Viewing angle around 160°-170° and an excellent contrast say in favor of character displays with OLED technology.
OLED technology (Organic LED) slowly but surely finds its place even in industrial devices. After a big success at mobile phones, where they convince by high contrast and an excellent viewing angle, this technology becomes price-affordable and technologically advanced even for industrial applications.Benefits in short:
- OLED means, that every pixel is principally one „planar“ LED, thus each pixel emits light (white, RGB or some color). That means, that OLED doesn´t have / doesn´t need backlight and it also helps to a high contrast, as there´s no problem with a light bleeding through “off” (black) pixels, as it is often at LCD displays. High contrast also ensures excellent legibility even at a strong daylight.
- wide viewing angle. As every pixel (point) is itself a light source, it shines in all directions (half-globe) and it provides an extreme viewing angle near to a theoretical maximum of 180°
- extremely wide operating temperatures range, frost doesn´t “slow down” display response time
- the same color from every viewing angle. This is vital at color (RGB) OLED displays and it means almost zero color shift at viewing from various viewing angles, so well-known from TFT LCD displays
- low power consumption, partially dependent on a display content (number of switched-on pixels and their intensity)
New character displays from company Winstar belong to advanced displays with declared features. In our stock can be found types for example WEH001602ABPP5N00000 (16×2, blue), WEH001602AWPP5N00000 (16×2, white), WEH002002ALPP5N00001 (20×2, yellow/orange – „amber“) and WEH002004ALPP5N00000 (20×4, yellow/orange – „amber“) and other. They all have 8-bit parallel interface „6800“ and a modern controller WS0010. Direct comparison of OLED display with an FSTN LCD is best illustrated in the attached video.
OLED displays can be read even “from a side” - [Link]
Jared Sanson @ jared.geek.nz writes:
So it’s been a while since I last posted about my OLED watch, and I’ve done a lot of work on it! (And also broke it multiple times)
It’s taken me a lot of work to get this far, and I developed EVERYTHING from the ground up. The electronics design, the PCB layout, the RTOS and firmware drivers, the graphics engine, the user-mode app code, and even USB communications apps. I’ve used C, C#, and Python extensively in this project, and Altium Designer for the schematic and PCB.
Overall it has been an awesome learning experience, and if I was to make another one I would do a lot of things differently!
OLED Watch Is Alive! - [Link]
3,5″ display with the processor Diablo16 from company 4D Systems can handle even applications, where processor Picaso is not sufficient.
So as to make it right – it´s still true, that processor Picaso is a relatively very powerful graphic processor able to manage demanding applications with graphics, animations, sound, video,… Naturally, like each processor, there are applications where its power is sufficient with a reserve and for someone already not. If you suppose, that processor Picaso wouldn´t suit to you by its features, or at least it wouldn´t enable eventual further enhancing of functionality, then the Diablo16 processor will meet even high requirements.
In behalf of processor Diablo16 says not only the computing power itself, but also the other functionality as a memory size, communication interfaces, analog inputs, GPIO and other. Until now, the power of Diablo 16 could be used in two ways – in the uLCD-70DT module (7“, 800×480), or in your own design using the processor itself. Now, company 4D Systems comes also with a 3,5“ module (480*320px) uLCD-35DT, „driven” by this powerful processor.
Another good news is availability of a new CMOS VGA camera module – uCAM-II with a serial output (UART TTL). As a standard, the camera is equipped with an optics with a 56° viewing angle. Also available is the exchangeable optics, with a 76° and 116° viewing angle.
Similarly like at all 4D Systems modules with Picaso and Diablo16 processors, also in case of uLCD-35DT module can be used for development of application a powerful software package – Workshop4 IDE.
Try the hell power boxed up in 3,5″ - [Link]
Raspberry Pi PiTFT Weather Station:
More tinkering with the wonderful Adafruit 2.8″ Touchscreen TFT module (PiTFT) for the Raspberry Pi. This time a weather station drawing data from weather.com.
Luckily there’s a wonderful python module to extract data from three popular weather services; python-weather-api supports NOAA, Yahoo! Weather and weather.com. This makes life so much easier.
Download the module and install in the usual way; there are instructions in their wiki.
