Rear-Mounted Sensor Package for Thin OLED Bezel
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Solution Overview
Problem
The application of a narrow bezel in organic light-emitting display devices is limited due to the need for holes in the bezel area to accommodate sensors, which occupies valuable display space and restricts the thinness of the bezel.
Innovation Solution
Incorporating a sensor package module on the rear surface of the display panel, with a transmission area allowing external light to pass through and a non-transmission area with lower light transmittance, reducing the number of conductive films in the transmission area to minimize bezel thickness without the need for holes in the bezel area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If holes are perforated in the bezel area to accommodate sensors, then sensor functionality is achieved, but the bezel thickness increases and display area is reduced
Solution Approach 1:
The patent moves the sensor package from the traditional bezel area to the rear surface of the display panel, utilizing the third dimension (depth) rather than occupying horizontal bezel space. This allows sensors to be positioned in a location that does not interfere with the front display area or require holes in the bezel, thereby maintaining thin bezel design while preserving sensor functionality.
Solution Approach 2:
The sensor package module is integrated within the display panel structure itself, nested on the rear surface rather than being an external add-on. This nesting approach allows the sensor functionality to be incorporated into the existing display device architecture without requiring additional space in the bezel area, solving the contradiction between sensor placement and bezel thickness.
2Ease of operation
If holes are perforated in the bezel area to accommodate sensors, then sensor functionality is achieved, but the display area is reduced
Solution Approach 1:
By relocating sensors to the rear surface of the display panel, the invention utilizes the vertical dimension to accommodate sensors without compromising the horizontal display area. This dimensional shift eliminates the need for holes in the bezel that would reduce the effective display area, while maintaining full sensor functionality.
Solution Approach 2:
The sensor package is extracted from the bezel area and relocated to the rear surface of the display panel. This extraction removes the conflict between sensor placement and display area, as sensors are now positioned in a location that does not overlap with or reduce the front display area.
3Illumination intensity
If the number of conductive films is reduced in the transmission area, then light transmittance is improved, but electrical conductivity may be compromised
Solution Approach 1:
The patent applies different numbers of conductive films in different areas of the display panel: fewer conductive films in the transmission area where high light transmittance is needed, and the full stack of conductive films in the non-transmission area where electrical functionality is prioritized. This local differentiation allows each area to optimize for its specific function without compromising overall device performance.
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 enables a thinner bezel by allowing light to pass through designated areas on the display panel, eliminating the need for holes in the bezel and enhancing the display's thinness while maintaining sensor functionality.
Implementation Method 1
a display panel having a transmission area through which external light passes
Data Source
AI summary
An organic light-emitting display device comprises a display panel having a transmission area through which external light passes, and a non-transmission area having transmittance lower than that of the transmission area; a data driver supplying a data signal to the display panel; a gate driver supplying a gate signal to the display panel; a timing controller controlling the data driver and the gate driver; and a sensor package module disposed on a rear surface of the display panel and disposed to correspond to the transmission area, wherein the number of conductive films stacked in the transmission area is smaller than that of conductive films stacked in the non-transmission area.