Stability Medical Gray-scale displays are more expensive than regular displays. We want to have a service life of more than 5 years. Whether it's a CRT monitor or an LCD monitor, the brightness attenuates over time. The general display life is defined as 50% of the time when the brightness attenuates to the maximum brightness. In the case of an LCD monitor, this time is approximately 30,000 hour to 50,000 hours, and the brightness is not the same every day, even during service life. So after a period of time (about three months to six months), the monitor must do the brightness and grayscale correction to ensure the consistency of the display. If the number of monitors is large, the workload is also considerable. The more advanced display has sensors inside to detect changes in the brightness of the display and automatically adjust. Enables the display to maintain a stable brightness at all times during its service life. The brightness of the LCD monitor is not very stable. Its brightness changes depending on the temperature. Some monitors have sensors inside to detect changes in the brightness of the display and adjust automatically.
In this way, you can save a lot of manpower. In addition, when the liquid crystal display is just opened, the brightness will not immediately reach the set brightness. The set brightness will not be reached until about 20 – 30 minutes later. In this brightness does not reach the set Peugeot time, the display is not suitable for cooperative diagnosis. Users often stop using the monitor for other transactions, and after a period of time, screen protection starts to start. The monitor is powered off. This is good for extending the display to be ordered. However, when the user starts to use the monitor again, the monitor is in the first boot state, and must wait for the 20–30 minute temperature machine timing. As a result, it is quite inconvenient to use. Turn off screen protection and reduce service life. Therefore, fish and bear paws, can not be reed. A well-designed display that uses built-in sensors to detect brightness at boot time. If the brightness is not up to standard, increase the power supply voltage, so that the display in 30 seconds to achieve the preset brightness.
As a result, you can not wait for the thermostat time, but also in the idle machine to start screen protection, extend the life of the display.
Consistency If separated for a period of time, the same image will still display the same quality, as if looking at the same film. Wholeness refers to the same image displayed on workstations in different locations in the hospital. Its brightness, grayscale, contrast and so on are exactly the same, so that doctors in different locations see the same image; When the printed image is the same as the image displayed on the monitor. This way, no matter what kind of media on the image is also the same. Originally the hospital in the use of film diagnosis, QA (Quality Assurance Quality assurance) is placed on the washing machine. The radiology department checks the washing speed, potion concentration and temperature of the washing machine every day. Make sure that the quality of each film washed out is the same. After the implementation of the PACS system in the hospital, QA (Quality Assurance Quality assurance) is placed on the monitor. The number of monitors will be no shortage. How to buy the display in different brands, different usage rates, different times, to ensure the integrity of the image, maintain in the same brightness, the same display function has become an important subject. So when choosing a monitor, in addition to the points mentioned above, can the display manufacturer provide display QA (Quality Assurance quality Assurance) and PM (Preventive maintenance & planned The tools of maintenance preventive maintenance) and whether the display has QA function is also an important factor to be considered.
