LED Display Panel Micro Lens Array Projection Brightness
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Solution Overview
Problem
Conventional projection systems using passive imager devices like LCDs and DMDs are inefficient due to light loss and require complex optics, resulting in low brightness and high power consumption, while existing LED displays do not utilize LED panels as self-emissive imager devices for projection.
Innovation Solution
A monolithically integrated LED display panel with a substrate, pixel driver circuits, and micro lenses is used as a self-emissive imager device, combining light source, image formation, and collimation functions, reducing light divergence and increasing brightness and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional passive imager devices (LCD, DMD) are used for projection, then image formation is achieved, but light loss occurs and efficiency is reduced
Solution Approach 1:
The patent employs self-emissive LED display panels where each pixel is an active light source that emits its own light. This eliminates the need for external illumination and light modulation, thereby eliminating light loss associated with passive imaging devices. The self-emissive nature ensures that all light generated contributes directly to the projection image, achieving near-100% light utilization efficiency.
Solution Approach 2:
The patent merges the light source and image formation functions into a single integrated LED display panel. By combining these functions, the system eliminates the separate illumination path required by passive devices, reducing optical complexity and minimizing light loss through multiple optical components.
2Device complexity
If conventional passive imager devices are used, then projection is achieved, but complex illumination optics are required
Solution Approach 1:
The patent merges the light source and image formation functions into a single integrated LED display panel. By combining these functions, the system eliminates the separate illumination path required by passive devices, reducing optical complexity and minimizing light loss through multiple optical components.
Solution Approach 2:
The patent extracts and eliminates the complex illumination optics subsystem from the projection system. By using self-emissive LEDs, the system removes the need for illumination lenses, mirrors, and other optical components that would otherwise be required to deliver light to passive imaging devices.
3Weight of stationary object
If conventional LCD projection systems are used, then image projection is achieved, but the system becomes bulky
Solution Approach 1:
The patent merges the light source and image formation functions into a single integrated LED display panel. By combining these functions, the system eliminates the separate illumination path required by passive devices, reducing optical complexity and minimizing light loss through multiple optical components.
Solution Approach 2:
The patent extracts and eliminates the complex illumination optics subsystem from the projection system. By using self-emissive LEDs, the system removes the need for illumination lenses, mirrors, and other optical components that would otherwise be required to deliver light to passive imaging devices.
4Use of energy by moving object
If conventional LCD projection systems are used, then projection is achieved, but power consumption is high
Solution Approach 1:
The patent employs self-emissive LED display panels where each pixel is an active light source that emits its own light. This eliminates the need for external illumination and light modulation, thereby eliminating light loss associated with passive imaging devices. The self-emissive nature ensures that all light generated contributes directly to the projection image, achieving near-100% light utilization efficiency.
Solution Approach 2:
The patent replaces the mechanical/optical light modulation system of conventional projectors with an electronically controlled LED emission system. This substitution eliminates the need for physical light paths, mirrors, and lenses, reducing energy loss and improving overall system efficiency.
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 LED display panel enhances the brightness and reduces power consumption of the projection system by effectively collecting and projecting light, overcoming the inefficiencies of conventional systems.
Implementation Method 1
an LED array including a plurality of LED dies each being coupled to one of the pixel driver circuits
Implementation Method 2
a micro lens array arranged over the LED panel. The micro lens array includes a plurality of micro lenses each corresponding to and being arranged over at least one of the LED dies
Implementation Method 3
a projection lens arranged in front of LED display panel and configured to collect and project light emitted by the LED display panel
Data Source
AI summary
A light-emitting diode (LED) projector includes an LED display panel and a projection lens arranged in front of LED display panel and configured to collect and project light emitted by the LED display panel. The LED display panel includes an LED panel and a micro lens array arranged over the LED panel. The LED panel includes a substrate, a driver circuit array on the substrate and including a plurality of pixel driver circuits arranged in an array, and an LED array including a plurality of LED dies each being coupled to one of the pixel driver circuits. The micro lens array includes a plurality of micro lenses each corresponding to and being arranged over at least one of the LED dies.