Main Technical Indicators Of ITO Glass For LCD Screen Digitizer
Main technical indicators of ITO glass for LCD Screen Digitizer
The conductive glass used in the manufacture of LCDS must meet certain requirements to produce a qualified product. Specifically, there are the following index requirements.
Good light transmittance
The conductive glass must be transparent, usually requiring a transmittance of over 80% in the visible range. The transmittance of ITO glass depends mainly on glass material, LCD Screen Digitizer thickness and refractive index.
Light transmittance is an important optical performance index for transparent materials. Light transmittance to the luminous flux through the material and the incidence of the percentage of the ratio of the luminous flux, said usually refers to the standard "C" vertical irradiation light source, a parallel light transparent or translucent materials, show material flux of T2 and the percentage of the ratio of the incident light flux T1.
Tt = T2 / T1 * 100
The test principle of transmittance is to test the relative value of T1 and T2. When there is no incident light, the receiving light flux is 0. When there is no sample, the incoming light is all filtered through, and the luminous flux received is 100, i.e., T1; If the sample is placed, the instrument receives the light flux at T2. The test instrument for transmittance is the photometer.
Liquid crystal screen digitizer - SMT process
SMT is a simplified Chinese version of Surface Mounted Technology.
SMT process is LCD Screen Digitizer display driver circuit board (PCB) of one of the manufacturing process, it is with SMT equipment to SMT components (chip, resistance, capacitance, etc.) on the PCB board with solder paste to the corresponding welding plate position, and through the backflow devices and components on the PCB welding a processing method.
The process includes five processes: silk seal, patch, reflux, cleaning and testing. SMT process due to the size of SMT components (especially the chip) (package size), the chip pin clearance quantity and the influence of precision and it is suitable for the larger area of PCB processing, and due to the solder joint is bare, are highly susceptible to damage, but easy to maintenance.
The manufacture of optical engraving of LCD Screen Digitizer digital instrument
Photoengraving usually USES two methods, one of which is the traditional method of photoengraving. One is to use the computer to process the light drawing version.
1. Camera plate
The enlarged red film (usually magnified 10 times) is fixed on a panel, and the original drawing is initially reduced with the initial drawing. After the initial shrinkage of the image, it is used to shrink the image with the same size as the design requirements. Then step by step to expose, to make the production process requirements of a large LCD screen digital.
The digital screen of the LCD Screen Digitizer usually has a negative first and then turns into a proper piece for production. The making process is simply photography; And then for the camera (exposure) development in the developer, to fixing the image after enhancement, the liquid on the rinse again, rinse clean and dry after 'last will spare parts cut at the edges, packaging and delivery production use.
2. Light rendering
The contrast between the light and photographic plates is that it replaces most of the manual operations with instruments. Specifically, it is to convert the computer design graphics software into the files that the optical paint machine can run, and the light source of the drawing machine is directly exposed to the form that is completely consistent with the design requirements. It is characterized by high precision and fast speed.