LED Projector Drive Circuit Synchronization
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Solution Overview
Problem
Current LED projectors face challenges in achieving higher brightness and color saturation, necessitating improvements in LED light source efficiency.
Innovation Solution
Incorporating an additional blue light diode synchronized with a green light diode, utilizing a drive circuit configuration that includes red, green, first blue, and second blue light drive circuits, where the second blue light control signal is synchronized with the green light drive signal to enhance brightness without affecting color saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional LED light source configuration is used, then device simplicity is maintained, but brightness is insufficient
Solution Approach 1:
The blue light source is segmented into two separate blue light diodes (first blue light diode and second blue light diode) that operate independently with different drive circuits. This segmentation allows the system to achieve higher total brightness by combining the output of multiple blue light sources while maintaining independent control over each diode's intensity and timing, thus resolving the contradiction between increased brightness and device complexity.
2Illumination intensity
If additional blue light diode is added to increase brightness, then brightness increases, but color saturation may be affected
Solution Approach 1:
The patent employs periodic action by synchronizing the second blue light diode with the green light diode through synchronous pulses. The drive circuits control the blue and green light diodes to emit light in coordinated periodic cycles, ensuring that the combined light output maintains proper color balance and saturation while achieving higher overall brightness. This periodic synchronization prevents color distortion that would otherwise result from simply adding more blue light.
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 configuration increases projector brightness by 40% while maintaining original color saturation, effectively addressing the limitations of existing LED projector technologies.
Implementation Method 1
The LED light source has the advantages of light weight, low temperature, high brightness, high light collimation, and high reliability
Data Source
AI summary
A projector and a drive circuit thereof are provided. The projector includes a light source and a drive circuit. The light source includes at least one red light diode, at least one green light diode, at least one first blue light diode and at least one second blue light diode. The drive circuit includes a red light drive circuit, a green light drive circuit, a first blue light drive circuit and a second blue light drive circuit. The green light drive circuit outputs a green light drive signal to the green light diode according to a green light control signal. The second blue light drive circuit outputs a second blue light drive signal to the second blue light diode according to a second blue light control signal. The second blue light control signal and the green light drive signal have synchronous pulse.