Questions tagged [display]

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

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59 views

Help with SPI routing for a display

I’m designing my first PCB and got weird SPI issues after my second revision of the PCB layout. I did a few small changes for the SPI routing in the second revision but nothing that I thought would ...
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1answer
50 views

How to turn off and turn on LCD 16*2 display?

I build a device in which I check data on LCD display 1 or 2 times a day. So when I tried to turn off my 16*2 display and re-plugin in the middle of running the machine it gives some garbage value. ...
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33 views

STM32H743 FMC with ST7789 doesn't work without delay

I have an STM32H743 connected to a screen that uses ST7789 via FMC (i.e. parallel connection) using 8-bit bandwidth and A18 to select between command and data. The current code has an issue that the ...
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25 views

LUT from OTP vs LUT from register on e-paper displays

What is the meaning of LUT from OTP and LUT from register on e-paper display convention?How could we program the e-paper display using LUT from register? I'm working on GDEW0213T5D e-paper which uses ...
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32 views

LCD backlight current consumption

I am designing a power supply adapter for a 7" LCD PH720128T003-ZBC02. The main voltage is 3.3V. This is enough for the internal logic regulator (VDD) and analog circuit (VCI) but not for the ...
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27 views

E-paper display working problem- UC8151D driver

I'm working on e-paper display GDEW0213T5-D product which including UC8151D IC driver.I can communicate with e-paper with SPI interface however there are problems with showing correct things(e.g. ...
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1answer
22 views

What are the main parameters to check display with display controller

I have MAX9278 deserializer IC which is connected to a 3.1inch TFT display 800 (W) * 480 (H). Deserializer provides 4 LVDS lanes and 1 clock to the display. What are the major parameters that I need ...
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50 views

LCD clears itself when potentiometer contrast is too low

I'm making a project that requires an LCD, and the project was working fine on my breadboard for testing. I moved it to my final product, but now my LCD stops displaying text after a few minutes, or ...
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35 views

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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2answers
39 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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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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48 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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1answer
63 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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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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34 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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44 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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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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25 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
76 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
37 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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1answer
50 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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11 views

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
461 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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48 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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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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1answer
55 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
172 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
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
191 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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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
72 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
79 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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1answer
77 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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0answers
55 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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42 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
65 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
71 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
80 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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50 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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2answers
124 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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1answer
92 views

What is Symbol Clock Frequency?

I came across the term Symbol Clock Frequency in this Intel programmer reference manual (P131). I could not find what the symbol clock frequency actually is in the manual or online and thought it ...
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2answers
176 views

Vacuum Fluorescent Display: What are the benefits of an AC filament driver instead of DC?

Question is already in the title: What is/are the benefit(s) of an AC filament driver instead of DC for VFD displays? It works with DC so why to invest in an AC driver? Anyone?
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3answers
115 views

Why are graphic displays still so expensive? [closed]

As a new electronics enthusiast, I've been able to score a lot of components for very cheap, ranging from beefy MCUs in the 10$ ballpark to heaps of ICs for sub-dollar prices. However, buying a coffee-...
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1answer
101 views

Connecting display to arduino [closed]

So i've been googling displays for the Arduino, and they are all usually small or the wrong shape, but they all seam to have GPIO connectors in the back (shields) that connect directly to the Arduino. ...
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1answer
50 views

Displays used in clocks - use with Arduino/ESP32/PIC [closed]

I'm working on a project with a micrcontroller and I need a low-power display similar to something shown above. Does anyone know what these particular displays are called and whether or not there ...
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1answer
85 views

How would you connect a LVDS display to a laptop motherboard supporting natively a different display?

I'm planning a project of building a 4:3 laptop based on existing (modern) components. As 4:3 displays are not manufactured anymore the idea is to take one from a old laptop, like a thinkpad T60. Then ...
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46 views

2 Digit Integer Display in Proteus

I have a homework which I am working on right now. Design a counter that counts 0 4 6 8 12 14 0... (mod6) and when to counter shows 14 it is going to stop and wait for 3 minutes. After 3 minutes ...
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45 views

How to connect generic smartphone LCD screen to take HDMI input from e.g. laptop?

For a certain project that has a specific screen size requirement, I want to use a phone-sized screen (6") to take HDMI from a laptop. Here is an example product: https://www.amazon.ca/Digitizer-...
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1answer
106 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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