the field. This universality allows two drive units to handle all pixel rows alternately, achieving improved luminance distribution without requiring four dedicated drive units (two for odd rows and two for even rows), thus limiting the increase in device complexity
3Ease of manufacture
If output stages are positioned with pixel array unit interposed between drive units, then ease of manufacture is improved, but transient difference effects are amplified
Solution Approach 1:
Instead of having each drive unit continuously drive a specific side (left or right), the invention inverts the approach by having drive units alternate between driving odd rows and even rows. This inversion ensures that the transient differences introduced by the physical positioning are distributed alternately across the panel, averaging out the luminance distribution and mitigating shading effects
Data Source
AI summary
Provided is a display device including: a pixel array unit in which pixels including a light-emitting unit are arranged in a matrix shape; two drive units which are disposed on the same substrate as the pixel array unit with the pixel array unit interposed therebetween, which have output stages in a number that is half of the number of pixel rows of the pixel array unit, and in which the output stages are in charge of driving of pixels on an odd row side and on an even row side; and a control unit which performs control of driving the pixels on the odd row side by using the output stages of one drive unit between the two drive units, of driving the pixels on the even row side by using the output stages of the other drive unit, and of inverting the driving for each field.