Light-Emitting Panel with Photoelectric Conversion Units
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Solution Overview
Problem
In light-emitting panels, a significant portion of light is trapped within functional layers and not emitted to the surface, leading to low light utilization, which hampers the improvement of power consumption and contrast ratio.
Innovation Solution
A light-emitting panel design featuring a driving substrate with driver circuits and photoelectric conversion units, where the photoelectric conversion units convert unemitted optical signals into electrical signals and supply them to the light-emitting elements, enhancing light utilization and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If light-emitting elements emit light in conventional display panels, then light emission function is achieved, but a significant portion of light is trapped within functional layers and cannot be emitted to the light emission surface, resulting in low light utilization
Solution Approach 1:
The patent converts the previously wasted trapped light into a useful resource by introducing photoelectric conversion units that capture the light confined within functional layers and convert it back into electrical signals, which are then fed back to light-emitting elements to generate additional light output, thereby transforming energy loss into beneficial light emission
Solution Approach 2:
The patent implements a feedback mechanism where photoelectric conversion units detect light that would otherwise be lost, convert it to electrical signals, and return these signals to the light-emitting elements. This closed-loop feedback system continuously recycles light energy that would normally be wasted, improving overall light utilization efficiency
Solution Approach 3:
Instead of allowing light to be discarded when trapped in functional layers, the patent recovers this light energy through photoelectric conversion units positioned to capture the confined light, converting it back to electrical energy that can be reused to generate additional light emission at the display surface
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 improves light utilization, increases display brightness, and enhances the contrast ratio of the light-emitting panel by reusing unemitted light and reducing the power required for the driver circuits.
Implementation Method 1
a photoelectric conversion unit, configured to convert the unemitted light into an electrical signal and supply the electrical signal to the light-emitting element
Data Source
AI summary
Provided are a light-emitting panel and a display device. The light-emitting panel includes a driving substrate and a plurality of light-emitting elements. The driving substrate includes a base substrate, a plurality of driver circuits, and a plurality of photoelectric conversion units. The driver circuits and the photoelectric conversion units are located on the base substrate. A photoelectric conversion unit includes a first doped region and a second doped region. The light-emitting elements are located on a side of the driving substrate. The orthographic projection of a light-emitting element among at least part of the light-emitting elements on the driving substrate is a first projection. An orthographic projection of the photoelectric conversion unit on the driving substrate is located between two adjacent first projections. A driver circuit and the photoelectric conversion unit are each electrically connected to the light-emitting element.