Under-Display Camera Black-Frame Timing for Image Quality
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Solution Overview
Problem
In under-display camera (UDC) technology, the image sensor adjacent to the display is affected by light from the display's light-emitting body, leading to degraded image quality.
Innovation Solution
A black frame with a designated pixel value is generated and displayed to block light from the display's organic body, allowing the image sensor to capture high-resolution images by timing the capture with the display of this frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the image sensor is positioned adjacent to the display to increase screen ratio and enable under-display camera functionality, then the screen ratio is improved and bezel is minimized, but light from the display's light-emitting body enters the image sensor causing serious image quality degradation
Solution Approach 1:
A black frame is displayed on the display panel before the image sensor captures the image. This preliminary action blocks light from the light-emitting body from entering the image sensor during the capture moment, preventing image quality degradation while maintaining the under-display camera configuration
Solution Approach 2:
The black frame serves as a preliminary countermeasure that actively prevents the harmful effect of light from the light-emitting body from affecting the image sensor. By displaying the black frame at the appropriate timing, the system counteracts the potential image quality degradation before it occurs
2Illumination intensity
If the display has an increased light-emitting body to improve display performance, then display quality is improved, but more light is directed into the image sensor positioned at the lower end of the display
Solution Approach 1:
The black frame is displayed periodically or at specific moments (e.g., during still image capture) rather than continuously. This timing-based approach allows the display to maintain high quality during normal operation while blocking light from reaching the image sensor only when needed for image capture
Solution Approach 2:
The black frame is displayed in advance or at the precise moment before image capture begins, preparing the optical path to block harmful light before it can interfere with the image sensor, while allowing the display to maintain its light-emitting performance during non-capture periods
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 method prevents unnecessary light from reaching the image sensor, enabling high-resolution image capture by distinguishing between preview and still shots and ensuring optimal image quality.
Implementation Method 1
A black frame with a designated pixel value is generated and displayed to block light from the display's organic body
Data Source
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AI summary
An electronic device, according to various embodiments, may comprise: a memory; a display panel; a display driver integrated circuit operatively connected to the display panel; an image sensor disposed on the bottom end of the display panel; and a processor operatively connected to the image sensor. The display driver integrated circuit is operatively connected to the display panel and the processor so as to detect the outputting of a first frame on the display panel and be capable of transmitting a first signal to the processor when the first frame is outputted on the display panel. The processor may control so as to: in accordance with a shoot command inputted from a user, generate the first frame which has a predetermined pixel value; output the first frame through the display panel; and when the first signal is received from the display driver integrated circuit, capture an image through the image sensor and store the captured image in the memory.