The job operation of light guide plate
Technical field: the present invention relates to the light guide plate in a kind of LCD, particularly relate to a kind of job operation of light guide plate.
Technical background: in LCD, the effect of light guide plate is the scattering direction of direct light, is used for improving the brightness of panel, and guarantees the homogeneity of panel luminance, and the quality of light guide plate is very big to the backlight influence.Light guide plate generally adopts the method for ejection formation that propylene is pressed into ganoid plate.Then with having the high reflection and the material of extinction not, mode in the bottom surface of light guide plate with screen painting stamps the diffusion point, cold-cathode fluorescence lamp is positioned at the thick end of light guide plate side, the light utilization reflection that cold-cathode tube sent is toward thin end conduction, when light was mapped to the diffusion point, reflected light can destroy conditioned reflex and penetrate by light guide plate is positive then toward all angles diffusion, utilize various densitys, diffusion point not of uniform size, can make the light guide plate uniformly light-emitting.Light guide plate can be divided into printing-type and non-printing-type again according to the technological process difference, and printing-type is the apparatus high reflectance and the material of extinction not on the acryl flat board, stamps circular or square diffusion point at bottom surface of light guide plate with screen printing.Non-printing-type is to utilize precision die to make light guide plate when ejection formation, adds the graininess material of a small amount of different refractivity in propylene material, directly forms the microscopic bumps of gathering, and it acts on as the site.It is low and produce advantage fast that the light guide plate of printing-type has cost of development, but it is inhomogeneous to exist astigmatism, site problem such as easily come off.But not printing-type then requires machining precision height, defectives such as long processing time.
Summary of the invention: order of the present invention and a kind of job operation of light guide plate will be provided exactly, it can overcome above printing-type effectively and non-printing-type is made the existing problem of light guide plate.The object of the present invention is achieved like this, and the job operation of light guide plate is to make round dot on computers, makes sensitive film then, sprays photoresists on metal form, and the photoresists spraying is even, and template need be processed smooth; Between template and sensitive film, vacuumize, sensitive film and template are combined closely, seamless; Use UV-radiation-sensitive, the round dot sensitization on the sensitive film on template, is controlled at 90-110 second timing up; Use striping liquid with photoresists flush away on the template, the temperature of striping liquid is controlled at 15 ℃-45 ℃, and the time is controlled at 25-35 in second; With the round dot on 50 ℃-80 ℃ the liquor ferri trichloridi corrosion template, the time is 5-8 minute, cleans template, and assembly jig is injection molded into light guide plate.The present invention has the machining precision height, during the light guide plate leaded light produced brightness even, round dot difficult drop-off, characteristics such as processing technology is simple, and is convenient.
Embodiment: the job operation of light guide plate of the present invention is to make round dot on computers, makes sensitive film then, sprays photoresists on metal form, and the photoresists spraying is even, and template need be processed smooth; Between template and sensitive film, vacuumize, sensitive film and template are combined closely, seamless; Use UV-radiation-sensitive, the round dot sensitization on the sensitive film on template, is controlled at 90-110 second timing up; Use striping liquid with photoresists flush away on the template, the temperature of striping liquid is controlled at 15 ℃-45 ℃, and the time is controlled at 25-35 in second; With the round dot on 50 ℃-80 ℃ the liquor ferri trichloridi corrosion template, the time is 5-8 minute, cleans template, and assembly jig is injection molded into light guide plate.
Be the work flow of this light guide plate below
Make sensitive film → on metal form, spray photoresists (vacuumizing) → make sensitive film and closely (ultraviolet ray) → sensitization of template (striping liquid, 15 ℃-45 ℃) → go photoresists (ferric chloride solution, 50 ℃-80 ℃) → corrosion (tap water) → cleaning (assembly jig) → be injection molded into light guide plate.During concrete enforcement, sensitive film completes on computers, mainly be to make round dot (site) on computers, make sensitive film then, the uniform photoresists of spraying on mould, described template need be processed smooth, sensitive film is closely contacted with template, and between it extracting vacuum, adopt ultraviolet ray irradiation sensitization then, be controlled at timing up about 100 seconds; Template after the sensitization is placed on temperature to be controlled at and to soak the photoresists of removing on the template in 25 seconds to 35 seconds in the striping liquid between 15 ℃-45 ℃; Removing template behind the photoresists, to be put into temperature again be to soak 5-8 minute in 50 ℃-80 ℃ the liquor ferri trichloridi.The round dot of corrosion on the template recessedly goes out it, and the time length of being corroded has determined the degree of depth of site; The template that corrosion processing is good is placed on flushing under the tap water, makes its template cleaning; Be assembled in the material injection moulding of back adding injection moulding on injection machine on the mould, can be squeezed into light guide plate.