Brightness Correction Device Delay Mechanism
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Solution Overview
Problem
Conventional brightness correction devices in portable terminals, such as car televisions, are overly sensitive to changes in ambient light, leading to frequent and discomforting brightness adjustments, especially when passing through areas with significant light variations, like tree-lined streets.
Innovation Solution
A brightness correction device equipped with an illumination sensor, memory, and controller that measures ambient light, calculates a delay time for brightness adjustments, and adjusts the display unit's brightness based on a target setting value, reducing unnecessary changes and enhancing user comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the brightness correction device frequently adjusts brightness in response to ambient light changes, then the display adapts to varying light conditions, but the user experiences discomfort and the device consumes excessive power
Solution Approach 1:
The patent applies preliminary action by introducing a delay time mechanism before brightness correction occurs. The illumination controller waits for a predetermined delay period after detecting ambient light changes before executing brightness adjustment. This preliminary waiting period filters out transient light variations (like passing through tree-lined streets) that would otherwise cause unnecessary brightness changes and user discomfort
Solution Approach 2:
The patent implements dynamics by making the brightness correction system adaptive and time-dependent. The illumination controller dynamically determines whether to correct brightness based on the elapsed time since the last correction and compares current illuminance with stored reference values. This dynamic approach allows the system to respond to genuine light changes while ignoring transient variations
2Measurement precision
If the brightness correction device responds sensitively to ambient light changes, then the display brightness matches the environment, but unnecessary brightness changes occur in areas with significant light variations
Solution Approach 1:
The system performs preliminary detection and storage of reference illuminance values before making brightness corrections. By storing reference values and comparing current measurements against these references after a delay period, the system maintains high detection sensitivity while filtering out transient variations that would destabilize brightness
Solution Approach 2:
The patent implements feedback by continuously monitoring ambient illuminance, comparing current values with stored reference values, and using this comparison to determine whether brightness correction is necessary. The illumination controller feeds back the delay time information and illuminance comparison results to maintain stable brightness while responding to genuine environmental changes
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
The solution effectively corrects display brightness in response to ambient light changes, minimizing discomfort and power consumption while ensuring easy viewing conditions.
Implementation Method 1
an illumination sensor that measures an illuminance value that is ambient environment information
Data Source
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Figure 3A~3B
AI summary
A brightness correction device includes a display unit, an illumination sensor for measuring an illuminance value that is ambient environment information, a memory for storing a current brightness setting value and calculation information for calculating a delay time, an illumination controller, and a brightness controller. The illumination controller determines a target brightness setting value from the illuminance value measured by the illumination sensor, determines a brightness correction start time in response to the target brightness setting value and the current brightness setting value and the calculation information that are stored in the memory, calculates an amount of brightness setting change per specified time from the current brightness setting value stored in the memory and the target brightness setting value at the brightness correction start time, and outputs an output brightness setting value in response to the amount of brightness setting change that is calculated. The brightness controller adjusts brightness of the display unit in response to the output brightness setting value output from the illumination controller.