Display Panel Pixel Luminance Control for Camera Interference
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Solution Overview
Problem
Interference between light emitted from pixels in a display area and light reflected from a subject can deteriorate the quality of images captured by a camera, especially when the camera's sensitivity is increased during night shooting or when pixels with high luminance are involved.
Innovation Solution
A display device with a panel driver that controls the luminance of pixels in the display area overlapping the camera, reducing or turning off these pixels during image capture to minimize interference, and includes a camera driver to coordinate image capture with the panel driver, utilizing a timing controller and data driver to generate appropriate signals for the pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera sensitivity is increased during night shooting, then the image capture capability is improved, but the interference between pixel-emitted light and camera-received light becomes stronger, deteriorating image quality
Solution Approach 1:
The panel driver receives photographing time information from the camera driver in advance and controls the pixels to be in an off state or emit light with reduced luminance before the camera captures the image. This preliminary action prevents light interference from occurring in the first place, allowing the camera to operate at high sensitivity without image quality deterioration.
2Illumination intensity
If pixels in the display area overlapping the camera emit light with high luminance, then the display quality is improved, but the interference with camera-received light increases, deteriorating image quality
Solution Approach 1:
The system dynamically adjusts pixel luminance based on operational context. The panel driver controls pixels in the overlapping area to emit light with reduced luminance or turn them off completely when photographing time information is received, while maintaining normal luminance at other times. This dynamic adjustment resolves the contradiction between display quality and image capture quality.
3Measurement precision
If the panel driver controls luminance of pixels during image capture, then the image quality is improved, but the device complexity increases due to additional control circuits
Solution Approach 1:
The panel driver integrates multiple functions: it drives the pixels for display and simultaneously receives photographing time information from the camera driver to control pixel luminance. By merging the pixel driving function with the luminance control function in a single circuit, the patent avoids adding separate complex control systems while still achieving image quality improvement.
Data Source
AI summary
A display device of the present inventive concept includes: a display panel include a first display area including a first pixel area in which first pixels are disposed and a transmissive area in which no pixel is disposed, and a second display area including a second pixel area in which second pixels are disposed; a panel driver configured to supply an analog data signal to the first and second pixels; and a camera configured to include at least one camera module for capturing an image and disposed to overlap the first display area of the display panel. The panel driver controls luminance of at least some of the first pixels in the first display area at a first time point at which the at least one camera module captures an image.