Questions tagged [display]

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

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27 views

ST7789 display: pins IM0, IM1, IM2, IM3 are not accesible

In a [ST7789 LCD](https://www.adafruit.com/product/3787, how do I set the IM[3:0] pins for select the MPU Interface Mode? The manual just shows the values of IM[3:0] for each interface but doesn't ...
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99 views

Nokia display stopped working

I had plenty of Nokia displays so I decided to use them with microcontrollers. I found pinout instructions from here, connected one of the 3310 LCDs with my ESP32 because it runs on 3V3 and using ...
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2answers
54 views

Directly connecting MIPI Camera and Display

I have a little bit of a hard time wrapping my mind around MIPI. My mission: I want to connect a MIPI camera directly to a MIPI display. Camera pin-layout: Display pin-layout: The Interface of the ...
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1answer
77 views

Help driving a display

I am trying to figure out a way to drive this LCD display, the datasheet can be found here https://datasheetspdf.com/mobile/611974/LG/LB070WV1/1 on page 8 it has some info on the connector/interface ...
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Can I and how I use datasheet registers to activate scaling up on the RTD2660 display controller?

I have a chinese display with hdmi driver board using RTD2660 controller chip. I want to use it to mod my Playstation portable with a bigger screen, but the problem is that psp outputs image with ...
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1answer
50 views

Contrast voltage for display from PWM with negative rail

I want to control the contrast of this display using a well-filtered PWM output. They recommend a potentiometer between Vdd and Vee (negative built-in rail): With my MCU I can generate a filtered PWM ...
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46 views

How to supply an OLED module with 13V?

I have an OLED module that uses 3V for logic signals and 13V for the LEDs. What is the common way to drive the 13V for OLEDs? With a regulator or some kind of special LED driver? I have seen some LED ...
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51 views

calculating if heat from regulator can start a fire or melt ffc

I have a flat flex cable (to a display module) close to a regulator (maybe the ffc are even touching the regulator) in a product I am making. Worried about if the regulator's heat will destroy the ...
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1answer
44 views

How can I use this LCD with Arduino?

I found my LCD somewhere from some remote control. And as I am a beginner, I would like to ask you guys how could I connect these LCD with my Arduino Uno so that I can display the numbers on this LCD.
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1answer
75 views

Why does broken monitor have vertical lines [closed]

I unfortunately dropped a pointy object and it pierced a tiny area of my monitor (AOC U32E2N). I was surprised to see that the whole area of the impact (where physical damage can be seen) is ...
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76 views

What is the interface type of this LCD?

I'm trying to find out if this LCD uses eDP, or MIPI DSI, or something else so that I can choose a replacement LCD, and I'm a beginner at this. I wasn't able to find it on the manufacturer's website, ...
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57 views

Why do IPS/OLED need to be covered with glass when e-paper does not?

I wonder why the major criteria of comparison of IPS/OLED displays is how reflective they are, but e-paper seems just to "enjoy" direct incoming light without that side effect. I've tried ...
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26 views

Transparent displays that allow UV light/sunlight to pass through them?

Is there a type of digital display that can work to let sun through it, so that the dark pixels block the UV, and transparent pixels let the UV through? I'm aware of monochrome LCDs for a resin ...
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1answer
86 views

How do LCDs power a specific pixel?

I have a vague idea of how LCDs turn on and off, but I still don't understand how an individual pixel could be turned on and off without having like tiny wires behind each etched area (which can't be ...
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1answer
39 views

Are rgb changes affected by monitor response time?

If I'm not wrong, response time on monitors just has to do with how dark or light the image is. In that case, if a monitor has a dark blue frame followed by a light red frame and response time is 10ms,...
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80 views

Do frames start to display during the end of the previous frame or during the beginning of the next frame?

If one frame is transitioning to another frame, and a monitor has a 4 ms response time, does that 4 ms transition happen at the end of the first frame so that the next frame displays on time, or does ...
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2answers
658 views

Russian к2лн641 VFD (Vacuum Fluorescent Display) driver pin out help

I have recently acquired some IV-3 VFDs (Vacuum Fluorescent Displays) and they came on an old PCB with drivers. The driver is a к2лн641 and have found a datasheet on it with some information, but it ...
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2answers
189 views

Am I crazy or has my collegue made a mistake?

I am reviewing a prototype design that someone else made. In the design, they use this part. See image. There are made holes in the PCB for the green marked plastic pins but only exposed surface ...
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1answer
67 views

How can I feed images from a Raspberry Pi to a very old handheld projector?

I have this very old handheld projector: And its connector cable looks like this (5mm wide, white), if I am not mistaken: My questions are two-fold: Can anyone guess what standard/format of input ...
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119 views

ILI9341 display interfacing with stm32f103c8t6 with TFT_ESPI library

I am trying to configure stm32f103c8t6 bluepill with ILI9341 display using the tft_espi library . Connection stm32 ILI9341 PB15 -> MOSI, T_MOSI PB14 -> MISO, T_MISO PB13 -> SCK, T_SCK PC15 -&...
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123 views

How to connect a display with MIPI DSI connector X to a board with connector Y?

