Antiglare film and process for producing the same

Abstract

Disclosed are an antiglare film having a high level of anti-scintillation properties, high sharpness of transmitted images, high light transmittance (total light transmittance), and a high level of external light reflection preventive properties, and a process for producing the antiglare film. A resin and non-agglomerative particles having a specific particle diameter are selected so that the difference in refractive index between the resin and the particles is 0.05 to 0.15. The resin and the non-agglomerative particles are brought to a coating composition using, as a solvent, a good solvent for the resin and a poor solvent for the resin. The coating composition is coated onto a substrate film to form a coating which is then dried. In the course of the drying, as the amount of the good solvent in the coating decreases, the poor solvent acts to cause the gelation of the particles and the resin. Thus, good concaves and convexes can be advantageously formed on the surface of the coating. The layer thus formed can meet various property requirements for antiglare films.

Description

[0001] This is a Continuation of application Ser. No. 10 / 747,227 filed Dec. 30, 2003, which in turn is a Division of U.S. Ser. No. 09 / 576,241 filed May 24, 2000. The entire disclosures of the prior applications are hereby incorporated by reference in their entirety.TECHNICAL FIELD [0002] This invention relates to an antiglare film which, when disposed on the front of CRTs (cathode ray tubes) displays or liquid crystal displays, serves to diffuse light externally incident on these displays, thereby reducing glare. BACKGROUND ART [0003] In CRT displays, accelerated electrons collide with phosphors located on the inner side of the front glass to impart energy to the phosphors. This permits the phosphors to emit light, and, in general, red, green, and blue lights outgo on the front side. In liquid crystal displays, the liquid crystal per se does not emit light. Since, however, light is applied from the backside to enhance the visibility of liquid crystal images, on the whole of the disp...

AI Technical Summary

Benefits of technology

[0010] Accordingly, it is an object of the present invention to provide an antiglare film simultaneously satisfying all of the property requirements, that is, (1) high anti-scintillation properties, (2) high sharpness of transmitted images, (3) high total light transmittance, and (4) high external light reflection preventive properties without significantly altering the form of the conventional antiglare film, that is, the thin film form, and a process for producing the same.

[0020] then drying the coating to reduce the weight ratio of the good solvent to the light-transparent resin, whereby, while allowing the light-transparent fine particles and the light-transparent resin to gel, the coating is solidified to create concaves and covexes on the surface of the coating.

Problems solved by technology

This causes glaring of the display screen or reflection of a fluorescent lamp on the display screen, making it difficult to perceive letters and the like displayed on the screen.

However, when light emitted from the display toward the front is passed, through the antiglare film, shining called “scintillation” occurs on the film surface, disadvantageously posing a problem of deteriorated visibility of displayed images.

None of the conventional antiglare films simultaneously satisfy all the above property requirements.

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