PWM Sequence Control for Display Brightness and Color Temperature
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Solution Overview
Problem
Existing display systems face challenges in efficiently controlling color temperature, brightness, and image quality through pulse-width modulation (PWM) sequences, particularly in managing bit-planes, dithering, and duty cycles to optimize image presentation across various content types and lighting conditions.
Innovation Solution
A PWM sequencer is employed to generate PWM sequences dynamically, dividing them into color and bit segments, with an execution engine processing these segments to control light modulators, allowing for on-the-fly adjustments based on factors like frame rate, duty cycle, and image quality specifications, and enabling mode switching during runtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PWM sequences are used to control color temperature and brightness, then image quality and power management are improved, but system complexity increases due to dynamic sequence generation and execution
Solution Approach 1:
The PWM sequence is divided into multiple color segments (red, green, blue) with different time durations, allowing independent control of color temperature and brightness. Each color segment can be dynamically adjusted without affecting others, enabling flexible adaptation to different display modes while managing complexity through modular sequence structure
Solution Approach 2:
The system dynamically generates and executes PWM sequences based on runtime conditions such as display mode, frame rate, and brightness requirements. The execution engine processes sequence segments in real-time, allowing the system to adapt PWM parameters dynamically rather than using fixed sequences, thereby improving versatility without permanent complexity increase
2Adaptability or versatility
If dynamic PWM sequence generation is implemented, then adaptability to different display modes is improved, but processing time and execution complexity increase
Solution Approach 1:
The system pre-calculates and stores optimal PWM sequence parameters for different display modes and brightness levels. When a mode change is requested, the execution engine retrieves and executes the pre-prepared sequence segments rather than calculating them in real-time, significantly reducing processing time while maintaining full adaptability
Solution Approach 2:
The system adjusts PWM sequence parameters (color segment durations, duty cycles) based on predefined mode specifications. By changing parameters according to stored mode profiles rather than regenerating entire sequences, the system achieves rapid adaptation to different display modes with minimal processing overhead
Data Source
AI summary
Systems, methods, and apparatus for pulse-width modulation sequence. In some examples, a controller configured to produce a sequence segment having a first time duration by stretching a building block sequence having a second time duration by a stretch factor and instruct a light modulator to set pixel elements based on the sequence segment, wherein the light modulator comprises the pixel elements.