Questions tagged [display]

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

43 questions with no upvoted or accepted answers
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123 views

Calculating LCD display horizontal and vertical porch values

How should I set the porch and sync values given an LCD display? For example, say my FHD (1920x1080) display datasheet says its has a total vertical cycle of 1125. I have 45 clocks remaining (...
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77 views

How to determine wiring of unknown LED scrolling display board

My school has a LED scrolling display board from long ago in the main lobby. When I flip the power switch, it turns on and starts displaying zzzzzzzzzzz... There's a connector on the outside (2x10 ...
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535 views

Controlling a 4 lane DSI display from RasPi 3

I have a DSI display which runs on 3 data lanes. Can this be controlled from a Raspberry Pi 3 which has a DSI interface that only supports 2 lanes? Looking for a yes or no with a reason. If you have ...
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58 views

LVDS (from PTN3460) driven display shows fringed lines

I am developing a board which converts DisplayPort to LVDS. The LVDS is put through a PCIe switch and then fed to an APIX transmitter, which connects to the display. There's a second video path going ...
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1answer
33 views

Recommendation ITU-R BT.1729 test image for 5:4 display

For radiated emissions testing according to EN 55032 CISPR 32 with displays of category 4, there is a Recommendation ITU-R BT.1729 which specifies a reference test pattern. The pattern is designed for ...
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63 views

Ghosting Issues with IPS and TFT Panels ( from Waveshare and Sony ZUltra)

I've bought a used Waveshare IPS LCD and it has a ghosting issue, were as if you turn it on after about 30 seconds it starts to have ghosting and also burning on the edges effects, I am 90% sure that ...
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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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1answer
310 views

PIC32MX UART Interrupt Not working

I am writing a program to send data from one microcontroller and receive the data using on another PIC32 microcontroller and display the received data on LCD. I am using UART2 of both PIC32MX to send ...
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1answer
321 views

LVDS display troubleshooting

I am currently working on a prototype connecting a SOC-board (Samsung ARTIK530) to a LVDS LCD display (DT070BTFT-PTS1). The display shows a very (!) distorted picture. I have tried fixing it using ...
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55 views

How Backlit LCD Moniter Works, How it Looks Without a Backlight

I'm thinking about repurposing an lcd backlit monitor's front panel as an 'overlay' type panel over something else without a backlight. My understanding of the function of a backlit monitor that the ...
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47 views

With multiplexed displays, what is the correct term for a single “frame”?

Let's take a look at the following animation demonstrating time division multiplexing. Source As you can see and probably know, the image is shown by displaying one line after another in rapid ...
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1answer
920 views

Help driving an old Vacuum Fluorescent Display

I recently salvaged a VFD from scrap, and am currently trying to get it to display light (not worrying about actual numbers/letters yet, just trying to get it to light up). I've read up about these ...
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87 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 ...
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405 views

Discrete logic multiplexer

I posted a more in-depth outline of what I'm doing here, but basically I'm building this circuit (for n=3): The circuit displays an output based on the combination of three three-input DIP switches. ...
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8 views

What is AUX CH handshake in Display port

In the section 2.5.3.3 Link Initialization through Link Training "There is another exception for a box-to-box connection. When DisplayPort Source Device is resuming the transmission, the Source ...
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1answer
20 views

Do we need to send HSync, Vsync, HFP, VFP, HACTIVE in the Display port

On going through the display port specification, in the main stream packet structure I see only the pixels getting packed between blanking start and blanking end. Don't we need to send HFP, HBP, Hsync,...
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1answer
22 views

What is inter-lane skew insertion in display port

I am reading the display port specification facing some issue in understanding some terminology 1. What is inter lane clock skew 2. In the fig 2.8 what is bus steering ?
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29 views

What is the difference between 960RGB and 1920RGB?

In MIPI DSI display resolution, what is the difference between "960RGB * 1920" and "1920RGB * 960"?
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22 views

Interfacing a MIPI DSI dislay

I'm designing an interface board to connect a MIPI DSI LCD screen to an RPi. The screen is a KWH070KQ40-C08 (link to pdf), but the datasheet isn't quite clear and I ...
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32 views

How to display Keyboard's binary to Digital waveform

How can I display to a monitor a digital waveform of any key when pressed in a keyboard? I was thinking to use an arduino or a raspberry. For example, when I press the small letter 'a' on a keyboard (...
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63 views

HDMI Development: What Would Cause Thin Pink Lines?

I recently designed a board which produces an HDMI output for an oscilloscope so it is viewable on an external monitor. My prototypes seemed to work just fine with one or two mod wires. However, after ...
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0answers
25 views

How to find out which Linear Polarizer Film Angle is right for repair?

