Display Device Light Sensing Resin Shielding Layer
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Solution Overview
Problem
Current display devices lack the functionality of sensing light and providing high display quality, convenience, and multifunctionality, particularly in portable information terminals and large display applications.
Innovation Solution
A display device incorporating a light-receiving element and a light-emitting element, with a resin layer and a light shielding layer positioned between substrates, allowing for light sensing and emission while reducing stray light noise and enhancing image-capturing resolution and viewing angle characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light-receiving element is added to the display device, then light sensing capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the light-receiving element and light-emitting element into a single display device structure, sharing common substrates and electrodes. The light-receiving element includes a first pixel electrode, active layer, and common electrode, while the light-emitting element includes a second pixel electrode, light-emitting layer, and common electrode, all integrated between first and second substrates with resin and light shielding layers.
Solution Approach 2:
The display device achieves multi-functionality by incorporating both light emission and light sensing capabilities within the same device structure. The light-emitting element provides display function while the light-receiving element enables touch sensing and ambient light detection, allowing one device to serve multiple purposes.
2Measurement precision
If a resin layer and light shielding layer are positioned between substrates, then stray light noise is reduced, but manufacturing complexity increases
Solution Approach 1:
The resin layer and light shielding layer are strategically positioned only in specific regions where needed. The resin layer includes an opening overlapping with the light-receiving element and a portion overlapping with the light-emitting element, while the light shielding layer covers at least part of the opening and side surfaces of the resin layer, providing localized light management without unnecessary complexity elsewhere.
Solution Approach 2:
The resin layer acts as an intermediary component between the light-emitting and light-receiving elements, providing mechanical support and optical management. The light shielding layer serves as a mediator to block stray light paths, enabling the light-receiving element to accurately detect light without interference from the light-emitting element.
3Measurement precision
If the light shielding layer covers the opening and side surfaces, then light sensitivity is improved, but device complexity increases
Solution Approach 1:
The light shielding layer is designed to preemptively block stray light before it can reach the light-receiving element. By covering at least part of the opening and at least part of the side surfaces of the resin layer, the light shielding layer prevents light from the light-emitting element from interfering with the light-sensing function, ensuring accurate light detection.
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 enables a display device with light sensing capabilities, improved display quality, and increased convenience, reducing noise and enhancing image resolution and viewing angles, thus providing a novel and multifunctional display solution.
Implementation Method 1
a light-receiving element including a first pixel electrode over the first substrate, an active layer over the first pixel electrode, and a common electrode over the active layer
Implementation Method 2
a first light-emitting element including a second pixel electrode over the first substrate, a first light-emitting layer over the second pixel electrode, and the common electrode over the first light-emitting layer
Data Source
AI summary
A display device having a function of sensing light is provided. The display device includes a first substrate, a second substrate, a light-receiving element, a light-emitting element, a resin layer, and a light shielding layer. The light-receiving element, the light-emitting element, the resin layer, and the light shielding layer are each positioned between the first substrate and the second substrate. The light-receiving element includes a first pixel electrode over the first substrate, an active layer over the first pixel electrode, and a common electrode over the active layer. The light-emitting element includes a second pixel electrode over the first substrate, a first light-emitting layer over the second pixel electrode, and the common electrode over the first light-emitting layer. The resin layer and the light shielding layer are each positioned between the common electrode and the second substrate. The resin layer includes a portion overlapping with the light-emitting element. The light shielding layer includes a portion positioned between the common electrode and the resin layer. The resin layer includes a portion overlapping with the light-receiving element or is provided in an island shape. At least part of light passing through the second substrate enters the light-receiving element without through the resin layer.