Questions tagged [display]

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

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Extension from OLED display to driver board

I have purchased this display for a prototype in development. Product: https://www.displaymodule.com/collections/oled/products/2-8-256x64-monochrome-graphic-oled-display-module-spi-mpu Datasheet: ...
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36 views

Examples of using a circular polarizer filter for LED display

I was looking for ways to increase the contrast of a LED-based seven-segment display like this against indoor ambient light, and found this comment on EEVblog suggesting using circular polarizing ...
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122 views

Efficiently driving 6 LEDs in parallel

I have a display that has six white LEDs in parallel (common anode) as backlight. The LEDs' forward voltage is 3.2V, the current per LED is 20mA, so 120mA in total. The available voltages in the ...
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17 views

Problems with STM32F746G-Discovery using another display

I encountered a problem during the configuration of a STM32F746G-DISCO Board for the use with another display. Initial situation: I unsoldered the connection between the STM32F7 Board and the default ...
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1answer
43 views

STM32F769I display not showing framebuffer content

I am trying to get video to work on STM32F769I device. What I have done already is that I have changed the device tree so it has the required support and enabled the kernel features required for it to ...
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111 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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46 views

Is the phantom touch issue present in resistive touch screens?

Do phantom touches (ghost touches) occur in resistive touch screens, or are they only present in capacitive touch screen displays?
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1k 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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1answer
1k 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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1answer
29 views

Nextion Display not updating data from Arduino

I am using an Arduino Mega to display the readings of 4 pots on a Nextion Display as well as store it in an SD Card with the time stamp. I keep getting recvRetCommandFinished err on the serial ...
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1answer
155 views

SSD1306 128x32 OLED Initialization problem

I'm trying to run the SSD1306 128x32 on a NUCLEO board. But I can't get the thing to properly initialize. This is my initialization sequence. ''' ...
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2answers
43 views

What's the best way to dim a 5-inch LCD for a Raspberry Pi?

I'm trying to make a DPI display to work with my Raspberry Pi. First, I searched around and found out that the 555 timer IC is a good way to control the brightness of the display. Since the background ...
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28 views

MIPI display driver qualcomm APQ8909W

We are tring to brinup a new display for a Qualcomm APQ8909W chip that's running Android 8.1. From looking at the kernel log during boot I can’t seem to see what display driver is being used/...
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29 views

Timing diagram question of an EL-display

I am having a hard time interpreting this timing diagram of a Planar electroluminescent display; datasheet: Planar EL320.256-F6 pages 10-11 in the browser pdf viewer. If i read this correctly, it ...
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21 views

OLED 128 x 32 SYO12832B01 display problem

I am using a SYO12832B01 I²C OLED display with driver SSD1306. Here I am attaching the my initialization code. I got the correct data in the display, but the issue is I can't enable the internal ...
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24 views

LCD panel power supply

I'm looking at using a LCD panel (Chimei Innolux HJ0801A-01E) that is exactly the right physical size and resolution for a project - I'll drive it with a FPGA; I have looked for a while and I don't ...
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1answer
512 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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72 views

RGB 24-bit resolution on 12-bit DAC

I am looking to pass my 24-bit RGB color value through a DAC, but my resolution of the DAC is 12-bits. Would I have to reduce the resolution of each channel to fit it on my 12-bit DAC? Is there a way ...
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1answer
27 views

What is difference in link rate and pixel rate in Display Port

I was going through the Display port Specification. I came across below para "1.7.1 Make-up of the Main Link The Main Link consists of one, two or four AC-coupled, doubly terminated differential ...
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Are eDP driver boards compatible between resolutions?

I'm looking at various eDP to HDMI controller boards that are available. The ones that I've found identify a very specific resolution: 1920x1080 or 1366x768, etc. If I buy a controller board for ...
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1answer
441 views

Convert from VGA 9 pin to RCA (manually - old machine) [closed]

I'm in a trouble. Can someone help me? I have a very big machine where I had mounted an IBM 5151 monitor by VGA. The VGA cable was connected to the card below (see attachment), by 4 wires. Now the ...
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1answer
298 views

Analyze protocol used for Futaba VFD display, 3 data pins

I take apart a Samsung SMT-C7140 HD Unit (made obsolete by cable company, a shame) and found a nice display that I could probably reuse. It is a Futaba GL07-00006A (13-BT-246GINK). I tried to find the ...
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40 views

WEMOS D1 12V power source

In my project I am using WeMos D1 R1 to which I have connected I2C display 1602A , infrared LED (for remote control) and DHT11. As display and sensors are working on 5V I am using voltage level ...
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2answers
236 views

Dimming 6x large LED 8 segment blue displays

(source: perceptiveart.com) I am making a clock, using 6 rather large 7 segment blue displays. I am wondering 2 things. Do I need a bypass capacitor on the 12V supply for each UDN2981 chip? How can ...
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30 views

Pass bandwidth of backing light for LCD display

A stardard industry LCD display is composed of several parts. Polarizer film and color filters produce and image by masking the light from a source positioned behind the LCD itself, the so called ...
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2answers
529 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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1answer
618 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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1answer
53 views

What display is used in remote control

I'm making a device which requires a display, and the display I want is similar to what goes into remote control of air conditioners. What are these kind of displays, and how do they have some special ...
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1answer
481 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
252 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
147 views

Are all pixels addressed simultaneously in one frame?

