Questions tagged [oled]

An OLED (organic light-emitting diode) contains a film of organic material that emits light when current is applied. They may be used to create digital displays that do not require a backlight giving a deeper black level and higher contrast than LCD displays.

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31
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5answers
12k views

How do devices like the Game Boy Advance achieve their frame rate?

I've been designing my own handheld gaming device based around an AVR microcontroller and a small OLED display. I started off with a monochrome display 128x64 pixels and can comfortably draw to it at ...
21
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1answer
138k views

Differences between OLED, LED, LCD, and TFT Screens

I have heard about these different types of screens on DIY websites and in consumer electronics. What are the differences in these types of screens and what are their advantages and disadvantages?
12
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2answers
3k views

Why are OLEDs used in screens insted of LEDs?

I was trying to google this question and couldn't find any information. And from reading some info on how they work i didn't find any significant difference asides from OLEDs being made out of organic ...
11
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3answers
8k views

Implementing a very high frame rate (~1Khz) OLED display

I'm interested in developing a very high frame rate OLED display capable of displaying ~1000fps with a resolution of around 1200x800 or so. This obviously has some pretty severe bandwidth requirements,...
8
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1answer
899 views

How is an LED constructed, is it possible to build my own

I wondering if it would be theoretically possible for me to build my own led or oled. I am aware that this is not very practical, I'm more interested just as an exercise. I understand the basic theory ...
5
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4answers
7k views

Which interface is better for my OLED display?

I have a 0.96 inch 128x64 Yellow-Blue OLED display module like this: OLED module and I want to use it for a project. The Driver of it is SSD1306. if you see in the datasheet of SSD1306, you will know ...
5
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1answer
648 views

extremely high frame rate oled

What's the maximum dotclk frequency for a typical OLED display with serial input? I've looked through some driver specs, example: SEPS525 but its not clear to me. I'm looking to update a small ...
4
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4answers
15k views

SSD1306 Display SPI Connection or I2C (According to resistors)

I bought one of those cheap 0.96" OLED Displays from china, ebay. In the product description it states that it's a I2C Display, Ebay Link. I want to use it with an ATmega8. I connected it accordingly ...
4
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2answers
4k views

How large is “one pixel” for S5 AMOLED display?

Referring to Samsung Galaxy S5 OLED Pixel structure in oled-display.net, in particular this image illustrates the S5 AMOLED pixels: To my understanding, the yellow rectangle should represent "one ...
4
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2answers
2k views

How is this OLED cable being soldered to PCB?

In this video, from around 4:18 onwards, you see the cable of an OLED display being soldered. How is this soldering happening; i.e., how does the solder "flow" to the PCB pads given that the contacts ...
4
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2answers
165 views

When an LED has a “light degredation” specification, does that means it's an OLED?

I was reading a datasheet for an LED panel, and I saw a spec for "Light Degradation" after 1000 hours. Can I assume this means it's an OLED (Organic LED), and that the organic materials will decay ...
3
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1answer
329 views

Why are there no discrete OLEDs?

Why does nobody make a discrete OLED in an SMT or thru-hole package, like we have with LEDs? Is it a cost thing or a limitation of the process?
3
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3answers
5k views

jpeg images in STM32 internal flash

I'm using both STM32F103 and STM32F407 with a SEPS525 SPI driven OLED display (160x128). I want to store images to display in internal flash, but BMP uncompressed images with 16bit colors are huge (...
3
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2answers
1k views

Applescript to Arduino LCD only works with Serial Monitor

I spent all day trying to figure this out and finally got somewhere that atleast lets me know that I am doing something weird... I am trying to send data to my LCD Screen on my Arduino Uno, but for ...
3
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1answer
438 views

Do high+variable refresh rate (small) displays exist (i.e. of type OLED)?

Here's my conundrum - I'd like a portable display that can be driven at both variable and high refresh rates > 80 Hz (for some visual perception experiments). Does anyone know if this tech exists / if ...
3
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1answer
196 views

How to power a OLED 128x128 display from 3.3v microcontroller board?

