Pixel Light Emitter and Color Converter Spacing for Display Devices
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Solution Overview
Problem
Display devices experience undesirable light interference between adjacent pixels, affecting image quality and color accuracy.
Innovation Solution
The design includes a configuration where the distance between light emitters and their corresponding color converters is optimized using the equation y=x×tan θ1, where θ1 is the complementary angle to the angle between the light emitting face and a line connecting it to a point away from the perpendicular, ensuring minimal light interference by using quantum dots and a transmissive layer, along with encapsulation and light blocking layers to manage light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between adjacent light emitters is reduced to increase pixel density, then the resolution and pixel density are improved, but light interference between adjacent pixels increases causing color contamination and reduced image quality
Solution Approach 1:
A light blocker is introduced as an intermediary element positioned between adjacent light emitters. This light blocker intercepts and blocks stray light from one pixel before it can reach the color converter of an adjacent pixel, thereby preventing color contamination while allowing the pixels to be positioned closer together for higher density
Solution Approach 2:
The solution moves from a two-dimensional planar arrangement to a three-dimensional structure by extending the light blocker vertically above the color converter. This vertical dimension allows the light blocker to intercept light paths without increasing the horizontal footprint, enabling closer pixel spacing while maintaining isolation
2Manufacturing precision
If a light blocker is added to prevent light interference, then color accuracy is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The light blocker is merged with the encapsulation layer structure, where the encapsulation layer serves dual purposes: protecting the light emitter and providing the light-blocking function. This integration reduces the number of separate components and simplifies the manufacturing process
Solution Approach 2:
The encapsulation layer is given multiple functions: it provides mechanical protection for the light emitter, seals the device, and simultaneously acts as a light blocker to prevent color contamination. This multi-functionality reduces overall device complexity by eliminating dedicated light-blocking components
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
This configuration minimizes light interference between adjacent pixels, enhancing color reproducibility and reducing unwanted light effects, thereby improving the overall image quality and color accuracy in display devices.
Implementation Method 1
The first color converter may include a first plurality of quantum dots, and the second color converter may include a second plurality of quantum dots
Data Source
AI summary
A display device is disclosed. The display device may include a first pixel and a second pixel. The first pixel may include a first light emitter and a first color converter overlapping the first light emitter. The second pixel may immediate neighbor the first pixel, may include a second light emitter and a second color converter overlapping the second light emitter. When a distance between the first light emitter and the second light emitter is x and a distance between the first light emitter and the first color converter is y, the following equation is satisfied:y=x×tan θ1 wherein θ1 is (90−θ), and the θ is an included angle between a line perpendicular to a light emitting face of the first light emitter at a point of the light emitting face and a line connecting the point of the light emitting face to any point away from the line perpendicular to the light emitting face, the θ has a range of an angle corresponding a luminance ratio value in the range of 1% with respect to the light emitted from the first light emitter to an angle corresponding a luminance ratio value in the range of 15% with respect to the light emitted from the first light emitter.