Curved Display Luminance Uniformity via Viewing Angle Compensation
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Solution Overview
Problem
Flexible organic light emitting display devices suffer from luminance unevenness across different areas of the display panel, particularly between flat and curved regions, leading to deteriorated image quality due to inconsistent viewing angles.
Innovation Solution
A display device and driving method that includes an image analyzing unit and a luminance control unit to increase the luminance of curved areas based on viewing angles, ensuring uniform luminance across the panel by activating a luminance compensating function only when a viewer is present, thereby reducing power consumption and minimizing OLED damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the luminance of the curved area is kept constant with the plane area, then the device complexity is reduced, but the image quality deteriorates due to luminance unevenness
Solution Approach 1:
The patent applies local quality by differentiating luminance control between the curved area and the plane area. The curved area receives enhanced luminance compensation specifically tailored to its viewing angle characteristics, while the plane area maintains standard luminance output. This localized approach resolves the contradiction by improving image quality uniformity without unnecessarily increasing overall device complexity.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the luminance output parameter of the curved area based on its specific viewing angle. The luminance compensation ratio is calculated as a function of the viewing angle, transforming the fixed luminance parameter into a variable one that adapts to the geometric characteristics of different display regions.
2Manufacturing precision
If luminance compensating function is always activated, then image quality uniformity is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the luminance compensating function switchable between active and inactive states based on viewing conditions. The system dynamically adjusts its operation mode according to whether the display is being viewed from the front or from an angle, thereby optimizing the balance between image quality uniformity and power consumption.
Solution Approach 2:
The system incorporates self-service through automatic detection of viewing conditions and autonomous activation/deactivation of the luminance compensating function. The display device monitors its own operational state and viewer position, making intelligent decisions about when to apply luminance compensation without requiring external intervention.
3Manufacturing precision
If luminance of curved area is increased to compensate viewing angle, then image quality is improved, but OLED damage risk increases
Solution Approach 1:
The patent applies partial action by implementing luminance compensation only to the extent necessary to achieve uniform image quality, rather than applying maximum possible compensation. The compensation ratio is precisely calculated based on viewing angle geometry, applying just enough luminance enhancement to correct the distortion without excessive action that would harm OLED longevity.
Data Source
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AI summary
The present disclosure relates to a display device and a driving method of a display device. The display device includes: a display panel which includes a plane area and at least one curved area disposed at the outside of the plane area; a timing controller configured to use an image signal to generate image data; and a data driver configured to use the image data to output a data voltage to a plurality of pixels disposed in the plane area and a plurality of pixels disposed in the at least one curved area, in which the timing controller includes: an image analyzing unit configured to analyze an image signal corresponding to the at least one curved area and a luminance control unit configured to control the image signal corresponding to the at least one curved area to increase a luminance of the at least one curved area. By doing this, the luminance of the at least one curved area is increased based on the viewing angle to increase the luminance uniformity of the display panel, thereby minimizing the deterioration of the image quality due to the curved area.