First, the shortcomings of O LED
1, the life is usually only 5,000 hours, less than the life of the LCD at least 10,000 hours;
2, can not achieve mass production of large-size screen, so currently only applicable to portable digital products;
3, there is a problem of insufficient color purity, it is not easy to display bright, rich colors.
Today's OLEDs have a life span of more than 5,000 hours, and have produced larger OLED panels with very bright colors.
As of July 2007, the highest performance of fluorescent materials is the material of Idemitsu Kosan. Red light efficiency reaches 11cd/A, life expectancy is up to 160,000 hours; green light efficiency reaches 30cd/A, life expectancy is 60,000 hours; high efficiency, long-life blue light material BD-2 (0.13, 0.22) under development, efficiency It is 8.7 cd/A and has a life of 23,000 hours.
In terms of phosphorescent materials, UDC developed a red light material with a chromaticity coordinate of (0.67, 0.33), an efficiency of 15 cd/A, a working life of more than 150,000 hours at 500 cd/m^2, and a green color coordinate of (0.34, 0.61), the efficiency reaches 65cd/A, and the initial brightness is 1000 cd/m^2, the lifetime exceeds 40,000 hours; the most difficult blue color
The efficiency of the phosphorescent material reached 30 cd/A, and the lifetime reached 100,000 hours at an initial luminance of 200 cd/m^2.
In general, the luminous efficiency and luminescence lifetime of OLED red, green and blue materials basically meet the practical needs.
From the above data, the current OLED has at least 20,000 hours of operation at 500 cd/m^2.
Second, the advantages of OLED
1, the thickness can be less than 1 mm, only 1/3 of the LCD screen, and the weight is also lighter;
2, solid state mechanism, no liquid material, so the seismic performance is better, not afraid of falling;
3, there is almost no problem of viewing angle, even if viewed under a large viewing angle, the picture is still not distorted;
4, the response time is one thousandth of the LCD, showing that the moving picture will never have a smear phenomenon;
5, low temperature characteristics, can still display normally at minus 40 degrees, and LCD can not do;
6. The manufacturing process is simple and the cost is lower;
7, the luminous efficiency is higher, the energy consumption is lower than the LCD;
8. It can be fabricated on substrates of different materials and can be made into a flexible display that can be bent.
Piezoelectric ceramic disc
Quick delivery
High performance
Application: flow meter measurement
There are many kinds of USF used in closed pipeline according to the measuring principle, and the most commonly used are propagation time method and Doppler method. Among them, time difference ultrasonic flowmeter is used to measure fluid flow by the principle that the time difference of sound wave propagating downstream and countercurrent is proportional to the velocity of fluid flow. It is widely used in raw water measurement of rivers, rivers and reservoirs, process flow detection of petrochemical products, water consumption measurement of production process and other fields. According to practical application, time-difference ultrasonic flowmeter can be divided into portable time-difference ultrasonic flowmeter, fixed time-difference ultrasonic flowmeter and time-difference gas ultrasonic flowmeter.
Ultrasonic flow-meters use at least two transducers aligned so that ultrasonic pulses travel across the flow of liquid or gas in a pipe at a known angle to the flow.
Technical data:
Electromechanical coupling coefficient Kp: > 0.62
Dielectric Loss tg δ: <2%
Nominal Piezo discs for ultrasonic flowmeter:
OD14.2*1MHz PZT-51
OD14.6*1MHz PZT-51
OD15*1MHz PSnN-5
OD15*2MHz PSnN-5
OD20*1MHz PSnN-5OD20*2MHz PSnN-5
OD15*1MHz PZT-51
OD15*2MHz PZT-51
OD20*1MHz PZT-51OD20*2MHz PZT-51
Size, Frequency and Electrode on request.
Piezoelectric Discs For Flowmeter Sensor
Piezoelectric Ceramic Disc,Piezoelectric Discs For Flowmeter Sensor
Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com