PS Guide Plate

1. Product Overview
PS light guide plate, full name polystyrene light guide plate, is a high-tech product made of optical grade PS sheet, mainly used to efficiently convert point light source or line light source into uniform surface light source. Its working principle is based on the principle of optical reflection and refraction. By using laser engraving, UV screen printing and other technologies to print light guide points on the bottom of the PS sheet, when the light enters the light guide plate from the light entrance, it encounters the light guide points during the propagation process in the plate, and the light will be reflected and scattered, and then diffused in all directions, and finally evenly emitted from the front of the light guide plate to achieve a surface luminous effect. It is usually rectangular when viewed from the light entrance, but it can also be processed into other shapes such as wedges (inclined plates) according to actual needs to meet the installation and use requirements of different scenarios.

2. Performance Advantages
High light transmittance: Made of high-quality PS material, PS itself has good transparency, which makes the light guide plate have a high light transmittance, generally up to 88%-92%, which can ensure that the light is efficiently transmitted in the plate and reduce the loss of light energy, thereby providing sufficient light basis for the final light output effect, making the light emitted by the light guide plate brighter and clearer.
Excellent light guide uniformity: Through advanced dot design and production technology, such as laser engraving of light guide points with reasonable size and density, or using precise printing technology to form light guide patterns, the propagation path and scattering angle of light can be effectively controlled, so that the light is evenly distributed in the light guide plate, and then achieves a highly uniform effect when it is emitted from the light output surface. In some high-quality PS light guide plate products, the luminous uniformity can reach 90% or even higher, completely eliminating the common problems of uneven brightness and dark areas in ordinary lighting or display, and presenting a uniform and consistent luminous effect.
Good physical properties: PS material has a certain rigidity and strength, so that the light guide plate is not easy to deform in daily use, and can maintain a stable optical structure to ensure long-term and reliable light guide performance. At the same time, it also has excellent electrical insulation, which can effectively avoid safety hazards or performance degradation caused by electrical problems, and is suitable for a variety of application scenarios that require electrical safety. Moreover, the thermal stability of the PS light guide plate is good, and it can maintain stable performance within a certain temperature range, and there will be no obvious fluctuations in optical performance due to temperature changes.
Thin and light characteristics: PS light guide plates can be made very thin and light, with a thickness usually between 1-5mm. Compared with some other traditional light guide materials or lighting components, the overall weight is greatly reduced, which is not only convenient for installation and transportation, but also provides more flexibility for product design, which helps to achieve the thinness and miniaturization of products, and meet the high requirements of the modern market for product appearance and space utilization.
Good chemical stability: PS light guide plates have good tolerance to common acids, alkalis, redox agents, alcohols and detergents. In general use environments, they will not react chemically due to contact with these chemicals, resulting in material damage or optical performance degradation, thereby ensuring long-term service life and reliable performance, and are suitable for use in different indoor and outdoor environments.

