Secondary Driver Extends Light Module Emission Duration
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Solution Overview
Problem
Existing electronic devices for emitting lights of different colors, such as in projectors, face limitations in light density due to sequential turn-on and turn-off of light modules, which affects image quality, especially in bright environments.
Innovation Solution
The introduction of a secondary driver that allows simultaneous or extended emission of light by one light module during the duration when another is turned on by the primary driver, increasing overall light density without compromising color perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single primary driver controls multiple light modules sequentially, then circuit area is saved and control is simplified, but light density is limited due to sequential operation
Solution Approach 1:
The control function is segmented into two independent drivers: a primary driver that controls the switching sequence of multiple light modules, and secondary drivers that extend the emission duration of individual light modules. This segmentation allows simultaneous control of multiple light modules while extending their emission time, thereby increasing light density without requiring a completely complex new control system.
Solution Approach 2:
The secondary driver extends the emission duration of a light module beyond the primary driver's control pulse. By maintaining the light module's emission after the primary driver switches it off, the system achieves extended light density while the primary driver continues to control the sequential switching of different modules.
2Illumination intensity
If lights of different colors are turned on and off sequentially, then color control is achieved, but light density decreases due to limited turn-on durations
Solution Approach 1:
The secondary driver extends the emission duration of each light module beyond the primary driver's control pulse width. This preliminary extension ensures that each light module emits light for a longer period, increasing the overall light density while maintaining the sequential color control scheme.
Solution Approach 2:
The secondary driver maintains the light emission continuously after the primary driver's pulse ends, ensuring that the useful light output continues beyond the original turn-on duration. This continuity increases the effective light density without disrupting the sequential color control.
3Adaptability or versatility
If ambient light is present in bright environments, then display versatility is improved, but image quality deteriorates unless light density is increased
Solution Approach 1:
The secondary driver extends the light emission duration to increase overall light density, ensuring that the projected image maintains sufficient brightness against ambient light in bright environments. This extension compensates for the competing ambient illumination without requiring changes to the display content or timing.
Data Source
AI summary
An electronic device includes a first light module, a second light module, a primary driver, and a first secondary driver. The first light module is used to emit a first light, and the second light module is used to emit a second light. The primary driver has a first control terminal for turning on the first light module during a first duration, and a second control terminal for turning on the second light module during a second duration. The first secondary driver is used to turn on the first light module during the second duration.