Backlight Module Multi-Curve Micro-Structure Film Brightness
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Solution Overview
Problem
Existing in-car display devices face challenges in meeting industrial specifications for visual angles and brightness without increasing power output, as they require enhanced brightness while adhering to specific visual angle zones and brightness levels.
Innovation Solution
A backlight module comprising a reflective plate, light guide plate, turning film with grooves, optical film, and a micro-structure film with a multi-curve structure, which enhances light focusing and collimation, and improves screen brightness in specification zones without increasing power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If power output is increased to improve screen brightness, then brightness in specification zones is improved, but power consumption increases
Solution Approach 1:
The patent changes the optical parameters of the light guide plate by introducing turning films with grooves and micro-structure films with multi-curve structures. These structural modifications alter the light propagation paths and improve light utilization efficiency, achieving higher brightness in specification zones without increasing power output
Solution Approach 2:
The micro-structure film employs multi-curve structures instead of flat surfaces to control light propagation. The curved micro-structures redirect light more effectively toward the specification zones, improving brightness distribution without requiring additional power
2Illumination intensity
If conventional light guide plate structure is used, then device complexity is low, but brightness in specification zones is insufficient
Solution Approach 1:
The light guide plate structure is segmented into multiple functional layers: the base light guide plate, turning films with grooves, and micro-structure films with multi-curve structures. Each layer performs a specific optical function, collectively achieving improved brightness in specification zones
Solution Approach 2:
Turning films and micro-structure films are introduced as intermediary elements between the light source and the display screen. These intermediaries control and redirect light propagation, ensuring concentrated light distribution in the required specification zones
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 a more focused light pattern and increased screen brightness in Zone A+, Zone A, and Zone B, meeting industrial specifications while maintaining the original power output, with a 10% gain in brightness compared to conventional designs.
Implementation Method 1
a reflective plate
Implementation Method 2
a light guide plate disposed on the reflective plate
Implementation Method 3
a turning film disposed on the light guide plate, wherein the turning film comprises a plurality of grooves on a surface thereof facing to the light guide plate
Implementation Method 4
an optical film disposed on the turning film
Implementation Method 5
a micro-structure film disposed on the optical film, wherein the micro-structure film comprises a first layer and a second layer, and an interface between the first layer and the second layer is formed of a multi-curve structure
Data Source
AI summary
A backlight module and a display device are disclosed. The display device includes: a reflective plate; a light guide plate disposed on the reflective plate; a turning film disposed on the light guide plate, wherein the turning film comprises a plurality of grooves on a surface thereof facing to the light guide plate; an optical film disposed on the turning film; a display panel disposed on the optical film; and a micro-structure film disposed on the optical film, wherein the display panel and the micro-structure film are arranged in a stack, the micro-structure film includes a first layer and a second layer, and an interface between the first layer and the second layer is formed of a multi-curve structure.