Displays and screens

Seven-segment Display - simple, practical and timeless

7-segment displays are a very common type of display that appear e.g. on calculators and watches with a digital display: characters. These are usually numbers, although some letters are used for the hexadecimal display. The characters are written by switching segments, numbering seven, on or off. When all 7 segments are switched on, the number 8 appears. An additional element of such a display may be a dot in the lower right-hand corner of the display, which makes it easier to recognize the digits 6 and 9. Display segments are LEDs that connect to the cathode or anode system. The control of displays working in a common cathode system is enabled by the 4511 system in CMOS technology. On the other hand, the 7447 system produced in TTL technology can control displays connected in a common anode. The segmented displays are timeless in their simplicity. They are perfect for small numerical display devices such as thermometer, alarm clock or watch. In our Botland shop we have prepared many types of segment displays, which can be easily adapted to the design of devices.

Led matrices - perfect combination of functional and visual qualities

As we have explained with the 7-segment display, LEDs (Lighting Emitting Diodes) are a convenient way to display simple information. The LED matrix is a particular arrangement of a set of LEDs to form a table where each LED can be illuminated independently. The LEDs are arranged in rows and columns. As with the 7-segment display, there are two types of matrix: common anode array and common cathode matrix. The LED screen is an improved LCD technology, which differs in the type of backlighting. As it has been said, t is illuminated by LEDs, so called edge light or direct method (backlit, backlight), with white light and tricolour light. In the case of the edge method, the LEDs are positioned on the edge of the matrix and directed to the entire screen surface. A more expensive type of matrix is in the case of the direct method, where the diodes are also placed on the entire backlight surface of the matrix. This gives a much better contrast and a deeper colour of black. Check which LED matrices we offer in the Botland shop.

LCD displays - Convenient reading of information on the control panel

The LCD matrix is a liquid crystal screen and consists of two layers of liquid crystals, which are located between the surface of the screen. The liquid crystal works by arranging light rays or blocking it. The LCD screen is made up of pixels, which consists of 3 sub-pixels in three colours: blue, red and green. The LCD monitor uses CCFL (Cold Cathode Fluorescent Lamp), a cold cathode lamp that has very bright white light and low power consumption. These lamps are usually placed on the sides of the monitor, but in the case of larger panels they can also be placed in the middle of the screen. For all beginners in learning embedded systems, we recommend 2x16 character LCD displays, which are equipped with an HD44780 chip. It also has a computable introduction with Arduino platform. You can find for it for free in the network LiquidCrystal library, which is dedicated to LCD displays. Check our offer to find a display that meets your expectations!