3. Manufacturing process
Laser engraving process: Using a high-energy-density laser beam, the bottom surface of the PS light guide plate is precisely engraved according to the pre-designed pattern and parameters to form tiny light guide points or light guide structures. This process has extremely high precision and can achieve precise control of parameters such as the size, depth, and spacing of the light guide points to meet different light guide requirements. By controlling the motion trajectory of the laser head and the laser output energy through computer programming, a complex and personalized light guide dot layout can be produced, which is suitable for high-end products with extremely high requirements for light guide uniformity and optical performance, such as light guide plates for large LCD backlight modules. However, the laser engraving process is relatively slow and the equipment cost is high, which affects production efficiency and cost to a certain extent, but for application scenarios that pursue extreme quality, its advantages are obvious.
UV screen printing process: This process is to first make a screen with a light guide pattern, and then screen print UV ink containing high reflectivity or scattering rate materials onto the bottom surface of the PS light guide plate. During the printing process, the ink is transferred to the surface of the light guide plate through the mesh holes of the graphic part on the screen by the extrusion of the scraper, forming the required light guide dot pattern. After printing, the ink is quickly dried and solidified by UV light curing, and firmly combined with the light guide plate. The advantages of UV screen printing process are relatively low cost and high production efficiency. It can meet the needs of large-scale production and is suitable for application fields that are sensitive to cost and have moderate requirements for light guide performance, such as ordinary advertising light boxes and signboards. However, this process is slightly inferior to laser engraving in terms of dot accuracy and uniformity control, and may cause problems such as blurred dot edges and uneven ink thickness, which affect the final light guide uniformity.
Hot pressing process: The mold with a specific light guide structure and the PS light guide plate substrate are hot pressed under high temperature and high pressure to transfer the light guide structure on the mold to the PS plate. This process can produce a light guide plate with a complex three-dimensional light guide structure, which can effectively improve the light guide efficiency and uniformity. The hot pressing process is suitable for mass production of light guide plate products with regular shapes and relatively fixed structures, and has high production efficiency. However, the initial mold development cost is high and the cycle is long. Once the mold is determined, it is difficult to change the light guide structure later and the flexibility is poor. It is suitable for application scenarios with relatively stable product design and high demand, such as some standardized light guide plates for lighting fixtures.

4. Application fields
Advertising light boxes and signboards: In the field of commercial advertising, PS light guide plates are widely used in the production of various light boxes and signboards. Its uniform light guide effect can make the advertising images clearer and more eye-catching, effectively attracting the attention of passers-by. Whether it is a small shop sign on the street or a brand display light box in a large shopping mall, the PS light guide plate can provide it with bright and uniform backlight to enhance the advertising display effect. Moreover, its light and thin characteristics facilitate the installation and hanging of the light box and save space. For example, the use of PS light guide plates in the sign light boxes of chain convenience stores can ensure that clear and bright brand logos are continuously provided 24 hours a day, and they can also be particularly eye-catching at night, enhancing the brand's recognition and communication power.
LCD display backlight module: As a key component of the backlight module of electronic devices such as liquid crystal displays (LCDs), laptops, and tablets, the PS light guide plate plays a vital role. It can evenly distribute the light emitted by the backlight source throughout the display area, providing a stable and uniform backlight source for the LCD panel, so that the screen can display clear and bright images. Due to the high light transmittance and excellent light uniformity of PS light guide plates, the contrast, color saturation and viewing angle of the display can be effectively improved, bringing users a better visual experience. In today's electronic equipment market, with the pursuit of thin and light, high-definition display, PS light guide plates, with their own advantages, have occupied an important position in the backlight modules of small and medium-sized LCD displays.
Indoor lighting decoration: In the field of indoor lighting and decoration, PS light guide plates can be used to make various creative lamps and decorative lighting products. For example, in the design of the chandelier in the hotel lobby, the lampshade made of PS light guide plates can evenly scatter the light emitted by the bulb, creating a soft and warm lighting atmosphere, avoiding the glare problem that may be caused by traditional lamps. At the same time, PS light guide plates can also be used to make indoor decorative wall lamps, ceiling light panels, etc. Through clever design and layout, they can add unique light and shadow effects to the interior space and enhance the beauty and comfort of the space. For example, in modern minimalist home decoration, PS light guide plates are embedded in the living room background wall to create a layered luminous background, which can be used as a decorative highlight and provide auxiliary lighting, creating a warm and technological living environment.
Automotive interior lighting: PS light guide plates are also increasingly used in automotive interior design. It can be used for lighting in car dashboards, center consoles, door interior panels and other parts, providing clear and soft light for drivers and passengers, facilitating operation and improving riding experience. The thin and light nature of PS light guide plates makes it easy to install in the small space of car interiors, and its good physical and chemical stability can adapt to the complex environment inside the car, such as temperature changes and vibrations. For example, some high-end car brands use PS light guide plates to make atmosphere lights in their interior designs, creating a comfortable and personalized in-car atmosphere through changes in different colors and brightness, and enhancing the quality and technological sense of the car interior.