Transparent Display Pixel Layout for Adaptive Dimming Visibility
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Solution Overview
Problem
Conventional transparent display devices face challenges in maintaining visibility of displayed images in high ambient light conditions due to the dominance of external light over light emitted from the light emitting layer, and issues with positional deviations and interference fringes from separate transparent and dimming devices.
Innovation Solution
The transparent display device integrates a TFT substrate with a dimming layer, allowing independent control of light emitting pixels and dimming pixels, reducing the number of glass substrates, and using integrated dimming layers to control transmittance, thereby improving visibility and reducing thickness and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate transparent display device and dimming device are used, then transmittance control is achieved, but positional deviations and interference fringes occur
Solution Approach 1:
The patent combines the transparent display device and dimming device into a single integrated structure where the dimming layer is formed within the same device architecture. The dimming pixels are integrated into the display device substrate, eliminating the need for separate devices and thereby preventing positional deviations and interference fringes while maintaining transmittance control capability
2Adaptability or versatility
If multiple glass substrates are used for transparent display and dimming functions, then functional separation is achieved, but device thickness and weight increase
Solution Approach 1:
The patent integrates both transparent display and dimming functions into a single device structure with shared substrates and common architectural elements. By forming the dimming layer within the same device as the display layer and using shared transparent electrodes and substrates, the overall device weight is reduced while maintaining functional separation through independent control of light emitting pixels and dimming pixels
Solution Approach 2:
The patent creates a multi-functional device where a single structure performs both transparent display and variable transmittance dimming functions. The integrated design allows the same device to simultaneously or independently execute display operations and transmittance control operations, reducing the need for separate dedicated components and thereby reducing overall weight
3Illumination intensity
If external light transmission is prioritized, then transparency is maintained, but image visibility deteriorates in high ambient light
Solution Approach 1:
The patent implements dynamic control of transmittance through independently controllable dimming pixels that can adjust their light transmission properties in real-time. This allows the device to dynamically balance between maintaining transparency for viewing external scenes and reducing transmittance to improve visibility of displayed images in high ambient light conditions, adapting to different operating environments as needed
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 integrated design enhances image visibility by reducing positional deviations and interference fringes, while achieving thickness and weight reduction.
Implementation Method 1
a light emitting layer sandwiched between a pair of transparent electrodes, is capable of displaying an image and character information on a display surface based on light from the light emitting layer
Implementation Method 2
capable of transmitting external light from a back surface toward the display surface
Implementation Method 3
each of the plurality of dimming pixels independently changes transmittance thereof with respect to the visible light
Data Source
AI summary
A transparent display device according to the present disclosure includes a first substrate, an internal layer, and a second substrate. The first substrate is capable of transmitting visible light. The internal layer is provided on a main surface of the first substrate, and includes a plurality of light emitting pixels and a plurality of dimming pixels that are arranged at different positions in plan view. Each of the plurality of light emitting pixels is configured to emit light independently, and each of the plurality of dimming pixels is configured to change transmittance thereof with respect to the visible light independently. The second substrate is provided on a side of the internal layer opposite to the first substrate, and is capable of transmitting the visible light.