Illumination Apparatus Dynamic Power Limiting for Brightness Adaptability
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Solution Overview
Problem
Existing illumination apparatuses with initial illuminance correction and light control functions cannot provide brightness corresponding to power larger than the maximum supply power limited by the initial illuminance correction function without additional switching operations, impairing user convenience.
Innovation Solution
The apparatus includes a light controller that adjusts supply power to the lamp based on an externally input light control signal, allowing for power adjustments above the maximum supply power within a range from rated power to minimum power, enabling operation without additional user switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the maximum supply power is limited by the initial illuminance correction function to save electricity, then power consumption is reduced, but the ability to provide higher brightness when needed is impaired
Solution Approach 1:
The system dynamically adjusts the maximum supply power limit based on the accumulated on-time of the lamp. When the lamp is new (low accumulated on-time), the maximum supply power is limited to prevent excessive brightness. As the lamp ages (higher accumulated on-time), the maximum supply power limit is gradually increased, allowing full brightness when needed. This dynamic adjustment resolves the contradiction between power saving and brightness adaptability.
Solution Approach 2:
The system changes the parameter of maximum supply power limit as a function of the lamp's accumulated on-time. The light controller modifies the interpretation of light control signals based on the lamp's usage history, allowing the same signal to produce different power output levels depending on how long the lamp has been in use. This parameter change enables the system to adapt between power-saving mode and full-brightness mode without additional user operations.
2Adaptability or versatility
If additional switching means are added to provide brightness above the maximum supply power limit, then brightness versatility is improved, but device complexity and user operation difficulty increase
Solution Approach 1:
The existing light controller is made multi-functional by enabling it to interpret light control signals in two different modes depending on the lamp's accumulated on-time. The same controller hardware performs both the initial illuminance correction function (power-saving mode) and the full brightness control function (versatility mode) without requiring additional switching hardware. This universality resolves the contradiction between brightness versatility and device complexity.
3Power
If additional switching operations are required to access higher brightness modes, then power control precision is improved, but ease of operation deteriorates
Solution Approach 1:
The system automatically determines whether to apply the power-saving limit or full brightness based on the lamp's accumulated on-time without requiring user intervention. The light controller self-adjusts its behavior according to the lamp's usage history, selecting the appropriate power output mode automatically. This self-service mechanism resolves the contradiction between power control precision and ease of operation by eliminating the need for manual switching while maintaining precise power management.
Data Source
AI summary
An illumination apparatus, which controls a supply power supplied to a lamp according to an accumulated interval of on-time and a light control signal, is configured in which a maximum supply power supplied to the lamp according to the accumulated interval of on-time is supplied to the lamp when the supply power to the lamp corresponding to the light control signal is above the maximum supply power to the lamp according to the accumulated interval of on-time at a point when the illumination apparatus is turned on or the lamp starts lighting. When the light control signal is operated so as to exceed a level of the maximum supply power to the lamp according to the accumulated interval of on-time or the light control signal varies more than a prescribed level, the supply power is shifted to an adjustable condition so as to be higher than the maximum supply power to the lamp according to the accumulated interval of on-time.