The basic function of computer light guide and design and production process
May 18, 2022
Light guide plate PC as the name implies its main function is to guide the light designer's direction want necessary, and all light guide plate design to meet the needs of downstream products and LCD backlight module, most importantly, to achieve brightness and uniformity. Table lamp light guide plate light conversion rate is high (more than 30% higher than the traditional plate), uniform light, long life indoor can be used normally for more than 8 years, safe and environmentally friendly, durable and reliable indoor and outdoor can be applied. Non-standard round luminous guide plate lithography technology is a flat silicon wafer coated with a layer of corrosion-resistant photoresist, and then let the strong light through the photoresist plate, in the photoresist plate according to the production of a specific layer of graphic information for selective exposure; then the photoresist will be developed after taking off, the surface of the silicon wafer will be left with a micro-graphic structure of the film. The surface roughness of the luminous guide plate made by photolithography is poor, and the loss of light energy is relatively large. Outdoor lighting guide plate lights use optical grade acrylic sheet to absorb the light from the lamp to stay on the surface of the optical grade acrylic sheet, when the light is shot to each guide point, the reflected light will spread to all angles, and then destroy the reflection conditions by the front of the light guide plate. In the light guide plate of the light guide plate due to the shape, function and production method of general classification there are different classifications, but the point has no uniform method, after finishing.
1, the shape of the entry: flat plate and wedge-shaped plate (rotating swash plate)
Flat plate: light guide plate from the entry point is rectangular.
Wedge-shaped plate: from the point of entry light for one side is thick and the other side is thin into a wedge (triangle) shape.
2, according to the network for the production of teaching methods: printing type and non-printing type
Printing type: After finishing the shape processing of the light guide plate, the dot is printed on the reflector through printing, divided into IR and UV two kinds.
Non-printing type: Light guide plate with dots formed directly on the reflective surface during molding. Divided into chemical etching (etching), precision mechanical characterization method (V-cut), photolithography's (Stamper), internal diffusion.
3. Follow the entry mode: side entry light (lamp and LED) and straight down.
Light-entry side of the mode: light emitter (lamp or LED) placed on the side of the light guide plate.
Straight down type: Light emitter (lamp or LED) placed below the conventional light guide plate.
By molding method
4.: Injection molding and cutting molding...
Injection molding: Injection molding machine using high temperature optical grade PMMA pellets, high pressure into the molding mold for cooling.
Cutting and forming: The optical grade PMMA raw board will be cut through the cutting process to complete a finished product.
Light guide plate manufacturing process.
Before understanding the process, you should understand the computer light guide plate
Required parts
As shown in Figure
1, the parts and tools required
a. Injection molding: optical grade PMMA particles, ink
b. Cutting: optical grade PMMA plate, ink
As shown in Figure
2, ink: divided into two kinds of IR and UV
flat cutting guide plate production teaching method for three important parts:
The first is the shape of the acrylic plate processing.
The second is the production of stencil ;
The third printing, which is the processing flow
a. acrylic shape for processing = original plate cutting 〉 mirror planing 〉 forming technology processing
b. Stencil production = dot design > negative yield > single network yield
C. printing = acrylic washing > printing > baking (IR) or ultraviolet radiation (UV)
4, shot a forming guide plate technology is divided into traditional printing type and non-printing type two, the process on the basic situation is the same, for in the casting of Chinese molds printing type and not in the shot will be cast on the dot, so its shot out of the finished product is also only acrylic shape, to be formed and then after our printing enterprises to complete the global guide plate, and not through the printing type is designed to cast the dot on our molds, so that the dot and Light guide plate in the injection of different forming can be completed at the same time.
