Brightness enhancement film is a functional optical film used in LCD backlight to enhance the central axis brightness of the light emitted through the diffuser plate. About 40% to 70% of light passes through the brightness enhancement film and about 50% of light enhances the central axis brightness by repeating the reflection process. This film can be classified into prism film, micro-lens film and composite film.
A brightness enhancement film used in general type BLU. Its structure has prisms on substrate film.
- Brite 200
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Items Material Dimension Structure Prism Layer Acrylic Height 32㎛, Pitch 50㎛ Base Layer PET 50㎛/125㎛/188㎛/250㎛ Application Mobile, Note-PC, MNT, TV Product Line 2mil, 5mil, 7mil, 10mil (* Brite 200-2Mil : Height 15㎛,Pitch 25㎛)
Test Item Condition Result Optical Test Brightness
19” (gain)LGP + Diffuser sheet + Brite 200 + Protective sheet
(*Ref. : LGP + Diffuser sheet + BEFIII + Protective sheet)101% Reliability
TestHeat Shrinkage TD Heat Shrinkage (150℃*30min) 0.29% MD Heat Shrinkage (150℃*30min) 0.85% Constant
Temp. &
Humidity
(Lamp on)60 ℃, 75% RH for 100 hrs - △gain 2.6% 60 ℃, 75% RH for 100 hrs - △E 0.45 High Temp. 70 ℃ for 300 hrs - △gain 8.5% 70 ℃ for 300 hrs - △E 0.31 Low Temp. -30 ℃ for 100 hrs - △gain 0.5% -30 ℃ for 100 hrs - △E 0.19
- Brite 200M
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Items Material Dimension Structure Prism Layer Acrylic Height 32㎛, Pitch 50㎛ Base Layer PET 50㎛/125㎛/188㎛/250㎛ Application Note-PC, MNT, TV Product Line 5mil, 7mil, 10mil (* Brite 200-2Mil : Height 15㎛,Pitch 25㎛)
Test Item Condition Result Optical Test Brightness
19” (gain)LGP + Diffuser sheet + Brite 200 + Protective sheet
(*Ref. : LGP + Diffuser sheet + BEFIII + Protective sheet)101% Reliability
TestHeat Shrinkage TD Heat Shrinkage (150℃*30min) 0.28% MD Heat Shrinkage (150℃*30min) 0.73% Constant
Temp. &
Humidity
(Lamp on)60 ℃, 75% RH for 100 hrs - △gain 3.7% 60 ℃, 75% RH for 100 hrs - △E 1.2 High Temp. 70 ℃ for 300 hrs - △gain 3.6% 70 ℃ for 300 hrs - △E 1.6 Low Temp. -30 ℃ for 100 hrs - △gain 1.5% -30 ℃ for 100 hrs - △E 0.75
- Brite 201H
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Items Material Dimension Structure Prism Layer Acrylic Height 32㎛, Pitch 50㎛ Base Layer PET 50㎛/125㎛/188㎛/250㎛ Application Mobile, Note-PC, MNT, TV Product Line 2mil, 5mil, 7mil, 10mil (* Brite 200-2Mil : Height 15㎛,Pitch 25㎛)
Test Item Condition Result Optical Test Brightness
19” (gain)LGP + Diffuser sheet + Brite 201H + Protective sheet
(*Ref. : LGP + Diffuser sheet + Brite 200 + Protective sheet)106.5% Reliability
TestHeat Shrinkage TD Heat Shrinkage (150℃*30min) 0.29% MD Heat Shrinkage (150℃*30min) 0.85% Constant
Temp. &
Humidity
(Lamp on)60 ℃, 75% RH for 100 hrs - △gain 2.6% 60 ℃, 75% RH for 100 hrs - △E 0.45 High Temp. 70 ℃ for 300 hrs - △gain 8.5% 70 ℃ for 300 hrs - △E 0.31 Low Temp. -30 ℃ for 100 hrs - △gain 0.5% -30 ℃ for 100 hrs - △E 0.19
Micro-lenses are formed on the substrate film to diffuse light evenly, in addition to enhancing brightness.
