OLED Projection Device Optical Path Shifting for Resolution
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Solution Overview
Problem
In projection devices, the existing techniques for shifting the optical path to enhance image resolution result in mixed visual recognition of pre-switch and post-switch images, leading to insufficient writing time and degraded display quality due to line-sequential driving and optical path shifting.
Innovation Solution
A projection device with a display panel using organic light-emitting diodes (OLEDs) and an optical path shift element that shifts the emission path in accordance with control signals, dividing the frame into sub-frames to pseudo-doubling the resolution by shifting the projection pixels in both X and Y directions, ensuring consistent display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical path is shifted by the optical path shift element to increase pseudo resolution, then the resolution is improved, but the display content before and after switching is visually recognized in a mixed manner, degrading display quality
Solution Approach 1:
The frame period is divided into multiple scanning periods, with each scanning period dedicated to writing a specific scanning line. This segmentation ensures that the optical path shift element can shift the optical path to the correct position for each scanning line without causing mixed visual recognition of pre-switch and post-switch images, thereby maintaining display quality while achieving pseudo resolution enhancement.
Solution Approach 2:
The optical path shift element shifts the optical path to the appropriate position before the light emitting elements emit light for each scanning line. This preliminary action ensures that the optical path is correctly positioned in advance, preventing mixed visual recognition and ensuring that each scanning line is displayed at the correct location, thus maintaining display quality while achieving resolution enhancement.
2Reliability
If the optical path is shifted after horizontal scanning is completed, then the image after switching can be visually recognized, but the writing time becomes insufficient, leading to degraded display quality
Solution Approach 1:
The frame period is divided into multiple scanning periods, with each scanning period dedicated to writing a specific scanning line. This segmentation allows the optical path shift element to shift the optical path to the correct position for each scanning line during the writing process, ensuring sufficient writing time for each line while maintaining display quality.
Solution Approach 2:
The optical path shifting and light emission occur continuously throughout the frame period, with each scanning line being written and displayed in sequence. This continuous operation ensures that the writing time for each scanning line is sufficient while maintaining the overall display quality and achieving pseudo resolution enhancement.
3Productivity
If line-sequential driving is used to write scanning lines, then the display panel can be driven efficiently, but the optical path shift causes mixed visual recognition of images before and after switching
Solution Approach 1:
The frame period is divided into multiple scanning periods, with each scanning period dedicated to writing a specific scanning line. This segmentation allows the optical path shift element to shift the optical path to the correct position for each scanning line, preventing mixed visual recognition while maintaining the efficiency of line-sequential driving.
Solution Approach 2:
The optical path shift element shifts the optical path to the appropriate position before each scanning line is written and displayed. This preliminary action ensures that the optical path is correctly positioned in advance for each scanning line, preventing mixed visual recognition and maintaining display quality while preserving the efficiency of line-sequential driving.
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
The solution effectively doubles the resolution of the display panel in both directions, maintaining consistent display quality by ensuring sufficient writing time and avoiding image inconsistency during optical path shifting.
Implementation Method 1
an optical path shift element configured to shift an optical path of light emitted from the plurality of light emitting elements
Implementation Method 2
a display panel including a plurality of light emitting elements configured to emit light in a predetermined direction
Implementation Method 3
A projection device with a display panel using organic light-emitting diodes (OLEDs)
Data Source
AI summary
A projection device includes a display panel including a plurality of OLEDs that emit light in a predetermined direction, and an optical path shift element that shifts an optical path of light emitted from the plurality of light emitting elements. The display panel turns on the plurality of OLEDs in a light emission sub-frame, turns off the plurality of OLEDs in a vertical scanning blanking period, and turns on the plurality of OLEDs in a light emission sub-frame, and the optical path shift element fixes the optical path in the light emission sub-frame and shifts the optical path in the vertical scanning blanking period.