Backlight Circuit With Electrodeposited Reflectors for Viewing Angle Switching
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Solution Overview
Problem
Current LCD panels struggle to dynamically adjust viewing angles between wide and narrow settings for enhanced privacy and image quality, often requiring dual cells or external grating devices that reduce light utilization and increase panel thickness.
Innovation Solution
A backlight circuit with electron microscope assemblies, comprising transparent electrode shields, electrolytes with metal ions, and electrode plates, which form reflective films under controlled electric fields to switch between collimated and scattered light modes, enabling adjustable viewing angles without blocking or absorbing light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual cells or external grating devices are used to achieve peep-proofness, then viewing angle control is improved, but light utilization decreases and panel thickness increases
Solution Approach 1:
The patent replaces mechanical/optical structures (dual cells, external gratings) with an electric field-controlled system. The electrolyte's optical properties are controlled by applying electric fields, causing metal ions to migrate and form reflective films that control light direction. This substitution eliminates the need for complex mechanical structures while improving light utilization efficiency.
Solution Approach 2:
The patent changes the optical parameters of the electrolyte by controlling electric field application. By adjusting the electric field state, the electrolyte transitions between different optical configurations, enabling dynamic control of light emission patterns (collimated vs. scattered) and achieving viewing angle control without physical structure changes.
2Adaptability or versatility
If dual cells or external grating devices are used to achieve peep-proofness, then viewing angle control is improved, but panel thickness increases
Solution Approach 1:
The patent merges the viewing angle control function directly into the backlight circuit structure by integrating electron microscope assemblies within the existing panel layers. This consolidation eliminates the need for separate external grating devices or dual cell structures, achieving peep-proofness while maintaining compact panel thickness.
Solution Approach 2:
The patent employs thin-film structures (transparent electrode shields, electrode plates, and electrolyte layers) to achieve the viewing angle control function. These thin-film components replace bulky mechanical structures, enabling effective peep-proofness with minimal increase in panel thickness.
3Adaptability or versatility
If traditional methods are used for viewing angle control, then peep-proofness is achieved, but image quality and transmittance deteriorate
Solution Approach 1:
The patent introduces an electrolyte as an intermediary medium between the light source and the viewing environment. The electrolyte, controlled by electric fields, acts as a dynamic optical element that can modulate light transmission and reflection properties, achieving peep-proofness while preserving image quality and transmittance through controlled optical interaction rather than simple blocking.
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 solution enhances light utilization, maintains image quality, and reduces panel thickness by dynamically controlling light emission to achieve peep-proof and shared displaying modes, improving contrast and transmittance compared to traditional methods.
Implementation Method 1
under the action of the first electric fields, the metal ions of the electrolytes are capable of forming first metal reflective films on the surfaces of the electrode plates
Implementation Method 2
under the action of the second electric fields, the metal ions of the electrolytes are capable of forming second metal reflective films on the surfaces of the transparent electrode shields
Implementation Method 3
light emitted from the light-emitting chips is reflected by the first metal reflective films, such that divergent light is emitted toward the driving substrate
Implementation Method 4
light emitted from the light-emitting chips is reflected by the second metal reflective films, such that parallel collimated light is emitted toward the driving substrate
Data Source
AI summary
A backlight circuit includes a lamp panel and a plurality of electron microscope assemblies. The lamp panel includes a driving substrate and a plurality of light-emitting chips on one side of the driving substrate. The electron microscope assemblies are disposed on first sides, away from the driving substrate, of the light-emitting chips in a one-to-one correspondence manner. Each electron microscope assembly includes a transparent electrode shield, an electrolyte, and an electrode plate. The transparent electrode shields are disposed on a first side of the driving substrate. The light-emitting chips are positioned in the transparent electrode shields. The electrode plates are disposed on first sides, away from the driving substrate, of the transparent electrode shields. The electrolytes are filled between the transparent electrode shields and the electrode plates.