[ Huaqiang Security Network News ] In the security industry, no matter which New Product is listed, there will be certain purchasing skills. The monitor display is no exception. This article mainly introduces the eight tips for purchasing monitors. You can look at it in detail! 
1. Viewing Angle of the Display <br> Commercial and consumer displays are usually designed for single use directly in front of the display. In most industrial applications, this situation is very rare. For example, a physician or nurse cannot stop and watch the monitor directly during the treatment. They just want to know the expected data. For large machines, it is simply impossible to operate directly in front of the display. For navigation of a ship or aircraft, it is inconvenient for the driver to sit directly in front of the LCD. Especially when there are multiple displays, they face the viewer at different angles.
The monitor display should have a wide viewing angle or be considered as "a glance at the displayed content." Consumer displays generally do not meet this requirement because they use Twisted Nematic, so viewing angles are limited. In order to better adapt to industrial applications, the display is required to have a wide viewing angle, and display technologies (such as ASV or MVA) with a viewing angle of up to 178° have been developed.
2, the brightness of the display <br> Since most flat panel displays are used in indoor environments, the brightness is about 250 ~ 300cd / m2 (Nite), the diagonal size of the 15-inch LCD is the most commonly used, however, This brightness level display cannot be used in an industrial environment because the ambient light is stronger and its brightness easily exceeds the brightness of the LCD backlight. Moreover, touch screens are often used in industrial environments, which also reduces the brightness of the display, making it look darker. In applications such as medical, industrial and public kiosks, the required brightness is at least 450 cd/m2.
3. Response time of display <br> In the past, passive display technology, including LCD, has a very poor response time compared to active light-emitting display technology. In consumer displays, whether it is a notebook display or a desktop display, response time of less than 30ms is sufficient, but in the industrial, medical and gaming fields, users can feel the movement in the dynamic content environment, which requires The LCD should have a faster response time. In newer technologies, technologies such as AVS (Advanced SuperView) or MVA (Multivariate Vert ICal Alignment) have made response times below 10 ms. In TVs using ASV technology, this indicator can reach 6ms.
4, the contrast of the display <br> Unlike the consumer display is mainly used for direct viewing, for industrial-grade displays, the user may not be viewed under the optimal distance or ideal lighting conditions, so the higher contrast display is best choice. For a 10.4 inch, 12.1 inch or 15 inch display used in most industrial applications, a 450:1 contrast ratio is most desirable.
5. Color of the display <br> In some industrial applications, special color information is more important than text or numbers. It is very important to use the measured color as a percentage of the NTSC color saturation. In LCD products, color saturation is completely dependent on the effects of backlighting. CCF (Cold Cathode Reflector) backlighting is a very popular technology and can achieve 70% and 80% of NTSC color saturation.
In some applications, this range is not wide enough, and sometimes the range that needs to be implemented is close to 100% of the NTSC color saturation. This full color saturation is typically achieved with LED backlighting in LCD products.
6, the backlight life of the display <br> Cold cathode fluorescent (CCF) lamp is the most commonly used backlight source in LCD. In industrial applications, CCF backlights typically have a lifetime of at least 50,000 hours, or a half-down of brightness compared to new ones. In many consumer applications, the time required for the backlight to drop to half its initial brightness requires only 10,000 hours.
Since consumer applications do not require the display to continue to work, 10,000 hours of CCF backlight life is sufficient, but not in most industrial and medical applications. The lifetime of the backlight is very low compared to the lifetime of the LCD. Efforts are being made to double the life of backlights, but in most industrial applications, a lifetime of at least 50,000 hours is considered the life standard for CCF backlights.
7. Life of the display <br> For consumers in the industrial market, whether it is used in a telephone booth or a display terminal on an oil rig, it is rare to look for a display that has been guaranteed for 10 years. Manufacturers can provide displays with a life cycle that meets or exceeds 10 years. But most manufacturers of industrial-grade displays will produce at least three years, and in fact, the time to supply the product will last at least five years.
In contrast, consumer-grade displays used in desktop monitors, laptops, or other consumer devices change within a year, sometimes every six months. These displays are mainly to attract consumers with price or appearance, just like a meteor: a flash disappears. But they also have their own position in the market, they are widely used in the consumer field, and the products in this field do not have much requirements for the continuous operation of the display and the compatibility of the form factor.
8. Display configuration control <br> Configuration control means that the display remains compatible in terms of form/applicability/function for a certain period of time. This basically allows display manufacturers the flexibility to change sub-components to keep up with technology or market needs. It also allows users to transition to newer display products with minimal design changes. Product changes are inevitable. The question is how quickly and how much product changes affect users based on time and resources. When implementing configuration control, it is useful to reduce the impact by managing changes.
