Lateral Color Filter Arrangement for Silicon OLED Viewing Angle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Silicon-based OLED display devices face challenges with color deviation and color mixing under large viewing angles due to their high pixel density, which affects display quality.
Innovation Solution
A display device design featuring a substrate with light-emitting elements arranged in an array and a color filter layer, where the distance between light-emitting elements and the color filter layer is optimized to create a color deviation prevention viewing angle, using a combination of inorganic and organic encapsulation layers to manage refractive indices and prevent color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high pixel density is adopted to achieve small size and high resolution, then display resolution is improved, but color deviation and color mixing occur under large viewing angles
Solution Approach 1:
The patent introduces a new spatial dimension by positioning the color filter layer laterally adjacent to the light-emitting elements rather than directly above them. This lateral arrangement creates a geometric relationship where the color filter for one pixel is positioned next to adjacent pixels, preventing color mixing when viewed from oblique angles while maintaining high pixel density for high resolution display.
Solution Approach 2:
The patent applies different spatial configurations to different components: light-emitting elements maintain their high-density array arrangement for resolution, while color filter units are positioned in adjacent lateral regions rather than directly above. This local differentiation allows each pixel to maintain its light-emitting function while preventing color interference from adjacent pixels at oblique viewing angles.
2Length of stationary object
If color filter layer is positioned close to light-emitting elements, then device thickness is reduced, but color mixing between adjacent pixels increases
Solution Approach 1:
The patent repositions the color filter layer from a vertical stacking arrangement (directly above light-emitting elements) to a lateral arrangement (adjacent to light-emitting elements). This dimensional change allows the color filters to be positioned close to the light-emitting elements in the lateral direction without causing vertical color mixing, thus reducing device thickness while preventing color mixing between adjacent pixels.
3Adaptability or versatility
If viewing angle is increased for wider display coverage, then field of view is improved, but color deviation occurs
Solution Approach 1:
By arranging color filter units laterally adjacent to light-emitting elements rather than directly above them, the patent creates a geometric configuration where oblique viewing rays from wide angles do not cause color filters to intercept light from adjacent pixels. This lateral arrangement maintains color accuracy across wide viewing angles by preventing cross-pixel color interference.
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 prevents color deviation and mixing under large viewing angles, enhancing display quality by maintaining high pixel density while ensuring accurate color representation.
Implementation Method 1
a refractive index of the first inorganic encapsulation layer is greater than a refractive index of the second inorganic encapsulation layer... a refractive index of the first thin film encapsulation layer is greater than a refractive index of the second thin film encapsulation layer
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2B
AI summary
A display device, an electronic equipment, and a manufacture method for manufacturing the display device are provided. The display device includes: a substrate, a plurality of light-emitting elements arranged in an array, the plurality of light-emitting elements including a first light-emitting element and a second light-emitting element; and a color filter layer. In a direction perpendicular to the substrate, a distance between the plurality of light-emitting elements and the color filter layer is a first distance; the display device has a color deviation prevention viewing angle on a reference plane determined by the first direction and a second direction perpendicular to the surface of the substrate; the color deviation prevention viewing angle is, along a cross-section by the reference plane, an angle between a connection line and the direction perpendicular to the substrate, the connection line connects a side of the first light-emitting element close to the second light-emitting element and a side of a color filter unit, which corresponds to the second light-emitting element, close to the first light-emitting element; and the first distance is configured to enable the color deviation prevention viewing angle to be greater than a preset angle. The display device can avoid the problem of color deviation generated under a larger viewing angle while having a high PPI, improve the display quality of the display device, and improve the user experience.