In recent years, with the rapid development of electronic products and mobile phones, liquid crystal displays have also achieved unprecedented development. As a country with a large population, the demand for smart phones is a huge market, which has also promoted the rapid development of the light guide plate industry. The molding of the light guide plate mainly uses injection molding technology, which is recognized as one of the most efficient methods on the market.
The light source of the liquid crystal display is provided by the backlight module, and the quality of the light source of the backlight module determines the effect of the liquid crystal display. With the development of science and technology and the improvement of people's living standards, liquid crystal displays have more stringent requirements in terms of brightness and color, which requires higher-quality backlight modules. The light guide plate is the propagation medium of the light source of the backlight module, and its dot arrangement, shape and material composition determine the brightness, uniformity of distribution and light extraction efficiency of the light source.
The light guide plate is a key part of the liquid crystal display technology. Its main function is to destroy the total reflection of light in the light guide plate by making a fine structure on the light guide plate, so that the lateral light can be guided to the LCD display screen and the brightness of the entire display screen is uniform. The light guide plate is divided into printing type and non-printing type according to the production principle. The non-printing light guide plate is formed by precision molds, so that the light guide plate is directly formed with dense tiny dots on the plane of the light guide plate during the molding process. Non-printing molding technology is more difficult.
The precision required by the light guide plate mold is in the micron level, which belongs to the category of precision micro-nano processing. The traditional combination of servo motor and screw drive can no longer meet the needs of micro-nano technology in the processing and manufacturing industry, resulting in many new micro-displacement drive components, such as voice coil motors, piezoelectric ceramic drives, and so on. Among them, piezoelectric ceramics have become the first choice for micro-nano applications due to their advantages of high displacement control accuracy, fast response speed, large driving force, low driving power and wide operating frequency. Because processing the microstructure on the light guide plate mold requires a small feed stroke, and the required accuracy and frequency are high, piezoelectric ceramics can be used as the core driving element of the collision machine.
As the core driving element for microstructure processing of light guide plate molds, piezoelectric ceramics require excellent characteristics such as high precision, fast response, and large output. The piezoelectric ceramic actuator produced by CoreMorrow has nanometer-level resolution, a stroke of up to 260 microns, and a microsecond response time. At the same time, it is protected by a cylindrical stainless steel outer shell. The internal mechanical preload is suitable for high load and high dynamics application scenarios. CoreMorrow's piezo actuators are small in size and highly integrated, which are suitable for the integrated design and development of equipment. At present, CoreMorrow's piezoelectric actuators have been used in the production and processing of light guide plate molds.
CoreMorrow's piezo actuator is installed in the precision impact equipment of the light guide plate mold which is showed in below picture.
CoreMorrow's Piezo Actuator
CoreMorrow has hundreds of piezo actuator products, which integrate high-reliability, stacked, low-voltage/high-voltage PZT piezoelectric ceramics, and generate an output of 50000N, making it very suitable for machine tools, active vibration insulation or adaptive Mechanics. The small size and high resonant frequency of the packaged piezoelectric ceramic actuator make it very suitable for scanning microscopy, laser tuning, beam deflection, patch clamp or interference shift applications.
Direct Drive Mechanism
CoreMorrow's piezoelectric ceramic actuator adopts a piezo direct-drive structure, which is characterized by large output and fast response speed. It can be equipped with a sensor for closed-loop feedback.
The top and bottom of the packaged piezo actuator are fixed by threads respectively, and the fixing method can be customized, such as external thread, internal thread, ball head, flat head, etc.
Open Loop & Closed Loop
Packaged piezo actuators can be divided into open loop (no positioning feedback sensor) and closed loop (integrated positioning feedback sensor) versions. Under open loop, its resolution is infinitely high, only limited by the noise of the control device, but due to the hysteresis and creep characteristics of piezoelectric ceramics, its repeatability and stability are low. But the closed-loop version will solve the problem of hysteresis and creep.
Customizable
CoreMorrow can customize the design of piezoelectric ceramic actuators, such as customized connection terminals, customized air-cooled vents, customized sealing, waterproof and oil-proof, customized shape and structure, etc., making the product easier to integrate into the user's equipment.
Examples of Parameters
Model: PSt150/10/40VS15
Nominal stroke: 38μm
Stiffness: 60N/μm
Push/pull force: 2300/250N
Electrostatic capacity: 7.2μF
Resonance frequency: 20kHz
Length L: 46mm
Sensor: optional
If you have any questions,please feel free to contact me.Thanks!
CoreMorrow Ltd.
Add:1F,Building I2,No.191 Xuefu Road,Nangang District,Harbin,China
Website:www.coremorrow.com
Skype/WhatsApp/WeChat:+86-18903601882
Email:yct@coremorrow.com