“LCD” stands for “Liquid Crystal Display,” which refers to a liquid crystal display, while “LCM” stands for “Liquid Crystal Module,” which represents a liquid crystal module. LCM solutions consist of an LCD display and other components such as backlighting, converter matrix, driver, etc.

Mono LCM LCD solutions are excellent for conveying short messages. Unisystem offers over 200 models of LCM displays. In addition to standard formats, square and round solutions are also available.

They can be divided into two groups:

  • Graphical mono LCM displays, which allow the presentation of various content, including graphics. Their size is determined by specifying the resolution (number of pixels vertically and horizontally).
  • Numeric mono LCM displays, which enable the presentation of individual characters such as letters or digits. Their size is determined by specifying the number of characters and rows. For example, in solutions with eight characters and two rows, a total of 16 characters can be displayed.

Monochromatic LCM displays have many advantages that make them an ideal solution for applications in industries such as industrial automation. First and foremost, they are resistant to shocks and vibrations and can operate for many years without failure. Mono LCM displays are also energy-efficient, making them suitable for battery-powered devices such as portable measuring instruments. Moreover, monochromatic LCM displays are cost-effective solutions, characterized by low production and operating costs in the end device.

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How to choose the right monochromatic LCM display from our offer?

When choosing a monochromatic LCM display, it is important to consider several parameters such as data presentation method, available content and background colors, viewing direction, matrix type, polarizer type, and operating temperature. Each variant of an LCM LCD display has unique features that can be tailored to specific application needs.

Content and background colors on monochromatic LCM displays

Monochromatic LCM displays can present content and backgrounds in multiple colors. In addition to black or white, options such as yellow-green, red, or blue are also available. Excellent content readability is achieved with a high contrast between the content and background. For example, displaying light-colored content on a dark background or dark-colored content on a light or blue background are common choices.

Viewing direction of monochromatic LCM displays

Monochromatic LCM displays have limited viewing angles, typically at 12:00 or 6:00. The choice of viewing direction should be based on how the end device will be used, considering whether the content will be viewed from the top (12:00) or from the bottom (6:00).

Type of monochromatic LCM module

There are two main structural types of monochromatic LCM displays: COB (Chip-on-Board) and COG (Chip-on-Glass). COB modules have the controller placed on a printed circuit board (PCB), while COG modules have the controller directly mounted on the glass of the display. COG solutions have smaller overall dimensions, making them suitable for applications that require compact designs.

Matrix types in monochromatic LCM displays

The available monochromatic LCM displays use three types of passive LCD matrices:

  • STN (Super-Twisted Nematic),
  • FSTN (Film Compensated Super-Twisted Nematic),
  • FFSTN (Double Film Compensated Super-Twisted Nematic).

FSTN and FFSTN variants are enhancements of STN displays, incorporating additional compensatory filters between the STN matrix and the rear polarizer (one in FSTN and two in FFSTN). These filters improve contrast and image quality.
Each type of monochromatic LCM display matrix can be available in positive or negative variants.

Type of polarizer in monochromatic LCM displays

The polarizer is a thin film layer that allows the transmission of only one plane of polarized light. The choice of polarizer depends on the backlight structure. There are three main types of backlighting in LCD displays:

  • Reflective displays utilize ambient light to illuminate the content, often employing mirrors to reflect the light. These displays are commonly used in calculators.
  • Transmissive displays use a backlight to illuminate the content.
  • Transflective displays combine both reflective and transmissive technologies, using mirrors and a backlight.

Controllers in monochromatic LCM displays

Controllers are integrated circuits that drive the pixels in monochromatic LCD displays. The choice of the appropriate controller is important as it affects performance, speed, and

Operating temperature of monochromatic LCM displays

The operating temperature range for monochromatic LCM displays is typically specified from -20 to 70°C, allowing for indoor and outdoor applications in many cases.

Temperature compensation circuit

In certain applications such as transportation, medical devices, or military equipment, where the electronics are exposed to rapid temperature changes, temperature compensation circuits are important. These circuits help correct any undesired effects caused by temperature fluctuations.

Built-in negative voltage generator

Monochromatic LCM displays with a built-in negative voltage generator can generate the necessary negative voltage for proper contrast adjustment.
By considering these parameters, you can select the appropriate monochromatic LCM display from our diverse range of options, ensuring it meets the requirements of your specific application.

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