Display Device Luminance Data Processing via Polynomial Interpolation
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Solution Overview
Problem
Display devices face challenges in efficiently processing and transmitting luminance distribution data at high resolutions, leading to increased processing loads and communication burdens between controllers, which affects image quality and power consumption.
Innovation Solution
A display device configuration that includes a signal processor generating second luminance distribution data at a lower planar density, applying polynomial interpolation to adjust and transmit it, and a signal output circuit upsampling to achieve the required resolution, thereby reducing processing and communication loads while allowing software adjustments without hardware changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If luminance distribution data is processed at high resolution matching pixel resolution, then image quality is improved, but processing load and communication burden increase
Solution Approach 1:
The patent divides the luminance distribution data processing into two stages: first generating low-resolution luminance distribution data at a lower planar density, then upsampling it to match the pixel resolution. This segmentation of processing stages reduces the overall processing load while maintaining the required image quality
Solution Approach 2:
The patent changes the dimension of processing by working at a lower planar density dimension first, generating luminance distribution data at reduced resolution, then using interpolation to expand it to the required high resolution. This dimensional transformation reduces computational complexity
2Measurement precision
If luminance distribution data is transmitted at high resolution, then image quality is improved, but communication burden between controllers increases
Solution Approach 1:
The patent extracts only the essential luminance distribution information at low resolution from the high-resolution image data, separates it from the full image data, and transmits only this extracted low-resolution luminance data between controllers. This reduces the communication data volume while preserving the necessary information for local dimming control
Solution Approach 2:
The patent transmits luminance distribution data at a lower planar density dimension rather than full resolution, then performs dimensional expansion through upsampling in the receiving controller. This dimensional transformation significantly reduces the quantity of data transmitted
3Measurement precision
If polynomial interpolation is applied to generate high-resolution luminance data, then image quality is improved, but processing complexity increases
Solution Approach 1:
The patent performs the computationally intensive polynomial interpolation operation in advance during the generation of luminance distribution data, before the data needs to be used for image display. This preliminary processing allows the system to prepare high-resolution luminance data ahead of time, reducing real-time processing requirements
Data Source
AI summary
A display device includes: a first controller that outputs an output image signal having the same resolution as that of pixels to an image display panel; and a second controller that transmits an input image signal to the first controller, generates second luminance distribution data divided into regions at a second density lower than a first density equal to the resolution, and transmits the second luminance distribution data to the first controller. The second controller generates first luminance distribution data divided into regions at a third density lower than the second density, controls an illuminator based on the first luminance distribution data, and generates the second luminance distribution data by applying a polynomial interpolation to the first luminance distribution data. The first controller generates third luminance distribution data having the resolution, and generates the output image signal by adjusting the input image signal based on the third luminance distribution data.