Electrochromic Glass and LCD Panel Transparency for Single-Exposure HDR
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Solution Overview
Problem
Conventional HDR image photographing methods require multiple exposures, leading to higher power consumption in electronic devices.
Innovation Solution
The method involves an electronic device with a liquid crystal display (LCD) panel, a backlight module, and an electrochromic glass, where the electrochromic glass is controlled to be transparent during camera operation, allowing external light to pass through and enabling the adjustment of LCD panel transparency based on luminance distribution information to obtain a target HDR image with reduced exposures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple exposures are performed to capture HDR images, then the HDR image quality is improved, but the power consumption increases
Solution Approach 1:
The LCD panel transparency is dynamically adjusted based on the luminance distribution information obtained from the reference image. By making the LCD panel transparent in regions corresponding to bright areas and opaque in regions corresponding to dark areas, the system captures HDR information in a single exposure, eliminating the need for multiple exposures and reducing power consumption while maintaining HDR image quality
Solution Approach 2:
The invention changes the transparency parameter of the LCD panel based on luminance distribution information. By adjusting the transparency parameter dynamically according to the captured reference image's luminance characteristics, the system enables single-exposure HDR capture, resolving the contradiction between image quality and power consumption
2Measurement precision
If multiple exposures are performed to capture HDR images, then the HDR image quality is improved, but the image processing complexity increases
Solution Approach 1:
The LCD panel transparency is dynamically adjusted based on the luminance distribution information obtained from the reference image. By making the LCD panel transparent in regions corresponding to bright areas and opaque in regions corresponding to dark areas, the system captures HDR information in a single exposure, eliminating the need for multiple exposures and reducing power consumption while maintaining HDR image quality
Solution Approach 2:
The system performs preliminary action by capturing a reference image first, analyzing its luminance distribution, and adjusting the LCD panel transparency before capturing the target image. This preliminary adjustment enables the target image to directly contain HDR information without requiring subsequent synthesis of multiple images, simplifying the overall image processing workflow
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption by minimizing the number of exposures needed to capture HDR images and simplifies image processing by adjusting the LCD panel transparency to achieve the desired HDR effect without synthesizing multiple images.
Implementation Method 1
The electrochromic glass is controlled to be transparent when the camera module is working such that an external light orderly passes through the LCD panel, the opening, and the transparent electrochromic glass to enter a light incident surface of the camera module
Implementation Method 2
adjusting a transparency of the LCD panel according to the luminance distribution information of the reference image
Data Source
AI summary
A photographing method, a storage medium, and an electronic device (100). The electronic device (100) comprises a display screen (21) and a camera module (22), and the display screen (21) comprises a liquid crystal panel (211), a backlight module (212), and electrochromic glass (213) which are stacked. When an HDR image needs to be captured, image acquisition is performed on a current scene by means of the camera module (22), an acquired image is analyzed, then the light transmittance of the liquid crystal panel (211) is adjusted according to brightness distribution information, and finally, secondary image acquisition is performed by means of the camera module (22) to obtain a target image.