Laser Projection Brightness Control Using Frame-Based Current Driving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current laser projection apparatuses are limited by fixed brightness of the laser source, resulting in poor display effects.
Innovation Solution
A laser projection apparatus with a display control circuit that generates variable current control signals for each frame of image, allowing the laser source driving circuit to adjust brightness dynamically by controlling the laser source to emit light according to these signals, thereby supporting variable brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the laser source operates at fixed brightness, then the structure is simple, but the display effect is poor
Solution Approach 1:
The patent implements dynamic brightness control by introducing a display control circuit that generates variable current control signals for each frame of image. The laser source driving circuit adjusts the laser source brightness dynamically based on these signals, transforming the fixed brightness system into a variable brightness system that adapts to different display requirements.
Solution Approach 2:
The patent changes the operating parameter of the laser source from fixed current to variable current. The display control circuit generates current control signals with different magnitudes corresponding to different frames of images, allowing the laser source brightness to be adjusted by changing the current parameter dynamically.
2Ease of operation
If variable brightness control is implemented, then display effect improves, but control circuit complexity increases
Solution Approach 1:
The control system is segmented into distinct functional modules: a display control circuit for generating control signals, a laser source driving circuit for signal processing and amplification, and the laser source itself. This segmentation allows each module to perform its specific function efficiently while maintaining overall system manageability despite the increased complexity.
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 enables dynamic dimming, improving the display effect of the laser projection apparatus by allowing for variable brightness, enhancing image quality.
Implementation Method 1
The laser source is a blue laser for emitting blue laser light
Data Source
AI summary
A laser projection apparatus includes a display control circuit, a laser source, and a laser source driving circuit. The algorithm processor is configured to: generate N current control signals corresponding to each of a plurality of frames of images, and select an effective current control signal from the N current control signals, wherein the N current control signals include current control signals that are in one-to-one correspondence with M primary colors of each frame of image, wherein N is an integer greater than 2, and M is a positive integer. The laser source driving circuit is connected to the display control circuit and the laser source. The laser source driving circuit includes a voltage output circuit, a driving chip, and a peripheral circuit connected to the voltage output circuit and the driving chip.