I recently purchased a small 1 inch OLED screen. In the datasheet, it shows the max power requirements as: Operation: 3.5v Logic: 2.6v IO: 3.5v Display: 13.5v I figure I can directly connect the ...
3
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0answers
427 views

OLED display using dspic33f i2c

I am trying to use OLED display in a dspic33f microchip. I've successfully initialized and sent data using I2C to OLED. I managed to display a small font(8pt) on the OLED. However, when I tried a ...
3
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0answers
701 views

Large to medium size e-Ink Display for prototyping [closed]

I have been doing research in finding various raw screens for prototyping, stuff like e-ink, color e-ink and OLED screens. Then I saw this earlier post: Gumstix with an e-ink screen So after one ...
2
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2answers
179 views

OLED is garbled when powered by 3.7 battery but not when powered by USB or variable regulated power source?

I have an esp8266 on a breakout board for programming hooked up to an OLED via GPIO 0 and 2. It works fine if I power it via the FTDI/USB. It also works when I power it at 2.8-3.0V using a desktop ...
2
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3answers
5k views

Flip the image of OLED 128x64 0.96 inch display

I am looking for a method to flip the image of an OLED 128x64 0.96 inch (with SSD1306 driver) display. It is the one I have with 4 pins only (image found on Internet): What I want to do is: Are ...
2
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1answer
79 views

How are displays updated? [closed]

If you would excuse the infiltration by a curious computer scientist with very little knowledge of hardware, I would like to understand better how modern displays are updated. I don't care about HDMI ...
2
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1answer
776 views

How are OLED screens driven?

How are OLED screens such as the ones on my cell phone, driven? From my understanding, an OLED screen is basically a matrix of tri-coloured LEDs. LEDs can be dimmed by using PWM. So does that mean ...
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3answers
352 views

9V from two AAA batteries plus charge pump: batteries in series or parallel?

I am driving an OLED display via two AAA batteries plus a charge pump to step up the voltage to 9V. I was wondering if there is likely to be any significant difference in efficiency between (a) using ...
1
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3answers
879 views

Convert 3.3v to 14v?

I want to use a 4D Systems OLED display with an ATmega32u4 based PCB. I'm still working on designing the PCB and have hit a problem. In the data sheet it says that one of the power supply pins for the ...
1
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3answers
6k views

OLED 128 x 32 SSD1306 display problem (picture inside)

I bought one of these cheap 0.91" OLED displays and hooked it up according to a datasheet that was sent to me by the seller. I tried several drivers for it after I thought there are compatibility ...
1
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2answers
331 views

Is this 20x2 character display broken?

Recently I've got my hands on several 20x2 character displays which don't seem to work. This is what they look like: Apparently, they are HD44780-compatible. The three 16-pin connectors (single-row ...
1
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3answers
10k views

How to make this I2C OLED screen work? (probably SH1106)

I have just received this screen: link but unfortunately it's different then other showed in reviews. That's my version link It's probably based on SH1106 but I can't make it work. I have tried few ...
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1answer
22 views

How to connect a Sparkfun LiPoly Charger to an Arduino Nano?

I was able to upload the Adafruit SSD 1306 OLED Library to an OLED Display using an Arduino Nano. Now I want to power the Arduino Nano via a Lipo Battery but the battery must be rechargeable and I ...
1
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1answer
114 views

What could cause 45FPS limit for SSD1306?

I'm porting U8G2 display library to ESP32 microcontroller (no suitable tag) with ESP-IDF (its official platform) as the platform, I2C protocol for now, using SSD1306 display for testing. After all ...
1
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1answer
87 views

Send a single pulse low/high pulse then stay high

I have a small OLED display that I'd like to drive with an ATtiny85 micro controller. The OLED is the 4 wire SPI type, with no CS. It has a Reset pin that is required to be pulsed low-high at power on ...
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3answers
381 views

SSD1306 I2C: Draw only changes works however on wrong position, how to set position (command)?

I create an OLED display class for the SSD1306 and how it works is pretty straight forward. The display is buffered (offscreen method) and at performing an update, it 'dumps' the buffer to the display ...
1
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1answer
288 views

Interfacing OLED 0.95'' 96*64 with ATMEL SAMD20 Series MCU

I am trying to interface my OLED 0.95'' 96*64 with my SAM D20 using SPI interface. I am fairly new to interfacing, so I'm finding it difficult interfacing the part. Question: 1) When I provide the ...
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1answer
5k views

Adafruit SSD1306, I2C, ATmega1284p: OLED Display askew/misaligned

Another strange problem here. The setup: Adafruit SSD1306 OLED board connected to an ATMega1284p via I2C. Since I "upped" my 1284 to 8MHz (which I needed to to reliably talk to my temperature ...
1
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0answers
31 views

Display Design - would combining OLED with a white source be more efficient?

