Tuesday, March 5, 2024

Versatile Displays For PCB Mounting

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With the EA DOG series, DISPLAY VISIONS has a range of flat, modern COG displays with an integrated driver. Modest power consumption and usable in 3.3 V systems, they are particularly suitable as displays in handheld devices.

The compact text and graphic LCDs are less than 3 mm thick. Designed as chip-on- glass displays, the controller is already integrated into these displays. The text displays come with built-in character sets. These high-contrast displays can be soldered directly onto the PCB. They run with 3.3 V without auxiliary voltage and the current consumption is between 150 and 900 µA depending on the model and size. They are controlled using a 3 or 4-wire SPI, or, for some models, even using a 2-wire I²C or 4 or 8-bit data bus.

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The text and graphic displays are currently available in 13 different sizes, from 55×31
mm to 94×67 mm. This includes 6 text displays with one to four lines and 7 graphic displays with resolutions between 102×64 pixels to 240×128 pixels. There are five high-contrast LCDs to choose from: reflective and transmissive STN, STN with blue background and black/white positive and negative FSTN. The contrast voltage can be set by command. Graphic displays can also be rotated 180° for mechanical reasons or to make them easier to read, for example for installation in the front of a laboratory power supply unit. The EA DOG displays can also be combined with a touch screen.

For the backlight, the user has a choice of 6 colours. White, yellow/green, blue, amber, red and full-colour RGB. Simply place the backlight behind the display and solder it into the PCB with the display. No additional fastening is required. Operation of backlight is either via an external series resistor or an LED driver. Meaningful operation is possible from 3 mA.

All panel variants are available from just one piece. DISPLAY VISIONS GmbH guarantees long-term availability of up to 10 years. This also ensures replenishment for product lines designed to be long term.

A free simulator is available to download on the manufacturer’s website. It allows you to simulate all display versions and colours on your Windows PC before buying. A USB test board is also available for an easy start with a real display. This allows your own text to be shown on the connected display straight away. DISPLAY VISIONS also supports the developers with comprehensive support and extensive C and micro-controller code.


 

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