Backlight Module Fill-Light Structure for Brightness Uniformity
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Solution Overview
Problem
Large-size lamp panels in backlight modules are prone to warpage, unevenness, fracture, and light truncation, leading to dark lines at joints, affecting brightness uniformity and potentially causing lamp damage or circuit conduction issues due to expansion and contraction.
Innovation Solution
The backlight module features a lamp panel with integrated backlight and fill-light regions, where light-emitting elements are arranged in an array, and a fill-light structure adjusts tone parameters to match the backlight regions, ensuring consistent brightness and preventing damage from expansion and contraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple lamp panels are spliced to form a large-size backlight source, then the backlight module can achieve large display area, but edges of the lamp panels are prone to warpage, unevenness, fracture, light truncation, and cutting of black edges, resulting in dark lines on joints and affecting brightness uniformity
Solution Approach 1:
The backlight module is divided into multiple independent lamp panels that are spliced together to form a large-size backlight source. Each lamp panel is treated as an independent unit with its own light-emitting elements arranged in arrays, allowing the large area to be achieved while managing the complexity of individual panel fabrication and assembly.
Solution Approach 2:
A reflective plate is introduced as an intermediary component between the light-emitting elements and the display panel. The reflective plate reflects light from the light-emitting elements toward the display panel, helping to distribute light more uniformly across the display area and mitigating the dark line effects at panel joints.
2Area of stationary object
If multiple lamp panels are spliced to form a large-size backlight source, then the backlight module can achieve large display area, but edges of the lamp panels are prone to warpage, unevenness, fracture, light truncation, and cutting of black edges, resulting in dark lines on joints
Solution Approach 1:
The backlight module is divided into multiple independent lamp panels that are spliced together to form a large-size backlight source. Each lamp panel is treated as an independent unit with its own light-emitting elements arranged in arrays, allowing the large area to be achieved while managing the complexity of individual panel fabrication and assembly.
Solution Approach 2:
The design anticipates potential structural issues by carefully designing the splicing structure and support framework for large-size lamp panels. The reflective plate and housing structure provide structural support that prevents warpage and fracture before they occur during operation.
3Area of stationary object
If lamp panels of large size are used, then the backlight module can achieve large display area, but expansion and contraction may lead to lamp damage or abnormal circuit conduction
Solution Approach 1:
The backlight module is divided into multiple independent lamp panels that are spliced together to form a large-size backlight source. Each lamp panel is treated as an independent unit with its own light-emitting elements arranged in arrays, allowing the large area to be achieved while managing the complexity of individual panel fabrication and assembly.
Solution Approach 2:
The design likely incorporates flexible mounting structures or expansion joints that allow the large-size lamp panels to expand and contract without causing damage to the light-emitting elements or circuit connections. The housing and support structures are designed to accommodate thermal expansion while maintaining electrical connectivity.
4Illumination intensity
If light-emitting elements are arranged densely to improve brightness, then the backlight intensity increases, but the distance between adjacent light-emitting elements becomes smaller, making them more susceptible to expansion and contraction damage
Solution Approach 1:
The light-emitting elements are arranged in arrays with carefully controlled spacing. The distance between adjacent light-emitting elements is optimized to balance brightness requirements with structural reliability, ensuring that elements are close enough to provide sufficient illumination but far enough apart to withstand thermal expansion and contraction without damage.
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 enhances the uniformity and quality of the backlight module's brightness, preventing dark lines and damage from expansion, while maintaining consistent tone and brightness across the display panel.
Implementation Method 1
The fill-light structure is configured to adjust a tone parameter of the fill-light region to be within a tone-parameter range of the multiple backlight regions
Data Source
AI summary
A backlight module and a display apparatus are provided. The backlight module includes a lamp panel, multiple light-emitting elements, an encapsulation layer, and a fill-light structure. The lamp panel has multiple backlight regions and multiple fill-light regions each arranged between two adjacent backlight regions. The lamp panel has an integral structure. The multiple light-emitting elements are arranged in an array on each of the multiple backlight regions. A distance between two adjacent light-emitting elements disposed on both sides of the fill-light region is greater than a distance between two adjacent light-emitting elements disposed on a same side of the fill-light region. The encapsulation layer is disposed on the lamp panel and covers the multiple light-emitting elements. The fill-light structure is configured to adjust a tone parameter of the fill-light region to be within a tone-parameter range of the multiple backlight regions.