Double-Sided Display Device Using Segmented Pixel Overlap Area
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing double-sided display devices face challenges with thickness and power consumption due to the use of stacked LCD and OLED panels, and the display quality is affected by the brightness of the OLED light source.
Innovation Solution
A double-sided display device is designed with a first OLED display panel and a second LCD display panel, where a pixel overlap area with opaque and transparent sections is used to manage light emission, allowing light from the OLED panel to pass through and display images on both sides while minimizing thickness and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If one OLED panel is replaced with an LCD panel and the backlight module is removed to reduce thickness, then the thickness is reduced, but the display effect of the LCD panel is affected by the brightness of the OLED light source
Solution Approach 1:
The pixel overlap area is divided into multiple transparent sections and opaque sections. The transparent sections allow light transmission for double-sided display, while the opaque sections block light to prevent brightness interference with the LCD panel display quality.
Solution Approach 2:
Different regions of the pixel overlap area are assigned different optical properties (transparent or opaque) based on their functional requirements. This local differentiation allows the structure to simultaneously achieve light transmission where needed and light blocking where interference must be prevented.
2Illumination intensity
If two OLED display panels are stacked to achieve double-sided display, then display quality is improved, but power consumption and thickness increase
Solution Approach 1:
The OLED panel serves multiple functions: it acts as the light source for the front display and simultaneously serves as the backlight source for the LCD panel on the opposite side. This multi-functionality eliminates the need for a separate backlight module, reducing power consumption and thickness.
Solution Approach 2:
The OLED panel and LCD panel are combined in a stacked configuration where the OLED panel's light emission function is shared by both display surfaces. The pixel overlap area with transparent and opaque sections enables this merged structure to function efficiently for double-sided display.
3Length of stationary object
If the backlight module of the LCD panel is removed to reduce thickness, then thickness is reduced, but the LCD panel lacks sufficient backlight control
Solution Approach 1:
The OLED panel automatically serves as the backlight source for the LCD panel, eliminating the need for a separate backlight module. The OLED's inherent light emission capability provides the necessary backlighting, and the pixel overlap area's transparent sections allow this light to reach the LCD panel effectively.
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 improves the quality of double-sided display images by optimizing light usage, reducing the thickness and power consumption of the device, and preventing the OLED light source from negatively affecting the display of the second panel.
Implementation Method 1
The first display panel includes an organic light-emitting layer, and the organic light-emitting layer emits light in a first direction and a second direction
Implementation Method 2
The pixel overlap area is divided into a plurality of opaque sections and a plurality of transparent sections. The light in the first direction displays the front side image on the display surface of the first display panel. The light in the second direction passes through the transparent section of the pixel overlap area
Data Source
AI summary
A double-sided display device and a driving method of the double-sided display device are disclosed. The double-sided display device includes a first display panel and a second display panel for displaying a front side image and a back side image of the double-sided display device respectively. A pixel overlap area is disposed between the first display panel and the second display panel. The pixel overlap area is divided into multiple opaque sections and transparent sections. The first display panel includes an organic light-emitting layer that emits light in the first direction and the second direction in opposite directions. The light in the first direction displays the front side image on a display surface of the first display panel. The light in the second direction passes through the transparent section of the pixel overlap area and displays the back side image on a display surface of the second display panel.