Gamma Voltage Generator Segmentation for Display Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices consume excessive power and degrade image quality due to the use of a single voltage value for black gradation across all pixels, which limits the representation of black gradation and increases power consumption.
Innovation Solution
A display device with a gamma voltage generator that produces distinct gamma voltages for red, green, and blue pixels, allowing for varying black data voltages based on individual highest gamma register values, reducing unnecessary power consumption and maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same voltage value is used for all black gamma voltages across R, G, and B pixels, then the circuit design is simplified, but power consumption increases and image quality deteriorates
Solution Approach 1:
The patent segments the black gamma voltage generation into separate pathways for R, G, and B pixels. Each color channel has its own black gamma voltage generation circuit that uses dedicated highest gamma register values, allowing independent voltage optimization for each color rather than using a single shared voltage value.
Solution Approach 2:
The patent applies local quality by assigning different highest gamma register values and different black gamma voltage values to different color channels (R, G, B) based on their specific characteristics. This allows each pixel type to receive optimally tailored voltage levels for its particular requirements rather than a uniform voltage approach.
2Device complexity
If the same voltage value is used for all black gamma voltages across R, G, and B pixels, then the circuit design is simplified, but image quality deteriorates due to limited black gradation representation
Solution Approach 1:
The patent segments the black gamma voltage generation into separate pathways for R, G, and B pixels. Each color channel has its own black gamma voltage generation circuit that uses dedicated highest gamma register values, allowing independent voltage optimization for each color rather than using a single shared voltage value.
Solution Approach 2:
The patent applies local quality by assigning different highest gamma register values and different black gamma voltage values to different color channels (R, G, B) based on their specific characteristics. This allows each pixel type to receive optimally tailored voltage levels for its particular requirements rather than a uniform voltage approach.
3Manufacturing precision
If higher voltage values are used to ensure black gradation representation, then image quality is maintained, but power consumption increases
Solution Approach 1:
The patent changes the voltage parameter by generating different black gamma voltage values for different color channels based on their specific highest gamma register values. This allows optimization of voltage levels to the minimum necessary for each color channel, avoiding the use of excessively high voltage values that would increase power consumption while still maintaining adequate black gradation representation.
Data Source
AI summary
A display device includes a display panel including data lines, gate lines which cross the data lines, and pixels; a gamma voltage generator configured to generate first to nth gamma voltages, n being an integer; and a data driver configured to generate data voltages by selecting the gamma voltages according to input image data, and to supply the data voltages to the data lines, wherein the gamma voltage generator comprises a first voltage dividing unit configured to divide a reference voltage; a first voltage dividing circuit configured to generate the first gamma voltage by selecting voltages output from the first voltage dividing unit according to a highest gamma register value; and a second voltage dividing circuit configured to generate the second to nth gamma voltages using the reference voltage.