Questions tagged [tft]

TFT is a thin film transistor. However in common use it normally refers to a type of LCD display technology that uses thin film transistors located close to the pixels to allow higher contrast and beter multiplexing than passive LCD displays.

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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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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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Displaying bitmap on Arduino touchscreen TFT LCD

I'm having some problems displaying an image on my TFT screen, when called from within a custom class. I'm using the Adafruit pushColors method to push an array of ...
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99 views

Why shows the effect shown in the video below left-right asymmetry?

I made this video which shows what happens when I move the point of a wooden chopstick over my TFT-LCD screen, with firm pressure. It's remarkable that one can see that there is a difference between ...
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61 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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46 views

Setting HSYNC and VSYNC registers

I am using the FT801 (datasheet) to drive a Newhaven 4.3" TFT display (datasheet). The TFT datasheet specifies the normal timing parameters (hsync/vsync peroid, front porch, back porch) on page 6. ...
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How to configure TFT with raspberry pi3?

I am new here and need special guidance from seniors. I am currently working on a project about a realtime data acquisition system. I want to take inputs directly from a system using serial ...
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23 views

Looking for a 14 pin FFC, FPC connector for 1.8" display with unused space on the sides

Good evening, I'm looking for a connector that can house 14-pin connector display. Problem is that it has some extra space on the side which would not fit into regular connector. Does anyone knows ...
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36 views

TFT pinout tracing

I am total noob but curious when it comes to electronics, sorry if it's dumb or unachievable (shouldn't be). Just bought ESP32, played with it and realized I need a display, found a 7-seg one with ...
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55 views

Capacitor on clock line of TFT display

Short version (can provide more information if wanted) we have a display (TFT with TTL driver) that we control via PIC32 and Epson Display IC. The supplier changed their driver which should have been ...
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TFT RGB LCD construction and

I am trying to understand the construction of an RGB TFT LCD that has brightness control in it. I could not understand how does the TFT color LCD pixels glow? Does each of the pixel has its own light ...
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1answer
53 views

Allwinner H3 TFT LCD display 40 pins

So I want to modify this board in order to add a 40 pins tft connector to drive a 5" LCD 800x480 display so the user can "flip" between HDMI and TFT. I have no idea where to start, could you give me a ...
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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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In a thin-film transistor (on insulating substrate) what is the difference between putting a load on the source or drain side of the transistor?

My question was incorrectly posed, because I didn't include the capacitor connecting the gate to one of the terminal. So in fact this question is regarding common source vs common drain comparison...
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166 views

How can I make my ILI9486 Display not show my frame until I'm done? (Flickering!)

I have a ILI9486 TFT display and I am using an LPC1768 with it. The issue I am having is in the following: ...
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102 views

Why do we need to continuously refresh a high resolution graphics LCD while we don't need the same for a character LCD?

It is very easy to interface an MCU with a character LCD (let say, 16x2, 20x2, 20x4, etc.) because we don't need to constantly refresh what is displayed. Once we send what we want to see, it is ...
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STM32 TFT not displaying solid color

I am trying to use this display with an STM32F0 using SPI. I begin by setting up the peripherals using the following ...
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83 views

What is the right order for 16bit data on 8bit 8080 data bus

I'm trying to create a program to drive a TFT LCD with an ILI9486 in 8bit but I don't know if I must send the configuration data and commands MSB or LSB first. The color data for the pixels in 16bits ...
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105 views

Connect TFT LCD screen with flex band to breadboard

I'm asking for clues on how to do this, I didn't found much over the internet as everybody buys their LCD screens with a mounting to the breadboard of as a shield for arduino. The TFT screen I bought ...
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706 views

What register or setting can control the brightness of an ST7735 based 1.8" TFT Display?

I'm using a KMR-1.8" display which uses a ST7735 driver and it is working ok with the Adafruit_ST7735 library. The problem is the display is very dim once the library has initialized. If I reset ...
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1answer
55 views

Can I rip the screen off the Adafruit Mini Color TFT with Joystick FeatherWing? [closed]

I'm looking for a small color screen, and I came across the Adafruit Mini Color TFT with Joystick FeatherWing. But I want it to be a bit smaller, and I don't need the joystick and buttons on it. ...
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How to rotate a square on a TFT ILI9486 screen with Arduino

Problem Summary I have a “square” rotating on my 3.5 Inch TFT screen (ILI9486 driver) with dots/circles at each of its 4 corners. It is connected to an Arduino MEGA 2560 There are a few issues with ...
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40 views

Drive QVGA lcd with GPIO?

I want to drive a 2.2" QVGA LCD that has I80(Intel 8080) interface. I found that other people did it with microcontrollers that have XMEM(Atmega64) or FSMC(ST) . Now I want to know if it is ...
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How to drive a 3” TFT

I want to display 2 or 3 images in a loop (every 5 seconds or so) on a 3 inch TFT. The TFT can be found here, Resolution 240x400 Screen 3 Inch Tft Lcd with MCU Interface It uses an MCU interface, I ...
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153 views

Checking my understanding of this datasheet of a TFT LCD display?

