Backlight Brightness Control for Medical Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Medical displays face challenges in maintaining consistent and integral display quality over time and across different locations, with conventional backlight modules experiencing instability in brightness due to factors like boot time, long-term use, and ambient temperature changes, leading to reduced reliability and service life.
Innovation Solution
A backlight brightness control method and device that acquires the luminous brightness value of a display panel, determines a relationship with a preset brightness value, and adjusts the current to the backlight driver module to stabilize brightness, using a brightness sensor and control circuit to ensure consistent emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the backlight module operates at high brightness continuously, then the display quality is maintained, but the service life of the backlight module is reduced
Solution Approach 1:
The patent applies dynamics by making the backlight brightness adjustable rather than fixed. The control circuit dynamically adjusts the backlight brightness based on detected image content, switching between high brightness for bright images and low brightness for dark images, thereby extending service life while maintaining display quality when needed
Solution Approach 2:
The patent changes the brightness parameter of the backlight module based on the luminance characteristics of the displayed image. By detecting whether the image is bright or dark and adjusting the backlight brightness accordingly, the system optimizes both display quality and energy consumption/service life
2Loss of energy
If the backlight brightness is reduced to save energy, then the service life is extended, but the display quality consistency deteriorates
Solution Approach 1:
The patent implements feedback by using a detection circuit to sense the luminance characteristics of the displayed image and feeding this information back to the control circuit. The control circuit then adjusts the backlight brightness accordingly, ensuring display quality consistency while optimizing energy consumption
Solution Approach 2:
The system dynamically adjusts backlight brightness based on real-time detection of image luminance characteristics, rather than maintaining a fixed brightness level. This dynamic adjustment ensures consistent display quality across different image types while reducing energy consumption
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 achieves stable control of backlight brightness, ensuring consistent image quality across medical displays, reducing the risk of premature wear and maintaining sufficient brightness throughout the device's life cycle while improving the reliability of luminous elements.
Implementation Method 1
acquiring a luminous brightness value of a display panel
Implementation Method 2
generating a current having the adjusted current value by the backlight driver module to drive a backlight module in the display panel to emit light
Data Source
AI summary
A backlight brightness control method and a backlight brightness control device are provided. The backlight brightness control method includes: acquiring a luminous brightness value of a display panel; determining a relationship between the luminous brightness value and a preset brightness value by a brightness control circuit; transmitting an adjusted current value to a backlight driver module according to the relationship by the brightness control circuit; and generating a current having the adjusted current value by the backlight driver module to drive a backlight module in the display panel to emit light.