Micro-OLED Microlens Layout for Higher Brightness and Lower Color Crosstalk
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Solution Overview
Problem
Micro-OLED displays suffer from low light-emitting brightness, limiting their widespread application.
Innovation Solution
A display module with a color film layer and micro-lens layer, featuring a plurality of first and second converging lenses, where a gap between adjacent first lenses accommodates a second lens connected to the first, enhancing light convergence and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single layer of converging lenses is used, then the structure is simple, but the light convergence effect is insufficient and brightness is low
Solution Approach 1:
The patent divides the lens system into two separate layers: a first converging lens layer and a second converging lens layer. This segmentation allows each layer to independently contribute to light convergence, achieving enhanced brightness without requiring a single complex lens structure. The dual-layer approach resolves the contradiction by distributing the convergence function across multiple simpler components.
Solution Approach 2:
The patent transitions from a single-plane lens arrangement to a three-dimensional stacked configuration with two distinct lens layers at different heights above the display panel. This dimensional change enables light to be converged at multiple optical planes, improving overall convergence efficiency and brightness while maintaining individual lens simplicity.
2Manufacturing precision
If gaps are provided between adjacent first converging lenses, then light convergence precision is improved, but the aperture ratio decreases
Solution Approach 1:
The patent compensates for the aperture reduction caused by gaps in the first lens layer by introducing a second lens layer at a different height. The second layer's lenses are positioned to converge light from regions between the first layer lenses, effectively utilizing the gap spaces and restoring aperture efficiency while maintaining convergence precision.
Solution Approach 2:
The patent merges the functions of two lens layers to achieve both precision and high aperture ratio. The first and second converging lens layers work together as an integrated optical system, where the combined effect of both layers provides precise light convergence while their overlapping coverage areas maintain a high effective aperture ratio.
3Ease of manufacture
If the micro-lens layer structure is simplified, then manufacturing is easier, but color crosstalk between adjacent pixels increases
Solution Approach 1:
The patent uses two separate lens layers to segment the light convergence function, with each layer independently controlling light from specific regions. This segmentation prevents color crosstalk by ensuring that light from one pixel is converged only by its corresponding lens, while maintaining relatively simple individual lens structures that are easy to manufacture.
Solution Approach 2:
The patent implements local quality control by having each lens in the first and second layers specifically positioned to converge light from its corresponding pixel region. This localized convergence function ensures that each pixel's light is precisely directed without interfering with adjacent pixels, reducing color crosstalk while keeping the overall structure manufacturable.
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
Improves display brightness by 1.4-1.6 times within an effective viewing angle, reducing color crosstalk and maintaining high aperture ratio.
Implementation Method 1
a micro-lens layer, provided on a side of the color film layer away from the display panel; where, the micro-lens layer includes a plurality of first converging lenses and a plurality of second converging lenses
Data Source
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AI summary
A display module and a preparation method therefor, and a display device. The display module comprises a display panel (1), a color film layer (4) and a microlens layer (6), wherein the color film layer (4) is arranged on a light-emitting side of the display panel (1), and the color film layer (4) comprises a plurality of light filter portions (4a); the microlens layer (6) is arranged on the side of the color film layer (4) away from the display panel (1), the microlens layer (6) comprises a plurality of first converging lenses (61) and a plurality of second converging lenses (62); a gap (65) is provided between two adjacent first converging lenses (61), an orthographic projection of one first converging lens (61) on the display panel (1) is located in an orthographic projection of one light filter portion (4a) on the display panel (1); the second converging lens (62) is arranged in the gap (65) between the two adjacent first converging lenses (61); and the second converging lens (62) is connected to the first converging lens (61). By means of the microlens layer (6), the brightness of the display module is improved and the cross color thereof is reduced.