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Questions tagged [lcd]

Short for Liquid Crystal Display. LCDs consume little power, and exist in graphic LCDs, or segmented. The latter type is used for character and 7-segment digit display, and also in custom LCDs for consumer electronics.

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24 views

Samsung mobile LCD reverse engineering [on hold]

I salvaged a LCD display from an old Samsung. It's from GT-s3310. I can't find any datasheet on internet. There are few things I managed to find out. NUMBERINGS AND MARKINGS The display says it's ...
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Calculating LCD display horizontal and vertical porch values

How should I set the porch and sync values given an LCD display? For example, say my FHD (1920x1080) display datasheet says its has a total vertical cycle of 1125. I have 45 clocks remaining (...
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Segmented LCD Driver HT1622/HT1621 interface type unclear

I've been leaning working on using and interfacing a microcontroller with an HT1622 + a custom segmented LCD. IMO the datasheet of the IC is very small and left me confused ; is the interface SPI ? ...
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560 views

TFT LCD Tear-down Silver Rectangle Question

I was tearing down a TFT LCD from a medical device (ultrasound bone healer) for fun and did not understand the function of a component. It's a silver rectangle that sits between the LCD and the ACF ...
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.96 inch TFT with ST7753 and AVR - can't draw individual pixels

I bought this from aliexpress: https://www.aliexpress.com/item/32859042892.html It seems to be a good display, even a bit higher res, than advertised, however, I'm having trouble doing anything more ...
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Looking for a way to re-program 16x2 LCD display EEPROM font

Some time ago I've seen this topic - asking where does the fonts stored in 16x2 (1602) LCD display. Does a 16x2 LCD display has its own EEPROM? I'm really interested in this, and didn't find any ...
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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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35 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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1602a LCD - Voltage drops to zero when both VSS and VDD are connected

I'm currently trying to connect a 1602a LCD screen to an ATMega328P MCU: As you can see, I use an Arduino Uno for power supply and as ISP. However, when I connect both the first (VSS) and second (VDD)...
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45 views

Problem Powering 13.3 inch LCD Screen with 3.7v Battery [closed]

I have been working on a project that involves running a 13.3 inch lcd screen off of a rechargeable battery. I bought the lcd screen and controller board listed below and verified that it was working ...
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73 views

Do front and back porches for digtal video really matter?

I am developing an LCD controller, and some of the code for my (third-party) timing generator includes horizontal and vertical front/back porch and vsync/hsync pulse time information for a different ...
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8051 LCD interfacing works in Proteous but doesn't work in hardware

I'm working on this project using an 8051 micro controller (AT89S51) and it involves interfacting with an LCD. The schematic of the project I'm working on is shown below: And I've written a very ...
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56 views

Make LCD reflective

If I don't care about dim light or darkness, can I make an LCD-display sunlight readable by removing it's backlight and replace it by a mirroring surface, followed by a diffusor?
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lcd 16x2 replacement and or interchangeability

I need to replace a 16x2 LCD on a salt chlorinator display. I searched the part number (GX1602KP) but can't find it. I see alot of 16x2 lcd displays which look similar - are these lcd's ...
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LCD Dimmer with Variable Resistance Circuit

essentially I'm trying to make a very basic circuit where a 3.7 volt battery is wired to a liquid crystal display, (or LCD), and the brightness of said display is controlled by a pentiometer to ...
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61 views

What receiver is appropriate for studying compromising emanations in 2019?

I'm currently reading the Cambridge Technical Report Number 577, Compromising emanations: eavesdropping risks of computer displays, by Markus G. Kuhn and published in Dec 2003. In the paper, Kuhn uses ...
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LCD for SLA 3D Printer Resin Curing

I'm doing some research on what types of LCD displays can be used to filter and pass UV light for resin curing - specifically in the context of building a DIY 3D SLA printer. The community commonly ...
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82 views

What happens when an LCD screen turns black/shuts off? [closed]

I read about how an LCD screen works here, and it made me wonder what actually happens when the screen shuts off. Based off of this, I can think of several possibilities: Electricity is supplied to ...
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Configuring the clock and LTCD stm32f7

I'm interfacing an LCD using LTDC. That LCD has a touch sensor that works for 400KHz. The touch sensor is interfaced using I2C. My problem is how to configure the clock for both to work. Right now I'...
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Nema17/A4988 + LED display pump, 5v circuit not complete?

I'm trying to build a pump from Instructables, with no experience at all. I appear to be pretty close but the 5V line from the Arduino does not power the driver or LCD screen via my perfboard, it ...
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53 views

Fastest LCD data throughput 8080 or SPI

I recently ordered a 128x128 graphic black/white display with a ST7541 chip-on-glass. It took me 2,5 days debugging and frustration to discover that they didn't wire SPI through the flatcable. A big ...
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27 views

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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133 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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Applying a 1/3 bias to an LCD display spec'd at 1/2 still safe?

