Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [display]

Questions about LCDs, 7-segment LEDs, E-ink displays, etc.

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How does my screen driver handle so much data?

I just did some quick calculations: On my MacBook I have a resolution of 2560x1440 multiplied by 24 Bit for colors we get 11.05MB for a single picture or 663MB per second at 60 fps. I guess there is some compression, but for example when I move with…
Felix Crazzolara
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What is this unusual LCD controller technology?

Preface: Even if you do not have a definite answer, I would greatly like feedback from anyone who has even seen an LCD using this technology. I recently took apart a Canon digital camera from the late 1990s and obtained an unusual LCD display.…
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Why does "flashing" prevent ghosting on E-Ink displays?

Anybody who owns an E-Ink device (like a Kindle) will be familiar with the phenomenon of "flashing" -- basically, when turning a page, the device will first flip all of the pixels to black, then draw a "negative" of the page, and then invert the…
Adrian Petrescu
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How electronic price tag works?

Today I was in Tesco in my city and I saw something quite interesting, that was electronic price tag: I don't know how it happend, but on a parking I found this price tag in my basket beneath some old papers and leaflets... It was very late, so I…
SP5RFD
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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 elements. Also I would like to know if the…
Coder_fox
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LVDS vs MIPI, what's the difference?

What are the practical differences between LVDS and MIPI? A little background information: I am attempting to build my own projector on the cheap and want to use a nexus 10 LCD panel (2560 X 1600 resolution) but I have been reading mixed…
Craig Lafferty
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What is this type of flexible contact strip called?

The LCD below is from a cheap digital clock which was (obviously) damaged (broken glass). The electrical connection between the PCB and the display was realized with this pink strip. Its flexible... ...and consists of alternating rows of…
Rev
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Low power, seven segment display

I want to display a 4 digit number on a small device that fits in a hand. I have a CR2032 3V battery at around 230mA, my microprocessor is a 8051 (in a BLE112) usually uses about 0.9µA and I want the device to last as long as possible. I've looked…
Hink
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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, and will likely require the use of an FPGA to…
Clifton
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Ghosting in VGA signal generation

So, I'm generating a 1280x1024 (native screen resolution) VGA signal using a Lattice HX8K > Yosys, according to these timings, and a PLL of 107.812Mhz of Pixel Frequency. I then pass it through a simple scaler to achieve an effective pixel…
Hugo Sereno Ferreira
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11
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How exactly does a VGA cable work?

I've been looking around on the internet and I can't find anything in depth on how the cable/connection functions. I've only been able to find simple pin out descriptions. If someone can link me or point me in the right direction, I would be very…
Josh Beckwith
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Understanding memory requirements for an image file

I want to understand the memory requirements for image resource files to be displayed on a 240x400 resolution display. The display has the following specs: It supports upto 18 bits color depth and uses ILI9327 display driver. Assuming that I need…
Whiskeyjack
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How to deal with unicode characters with character LCD displays?

I would like to buy an LCD screen fom Arduino to display some results from a web http call; the Web API returns a JSON text encoded in UTF-8. I've read that ICU is the way to go to handle Unicode in C/C++ programs for Arduino. My questions: Will I…
systempuntoout
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Create multi touch display for full light

We have been given a project at uni to create a multi touch display. I've done some research into this and a lot of them call for special film on the glass or use a projector (meaning it needs a certain amount of darkness). I want to make a multi…
SaM
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Justification of the choice of colours in monochrome displays

Why for monochrome displays was chosen green, gray or yellow(amber) colors? Any reason like red LEDs because it simpler in production. upd: Amber for reducing eye strain. Gray for white imitation. but why greeen?
Torv
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