To be clear, I'm not an electrical engineer, nor do I claim complete knowledge of how displays work. However, I have done research into displays (televisions, computer monitors, AMOLED phone screens)...
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2answers
315 views

ssd1306 registers

I got confusion while reading datasheet of the OLED display(128x64).I do not understand why to use two column start registers. https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
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2answers
697 views

Horizontal offset with generic SSD1306 OLED display

I bought a generic OLED 128x64 display on ebay and had some success in getting it running with the Adafruit SSD1306 library. I ported the initialization function to C and am driving the LCD using the ...
1
vote
3answers
599 views

Looking for LCD replacement (OLED)

I'm considering replacing this 16x2 LCD module found in an early '90s E-Mu synthesizer with a modern OLED equivalent. However, apart from the Solomon name I can't find any reference to any of the ...
1
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0answers
86 views

16x2 Charater display for outdoor use

I currently have a project installed in an outdoor location. It currently uses a 16x2 blue OLED display for simple messages to the user. Over the past 4 years I have had to replace the display ...
1
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1answer
269 views

What is the current development status of Transparent OLEDs? [closed]

As far as I can see there are some working prototypes, but has this technology reached the market in a stable way? Does anybody know what's the current status of the TOLED technology? Also do you ...
1
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0answers
964 views

OLED Custom Character not being displayed correctly on Arduino Uno? Too Many?

So I have a bunch of custom characters and they are created like this ...
1
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2answers
467 views

SSD1306 128x32 Connector

What's the name of connector which can be used here? I know that I can always solder it to PCB, but I was looking for more "elegant" solution, and I remember seeing these connectors before on PCB's ...
0
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3answers
1k views

OLED 5V-tolerant SCL and SDA

Looking online for small SSD1306 OLED screens to use with Arduino over I2C, I find products that look like this: The sellers don't offer datasheets - and the product descriptions don't say anything ...
0
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1answer
292 views

Playing around with I2C does not yield expected results for SSD1306-OLED

I'm trying to use an OLED-screen with I2C, but nothing happens (literally) so I come here to see if anyone can shed some lights on what I've done wrong. My first approach was to write a software I2C-...
0
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2answers
622 views

Why does the ssd1306 OLED controller have an unusual memory layout?

I've recently ported a driver for the ssd1306 OLED controller. https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf http://www.ebay.co.uk/itm/0-96-inch-128x64-I2C-Interface-White-Color-OLED-Display-...
0
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2answers
275 views

How to display voltage on OLED? [closed]

The basic idea is to make an OLED voltage meter. I idealy want to use as little parts as possible. If my understanding is correct I would need a voltage sensing circuit which would give feedback to a ...
0
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2answers
700 views

Is using a display panel as a light sensor conceivable?

Though the question may sound naïve at first, I still wonder if it would somehow be possible to use an LCD/TFT/OLED or other Panel as an image-sensor. From my understanding of how these kinds of ...
0
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3answers
447 views

Passive reset circuit for multi-chip game design

I've been building a small handheld gaming device based around the ATTiny85 and an SSD1306 OLED screen. It's a very limited system and as such I needed to be creative about how I used the I/O pins. I ...
0
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1answer
58 views

OLED_M01122 Letters Orientation [closed]

I want to know, How Letters will display from following three types?
0
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2answers
455 views

lcd display with black background under a semi reflective mirror?

I'd like to make a "magic mirror", something very similar to this https://blogs.windows.com/msedgedev/2016/05/31/magic-mirror-hosted-web-app/, but much smaller. Basically, I have a closed box (no ...
0
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2answers
3k views

Interfacing I2C OLED display with pic18f2550

I've been trying to interface SSD1306 I2C oled monochrome display module with PIC18F2550 micro-controller without any success. the datasheet of ssd1306 controller shows the following data format so ...