The design of the monitor display is allowed to change, while the manufacturer strives to keep the changes to a minimum. When they have to make changes to the product, they not only have a sound and recognized Engineering/Product Change Notification (ECN/PCN) plan, but the information is sent to the customer in a timely manner to allow the customer to adapt to the change without seriously affecting them. Business business. Typically, the manufacturer issues a PCN three months before the change is implemented. These changes are then filed and, where appropriate, customers can obtain samples of new products for testing before receiving new products. In consumer displays, there is little demand for configuration control and it is not accepted by the service market. Most consumer displays are basically short-term sales and are subject to change without prior notice.
The monitor display should have a wide viewing angle or be considered as "a glance at the displayed content." Consumer displays generally do not meet this requirement because they use Twisted Nematic, so viewing angles are limited. In order to better adapt to industrial applications, the display is required to have a wide viewing angle, and display technologies (such as ASV or MVA) with a viewing angle of up to 178° have been developed.
2, the brightness of the display <br> Since most flat panel displays are used in indoor environments, the brightness is about 250 ~ 300cd / m2 (Nite), the diagonal size of the 15-inch LCD is the most commonly used, however, This brightness level display cannot be used in an industrial environment because the ambient light is stronger and its brightness easily exceeds the brightness of the LCD backlight. Moreover, touch screens are often used in industrial environments, which also reduces the brightness of the display, making it look darker. In applications such as medical, industrial and public kiosks, the required brightness is at least 450 cd/m2.
3. Response time of display <br> In the past, passive display technology, including LCD, has a very poor response time compared to active light-emitting display technology. In consumer displays, whether it is a notebook display or a desktop display, response time of less than 30ms is sufficient, but in the industrial, medical and gaming fields, users can feel the movement in the dynamic content environment, which requires The LCD should have a faster response time. In newer technologies, technologies such as AVS (Advanced SuperView) or MVA (Multivariate Vert ICal Alignment) have made response times below 10 ms. In TVs using ASV technology, this indicator can reach 6ms.
4, the contrast of the display <br> Unlike the consumer display is mainly used for direct viewing, for industrial-grade displays, the user may not be viewed under the optimal distance or ideal lighting conditions, so the higher contrast display is best choice. For a 10.4 inch, 12.1 inch or 15 inch display used in most industrial applications, a 450:1 contrast ratio is most desirable.
5. Color of the display <br> In some industrial applications, special color information is more important than text or numbers. It is very important to use the measured color as a percentage of the NTSC color saturation. In LCD products, color saturation is completely dependent on the effects of backlighting. CCF (Cold Cathode Reflector) backlighting is a very popular technology and can achieve 70% and 80% of NTSC color saturation.
In some applications, this range is not wide enough, and sometimes the range that needs to be implemented is close to 100% of the NTSC color saturation. This full color saturation is typically achieved with LED backlighting in LCD products.
6, the backlight life of the display <br> Cold cathode fluorescent (CCF) lamp is the most commonly used backlight source in LCD. In industrial applications, CCF backlights typically have a lifetime of at least 50,000 hours, or a half-down of brightness compared to new ones. In many consumer applications, the time required for the backlight to drop to half its initial brightness requires only 10,000 hours.
Since consumer applications do not require the display to continue to work, 10,000 hours of CCF backlight life is sufficient, but not in most industrial and medical applications. The lifetime of the backlight is very low compared to the lifetime of the LCD. Efforts are being made to double the life of backlights, but in most industrial applications, a lifetime of at least 50,000 hours is considered the life standard for CCF backlights.
7. Life of the display <br> For consumers in the industrial market, whether it is used in a telephone booth or a display terminal on an oil rig, it is rare to look for a display that has been guaranteed for 10 years. Manufacturers can provide displays with a life cycle that meets or exceeds 10 years. But most manufacturers of industrial-grade displays will produce at least three years, and in fact, the time to supply the product will last at least five years.
In contrast, consumer-grade displays used in desktop monitors, laptops, or other consumer devices change within a year, sometimes every six months. These displays are mainly to attract consumers with price or appearance, just like a meteor: a flash disappears. But they also have their own position in the market, they are widely used in the consumer field, and the products in this field do not have much requirements for the continuous operation of the display and the compatibility of the form factor.
8. Display configuration control <br> Configuration control means that the display remains compatible in terms of form/applicability/function for a certain period of time. This basically allows display manufacturers the flexibility to change sub-components to keep up with technology or market needs. It also allows users to transition to newer display products with minimal design changes. Product changes are inevitable. The question is how quickly and how much product changes affect users based on time and resources. When implementing configuration control, it is useful to reduce the impact by managing changes.
The design of the monitor display is allowed to change, while the manufacturer strives to keep the changes to a minimum. When they have to make changes to the product, they not only have a sound and recognized Engineering/Product Change Notification (ECN/PCN) plan, but the information is sent to the customer in a timely manner to allow the customer to adapt to the change without seriously affecting them. Business business. Typically, the manufacturer issues a PCN three months before the change is implemented. These changes are then filed and, where appropriate, customers can obtain samples of new products for testing before receiving new products. In consumer displays, there is little demand for configuration control and it is not accepted by the service market. Most consumer displays are basically short-term sales and are subject to change without prior notice.
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