Area Light Source Regional Brightness Control
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Solution Overview
Problem
Conventional display devices with point light sources encapsulated LEDs face issues of complex structure, high heat generation, excessive power consumption, and inability to control brightness at specific regions when converting line light sources to area light sources.
Innovation Solution
An area light source design featuring a lamination structure with a first and second conductive structure arranged oppositely, a light-emitting layer with insulated light-emitting chips, and a reflection layer, allowing for independent control of light-emitting chips and regions, reducing complexity and power consumption while enabling adjustable brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If point light sources (LEDs) are encapsulated to form light bars and arranged in a concentrated manner, then a line light source is provided, but excessive heat is generated locally and high current is produced
Solution Approach 1:
The patent segments the light-emitting elements into multiple independent light-emitting chips arranged in an array on the light guide plate, rather than using concentrated LED light bars. This segmentation distributes the heat generation across multiple smaller elements, reducing local heat concentration and allowing for better thermal management.
Solution Approach 2:
The patent implements regional brightness control by dividing the light guide plate into multiple control regions, each with independently controllable light-emitting chips. This allows different regions to have different brightness levels, enabling localized adjustment of power consumption and heat generation based on specific display requirements.
2Power
If LED light bars are arranged in a concentrated manner, then a line light source is formed, but the structure becomes complex and power consumption increases
Solution Approach 1:
The patent divides the backlight system into multiple independently controllable regions with individual light-emitting chips, allowing only the necessary regions to be illuminated at any given time. This segmentation enables dynamic power management, reducing overall power consumption compared to illuminating the entire light guide plate uniformly.
Solution Approach 2:
The patent implements partial illumination by activating only specific regions of the light guide plate based on display content requirements, rather than illuminating the entire area. This partial action approach reduces power consumption while maintaining adequate brightness where needed.
3Shape
If a direct-type or edge-type structure is adopted to convert line light source to area light source, then an area light source is achieved, but the structure becomes relatively complex
Solution Approach 1:
The patent merges the light source generation and light distribution functions into a single integrated structure. Light-emitting chips are directly mounted on the light guide plate, combining the illumination source and the light guiding/diffusing function in one component, thereby eliminating the complexity of separate edge-type structures or direct-type assemblies with multiple optical membranes.
Solution Approach 2:
The patent transitions from traditional edge-type (1D light source converted to 2D area) or direct-type structures to a 2D array of light-emitting chips directly on the light guide plate. This dimensional change allows for simpler integration and more flexible control, reducing structural complexity while achieving uniform area illumination.
4Illumination intensity
If conventional area light source structures are used, then an area light source is provided, but brightness control at specific regions is not possible
Solution Approach 1:
The patent segments the backlight system into multiple independently controllable regions, with each region containing its own light-emitting chips that can be controlled separately. This segmentation enables precise regional brightness control, allowing different parts of the display to have different illumination levels based on content requirements.
Solution Approach 2:
The patent implements dynamic brightness control by enabling real-time adjustment of illumination levels in different regions of the light guide plate. The independent control of light-emitting chip arrays allows the system to dynamically adapt brightness distribution, enhancing ease of operation for display optimization.
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
This design simplifies the conversion from point to area light sources, enhances light utilization, reduces power consumption, and allows for regional brightness control, resulting in an ultra-thin, cost-effective, and flexible display solution with improved dynamic rendering capabilities.
Implementation Method 1
the insulation material is configured to emit light under the excitation of a light beam from each light-emitting chip
Implementation Method 2
a reflection layer arranged at a side of the light-emitting layer away from the second conductive structure
Data Source
AI summary
An area light source, a method for manufacturing the same and a display device are provided. The area light source includes: a first conductive structure and a second conductive structure arranged opposite to each other; and a light-emitting layer arranged between the first conductive structure and the second conductive structure and including a plurality of light-emitting chips insulated from each other. A first electrode of each light-emitting chip is electrically connected to the first conductive structure, and a second electrode of each light-emitting chip is electrically connected to the second conductive structure.