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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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No touch points close to the edge of the screen

Just for fun and to learn, I'm writing code to drive a 800x480 TFT with resistive touch driven by an RA8875 and an ATmega328P and avr-libc. It works fine so far but when reading touch events, I don't ...
Torsten Römer's user avatar
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ST7735 1.44" SPI TFT GreenTab: white lines/ghosting (no hardware fault!)

I have been using SPI-TFTs for a while now, usually the 1.8 inch 160x128 also with ST7735 controller. No problems. I bought multiple 1.44" ST7735 square 128x128 TFTs over the last year. Today I ...
sutt's user avatar
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LCD_TFT HSYNC | LCDTFT VSYNC | LCD_TFT DE

I have a 320*240 LCD with an ili9341 driver that I want to drive using the LTDC unit of a microcontroller. However, according to the datasheet, my LCD does not have VSYNC, HSYNC, and DE pins. Can you ...
Alireza ganjeh's user avatar
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Fixing TFT flexible pcb [closed]

I have damaged the flexible/ribon pcb on my display (as shown in the pictures below). I was thinking about soldering it, but the traces are tiny. Replacement isn’t possible. What do you guys think i ...
Vid's user avatar
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STM32 LTDC design considerations with an 18-bit vs 24-bit RGB interface

I'm using a LCD with a ST7701S driver and it has an 18-bit RBG interface. To control it I am using a STM32H7 with the LTDC peripheral. I have been prototyping with the STM32H745-Disco which has a LCD ...
Alex Jegers's user avatar
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EMC-EFT problem with touch screen

Before taking this job, I had never been in a laboratory and did not know these topics. Moreover, when the chief engineer left work, all the testing was left to me. This device passed RE and CE side ...
mrneedshelpalot's user avatar
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Adding backlight control for Raspberry Pi Zero 3.5 inch tft touch display (GPIO)

Can somebody please help me how i can modify TFT35 display for backlight control with PWM (Raspberry Pi Zero 2 - GPIO 18). I found one solution on GitHub (https://github.com/wild-mustango/VenusOsTFT35)...
Danster's user avatar
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How do I control the brightness of a TFT LCD through SPI (No Backlight Pin)

I recently purchased a TFT LCD (GMT020-02 VER1.1) The screen uses the ST7789V LED Driver and does not include a backlight control pin, So Originally I though that it was impossible to control it (i.e ...
Trippy 741's user avatar
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How is it possible to change RGB color filter panel to BGR color filter panel if the color filter is physically firmly mounted on the LCD display?

How is it possible to change RGB color filter panel to BGR color filter panel if the color filter is physically firmly mounted on the LCD display? TFT display design. Are RGB colors created only by ...
stm's user avatar
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Is it possible to re-use a 7 inches TFT Display on Raspberry-Pi? [duplicate]

I'm trying to re-use a display I recovered from an old digital photo frame as a display for a Raspberry Pi. The display is a TFT 7" LCD with backlight, but it comes with a 26-pin flat cable for ...
Grohlfer's user avatar
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Have I configured the correct current supply for my TFT LCD Backlight?

I am currently working on a custom PCB which integrates a 3.5" TFT LCD. I am planning on driving the TFT backlight using a MIC4801 LED Driver and want to make sure I have configured the correct ...
henryv3's user avatar
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ST7735 driver IC connection with TFT DISPLAY

I am a noob to electronics and thinking of using this 128x160 1.8 inch Color TFT LCD Display with ST7735 Controller SPI in my project. So, does the TFT Display come with a pre-programmed ST7735 ...
Sukhdarshan Vinayak's user avatar
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Can I run my 3.5" TFT backlight off of a 3.3V supply?

I just wanted to confirm my thoughts on the selection of resistor value for a 3.5" TFT screen I am working with. The datasheet gives a forward voltage of 3.2 V and a forward current of 120 mA. ...
henryv3's user avatar
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How to connect 8-bit display to GPIO extender

I wanted to connect an 8-bit resistive touch display to a I2C GPIO extender which get's connected to a ESP-32, as seen in the picture The display has a lot of pins, and I really need to know if I ...
Tofan Simon Timotei Timothy's user avatar
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STM32F769I-DISCO - Really noisy TFT LCD display

I am a new user of an STM32F769I-DISCO MCU and the problem I'm having is with one of the examples called "BSP". I'm using the STM32CubeIDE to build and run the files. The program does build ...
lucky38's user avatar
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SPI pins in Winstar TFT display?

