Display Device Peaking Mode Fourth Color Signal Processing
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Solution Overview
Problem
Existing display devices struggle to clearly distinguish the focusing region from other regions in an image, as techniques like adding a fourth sub-pixel can result in images of the same color, making the focusing region difficult to discern.
Innovation Solution
A display device with a signal processing unit that converts input signals into an extended HSV color space, including a first, second, third, and fourth color, and increases the value of the fourth color at the outer edge of the focusing region for peaking mode, enhancing visibility of the focusing region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a fourth sub-pixel (white pixel) is added to red, green, and blue sub-pixels to enhance luminance and reduce power consumption, then the luminance is enhanced and power consumption is reduced, but images of the same color are generated in the image, making the focusing region difficult to distinguish from other regions
Solution Approach 1:
The patent applies local quality by differentiating the treatment of the fourth sub-pixel between focusing regions and non-focusing regions. In focusing regions, the fourth sub-pixel is driven with a first drive signal to enhance visibility, while in non-focusing regions, it is driven with a second drive signal. This local differentiation allows the focusing region to be clearly distinguished from other regions while maintaining the power-saving benefits of the fourth sub-pixel in non-critical areas.
2Illumination intensity
If the fourth sub-pixel is used to enhance luminance, then power consumption is reduced, but the focusing region becomes hard to see because images of the same color are generated
Solution Approach 1:
The patent implements local quality by applying different drive signals to the fourth sub-pixel based on the regional characteristics of the display. In focusing regions where visibility is critical, the first drive signal is applied to maximize luminance and make the focusing region stand out. In non-focusing regions, the second drive signal is applied to maintain adequate luminance while reducing power consumption, thus resolving the contradiction between luminance enhancement and focusing region visibility.
3Measurement precision
If peaking processing is performed to detect the focusing region, then the focusing region can be identified, but the focusing region becomes hard to see when the same color is added to the in-focus region
Solution Approach 1:
The patent applies color changes by utilizing the fourth sub-pixel (white pixel) to modify the color output in the focusing region. After peaking processing detects the focusing region, the fourth sub-pixel is driven with a first drive signal that adds white color to the in-focus region, creating a visual contrast with non-focusing regions. This color modification makes the detected focusing region visually distinguishable and easy to see.
Data Source
AI summary
According to an aspect, a display device includes a signal processing unit that converts an input value of a input HSV color space of an input signal into an extension value of an extended HSV color space extended with a first color, a second color, a third color, and a fourth color to generate an output signal; performs peaking processing for analyzing the input signal of the imaged image to detect a focusing region; and determines whether to perform display in a peaking mode for highlighting the focusing region. When it is determined to perform display in the peaking mode, the signal processing unit increases a value of the output signal of the fourth color of a pixel in an outer edge of the focusing region.