A bonding method for dlp combined splicing glass screens
A bonding method and screen technology, applied in optics, instruments, projection devices, etc., can solve the problems that the bonding process is difficult to meet the requirements, cannot be used, and the gap in adhesive strength is large, and achieves improved physical and optical visual effects. , the effect of a wide range of applications
Active Publication Date: 2016-10-12
NINGBO GQY VIDEO &TELECOM
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Problems solved by technology
[0006] Due to thermal expansion and contraction, the temperature rise will cause the resin screen in the glass screen (including the Fresnel lens made of resin and the resin imaging screen) to expand and bulge around and front and back, such as the bonding strength of the edge of the glass screen Insufficient, there will be a hidden danger of glass falling off
[0007] Over the years, major domestic large-screen splicing manufacturers have invested heavily in this, conducted numerous tests, and finally basically determined that UV glue is the best substitute, but finally failed due to the large gap in adhesive strength. A breakthrough can be made. Major companies only use UV glue on temporary small demonstration splicing screens for a short time, and it is impossible to use it in engineering projects.
In addition to the choice of glue, the bonding process is also critical to the splicing quality of the DLP combined splicing glass screen, but the existing bonding process is difficult to meet the requirements, and the optical splicing effect of the large screen is not ideal
Method used
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[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0025] The bonding method of the DLP combined splicing glass screen of the embodiment comprises the following steps:
[0026] 1) Clean the four sides of the glass screen with a size of 67 inches and a thickness of 4mm with absolute alcohol repeatedly for more than two times, and then evenly coat a layer of primer on the four sides of the glass screen. The primer is Guangzhou Elite The oil-water separation agent produced by the company is F7701;
[0027] 2) In a construction site where the temperature is 23-25°C, the constant humidity is below 50%, and the particle size of air pollutants is in the millions, apply glue evenly on the four sides of the glass screen coated with primer. The glue used is Guangzhou The model T3422B high-strength UV glue produced by Elite Company forms a glue layer with a thickness of 0.25±0.02mm on the four sides of ...
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Abstract
The invention discloses a bonding method for a DLP (digital light processing) combined spliced glass screen. The bonding method comprises the following steps: (1) uniformly coating four edges of a glass screen with a layer of primer; (2) applying a high-strength UV (ultraviolet) adhesive. The bonding method for the DLP combined spliced glass screen disclosed by the invention is used for bonding and fixing the glass screen with a PC (polycarbonate) sheet by adopting the high-strength UV adhesive to achieve a purpose of bonding the glass screen. The bonding strength between the high-strength UV adhesive and the ultrathin transparent PC sheet can reach 2.0-2.6 KG (4 mm thick glass edge and 90-degree stripping force), and the high-strength UV adhesive is cooperatively used with the ultrathin transparent PC sheet while the bonding strength is guaranteed, so that after glass screens bonded with the method are subsequently spliced to form a large DLP screen, the light transmittance of the glass screen in a thickness direction reaches more than 95%, physical and optical visual effects of splicing seams of the large screen are greatly improved, and seamless splicing is truly realized. The method is wide in application range and can be applied to bonding of various DLP combined spliced glass screens with the sizes being 50-80 inches and the thicknesses being 3-4 mm.
Description
technical field [0001] The invention relates to the field of making DLP rear projection splicing screens, in particular to a bonding method for DLP combined splicing glass screens. Background technique [0002] The screens of the DLP rear projection splicing system mainly include resin screens and glass screens. When the ambient temperature changes greatly, the resin screen will cause a large change in the flatness of the screen due to thermal expansion and contraction, and the screen will be deformed. The imaging point is distorted due to the inconsistent length of the optical path. The glass screen will not produce this phenomenon, therefore, the glass screen is the mainstream screen of the DLP rear projection splicing system. [0003] Both of the above two screens adopt edge bonding technology. On the four sides of a single screen with a thickness of only 4 mm, the screen is bonded together with a transparent PC sheet with a thickness of 0.175 mm through glue, and then m...
Claims
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IPC IPC(8): G03B21/56
CPCG03B21/56
Inventor 俞耀明
Owner NINGBO GQY VIDEO &TELECOM