OLED Field-Sequential Display Panel Backlight Lifespan
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Solution Overview
Problem
Field-sequential liquid crystal display apparatuses using LED lamps as backlights face reduced LED lifespan due to constant switching, affecting display performance.
Innovation Solution
A field-sequential display panel and apparatus utilizing OLED light sources with multiple groups of trichromatic light sources, each comprising a red, green, and blue sub-light source, to provide trichromatic light without a color filter layer, allowing precise control of light emission and deflection of liquid crystal molecules for improved display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LED lamp is used as backlight in field-sequential display, then color display is achieved, but LED lifespan is greatly reduced due to constant switching
Solution Approach 1:
The backlight is segmented into multiple independent color light sources (red, green, blue LED chips) arranged in an array, where each color light source can be independently controlled and switched. This segmentation allows the system to achieve color display while reducing the switching frequency and duration for each individual LED chip, thereby extending their operational lifespan.
2Adaptability or versatility
If LED lamp switches constantly to achieve field-sequential color display, then color display performance is improved, but display reliability deteriorates
Solution Approach 1:
Multiple color light sources (red, green, blue LED chips) are merged into a single backlight assembly that functions as an integrated field-sequential display system. By combining these light sources in close proximity and controlling them through a unified driving circuit, the system achieves versatile color display while maintaining stable and reliable operation through coordinated control.
3Device complexity
If no color filter layer is used in field-sequential display, then device complexity is reduced, but light source reliability becomes critical
Solution Approach 1:
The backlight assembly employs different types of LED chips (red, green, blue) with specific local characteristics arranged in a structured pattern. Each color LED chip has optimized properties for its specific wavelength, and their spatial arrangement creates localized color zones that collectively provide full-color display capability without requiring color filter layers, thus maintaining structural simplicity while ensuring light source reliability.
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 extends OLED light source lifespan, enhances display flexibility and brightness control, and improves overall display effect by avoiding the drawbacks of LED lamps, resulting in better performance and longer OLED light source life.
Implementation Method 1
an OLED light source arranged at one side of the base substrate facing away from the thin film transistor to provide trichromatic light for the pixel cells, the OLED light source includes multiple groups of trichromatic light sources, each of the groups of trichromatic light sources includes a first color sub-light source, a second color sub-light source and a third color sub-light source
Implementation Method 2
liquid crystal molecules corresponding to the pixel cell are controlled to deflect a predetermined angle in a time-sharing mode
Data Source
AI summary
A field-sequential display panel, a field-sequential display apparatus and a driving method are provided. The field-sequential display apparatus includes a liquid crystal display panel and an OLED light source arranged at one side of the liquid crystal display panel where light is incident to provide trichromatic light for pixel cells of the liquid crystal display panel. The OLED light source includes multiple groups of trichromatic light sources, each of the groups of trichromatic light sources includes a first color sub-light source, a second color sub-light source and a third color sub-light source, and each sub-light source includes an anode, a cathode and a light emitting layer between the anode and the cathode.