Display Luminance Correction via Image Feedback
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Solution Overview
Problem
Display devices such as LCD and OLED face luminance variations due to manufacturing process inconsistencies, leading to non-uniform pixel characteristics, which existing technologies fail to adequately address.
Innovation Solution
A display device system that uses a photographing device to capture images of displayed content, generating variation information to correct data signals and adjust luminance, accounting for lens and voltage drop variations, ensuring uniform luminance across pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manufacturing process is used to produce display pixels, then productivity is improved, but manufacturing precision deteriorates due to luminance variations between pixels
Solution Approach 1:
The patent implements a feedback mechanism by photographing the displayed image with a photographing device, generating variation information that reflects luminance variations, and using this information to correct data signals. This closed-loop feedback system automatically compensates for manufacturing variations without requiring manual adjustment of each pixel.
Solution Approach 2:
The display device performs self-correction by using its own displayed image as the basis for generating variation information. The system photographs its own output, analyzes the luminance variations, and automatically adjusts data signals to compensate for these variations, enabling the device to self-correct manufacturing defects.
2Manufacturing precision
If data correction is applied to compensate luminance variations, then manufacturing precision is improved, but device complexity increases due to additional compensation components
Solution Approach 1:
The photographing device serves multiple functions: it captures the displayed image for variation analysis, generates variation information, and enables the correction system to operate. This multi-functional approach eliminates the need for separate sensing components, reducing overall device complexity while maintaining luminance correction capability.
Solution Approach 2:
The patent introduces variation information as an intermediary element that bridges the gap between the displayed image and the correction mechanism. This intermediary data structure simplifies the correction process by providing a direct representation of luminance variations that can be easily processed and applied to data signal correction.
3Measurement precision
If photographing device is used to capture displayed image, then measurement precision is improved, but object-generated harmful factors increase due to lens luminance variation
Solution Approach 1:
The system applies preliminary anti-action by pre-correcting data signals based on variation information before the luminance variations manifest in the final display. By anticipating and compensating for lens-induced variations in advance, the system prevents these harmful effects from appearing in the corrected output.
Solution Approach 2:
The patent converts the harmful lens luminance variation into a beneficial measurement reference. The variation information generated from photographing the displayed image, which initially appears as a distortion, is actually used as valuable data to identify and correct luminance variations, turning the lens defect into a diagnostic tool.
Data Source
AI summary
A display device according to an exemplary embodiment of the present invention includes: a display unit configured to display a specific image according to first data supplied from the outside; an image compensator configured to receive a photographed image in which the specific image is photographed and generate variation information corresponding to luminance variations of pixels using the photographed image; an image corrector configured to generate second data by correcting the first data according to the variation information; and a data driver configured to generate a data signal using the first data or the second data and supply the data signal to the display unit.