A simple way to display the raw data in a more readable form is to use Pretty Print (pprint) which is installed by default on Respbian. Just change the code in the call to weather.com in the script below to your town which can be found in the URL if you use the weather.com web page….
PiTFT Weather Station - [Link]
Arthur Guy made this mini LCD backpack for the smaller display screens:
This is an LCD backpack but it is for the smaller displays with the double row of pins rather than the single line.
I made this adapter as I was working with some small displays and needed a simple way of connecting it to a microcontroller. There are plenty of adapters for the standard single row displays but I couldn’t find any for the smaller dual row displays
This adapter works with existing libraries built around the PCF8754 shift register
Mini LCD Adapter Backpack - [Link]
praveen @ circuitstoday.com writes:
LCD modules form a very important part in many arduino based embedded system designs. So the knowledge on interfacing LCD to arduino is very essential in designing embedded systems. This article is about interfacing a 16×2 LCD to Arduino. JHD162A is the LCD module used here. JHD162A is a 16×2 LCD module based on the HD44780 driver from Hitachi. The JHD162A has 16 pins and can be operated in 4-bit mode or 8-bit mode. Here we are using the LCD module in 4-bit mode. First, I will show you how to display plain text messages on the LCD module using arduino and then few useful projects using LCD and arduino. Before going in to the details of the project, let’s have a look at the JHD162A LCD module.
Interfacing LCD to Arduino uno - [Link]
During SOS webinar with 4D Systems you could find out how graphic processor Diablo 16 can make our work easier and shorten time necessary for the development.
Get to know the performance and user-friendly graphic processor Diablo 16 - [Link]
Hemal Chevli wrote an article detailing his new tool the GLCDTerm that reads serial data without PC on GLCD:
I’m calling it GLCDTerm(spin-off from GTKTerm), this handy tool reads TTL serial data and displays it on GLCD. This is the first time I’ve used a GLCD in any of my projects. It runs on m328 using arduino bootloaer and the awesome GLCD library. I first made a prototype on one of my arduino clones, Below is the video running diagnostics program.
Read serial data without PC on GLCD – [Link]
Displays called as “Electronic ink” or “e-Paper” are a real electronic form of a paper.
For those of you, who are not familiar with this type of displays yet, we´l mention, that it´s a so called electrophoretic display, i.e. Display containing white particles in microcapsules dispersed in a thin layer of a dark high-viscosity liquid. These particles can be moved or turned by a short voltage impulse, what will cause a given pixel to appear as white. Similarly an impulse of a reverse polarity will cause a given pixel to appear as black or it can also be grey (usually 4 shades of grey). High viscosity of a liquid causes that microparticles remain their position practically forever (years). That means, that this type of displays only need an electric energy to change a displayed content (!). In other words it´s an ideal display for battery powered devices. From some point of view is the behavior of ePaper display similar to bistable (latching) relays. A display is reflexive, i.e. doesn´t require backlight but for a good legibility at least a low ambient light is necessary. It´s advantageous that the display is easily readable even on a direct sunlight. A charm of ePaper display is also in the fact, that a displayed content is really similar to that sketched/ written on a paper. The first type of ePaper displays in our offer is a 2“ (172*72 px) display from company Electronic Assembly EAEPA20-A. The module is only 1.18mm thin and it only needs a few additional components for its operation. Power supply is single – 3,3V (no other voltages are required) and the display contains a standard controller SSD1606 with a 4-wire SPI interface.
Detailed information will provide you the EA_ePaper datasheet. Upon request, company Electronic Assembly is able to produce any ePaper display up to 300×300 mm size (MOQ 1000 pcs).
Display displaying without a power supply is available even for you - [Link]
Maybe the most well designed reflow oven controller out there @ andybrown.me.uk:
It’s been so long since I had the idea for this project that I can’t remember why I had the idea in the first place. At least I blame it on the passage of time although this engineer is getting on a bit now so it could easily be memory rot on my part. So here we are then, a reflow oven controller. Let’s quickly recap what a reflow oven is for those that are new around here.
The two main processes used in industry to build printed circuit boards are wave soldering and reflow using a very large industrial oven that you probably can’t afford and if you could afford to buy it you probably couldn’t afford to house or run it.
An open-source Cortex-M0 halogen reflow oven controller with TFT LCD - [Link]