Light Emitting Element Control Circuit for Dynamic Current Mode Switching
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Solution Overview
Problem
Light emitting elements in electronic devices, such as LEDs and organic EL elements, require advanced control to enhance visual effects and conserve energy, particularly in standby mode, by adjusting light emission patterns, but existing technologies lack efficient methods for varying current supply to achieve these goals.
Innovation Solution
A light emitting element control circuit comprising a variable current generation circuit, a fixed current generation circuit, and a mode setting circuit that allows for three modes: prohibiting current supply, supplying variable current, and supplying fixed current, enabling fade-in and fade-out functions to adjust luminance gradually and conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If variable current is supplied to the light emitting element, then visual effects and luminance adjustment are enhanced, but power consumption increases
Solution Approach 1:
The patent implements dynamic current control by switching between variable current mode (for luminance adjustment and visual effects) and fixed current mode (for stable operation). The mode setting circuit dynamically selects between different current generation circuits based on operational requirements, allowing the system to adapt power consumption to actual needs rather than continuously supplying variable current.
Solution Approach 2:
The patent changes the current parameter from variable to fixed based on operational mode. By using the mode setting circuit to select between variable current generation and fixed current generation, the system can adjust the current characteristic (variable vs. fixed) to match the required function, thereby reducing power consumption when full variable control is not needed.
2Use of energy by moving object
If fixed current smaller than predetermined current is supplied, then energy conservation is achieved, but visual effects and presentation effects are reduced
Solution Approach 1:
The patent segments the current supply function into two distinct modes: variable current mode for visual effects and fixed current mode for energy conservation. The mode setting circuit divides the operational states, allowing the system to selectively activate only the necessary function at any given time, thus achieving energy savings without permanently sacrificing visual effects capability.
Solution Approach 2:
The patent employs periodic switching between different current supply modes based on operational requirements. The mode setting circuit enables the system to alternate between variable current (for visual effects during active use) and fixed current (for energy conservation during standby or low-activity periods), creating a rhythmic pattern of high and low power states.
3Adaptability or versatility
If multiple current supply modes are implemented, then functionality and adaptability are enhanced, but device complexity increases
Solution Approach 1:
The patent achieves multi-functionality through a single mode setting circuit that controls access to two current generation circuits (variable and fixed). This universal control mechanism allows one circuit component to perform multiple functions by selecting between different current generation paths, thereby enhancing adaptability without proportionally increasing overall circuit complexity.
Solution Approach 2:
The mode setting circuit acts as an intermediary between the control system and the two current generation circuits. It mediates the selection process, translating high-level operational requirements into specific current supply modes. This intermediary layer simplifies the control architecture by providing a single point of decision-making rather than requiring complex direct control of multiple circuits.
Data Source
AI summary
A light emitting element control circuit comprising: a variable current generation circuit configured to generate a variable current varying in a direction of increase or in a direction of decrease; a fixed current generation circuit configured to generate a fixed current smaller than a predetermined current of a light emitting element; and a mode setting circuit configured to selectively set a first mode of prohibiting supply of the variable current and the fixed current to the light emitting element, a second mode of supplying the variable current to the light emitting element, and a third mode of supplying the fixed current to the light emitting element, for the variable current generation circuit and the fixed current generation circuit.