Display Module Light-Transmitting Body Refractive Index Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing display modules have limitations due to camera module field angle, display frame, and display thickness, resulting in larger openings that reduce the screen-to-body ratio in mobile electronic devices.
Innovation Solution
A display module design incorporating a light-transmitting body with a higher refractive index and a spacer layer with a lower refractive index, arranged to refract light twice, reducing the opening size and increasing the screen-to-body ratio by altering the light path, while using a cover plate, optical adhesive layer, and light-shielding layers for structural integrity and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large diameter opening is provided on the screen to accommodate the camera module, then the camera module can be properly installed and function, but the screen-to-body ratio is reduced
Solution Approach 1:
The patent changes the refractive index parameter of the medium in the optical path by introducing a light-transmitting body with refractive index n2 between the cover plate (n1) and camera module (n3), where n2 ≥ n1 and n2 > n3. This parameter change enables smaller opening diameter while maintaining the same field angle, thus resolving the contradiction between camera installation requirements and screen-to-body ratio.
Solution Approach 2:
The patent applies local quality by creating a localized optical structure (light-transmitting body) with specific refractive index properties only in the region where light passes from the cover plate to the camera module. This localized modification of optical properties allows the opening to be smaller without affecting the overall screen design or camera functionality.
2Area of stationary object
If the opening diameter is reduced to increase screen-to-body ratio, then the aesthetic appearance is improved, but the camera module's field angle is limited
Solution Approach 1:
By changing the refractive index parameter in the optical path through the light-transmitting body, the patent achieves smaller opening diameter while maintaining constant field angle. The specific refractive index relationship (n2 ≥ n1 and n2 > n3) ensures that light refraction compensates for the reduced opening size, preserving the camera's field angle.
3Length of stationary object
If the display thickness is reduced to achieve thinner device profile, then the device portability is improved, but the optical path length for the camera module is insufficient
Solution Approach 1:
The patent uses refractive index parameter changes to extend the effective optical path length within a reduced physical thickness. The light-transmitting body with higher refractive index (n2) allows light to travel a longer optical distance through a shorter physical distance, enabling thinner display design while maintaining sufficient optical path for the camera module.
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 design effectively reduces the opening diameter and enhances the screen-to-body ratio by refracting light twice, maintaining the camera's field angle, and improves imaging quality by preventing stray light interference.
Implementation Method 1
a light-transmitting body disposed in the opening, the light-transmitting body having a second refractive index; wherein the light-transmitting body includes a first end surface and a second end surface opposite to each other, the first end surface overlaps the cover plate, and the second end surface overlaps the spacer layer, wherein the second refractive index is greater than or equal to the first refractive index, and the second refractive index is greater than the third refractive index
Implementation Method 2
a spacer layer disposed between the external camera module and the light-transmitting body, the spacer layer having a third refractive index; wherein the third refractive index is smaller than the first refractive index
Data Source
AI summary
The present application provides a display module and a display device, wherein a display panel is provided with an opening; a cover plate covers the display panel and has a first refractive index; a camera module is disposed corresponding to the opening; a light-transmitting body is disposed in the opening and has a second refractive index; and a spacer layer is disposed between the external camera module and the light-transmitting body and has a third refractive index, wherein the second refractive index is greater than or equal to the first refractive index, and the second refractive index is greater than the third refractive index.