Quantum Dot Display Bridge Portion Vertical Light Guidance
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Solution Overview
Problem
Quantum dot display devices with complex films have low color conversion efficiency due to insufficient optical paths, leading to decreased luminance, and increased thickness and production complexity.
Innovation Solution
A quantum dot display device with a light emitting unit and a color conversion unit that includes a quantum dot portion, a bridge portion with alternating bridge areas and air gaps for vertical light guidance, and a prism portion to enhance light efficiency by converting scattering light to vertical light, modularized through mutual coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a quantum dot film is used in a backlight unit, then color reproduction capability is improved, but color conversion efficiency decreases due to scattering light from insufficient optical path
Solution Approach 1:
The patent introduces a bridge portion with a specific height (H) that creates a vertical optical path dimension. This vertical guidance structure converts scattering light into vertically directed light, extending the optical path in the vertical dimension to improve color conversion efficiency while maintaining color reproduction capability.
Solution Approach 2:
The bridge portion acts as an intermediary element between the quantum dot film and the prism portion. It provides a controlled optical path that guides light vertically through the quantum dot layer, enabling efficient color conversion by mediating the interaction between incident light and quantum dots.
2Loss of energy
If quantum dot concentration of the quantum dot film is increased for color conversion, then color conversion efficiency is improved, but luminance decreases
Solution Approach 1:
By creating a vertical optical path through the bridge portion with height H, the patent extends the interaction distance between light and quantum dots in the vertical dimension. This allows for improved color conversion efficiency without requiring excessive quantum dot concentration, thereby preserving luminance.
3Illumination intensity
If multiple films are used in the backlight unit including quantum dot film, then color reproduction capability is improved, but device thickness and production complexity increase
Solution Approach 1:
The patent merges the quantum dot film, bridge portion, and prism portion into an integrated color conversion unit. This consolidation reduces the number of separate films and components in the backlight unit while maintaining excellent color reproduction capability, thereby simplifying the overall device structure and production process.
Solution Approach 2:
The bridge portion serves multiple functions: it provides vertical light guidance, creates an extended optical path for color conversion, and structurally connects the quantum dot film to the prism portion. This multi-functionality reduces the need for separate components, simplifying the device structure.
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 enhances luminance and light efficiency by providing a sufficient color conversion path, contributing to improved color reproduction and reducing the thickness and complexity of the display device.
Implementation Method 1
a quantum dot portion configured to convert the light to the color light
Implementation Method 2
a bridge portion configured to provide a color conversion path of the light passing the quantum dot portion and to vertically guide the light
Implementation Method 3
a prism portion configured to guide the light passing the bridge portion to an outside
Data Source
AI summary
Disclosed is a quantum dot display device including a light emitting unit configured to generate a light; and a color conversion unit configured to convert the light generated from the light emitting unit to a color light. The color conversion unit includes a quantum dot portion configured to convert the light to the color light; a bridge portion configured to provide a color conversion path of the light passing the quantum dot portion and to vertically guide the light; and a prism portion configured to guide the light passing the bridge portion to an outside. The above configuration may enhance the light efficiency by providing a sufficient color conversion path of light.