I recently bought a broken monitor on eBay. The seller partially tore off the polarizing film thinking it was a protector of sorts. Now I want to replace that film. How can I find out which angle (90°,...
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41 views

OLED SS1306 displays on one side only when using AVR

I have an I2C 128x64 OLED display here. I've tried using Arduino and everything works flawlessly. Now I'm trying this but just writing in straight-up C code. Majority of the display is garbled up. I'...
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58 views

MIPI DSI display initialization not following standard DCS commands, uses 0xFE instead

I recently was looking at a MIPI DSI display for use in a potential product, when I noticed on its datasheet that the DCS commands it was using were not part of the official list I have, nor do they ...
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2answers
350 views

Why backlight an LCD display with AMOLED? Can IPS terminology apply to AMOLED?

I've been reading about IPS LCD and LED/OLED display technology in general, and am a bit confused about the following product: HP Spectre x360 2-in-1 Laptop: 15.6" 4K, i7-8705G, 16GB DDR4, 512 SSD, ...
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69 views

Custom LCD display design considerations

I'm in the early stages of designing a device that will have a custom, backlit LCD display and an injection molded case. I've never worked with a custom LCD display, and have not yet spoken with any ...
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2answers
209 views

I2C Communication Between STM32F3 and SSD1306

I am trying to write data to my 128x32 OLED display. I researched it online and found that it has the SSD1306 controller connected to the display. It uses the I2C protocol and it only has 4 pins (VCC, ...
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1answer
30 views

Using port 0 in AT89C52 without pull up resistors

So at my university professor gave us following scheme to program this double 7 segment display on the right. At start I tried to simply adress it using P0=(someData) although it didn't work. Then I ...
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2answers
475 views

Constant flickering of TFT Display

We have an issue with our TFT display. The display constantly flickers while displaying. What are common causes for flickering in this type of display? How can we resolve this issue? It's a 3.5 inch ...
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44 views

Zebra strips with possible gaps

My Breville oven display shows some missing characters and some dimmed characters, after 2 crosstown moves. I have disassembled other devices in the past, but those were repairs for other people. I ...
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0answers
74 views

cost efficient BOM for total 10x12 16 segment (1920 led) display

I've already built a few test prototype for a large(ish) 16-segment display board. I want to use a Arduino of ESP8266 to run it, with external power, and ICs for the Characters. So far, I've been ...
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1answer
380 views

XV0 and V0 - what does it stand for?

I'm looking for suitable GLCD, so far I have found the RX12864H, however the datasheet describes a lot of voltages and I'm bit confused. While the VSS and VDD are clear to me, I have no clue what do ...
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1k views

AMOLED display vs. LCD display: Power consumption when displaying white only?

LCD's power consumption only depends on the screen brightness setting, not on the displayed content, unlike AMOLED, where brighter colours (towards white) cause more power consumption, while black ...
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50 views

Does parasitic capacitance increase the load value of electrodes?

I'm reading Samsung Display's patent about a display notch. In this patent, the inventors say that providing a parasitic capacitance to scan lines increases their load values. Can anyone tell me why?
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1answer
85 views

What kind of display connector is this?

I'm looking into using this display for a small project I'm working on, but I'm not positive what kind of connector it has: http://www.alibaba.com/product-detail/2-4inch-transparent-oled-screen-...
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105 views

How do I drive this display?

I would like to know how to drive this little e-Ink display. The company supplies a demo kit and a sort of "adaptor circuit" (basically a breakout board with a few capacitors, which allows one to use ...
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528 views

Reusing LCD TFT Panel

Recently I have taken an old MP4 apart so I could maybe reuse some of it's parts. One of them is the touchscreen panel, but the big problem is, I don't know the pin layout of it. Is there a way I ...
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1answer
212 views

Working with LCD Optrex F-51684 without datasheet

I have a display from Panasonic car stereo (Toyota Corolla), but can't determine how to work it. It's called Optrex F-51684, and there is no datasheet for that LCD. Is it possible to find how to work ...
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1answer
109 views

16 Segment Display Driver ICs

I would like to know what are the available ICs for 16 segments display to control. I have 1 digit three 16 segment display so I want to control those three displays separately by microcontroller. ...
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1answer
107 views

How can I design a Caesar cipher encrypter and decrypter without using Non-programmable circuit components?

My device should be able to take an input from A-Z and another input to from 0-25 and finally a Encrypt or Decrypt option. Currently I have given A a code of 0000, B 0001... so on and the output will ...
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1answer
54 views

Interchangeable 7 segment display - CA and CC

In my application, I should control 4 display composed of 7 segments. I want to use a classic method with 4 BJT and segments all driven by a Micro. An update rate will show up each value on the ...
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1answer
114 views

Connecting multiple 1inch lcd displays to only one MCU

i'd need to connect multiple very small (1inch if not slightly more) square lcd displays to only one controller unit. I searched for it but being not an electrical engineer it seems i lack some ...
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1answer
105 views

ssd1306 (30 pin) oled display eagle library

I am designing an electronic project in Eagle PCB software. The project having a 30Pin SSD1306 Oled Display. I searched in the internet for the eagle library and i cloud not find a matching one. The ...