Transparent Area Pixel Circuit for Camera Display
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Solution Overview
Problem
In organic light emitting display apparatuses, the presence of multiple transistors in each pixel reduces light transmittance, degrading image quality when a camera is mounted in a forward direction, as the transistors in the transparent panel area reduce luminance and affect image capture quality.
Innovation Solution
The apparatus incorporates a first pixel driving circuit with two transistors in the transparent area and a second pixel driving circuit with at least three transistors in the opaque area, optimizing transistor distribution to enhance light transmittance and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transistors (four or more) are included in each pixel of the organic light emitting display panel to prevent luminance deviation, then the reliability of the display is improved, but the light transmittance in the transparent area is reduced, degrading the image quality captured by the camera
Solution Approach 1:
The patent applies different transistor configurations to different regions of the display panel. The transparent area (first pixel region) uses a reduced transistor configuration (two or three transistors) optimized for light transmittance, while the non-transparent area (second pixel region) uses the standard four or more transistors for full luminance stability. This local differentiation resolves the contradiction by allowing each region to have the transistor count appropriate for its specific function.
2Reliability
If the transparent area is implemented with standard pixel driving circuits (four or more transistors), then the luminance stability is maintained, but the amount of light transferred to the camera is reduced
Solution Approach 1:
The patent implements local quality by configuring the first pixel driving circuit in the transparent area with fewer transistors (two or three) compared to the second pixel driving circuit in the non-transparent area (four or more). This regional differentiation allows the transparent area to maximize light transmission to the camera while the non-transparent area maintains full luminance stability, directly resolving the contradiction between light quantity and reliability.
Data Source
AI summary
An organic light emitting display apparatus includes an organic light emitting display panel including a display area, including a transparent area and an opaque area, and a non-display area, a gate driver sequentially supplying a gate pulse to a plurality of gate lines included in the organic light emitting display panel, and an initialization unit transferring gate pulses and/or initialization control signals, output from the gate driver, to a plurality of transparent area gate lines. A camera photographing a region in a forward direction with respect to the organic light emitting display panel is provided in the transparent area of a rear surface of the organic light emitting display panel. A first pixel driving circuit provided in the transparent area includes two transistors, and a second pixel driving circuit provided in the opaque area includes at least three transistors.