OLED Pixel Structure With Selective Reflective Layer for Under-Display Cameras
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Solution Overview
Problem
In electronic devices with a display device and a camera on the same surface, the display region overlapping the camera experiences insufficient luminance due to the organic EL elements being positioned to obstruct light emission.
Innovation Solution
A reflective layer is strategically placed to face certain organic EL elements in the display panel, improving luminance in some pixels while allowing sufficient light transmission for the camera by omitting the reflective layer in other pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflective layer is added to improve display luminance, then display brightness is enhanced, but light transmission to the camera is blocked
Solution Approach 1:
The display panel is divided into two distinct regions: a first region with a reflective layer for high luminance display, and a second region without a reflective layer for camera light transmission. This spatial segmentation allows each region to fulfill its specific function without interfering with the other.
Solution Approach 2:
Different structural configurations are applied to different regions of the display panel. The first region (display area) has a reflective layer for enhanced luminance, while the second region (camera area) lacks a reflective layer to maintain light transmission. Each region's structure is optimized for its local function.
2Area of stationary object
If the display region is enlarged to overlap the camera, then display area is increased, but luminance becomes insufficient in overlapping pixels
Solution Approach 1:
The display panel is segmented into a first region containing pixels that overlap with the camera and a second region containing pixels that do not overlap. The first region is further divided into a first area (with reflective layer) and a second area (without reflective layer), allowing differentiated luminance optimization based on camera overlap status.
Solution Approach 2:
Pixels in the first region that overlap with the camera are configured without a reflective layer to ensure sufficient light transmission to the imaging element, while pixels in the second region are configured with a reflective layer to maximize display luminance. This local differentiation resolves the luminance insufficiency problem in overlapping areas.
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
Enhances display luminance without compromising camera functionality by optimizing light emission and transmission based on pixel positioning.
Implementation Method 1
A reflective layer is strategically placed to face certain organic EL elements in the display panel, improving luminance in some pixels
Implementation Method 2
a display device having an organic electroluminescence (EL) element
Implementation Method 3
an imaging element included in the camera is configured to receive light via the organic EL display device
Data Source
AI summary
According to one embodiment, an electronic apparatus includes a display panel in which a first pixel including a first light emitting element configured to emit light of a first color, a second pixel including a second light emitting element configured to emit light of a second color, and a third pixel including a third light emitting element configured to emit light of a third color are arranged, and an imaging element configured to receive light via the display panel. The first to third pixels are disposed at positions overlapping the imaging element. The display panel includes a reflective layer that is not formed at a position facing the first light emitting element, and is formed at positions facing the second and third light emitting elements.