I'm trying to figure out SPI pins for Winstar WF32DSLAJDNN0 TFT display. The datasheet is not very clear on that. I think the right pins are as below, but would be great to get that confirmed before ...
tipo1000's user avatar
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Use the interal framebuffer of a display driver IC (here: ST7789V ) in RGB mode

I have an embedded RTOS system driving a display with ST7789V over uC's RGB565 interface. To save RAM, it would be nice to avoid the typical double buffering by having only one framebuffer in the uC ...
Philippos's user avatar
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How to increase the voltage for a TFT SPI ILI9486 powered via USB?

Hello everyone, I am new to the IoT field and have an ILI9486 SPI TFT display that can be powered between 3V and 5V. I am using pin A0, as shown in the provided schematic, to power the display using a ...
Melvin Debot's user avatar
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ILI9341 TFT display in XIAO ESP32 Seeeduino MISO issue

I am using a XIAO ESP32 Seeeduino with an ILI9341 TFT display that is working great. The touch screen is also working well. The problem is that I have to disconnect the MISO connection every time I ...
Bryan Medina's user avatar
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Screen for RasPi - scavenging from useless "tablet"?

I found an old WinCE machine with a completely useless platform - however the screen would be perfect for a Rapsberry project. Problem is: the sticker either does not have the real model number or ...
ppeterka's user avatar
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How can front- and backporch in TFT displays be inexact?

Today I had the question as to why front- and backporches in TFT displays can vary. There is this image (from https://www.youtube.com/watch?v=hnzhK5Vvvao) which shows the HSYNC, HBP, Active Width and ...
SkryptX's user avatar
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ST7789 LCD Driver Row Address Set Bug

I'm using a 320x240 LCD with a ST7789 driver in 8 bit parallel mode. I'm just getting things set up and am trying to draw a small square in the middle of the screen to make sure everything is working ...
Alex Jegers's user avatar
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TFT screen image being squashed and printed twice

I am getting into graphics programming and have come across an odd issue. I am using Microchip's Harmony + Legato platform on a PIC32MZ DA chip for a TFT screen that takes a 24-bit RGB format input ...
jakob's user avatar
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Interfacing TFT LCD Module with Arduino

I recently found a 3.5in QVGA TFT LCD module (Stellaris LaunchPad LCD Boosterpack EB-LM4F120-L35) which is meant to be a booster pack for the EK-LM4F120XL development board by TI. It is supposed to ...
Selasie's user avatar
2 votes
1 answer
7k views

How can I get higher fps with ESP32-CAM and ST7789 TFT LCD?

I have an ESP32-CAM AI Thinker board with an OV2640 image sensor and an ST7789 240x240 TFT LCD (SPI, but without a CS pin). I am trying to get a relatively good frame rate (30+ fps) on the TFT. I am ...
tinkertime's user avatar
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1 answer
160 views

TFT-LCD VCOM powered by LDO

Is it possible to generate VCOM voltage for TFT-LCD display by LDO? I am considering using MAX16929 for generating AVDD (9.6V), VGL (-6V), VGH (18V) and VDD (3.3V) for touch controller, but remaining ...
Misaz's user avatar
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STM32 C library for ILI9341 TFT LCD with 16-bit data bus?

I'm using FSMC with ILI9341 LCD and I have some troubles with the LCD. The LCD comes in lot of different sorts, but this one do I have. I'm using this library but the problem is that I get only two ...
euraad's user avatar
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What is the bare minimum number of pins needed to connect to an ILI9488 TFT in order to turn on the LED backlight?

I've bought one of these 3.5" TFT panels: and an accompanying 40-pin FPC-to-header adapter so that I can plug it into a breadboard (specifically, "ILI9488 no touch"). I've got a project ...
Dan Forever's user avatar
6 votes
2 answers
491 views

Is it possible to make an OFET in a home lab?

Is there a way to build an OFET at home? (low tech, no deep vacuum and plasma, without toxic/hard to dispose chemicals) What can be the minimum budget for that? While conductive polymers are pretty ...
Puh's user avatar
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253 views

How do I test TFT LCD?

