Optimal dimension of edge-lit light guide plate based on light conduction analysis

Area of Science:

• Optics
• Materials Science
• Display Technology

Background:

• Edge-lit light guide plates (LGPs) are crucial components in display backlights.
• LGP dimensions significantly influence output performance, but this relationship lacks systematic research.
• Optimizing LGP dimensions is key to balancing backlight efficiency and uniformity.

Purpose of the Study:

• To systematically investigate and numerically establish the relationship between LGP dimensions and light output performance.
• To develop a method for optimizing LGP dimensions for enhanced display applications.
• To provide a systematic design approach for balancing backlight efficiency and uniformity.

Main Methods:

• Designing a micro-structural dot array based on calculated illuminance distribution.
• Defining key parameters: dot density, scattering coefficient, and collision loss coefficient.
• Utilizing ray-tracing simulations to determine parameters and establishing a correlation function for optimal LGP dimensions.

Main Results:

• A numerical function was established linking LGP dimensions to light output performance.
• Optimal LGP dimensions were determined using a correlation function with light energy output.
• The approach was validated through both simulation and experimental results.

Conclusions:

• The study provides a systematic method for optimizing LGP dimensions for improved display performance.
• Combining dot design and dimensional optimization effectively balances backlight efficiency and uniformity.
• The findings hold significant theoretical guiding value for practical display applications.