I want to connect a touchscren display to a development board via MIPI DSI interface, but their connectors do not match. The display uses a 30-pin FCC, 1mm pitch, double-side contacts connector (link ...
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1answer
57 views

Synchronize IR sensor output and HDMI (FPGA)

I'm having problems when trying to synchronize output from IR camera and hdmi transmitter. I use cyclone FPGA and ulis IR sensor, for describing how I use Verilog. Sensor frame rate is 60 fps, same ...
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1answer
97 views

Breadboard-type interface to ILI9341 ST7735 TFT display

I have an ILI9341 ST7735 240 x 320px display which I bought intending to use with a 6502 IC. However I cannot find any details online of the basic method of interfacing - all electronics projects seem ...
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254 views

Difference between LVDS, MIPI, DPI and DSI

I'm on a project that involves TFT displays and Raspberry Pi Compute Module 4. I noticed that there are several acronyms, protocols confusing information. As I understand it, there are protocols: DBI:...
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1answer
104 views

SSD1351 PMOLED display pixel color affected by other pixels on the same row

I am currently writing software that makes use of a SSD1351-based display (from Waveshare). I have noticed an issue most visible with a dark blue background: when some brighter colors are on the same ...
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1answer
168 views

Using an RGB TFT screen on the Raspberry Pi 4

I want to use the HT0700EI02A TFT screen on the Raspberry Pi 4 Compute Module. Raspberry Datasheet: https://datasheets.raspberrypi.org/cm4/cm4-datasheet.pdf Screen Datasheet: https://cdn.ozdisan.com/...
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1answer
56 views

Custom TFT Screen Question

I'm looking to get a custom Resistive Touch TFT screen made for a project. The company have specified that the screen will utilize a F31L-1A7H1-11040 type connection to go between the screen and ...
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3answers
809 views

Why do LCD screens need to refresh in the first place?

I understand how screens display something; essentially by refreshing very fast so that any changes are quickly visible. However, to me, this seems like a very inefficient way to solve the problem. ...
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2answers
73 views

PAL Video - Horizontal Color Pixels

I've created an 8-bit VGA controller that outputs a 400x300 RGB signal. I also want to implement an AV output using PAL encoding. I don't understand how I can achieve the same resolution since the ...
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1answer
53 views

TFT display wiring on Sparkfun Pro Micro

Please help me configure the wiring for this TFT display. I’ve tried using the Waveshare TFT display with both the Sparkfun Pro Micro and the Raspberry Pico but had very little success. Only the ...
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45 views

Non white lines on 1920x180 LVDS controlled TFT

We are integrating a LVDS 27" 1920x1080 panel with a commercial DVI to LVDS controller board. We have a PC, that has a DVI output, and we connect it to the Video controller. The video controller ...
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1answer
69 views

Understanding image display on a TFT/LCD display

I am doing some reading about interfacing displays with an MCU. I came across this block diagram: About the display controller, the following is mentioned: The display controller is continuously “...
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50 views

Overvoltage shut down

A LCD display controller includes a 5 times DCDC converter. A circuit is needed to ensure that the in case of a fault in the display the 5 times voltage can not return to the CPU circuit in anyway. ...
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2answers
179 views

What refresh rate do digital stopwatches use?

We've all probably come across these kinds of electronic stopwatches at some point: They almost always claim to count centiseconds (although this one counts in milliseconds), but do they really have ...
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1answer
60 views

Can I use unregulated power supply for LCD display backlight LED?

I am designing a PCB for a university project that will include an LCD display which is powered by 3.3VDC regulated supply. Unfortunately this display has backlight LEDs in series that have total ...
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2answers
70 views

Inappropriate readings of pulse and temperature sensor (LM35)

I am facing quite a bit trouble with an LM25 temperature sensor. The readings are a bit too high (90-120*C) for room temprature. I have tried thefollowing things to get an expected result but none ...
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1answer
123 views

1980s AVTEL 4 colour mechanical display, how is the pixel state reset?

I stumbled on a retro Dutch video from 1983 where a large four color mechanical display is shown. Each pixel consists of a cube which can be turned in order to change the pixel color between 4 colors (...
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59 views

What is the infrared controller in Nook Simple touch?

I got an old Nook Simple Touch from my brother and it worked before. But it has been covered with mold so I removed the plastic case and it still boots, but cannot respond to any of my touch. I found ...
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1answer
21 views

GMSL Deserializer to LCD Link Rate

I need to calculate the Link Rate for my GMSL Deserializer which is connected to a 800 * 480 TFT Display. In that case, I stumbled upon this Article On the last few lines, they are asking to multiply ...
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1answer
67 views

What are the display parameters for a TFT LCD?

I want to use this display with a system on module running Linux. I need to configure the device tree below with the parameters for the display so it will work properly. A description of these ...
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1answer
90 views

How to adjust both brightness and contrast of a TFT LCD display

I am developing an HMI using the display "S039QWQ01HS" and I have the requirement to provide control to adjust the brightness and contrast of it. For the brightness control, I have already ...
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34 views

MIPI DSI-2 contrast control and buffers for 3d printing

I've got a 3d printer, and it uses a mipi-2 DSI LCD. The display is driven via an HDMI to MIPI adapter board. Unfortunately, HDMI does not contain ways to adjust display contrast, and the adapter ...
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21 views

does the order at which HDMI differential signals should be connected matter?

I have 8 DDI (Digital Display Interface) signals that come out of the CPU with a certain numbering from 0 to 3. I want to connect these signals to HDMI connector. I was wondering if there is an ...
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76 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
268 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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1answer
162 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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181 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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65 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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0answers
66 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
25 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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