The brighter the environment, the more difficult it is for LCD to transmit, because the standard readable brightness of human is 250 ~ 300 CD/㎡. Some LCD manufacturers are trying to extend the range to more than 450cd/㎡. But these monitors need more energy, which is not the best solution. Moreover, these brightness levels are not enough to work in very bright environments.
At present, many domestic manufacturers have highlighted LCDs above 1800cd/㎡, among which many military LCDs of Baoyi Science and Technology are above 2000cd/㎡.
In a typical industrial environment, the operator prefers to watch the display at an oblique angle rather than a positive angle.
Therefore, it is very important that a picture is not distorted or discolored when viewed from different angles (up, down, left, right and left). Especially in consumer applications, the display settings are not good, because the picture may be gone or can't be seen clearly at an angle.
Some techniques are used to improve the viewing effect of LCD at oblique angle. Some film-based technologies usually reach viewing angles of 80 above, 60 below, 80 left and 80 right. These angles are sufficient for many applications, but some applications may require a larger viewing angle.
* * * Plane conversion technology (IPS), multi-quadrant vertical alignment technology (MVA) and ultra-precision thin film transistor technology (SFT) provide a popular choice for various LCD manufacturers. These patented technologies can achieve a larger perspective than the field of film technology.
For example, SFT's NECLCD technology has achieved 85. The viewing angle enables the mechanical operator to view the LCD from almost all angles without great image distortion or color change. Size and resolution also play a role in overall readability. Generally speaking, the 6.5, 8.4, 10.4, 12. 1 and 15-inch LCDs in liquid crystal mode are mostly used in industrial applications. These dimensions provide enough space for viewing data, signal waveforms or other graphic data without occupying too much space on the equipment.
The requirement for resolution mainly depends on the displayed information or data. In the past, VGA, SVGA and XGA resolutions were the most popular resolutions.
However, more and more manufacturers are beginning to pay attention to the profits of large aspect ratio displays, such as WVGA and WXGA. Large vertical and horizontal modes allow users to watch longer information waveforms and more data on one display. These displays can also be designed to integrate the functions of touch keys on the display surface, so that users can view data on large vertical and horizontal displays, or switch between standard aspect ratio displays with integrated touch screen functions. This new advanced function is very helpful to simplify the user interface. The ability to resist temperature change and vibration is an important consideration in choosing contemporary industrial displays. The display must be flexible enough to prevent mechanical operators or peripheral devices from colliding or colliding, and it must be able to cope with various working temperatures. Compared with CRT, LCD is more resistant to temperature change, collision and vibration.
Storage and operating temperatures are also the main variables in selecting industrial equipment displays. Generally speaking, the display is embedded in a closed container and is a part of large equipment. In these cases, the temperature will be affected by the heat generated by closed containers and peripheral equipment.
Therefore, when selecting a monitor, it is very important to keep in mind the requirements of actual storage and working temperature. Although some measures have been taken to dissipate the generated heat, such as using fans in closed containers, choosing the most suitable display for these environments is the most effective way to ensure that the storage and working temperature requirements are met. The improvement of liquid crystal materials also makes it possible to expand the optimal temperature range of LCD. At present, many liquid crystals have achieved the temperature range of-10 ~ 70℃. When selecting a display for manufacturing in a production environment, other relatively hidden features need to be considered. For example, it is important to ensure that downtime is minimized. In order to achieve maximum utilization, it is very important to choose the highest quality monitor and prepare spare parts for on-site maintenance instead of sending them outside for maintenance.
Industrial application displays also need a long product life cycle. When the manufacturer no longer makes a certain model, the new monitor should be backwards compatibility to meet the existing closed container, without redesigning the whole system.