I decided to make my own display that I can connect it to Raspberry pi or Jetson nano. so I've recently bought TFT 480x480 LCD with ST7701S and RGB interface. I think I'm providing valid signal, but ...
tmvkrpxl0's user avatar
1 vote
2 answers
668 views

Driving an LCD backlight using a PNP transistor

I'm trying to turn on/off the backlight of this LCD for the power saving when my ESP8266 goes to deep sleep. Because the ESP8266 has a maximum output current of 12mA and the LCD needs a current about ...
S.H.W's user avatar
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How data is sent to a raw TFT?

I have used TFT drivers before but now I want to challenge myself by connecting an FPGA to a raw TFT without a driver. I am having hard time understanding the basics of the signals : how RGB pins are ...
Aug's user avatar
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How do I get this to work 3.2 ”TFT 480x320?

Help please. I am using STM32F401CCU board to connect to 3.2 ”TFT 480x320. I can't get it to work, the display just glows white and nothing happens. [http://imgs.elgrad.net/Upload/sub-4/21450.pdf]2 ...
Валентин Штурм's user avatar
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368 views

CC2541 Interface with ST7789V based 1.14" TFT Display

I am working off a custom board having CC2541 from Texas as the Main Controller and a 1.14" TFT Display being controlled via ST7789V Drive IC. These two are connected over the SPI Interface. ...
Ash Ketchum's user avatar
1 vote
1 answer
217 views

Correct Wiring for Adafruit 2.2" TFT display w/ sd card

Apologies for a potentially frowned upon question, but Adafruit's documentation for the 2.2" TFT display with sd card breakout is a little lacking. Essentially, they describe the display and sd ...
Snappawapa's user avatar
5 votes
1 answer
5k 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:...
Cristian Pastro's user avatar
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1 answer
1k 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/...
Cristian Pastro's user avatar
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1 answer
134 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 ...
Brandon Kellett's user avatar
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1 answer
653 views

How to Identify my TFT LCD Driver Chip

This is one of my TFT LCD which I have no Technical details. How can I find which driver chip they have used? I have previously interfaced TFT based on RA8875 driver. So I Have a basic idea. I have ...
UB_Roy's user avatar
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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 ...
Lilguyuno's user avatar
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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 ...
Miguel Angel's user avatar
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1k views

Understanding how TFT driver operates (ILI9486)

I'm trying to understand how to interface TFT driver ILI9486. I'm doing this because I want to control TFT display with PIC microcontroller and not AVR (for which libraries already exist). I own the ...
lucenzo97's user avatar
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3 answers
544 views

How much current does the back light of ILI9341 LCD take?

I'm planning to do a turn-on-back-light construction with transistors like this: Where the LED is the back light of the LCD ILI9341. But to select the resistors, I need to find first how much current ...
euraad's user avatar
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0 votes
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46 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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Transform TFT to AMOLED

I was wondering if it is possible to transform a TFT LCD into an AMOLED as both are active matrixes. The composition seems to be similar. AMOLED TFT (LCD) And if it wouldn't be possible, could I at ...
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262 views

How is a TFT array made?

The more I get into TFT arrays, the more I'm lost. I know what it does, but how does it look like? Can you split a display and just hold a TFT? Can you buy a TFT on glass, without the rest of the ...
user avatar
1 vote
1 answer
536 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 ...
Adur's user avatar
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problem with using ili9341 TFT LCD with stm32f103RE

i successfully used a HAL code i found on Github for driving an ili9341 TFT LCD with SPI then I rewrote the code with registers. Part of my code works and i am able to fill pixels with color but when ...
salar1991's user avatar
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1 answer
203 views

Video format using LVDS signalling

I have a 3.1inch TFT. I have the below two pins Can someone tell me what does the 2 pins do? My questions : So, I can select either 6 bit or 8 bit for the whole communication and can't change in-...
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176 views

4DLCD display doesn't work with ESP32 via SPI

I have ESP32 custom made board and I cannot make it work with 4DLCD-35480320 (no touch) display via SPI. I triple checked all the wiring. Everything works except the display. I used Arduino IDE and ...
A_Ram's user avatar
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