Transparent LED Display Module with Liquid Crystal Light Shielding
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Solution Overview
Problem
Conventional LED advertisements and billboards are not transparent, causing light emission to obstruct views through windows and potentially reversing content when viewed from behind, failing to serve advertising or indicating purposes effectively.
Innovation Solution
A light-emitting module comprising a liquid-crystal module with transparent substrates and a liquid-crystal layer sandwiching an LED component, controlled by a circuit to synchronously shield light emission, allowing viewing through the module while preventing light from disturbing observers on the opposite side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional LED advertisements and billboards are used, then the advertising or indicating effect is achieved, but the transparency is lost and viewing through windows is obstructed
Solution Approach 1:
The patent applies a liquid crystal module that can dynamically change its light-shielding state between transparent and opaque. The liquid crystal module is controlled to switch between allowing light passage and blocking light, enabling the display to be transparent when not in use and opaque when displaying content, thus resolving the contradiction between light emission intensity and transparency
Solution Approach 2:
The patent changes the optical parameter (transparency) of the display medium by using liquid crystal technology. The liquid crystal module alters its optical properties from transparent to opaque state based on control signals, allowing the same medium to satisfy both transparency requirements and light emission requirements at different times
2Device complexity
If LED components are disposed close to the liquid-crystal module, then the structure is compact, but light leakage occurs and disturbs observers on the opposite side
Solution Approach 1:
The patent introduces a transparent cover plate as an intermediary component between the LED component and the liquid crystal module. This cover plate helps to contain and direct the light from the LED, preventing light leakage while maintaining the compact structure. The cover plate acts as a light guide and barrier, allowing the LED to be positioned close to the liquid crystal module without causing harmful light leakage
3Object-generated harmful factors
If the liquid-crystal module synchronously shields light emission, then light interference is prevented, but the response speed requirement increases
Solution Approach 1:
The patent employs periodic switching of the liquid crystal module to synchronously shield light emission from the LED component. By controlling the liquid crystal module to switch at specific intervals and frequencies, the system prevents light interference while managing the response speed requirements. The periodic action allows the liquid crystal to transition between states in a controlled manner, balancing the shielding effectiveness with response time
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
Enables transparent LED displays that allow observers on one side to see through while maintaining the advertising or indicating effect, ensuring uninterrupted viewing of external scenes without light interference.
Implementation Method 1
a liquid-crystal layer disposed between the pair of transparent substrates
Implementation Method 2
a control circuit configured to control an on/off frequency of the liquid-crystal module
Implementation Method 3
a first light-emitting diode (LED) component disposed on a first side of the liquid-crystal module
Implementation Method 4
a first light-emitting frequency of the first LED component
Data Source
AI summary
A light-emitting module includes: (a) a liquid-crystal module containing a pair of transparent substrates and a liquid-crystal layer disposed between the pair of transparent substrates; (b) a first light-emitting diode (LED) component disposed on a first side of the liquid-crystal module; (c) a first transparent cover plate over the first LED component such that the first LED component is sandwiched between the liquid-crystal module and the first transparent cover plate; and (d) a control circuit configured to control an on/off frequency of the liquid-crystal module and a light-emitting frequency of the first LED component in such a manner that the light emitted from the first LED component is synchronously shielded by the liquid-crystal module, wherein the light is emitted from a side opposite to the liquid-crystal module.