The brightening film, BREF for short, is an optical film with uniform prism pattern, which is made of acrylic resin on the surface of pet with very good transparency. The brightening film is also called prismatic lens.
Prism is a famous light amplifier. It uses a similar prism, corresponding to different incident angles of light, with different angles of refraction, to increase the front brightness of the screen. Prism film is an optical film which is made of acrylic resin prism structure on pet substrate by 3M micro replication technology. Its surface is a micro prism structure with a height of about 20-50 microns.
According to the principle of geometrical optics, the light emitted from the backlight is circularly acted by the prism film and the backlight system, and finally converges in the front direction, so as to achieve the brightening effect.
Characteristics of the brightener
1. At present, prismatic lenses widely used in the market are mainly single-sided structures.
2. Most of the lines of brand materials are rolled up 180 degrees, and very few will be rolled up 90 degrees.
3. Both sides of the raw material are covered with a protective film. One is thick and the other is thin. (due to different brands and models, please confirm prismatic mirror and pet surface according to material property table)
Note: because some brands of materials will be matted on the pet surface, it is not recommended to use hand feeling to distinguish the prism mirror and pet surface.
Application of light adding film
Laptop, LCD, LCD TV, portable DVD player, vehicle navigation system, touch screen mobile phone, digital camera, digital camera equipment, etc.
If it is assembled in front of the backlight and the light emitted from the light source is gathered in the direction of the user of the display device, the front brightness can be increased by about 100% (there are horizontal and vertical bef in case of two orthogonal use). Moreover, the unused light outside the viewing angle is recycled according to the re reflection effect of the light and gathered to the user at the most appropriate angle.
Principle of concentrating film
It is to use micro display prism Technology (light refraction principle) to focus omni-directional beams into small angle beams, which can reduce the brightness of side angle to improve the brightness of the middle angle. A spotlight film can only focus the beam perpendicular to the prism (stripe) to improve the brightness by 60%, and two perpendicular spotlights can focus omni-directional beams, at the same time, it can Increase by 120%, and the schematic diagram is shown as follows:
Features
1. Gather the scattered light from the light source in the front direction to improve the brightness.
2. In the case of two pieces of orthogonal use, the front brightness can be increased by about 100%.
3. The thickness is only 65-220 μ m, which has no effect on the thickness of display equipment.
The bad conditions of M-glass products are summarized as follows:
1、 Dimple
Acceptable bad condition: shallow and hard to find vortex like (no obvious ring around the vortex).
Reject bad condition:
1. The center point is white, the appearance is black and then white ring, the outermost is black ring (swirl).
2. The center point is concave, and the other two sides are anti white shape of triangle.
2、 Black / color spot
If the diameter is greater than or equal to 0.2mm, it shall be judged as defective product.
Causes: adhesion of foreign matters and production transformation.
3、 White / bright spot
If the diameter is greater than or equal to 0.2mm, it shall be judged as defective product.
Causes: poor mold, foreign matter attachment, material itself factory.
4、 Poor handling
Nail marks or bends, etc.
Cause: poor handling.
5、 Scratch
It can be divided into two kinds of scratches that are parallel or not parallel to the edges and corners.
Acceptable bad condition: slight or dull scratch.
Reject bad condition: coarse or bright scratches, see this judgment according to the limit.
6、 Stain
Opaque or foggy spots (or other spots not clearly identified).
Cause: caused by protective film or mould.
7、 Foreign matter (containment)
If the foreign matter is located between the polishing plate and the protective film, it can be removed by air blowing gun, or by using 467 / 468 glue stick, and other methods are not available; if it cannot be eliminated, it can be determined whether it is a defective product according to the second and third standards.
Cause: due to the adhesion of processing process or material itself.
8、 Damage
A series or group of dents.
Causes: foreign matter extrusion or pet hard strip.
9、 Orange peel
A series or group of dents.
Causes: foreign matter extrusion or pet hard strip.
10、 Unevenness
A shadow or long dent, usually 4-6 inches from the edge.
Causes: often occurs in the inner layer of the end of the product, bending due to large stress.
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