In computer screens, is every pixel turned on during one frame? How can you address millions of pixels at the same time? Or is it like in CRT where it is scanned left to right, top to bottom?
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1answer
207 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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1answer
50 views

No display at all tests, but shows continuity [closed]

My multimeter buzzer is ok and sounds when continuity is checked. However, no display on the LCD. Also, no numbers are showing in every tests voltage, resistance, etc. I have replaced the battery and ...
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3answers
172 views

Why do displays have limited bit-depth?

As far as I am aware, HDMI 2.1 does support 12-bit 4K 60fps, Also it doesn't use TMDS, rather FRL. Sends upto 48Gbps GPUs can do calculation in fp32 and from some reference, I think that it can send ...
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1answer
10k views

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 ...
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37 views

SSD1351 Display showing random bars across the screen

I recently bought this Display and wanted to use it with an ESP-WROOM-32. After some problems I got it to work using this schematic and the Adafruit SSD1351 library. (I connected the 13V of the ...
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1answer
68 views

Microcontroller and design for multiple displays

at my day job I'm an application level developer, but I have an idea that I would like to prototype thats a bit more on the microcontroller side. Basically I want to be be able to display some static ...
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1answer
55 views

Minimum wiring for remote ST7735R SPI TFT display

Figure 1. ST7735R 1.8" TFT colour LCD. Image source: eBay. I have an ST7735R working on an Arduino Nano as shown below. Figure 2. Current setup. I want to try mounting the display remotely (< ...
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47 views

DVI interface current requirement

I am using DVI(display visual interface) interface supporting FHD at 60fps. What is the current requirement of DVI interface.
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72 views

How is called this peculiar rounded segment display system? [closed]

There are a number of industrial displays which use 23-segment columns to show semi-rounded alphanumeric characters and simple icons. An example photo: I cannot find anything about this system, like ...
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54 views

Splitting pins on USB-C

I’m new to EE and I have a project I’m working on that has confused me. I have an old display from a laptop that I want to make into a custom 2nd monitor, I bought a driver board for that model ...
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0answers
40 views

Units, ten and hundred in a 7-segment display (LOGISIM)

I need to know how to represent in units, ten and hundred on a 7 segment display in logisim. I need to do a college job that is necessary to convert 8 bits from binary to BCD, from this a carry ...
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2answers
54 views

increase the maximum brightness for a laptop replacement screen [closed]

I would like to increment the maximum brightness for a laptop replacement screen such as this one How difficult that could be? I haven't bought the screen yet so any hint about the type / model and ...
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2answers
69 views

How to convert pixel map to voltage/angles?

My end goal is trying to get something rendered using lasers and a MEMS scanning mirror. There are not that many resources online for this, but it seems like the basic idea is pretty applicable to ...
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1answer
61 views

Calculate RGB color ratio for a color space given a white point?

I am new to the field of displays and color science. I am trying to calculate RGB color ratio for NTSC color space using D65 white point. Can anyone point me to a good reference on it or how I can do ...
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2answers
317 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
89 views

Can you get “raw” TFT display panels where you drive the gate and drain lines directly?

I am learning about different display types and how I might interface them with raw electronic components, e.g., TTL chips, op amps, function generators for scan line sawtooth, etc. CRT raster is ...
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49 views

SPI MOSI line only hits 1.2V for speeds above 500kHz and below 4MHz (3.3V logic)

I'm trying to drive a ST7789 TFT display (datasheet) with an ATTiny-416, but for some reason SPI fails at speeds above 500kHz. So far I've had these results: 500kHz: pass 666kHz: fail 1MHz: fail ...
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1answer
610 views

Where can I find a datasheet/info of/on this “music speakers” 35 segment LED display with 7 legs? [closed]

Bought some "music speaker" thingies, some with bluetooth and some without. They are cheap, for sure, about 3 or 4 euro's. With some capacitor tweaks, they seem to be very plausibel to use (why is the ...
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2answers
101 views

Should a VFD be turned off when not in use, as much as possible, or should it be left turned on all the time?

I have bought a Noritake itron vacuum fluorescent display, to use in an Arduino project. A menu with settings will be shown on the display, and the user can interact with it by using some buttons. My ...

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