Quantum Dot Display Device Shuttering Light Control
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Solution Overview
Problem
Current electronic paper displays face challenges in achieving high light efficiency and color reproduction range, and require a separate polarizing plate, which complicates the process and reduces efficiency.
Innovation Solution
A display device incorporating a quantum dot film and a shuttering driving body that adjusts light wavelengths, eliminating the need for a polarizing plate by controlling light transmission through the movement of the shuttering driving body, thereby enhancing light efficiency and color reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a polarizing plate is used to control light transmission, then light direction can be controlled, but light efficiency is reduced due to absorption
Solution Approach 1:
The patent removes the polarizing plate from the display device structure entirely. Instead of using a polarizing plate to control light transmission, the invention uses a shuttering driving body that moves between contact electrodes to physically block or allow light passage, thereby eliminating the energy loss associated with polarizing plate absorption while maintaining light direction control capability
Solution Approach 2:
The patent replaces the optical mechanism of polarizing plate light control with an electromechanical system. Control electrodes generate electric fields that drive a shuttering body to move mechanically between contact electrodes, using mechanical position changes rather than optical polarization to control light transmission, thus improving light efficiency
2Ease of operation
If a polarizing plate is used for light control, then light transmission can be regulated, but device complexity increases due to alignment requirements
Solution Approach 1:
The patent eliminates the polarizing plate and its associated alignment complexity by extracting this component from the system. The light transmission regulation function is transferred to a shuttering driving body controlled by electric fields from control electrodes, which moves to predetermined positions without requiring complex alignment procedures
Solution Approach 2:
The shuttering driving body automatically positions itself in response to electric fields generated by the control electrodes. The system self-regulates light transmission through the movement of the shuttering body between contact electrodes, eliminating the need for manual or complex automated alignment procedures required by polarizing plates
3Ease of manufacture
If conventional light emission methods are used, then display function is achieved, but color reproduction range is limited
Solution Approach 1:
The patent incorporates a quantum dot film that changes the wavelength parameter of light. The quantum dot film converts light from a broad spectrum source into specific wavelength bands, enabling wide color gamut display while maintaining manufacturing simplicity. This parameter change in light wavelength allows for superior color reproduction without complicating the overall 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 improves light efficiency by eliminating polarizing plate absorption and simplifies the process by removing the need for polarizing plate alignment, while providing a wider light emission surface for natural color representation.
Implementation Method 1
a quantum dot film provided on the first substrate or the second substrate to adjust a wavelength of the light beam transmitted through the shuttering driving body
Implementation Method 2
An electric field driving method corresponds to a method of displaying an image by controlling the positions of conductive microparticles using an electric field generated due to a potential difference between opposing electrodes
Data Source
AI summary
A display device according to an embodiment of the present invention comprises: a first substrate to which external light is applied; a first and a second control electrode disposed on the first substrate, the second control electrode being spaced apart from the first control electrode; an insulating film disposed on the first and the second control electrode; a first and a second contact electrode formed on the insulation film, wherein the first contact electrode at least partially overlaps the first control electrode, and the second contact electrode is spaced apart from the first contact electrode and at least partially overlaps the second control electrode; a shuttering operation body moving between the first and the second contact electrode so as to transmit or block light; a second substrate opposite to the first substrate; and a quantum dot film disposed on the first or the second substrate and adjusting the wavelength of light passing through the shuttering operation body.