Desire for a higher degree of market integration solutions for optical sensing
As microprocessors and digital signal processors, the development of very sophisticated equipment has become a part of our life. These ubiquitous devices is completely digital, but we live in a world is analog. Even if the digital system was becoming more intelligent and more sophisticated, they still have to receive information from the simulation of the real world can play a role.
Sensor is the real world and the ever-growing digital world, a bridge between all the different signals. Light sensor or photoelectric sensor is such a bridge, they constitute a growing sensor market. In the past some years, many people's interest has focused on high-speed fiber-optic communications, inevitably, also on the rapid movement of light pulses that pass the most intense interest. The performance of high-speed optical sensor which has made very significant progress. However, the handy optical sensor technology also includes another world, this is a need to deal with the world gigahertz optical pulse, although it requires a lower processing speed, but it has the same importance, even more common and deeper into our lives. The optical sensor technology from the scope of the world, including: fax machines, copiers, scanners, printers, garage door opener, liquid crystal displays, color meter, spectrometer, automotive and medical diagnostic instruments too numerous to mention.
Photoelectric sensor is such a device, it can produce and the projection of the effective area on the device in proportion to the number of light signals. Devices meet this definition there are many, but none more than the semiconductor photodiode general. Photodiode is based on a semiconductor development process of early detection: When the light irradiation in the pn junction is produced when electrons and holes. In the past years, this two-pin device has become the mainstream optical sensing device.
However, today's market requires more than just a light – electric sensor. It is widely used for in the integration of semiconductor devices around more. The market is craving a more complete solution for optical sensing, not only because it has integrated solution, but also because it offers higher performance and lower system cost.
Example, to examine the cellular phone market. Suppliers are competing to find a relatively personal way reflects. One way is to provide value-added features for cellular phone. At present, we can not only use cell phones to receive voice and data messages, you can also get stock quotes and e-mail. In the near future, we will begin to see such as bar code scanning, optical character recognition (OCR), digital cameras and even health monitoring capabilities and other functions will be some of the standard cell phone functions. Highly integrated optical sensor is making all of these may become a reality.
OCR and business card information to obtain the bar code scanning to use a CMOS linear pixel array to complete, this CMOS device with an integrated ADC and configured to contact the pre-processing circuit imaging device. A CMOS single-chip digital cameras will be used to capture digital images, and high-speed 3G cellular networks in the conditions, these images can be transmitted to family and friends around the world. Monitor pulse and blood oxygen levels can use a photoelectric pulse oximetry to achieve.
When the cellular phone into a true mobile multimedia platform, the high demand will appear to show the growing high-quality data content. Color LCD display will become standard accessories, and in order to monitor the environmental lighting conditions change lighting conditions to provide the best possible images, will need to light sensor. This type of device will not only help provide very enjoyable show results, but also changes in environmental conditions by controlling the display backlight, it will also help manage battery life.
Cellular phone market is dependent on the optical sensor to help to achieve its "third generation" products, at the same time, many other needs of different markets are truly identify color photoelectric sensor. As the digital world is not all the same, nor is it only black and white. Color sensor has two main applications: to judge a particular color; filter unwanted light in order to achieve more efficient sensing applications.
Color Detection Applications include: 1, eliminating dentist for your teeth match the new crown the subjective assumptions.
2, identify the precise your bedroom wall paint color to paint the local shop to provide you with the appropriate product.
3, determined your skin tone to match with your favorite cosmetics.
4, to read the color of industrial process control code.
5, monitor and control the use of red, blue, green produce white light LED.
6, by examining changes in skin color to the early detection of certain diseases.
All of these applications currently can be in the same package or in the same silicon integrated color filter detector and the high cost of sensors are used. Photoelectric sensors are automotive safety and comfort plays an important role. Here are some examples: sun light intensity detected to control the air conditioning, monitoring or detection of carbon monoxide in the room share in airbags to install air bags.
We observed two clear trends emerging: the role of small photoelectric sensors will continue to develop into the mainstream implementation technology; With the demand for higher integration continue to grow, the market will require on-chip optical sensor system.
I am an expert from China Quality Dress, usually analyzes all kind of industries situation, such as used mack truck parts , caterpillar air filter.
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