Transparent LCD Switching for Independent Two-Sided Information Display
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Solution Overview
Problem
Existing transparent liquid crystal display devices often display the same image on both sides, leading to inappropriate information display on one surface when viewed from the opposite side, making it difficult for users to recognize characters or images clearly.
Innovation Solution
A transparent liquid crystal display device with a control unit that alternates display periods between a first and second display unit, allowing independent control of image visibility on each surface by transitioning between transparent and black states, ensuring appropriate information is displayed on both sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same image is displayed on both surfaces of a transparent liquid crystal display device, then the display structure is simple, but the information displayed is inappropriate for one surface when viewed from the opposite side
Solution Approach 1:
The display device is divided into two independent display units (first display unit and second display unit), each capable of displaying different information on opposite surfaces. This segmentation allows each surface to show appropriate information for its viewing direction while maintaining independent control.
Solution Approach 2:
The display device dynamically switches between different display states (transparent state and black display state) based on viewing requirements. The control unit alternates the state of each display unit to ensure that appropriate information is displayed on each surface at different times, resolving the contradiction between structural simplicity and information appropriateness.
2Measurement precision
If characters are displayed on one side of a transparent display, then the character image is recognizable from that side, but it is difficult to recognize the character from the opposite side
Solution Approach 1:
The control unit implements periodic switching between first display periods and second display periods. During the first display period, the first display unit shows characters in a recognizable format while the second display unit displays black. During the second display period, the roles are reversed. This periodic action ensures that characters are always displayed in an appropriate orientation for the current viewing side.
Solution Approach 2:
The display system dynamically adjusts which display unit is active and what information is displayed based on the desired viewing direction. This dynamic control allows the same physical device to adapt to different viewing requirements, maintaining high character recognition accuracy from either side.
3Productivity
If high-speed switching between transparent and black states is performed, then different information can be displayed on both surfaces simultaneously, but the device complexity increases
Solution Approach 1:
The patent combines the transparent liquid crystal display unit with two additional display units (first and second display units) that share a common substrate structure. This merging approach allows high-speed switching and bidirectional display capability while reducing overall device complexity through shared components and integrated control.
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 simultaneous and clear display of different information on both surfaces by high-speed switching, allowing users on either side to see distinct images or text without interference.
Implementation Method 1
a display layer that is disposed between the first substrate and the second substrate and transitions between a transparent state in which light is transmitted and a display state in which information is displayed
Implementation Method 2
In the first display unit, one surface of a substrate is disposed on the first surface, and transition for an area that covers the display area is performed between a black display state in which black is displayed and a transparent state in which light is transmitted
Data Source
AI summary
There is provided a transparent liquid crystal display device including a transparent liquid crystal display, two TN liquid crystal displays, and a general controller. The general controller performs display control to repeat a first display period and a second display period. In the first display period, the general controller displays first information to be displayed on a first surface side on the transparent liquid crystal display, causes one TN liquid crystal display to transition to a transparent state, and causes the other TN liquid crystal display to transition to a black display state. In the second display period, the general controller displays second information to be displayed on a second surface side on the transparent liquid crystal display, causes the one TN liquid crystal display to transition to the black display state, and causes the other TN liquid crystal display to transition to the transparent state.