I'm trying to modify an HDMI decoder board by Adafruit(https://learn.adafruit.com/adafruit-tfp401-hdmi-slash-dvi-decoder-to-40-pin-ttl-display/downloads) to work with an IPS screen that has a 51 pin ...
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250 views

What is the difference between MCU and TTL screens? [closed]

I'm trying to build a HDMI decoder board for a 4in 480x800 IPS display. I found an HDMI decoder board on adafruit(https://www.adafruit.com/product/2218) which says it works for most 40pin TTL displays....
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448 views

Matching LCD controllers to LCD compatible panels

Over the years, I've accumulated numerous LCD panels and controller boards salvaged from TVs, Monitors, Cell Phones, digital picture frames, GPS devices and tablets. I would like to reuse the panels ...
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HMI design industerial [closed]

I'm planning to design HMI for a product that i want to design. but, I've questions that I couldn't find answers to: 1- TFT or OLED screens, are they reliable? do they last for > 10 years? (ok, yes ...
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70 views

Question about how the circuit of TV display works

I have a question about how the circuit of TV display works. Does current flow through the gate lines (horizontal lines)?
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101 views

Interface TFT LCD with PC

So I have this LCD lying around, and I was wondering, is there any way to interface it with a PC? Be it USB, HDMI, VGA, planning to use an old PC with it. I don't need to use the touch controller, ...
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720 views

ILI9341 pinout problem

I recently ordered a LCD TFT 3.2 inch touch display from aliexpress: ILI9341_3.2_TFT_LCD I'm currently going through documentation for the chip (ILI9341_documentation) and I can't "connect" all the ...
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497 views

For a STM32, can I use a quad SPI and SD card as a framebuffer for a LTDC LCD driver?

I'm using STM32F756 The SD card is 20 MHz and I know the performance would suck for an 800 x 480 display, but will the hardware do it? Or is RAM the only medium required? I screwed up, have no ...
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634 views

ILI9488 LCD Parallel Bus Interfacing?

I have this 3.5" LCD with a ILI9488 COG driver IC, it supports both serial & parallel interfaces but using SPI I can only get very slow frame rates. The end application will be translating a ...
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733 views

ILI9341 with STM32 SPI troubles

I am trying to interface with an SPI ILI9341 screen using an STM32 microcontroller. I know there are a whole lot of things that can go wrong with these interfaces, and I've spent an awful lot of time ...
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2k views

Nucleo STM32L476 and Arduino TFT shield pin mapping

I want to use an Arduino TFT shield (ILI9341) on a Nucleo STM32L476 developement board. This shield use 8 bits MCU mode and work well but the pin implantation for the Arduino connector on the Nucleo ...
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568 views

Endianess on STM32F4 FSMC output

I'm currently setting up a STM32F407 to evaluate a display module which utilizes a Renesas R61526A Displaycontroller. I was able to set up the project using CubeMX no problem, and the FSMC seems to ...
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247 views

Arduino - hacking 240 x 160 TFT LCD

I have an 8-bit Monocrome TFT (240 x 160) that is driven by MCU-A. I have MCU-B (Arduino) that needs to read the TFT Display in real-time. So far, I was able to 'split' the Flex wire to both MCU-A and ...
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2k views

My 2.2" TFT LCD doesn't work (ILI9225 driver)(STM32F1)

Today I was working on this TFT LCD and I don't know why it doesn't work. This LCD is a 2.2" TFT with ILI9225 LCD driver and is connected to my STM32F1. Here is the datasheet of LCD driver: http://...
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2k views

Interfacing ILI9341 with PIC18Fxx series

I am new to embedded development, so please bear with me. I have to interface a TFT display(ILI9341) with PIC18F452, it does not have any controller chip, I want to run a simulation with Proteus ...
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391 views

Beaglebone Black LCD/TFT/display and I2C2

I am considering buying a 4D Systems I2C LCD for the BBB, e.g. a 7" touchscreen, which uses the I2C2 bus. The question is, will I be able to use other peripherals on I2C2, on a home made cape, ...
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1k views

LCD TFT Voltages

I'm making a board for a WF101-1024600AL#Z01B-FC TFT LCD. I don't understand (simply the datasheet doesn't help) what I have to do with VGH, VGL and AVDD. Should I provide these voltages externaly ...
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603 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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3answers
1k views

Driving Nokia TFT LCD with STM32

How do I increase the refresh rate of a Nokia LCD that I'm driving using the STM32F103 microcontroller? The LCD is 132*162 and takes a 9-bit instruction/DATA with RGB for each pixel in 565 format. ...
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1answer
730 views

touch screen foil behind 5mm thick glass

I wish to make a small project that will enable me to control my tablet\ipad behind my shower glass door. I want to be able to put the tablet behind the glass and control it from the other side of the ...
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1answer
866 views

Selecting the correct ILI9341 Drive Mode for STM32F407 using FSMC

I have selected the STM32F405 for my next project. With this controller, I am planning to drive a 240x320-TFT with an ILI9341 display controller by using the STM32's internal FSMC interface. I have ...
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161 views

Need for 3.3V regulator

I have seen several products ( such as the pitft for the raspberry pi, and most other small tft screens) which use a 3.3V regulator on the 5V power rail to provide power to the 3.3V system. In some of ...
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1answer
129 views

Why did my Gameboy shut off during takeoff? [closed]

When I was young I remember playing my Game Boy Advanced SP in the airport terminal. When we boarded we were asked to shut off all electronics. I was setting a high score in Pokémon Pinball: Ruby &...
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1answer
399 views

TFT backlight control via GPIO

I need to control TFT backlight via single GPIO output from atxmega128a4u. The LCD backlight requires +3.0V, while the rest of my schematic runs on +3.3V. I do not have access to backlight ground pin,...
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113 views

Unsual sizes of TFT, LCD or OLED panels?

On Stackoverflow there was a question about a round TFT display, but that answer was difficult and pricey. What is the possibility of finding rectangular LCD/TFT/OLED displays that are small in ...
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738 views

LCD Data Pins from different ports

I am using LPC1769 and it's port pins as below image. DB0 to DB15: Port pins of LPC1769 used as data pins for LCD Control Signals for LCD: C/D : Register Select Command or Data /WR : ...