- Brite 305
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Items Material Dimension Structure Prism Layer Acrylic Height 32㎛, Pitch 50㎛ Base Layer PET 188㎛/250㎛ Application TV Product Line 7mil, 10mil (* Brite 200-2Mil : Height 15㎛,Pitch 25㎛)
Test Item Condition Result Optical Test Brightness
32” (gain)1. LGP + Brite 310 + Brite 310
(*Ref. : LGP + MLF + MLF)
2. LGP + Brite 310
(*Ref. : LGP + MLF) * MLF : Competitor101.0%
100.0%Reliability
TestHeat Shrinkage TD Heat Shrinkage (150℃*30min) 0.28% MD Heat Shrinkage (150℃*30min) 0.78% Constant
Temp. &
Humidity
(Lamp on)60 ℃, 75% RH for 100 hrs - △gain 0.9% 60 ℃, 75% RH for 100 hrs - △E 0.58 High Temp. 70 ℃ for 300 hrs - △gain 0.8% 70 ℃ for 300 hrs - △E 1.75 Low Temp. -30 ℃ for 100 hrs - △gain 0.8% -30 ℃ for 100 hrs - △E 0.22
- Brite 310
-
Items Material Dimension Structure Prism Layer Acrylic Height 50㎛, Pitch 50㎛ Base Layer PET 188㎛/250㎛ Application TV Product Line 7mil, 10mil (* Brite 200-2Mil : Height 15㎛,Pitch 25㎛)
Test Item Condition Result Optical Test Brightness
32” (gain)1. LGP + Brite 310 + Brite 310
(*Ref. : LGP + MLF + MLF)
2. LGP + Brite 310
(*Ref. : LGP + MLF) * MLF : Competitor102.0%
101.5%Reliability
TestHeat Shrinkage TD Heat Shrinkage (150℃*30min) 0.28% MD Heat Shrinkage (150℃*30min) 0.78% Constant
Temp. &
Humidity
(Lamp on)60 ℃, 75% RH for 100 hrs - △gain 0.9% 60 ℃, 75% RH for 100 hrs - △E 0.58 High Temp. 70 ℃ for 300 hrs - △gain 0.8% 70 ℃ for 300 hrs - △E 1.75 Low Temp. -30 ℃ for 100 hrs - △gain 0.8% -30 ℃ for 100 hrs - △E 0.22
Hybrid prism sheets have the same prism structure as conventional prism sheets, however, the opposite side is powder coated to diffuse light to implement the functions of diffusion film and prism film with this single optical film.
- Brite 500
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Items Material Dimension Structure Prism Layer Acrylic Height 32㎛, Pitch 50㎛ Base Layer PET 125㎛/188㎛/250㎛ Haze Layer PS, Acrylic 4~10㎛ Application MNT, TV Product Line 5mil, 7mil, 10mil (* Brite 200-2Mil : Height 15㎛,Pitch 25㎛)
Test Item Condition Result Optical Test Brightness
19” (gain)1. LGP + Diffuser Sheet + Brite 500
( Ref. : LGP + Diffuser sheet + Brite 200 + Protective sheet )100% Reliability
TestHeat Shrinkage TD Heat Shrinkage (150℃*30min) 0.66% MD Heat Shrinkage (150℃*30min) 0.84% Constant
Temp. &
Humidity
(Lamp on)60 ℃, 75% RH for 100 hrs - △gain 2.8% 60 ℃, 75% RH for 100 hrs - △E 1.75 High Temp. 70 ℃ for 300 hrs - △gain 6.3% 70 ℃ for 300 hrs - △E 1.03 Low Temp. -30 ℃ for 100 hrs - △gain 2.1% -30 ℃ for 100 hrs - △E 0.71
- Brite 505H
-
Items Material Dimension Structure Prism Layer Acrylic Height 32㎛, Pitch 50㎛ Base Layer PET 125㎛/188㎛/250㎛ Haze Layer PS, Acrylic 5~15㎛ Application Note-PC, MNT, TV Product Line 5mil, 7mil, 10mil (* Brite 200-2Mil : Height 15㎛,Pitch 25㎛)
Test Item Condition Result Optical Test Brightness
19” (gain)LGP + Diffuser Sheet + Brite 505H
(*Ref. : LGP + Diffuser sheet + Competitor sheet)105% Reliability
TestHeat Shrinkage TD Heat Shrinkage (150℃*30min) 0.65% MD Heat Shrinkage (150℃*30min) 0.82% Constant
Temp. &
Humidity
(Lamp on)60 ℃, 75% RH for 100 hrs - △gain 2.0% 60 ℃, 75% RH for 100 hrs - △E 1.0 High Temp. 70 ℃ for 300 hrs - △gain 3.1% 70 ℃ for 300 hrs - △E 4.0 Low Temp. -30 ℃ for 100 hrs - △gain 0.5% -30 ℃ for 100 hrs - △E 0.2
The BLU is enhanced with bright line blocking characteristics and workability. Prisms are varied in their size and shape. High haze layer on the back side provides blocking.
- Brite 600
-
Items Material Dimension Structure Prism Layer Acrylic Height 35㎛, Pitch 50㎛ Base Layer PET 188㎛/250㎛ Haze Layer PS, Acrylic 10~30㎛ Application MNT, TV Product Line 7mil, 10mil (* Brite 200-2Mil : Height 15㎛,Pitch 25㎛)
Test Item Condition Result Optical Test Brightness
19” (gain)1. LGP + Diffuser Sheet + Brite 600
(*Ref. : LGP + Diffuser sheet + Brite 500)101% Reliability
TestHeat Shrinkage TD Heat Shrinkage (150℃*30min) 0.35% MD Heat Shrinkage (150℃*30min) 0.65% Constant
Temp. &
Humidity
(Lamp on)60 ℃, 75% RH for 100 hrs - △gain 1.4% 60 ℃, 75% RH for 100 hrs - △E 1.2 High Temp. 70 ℃ for 300 hrs - △gain 3.0% 70 ℃ for 300 hrs - △E 4.3 Low Temp. -30 ℃ for 100 hrs - △gain 0.5% -30 ℃ for 100 hrs - △E 0.2
