PMOLED Backlight Source for Transparent Displays
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Solution Overview
Problem
Transparent display devices face challenges with high power consumption and low transmittance due to the use of LED lights and light guide plates in their backlight sources.
Innovation Solution
A Passive Matrix Organic Light Emitting Diode (PMOLED) display device is used as a backlight source, featuring a transparent substrate, wiring layer, anode, and cathode layers, with light emitting units arranged in an array, allowing for lower power consumption and higher transmittance without the need for a light guide plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED lights are used in the backlight source, then the illumination intensity is improved, but the power consumption increases
Solution Approach 1:
The patent extracts and removes the light guide plate from the backlight source structure, eliminating the need for high-power LED lights. By directly placing light-emitting components on the display panel, the system achieves sufficient illumination with lower power consumption, resolving the contradiction between illumination intensity and power consumption.
Solution Approach 2:
The patent replaces the traditional LED-based mechanical lighting system with an integrated light-emitting display structure. This substitution eliminates the need for separate high-power illumination components and light guide plates, achieving both adequate illumination and reduced power consumption through a unified low-power design.
2Illumination intensity
If light guide plates are used in the backlight source, then the illumination distribution is improved, but the transmittance decreases
Solution Approach 1:
The patent removes the light guide plate from the backlight structure, eliminating the component that blocks light transmission. By using direct light-emitting components mounted on the display panel, the system achieves uniform illumination distribution without compromising the transmittance of the overall structure, as there is no opaque light guide plate in the optical path.
Solution Approach 2:
The patent transitions from a separate backlight unit with light guide plates to an integrated structure where light-emitting components are positioned in a different spatial dimension - directly on the display panel surface. This dimensional change eliminates the need for light guide plates in the traditional backlight position, thereby maintaining high transmittance while achieving proper illumination distribution.
3Illumination intensity
If LED lights and light guide plates are used, then the illumination coverage is improved, but the device complexity increases
Solution Approach 1:
The patent merges the backlight function directly into the display panel structure by integrating light-emitting components with the pixel structure. This combination eliminates the need for separate LED lights and light guide plates, reducing device complexity while maintaining comprehensive illumination coverage across the display area.
Solution Approach 2:
The patent makes the display panel structure multi-functional by enabling it to serve both as the display medium and as the illumination source. The same structure that displays images also provides backlighting, eliminating the need for dedicated backlight components and thereby reducing overall device complexity while ensuring full illumination coverage.
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 PMOLED display device reduces power consumption and enhances transmittance by using transparent materials and eliminating the need for a light guide plate, providing a more efficient and transparent backlight solution for display devices.
Implementation Method 1
the light emitting layer includes a plurality of light emitting units for emitting white light
Implementation Method 2
the anode layer includes a plurality of anodes... configured to reflect light emitted from the light emitting units
Data Source
AI summary
The present disclosure relates to a backlight source, a display device, and a driving method thereof, in the field of field of displays. The backlight source includes a Passive Matrix Organic Light Emitting Diode (PMOLED) display device, wherein the PMOLED display device includes a transparent substrate. A transparent wiring layer, an anode layer, a light emitting layer, a transparent cathode layer, and a transparent pixel definition layer are arranged on the transparent substrate subsequently. The light emitting layer includes a plurality of light emitting units for emitting white light, and the plurality of light emitting units are arranged in an array. The anode layer includes a plurality of anodes, the plurality of anodes are arranged below the corresponding plurality of light emitting units respectively, and can reflect light emitted from the corresponding light emitting units. The backlight source in the present application is implemented with PMOLED display device. The substrate, wiring layer, cathode layer and pixel definition layer of the PMOLED display device can use transparent materials, resulting in high transmittance of the backlight sources in the areas excluding the anodes, such that the transparent display device can have high transmittance.