Backlight LED Segmentation for Blue Light Reduction
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Solution Overview
Problem
The reduction of blue light spectral intensity in liquid crystal displays often adversely affects luminance and chrominance of the displayed picture.
Innovation Solution
A display system comprising a backlight module with first and second light emitting diodes, where the spectral intensity of blue light from the first diode is less than that of red and green light, and a drive module with separate units to control the emission of these diodes, allowing for adjustable blue light reduction while maintaining luminance and chrominance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the spectral intensity of blue light is decreased in a liquid crystal display, then the harmful blue light exposure is reduced, but the luminance and chrominance of the displayed picture are adversely affected
Solution Approach 1:
The backlight module is segmented into multiple independent light emitting diodes (first LED, second LED, third LED) that can be controlled separately. Each LED emits different spectral characteristics, allowing independent control of blue light intensity while maintaining overall luminance through coordinated operation of all LEDs.
Solution Approach 2:
The drive module dynamically adjusts the drive currents (If1, If2, If3) supplied to each light emitting diode based on control signals. By changing these electrical parameters, the system can reduce blue light spectral intensity while compensating for luminance loss by adjusting the intensity of other color LEDs.
2Object-affected harmful factors
If the spectral intensity of blue light is reduced, then eye protection is improved, but the color reproduction accuracy deteriorates
Solution Approach 1:
The control module receives control signals that enable dynamic adjustment of the drive currents to each LED. This feedback mechanism allows real-time optimization of color output by compensating for reduced blue light through increased intensity of red and green LEDs, maintaining color accuracy despite blue light reduction.
Solution Approach 2:
The backlight module uses multiple types of light emitting diodes (first, second, third LEDs with different spectral characteristics) that can serve multiple functions. By selectively controlling which LEDs are active and at what intensity, the system can simultaneously achieve blue light reduction and maintain color reproduction accuracy.
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
Enables the decrease of blue light spectral intensity according to user requirements without compromising the luminance and chrominance of the displayed picture, ensuring normal color reproduction.
Implementation Method 1
a backlight module for supplying backlight to the display panel; wherein the backlight module comprises first light emitting diodes and second light emitting diodes
Data Source
AI summary
The embodiments of the present invention disclose a display system comprising: a display panel; a backlight module for supplying backlight to the display panel; a drive module for driving the backlight module to emit light; and a control module for controlling the drive module to drive the backlight module to emit light, wherein the backlight module comprises first light emitting diodes and second light emitting diodes, and a spectral intensity of blue light of light emitted by the first light emitting diode is less than a spectral intensity of each of red light and green light of the light emitted by the first light emitting diode; wherein the drive module comprises a first drive unit for driving the first light emitting diodes to emit light under the control of the control module, and a second drive unit for driving the second light emitting diodes to emit light under the control of the control module.