We're currently using an MSP430 with an integrated LCD controller that only has a 1/3 bias mode. The LCD display has a 2-mux configuration and the data sheet specifies "drive method: 1/2 duty, 1/2 ...
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39 views

Correct Initialization Routine for LCD Panel (HX8357D)

I have acquired a color 320x480 TFT LCD display based on a HX8357D driver. It is an Adafruit 3.5" Touchpanel display. I would like to use it for one of my projects based on Rust. Currently, there ...
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52 views

Reverse engineering LCD signals on HP power supply

I have recently acquired an HP 6632A power supply and was inspired by Roberto Barrios' project of replacing the screen with an OLED display to do the same. However, it is evident that the 6632A is ...
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150 views

Connecting 21" screen to LVDS connector on motherboard

I'm working in an "All-in-One pc" project. For that, I have an old Dell laptop (which only works with DC adapter) and a 21" LG monitor. My question is: How can I connect the LCD panel directly on the ...
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64 views

LCD Gasket Causes Touchscreen Issues

Edit: Pretty much all conjectures in my question have been proved to be incorrect. I started fresh with a new approach. New question is here. Original question: I'm having an issue with a ...
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141 views

ILI9486 Display Init FSMC

I have ILI9486 based tft display to initiate via 16bit FSMC. I did gpio, fsmc, and lcd initialization. ...
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1answer
189 views

Build In Self Test LCD

I've recently been trying to get a custom LCD (ET101005DSAK0) connected to an Embedded System on Module however without any success. When debugging why the LCD is not working I wanted to make use of ...
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82 views

Do carbon resistors not follow tolerance as they age?

I'm trying to figure out the problem with my LCD and resistors. The micro I'm using is AT89S52 and the LCD is a standard display based on the HD44780 chipset. Part of the code in my micro allows for ...
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51 views

Unable to find data sheet for MAX8918ITM

I am quite new to electronics, so I apologise for the inevitable mass of stupidity in this question. I am trying to find the data sheet for the LCD driver MAX8918ITM, from a Nikon COOLPIX L110, and it ...
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64 views

Custom LCD display design considerations

I'm in the early stages of designing a device that will have a custom, backlit LCD display and an injection molded case. I've never worked with a custom LCD display, and have not yet spoken with any ...
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35 views

Reusing LCD and precision balance components

For some time now I have been setting up a quality control system, which has started with a basic weighing system, which connects to a database and sends the information, and will end, I hope, with a ...
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1answer
61 views

Why are there air(?) bubbles within my LCD? [closed]

Photos: https://photos.app.goo.gl/BvqLVYkMBB7RjaMU7 (Nexus 9 Android tablet) My daughter's tablet is enclosed in a full-body case, so it's fairly well protected. Still, somehow, at some point I ...
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80 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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68 views

STM32F746 Nucleo with FMC LCD

I am configuring a new LCD screen with parallel 8080 protocol (screen controller is SSD1351). I am using ST CubeMX to generate code for FMC (attached picture of the configuration). My problem is that ...
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80 views

Pin out clarification, I need some help understanding the pin outs

What do the pins "/CS", "SCK", and "SDI" mean? From my bad understanding of this diagram, I only have to run 3.3V to "/CS", "SCK", and "SDI". Is this true or am I way off? Let me know in the ...
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LCD display is garbled in between operations on STM32

I'm using a 16x2 LCD for a project on STM32F030R8. I wrote a library for interfacing and everything was working fine until recently. It displays garbled junk values in between operations, especially ...
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181 views

Which part of some LED TV screens acts as two gratings crossed at non-straight angle?

Some modern LED TVs display the following diffraction pattern (photos taken from this question): In my answer to another question about the origin of this pattern I explained that this should be due ...
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Not getting reading back from HC-SR04 with PIC18F45k50 MCU

Hello I'm trying to measure the distance with HC-SRO4 ultrasound sensor PIC18F45k50 micro-controller however, I'm not reading any value on the LCD screen. Here is the following code that I have ...
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147 views

LCD 16x4 is shifting the columns of the third and fourth lines

I'm using the PIC 18F4550 to write to an LCD 16x4. I used MikroC Pro for PIC to write the code and the Proteus to simulate. I'm using the library Lcd and Lcd_Constants already present on the ...
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64 views

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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1answer
49 views

LCD suddenly stops displaying

I am using a PC2002LRU-BWB-H-Q LCD with a STM32F4 micro and is powered through a TMP10424. There is also some 3V3 and 5V modules to. The problem is that the LCD is displayed fine for over days and ...
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74 views

LCD Display behaving weird with STM32 [closed]

16x2 LCD operating in 4-bit mode. At first, I tried initializing the LCD in 4-bit mode using software. Did not work. After repeated tries however, LCD started working. But for some reason I had to ...
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Need to find out one “a-Si TFTLCD” driver

I need to work with one 5" TFT LCD working with STM32 MCU, So I find out one 5 inch TFT LCD wich in seller website don't have written anything about isn't the driver. The LCD specification in web ...
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37 views

Help identifying LCD

I have an LCD from some farming equipment that I need to replace as it is not working but I am having trouble identifying a potential replacement part. I have tried googling part numbers but with no ...
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69 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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170 views

L293D DC motor affecting LCD display

In the circuit below, I have noticed that when the DC motor (12V) is disconnected, everything works nice. The LCD correctly displays what arduino sends to it. But ...
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96 views

voltage levels for lcd display

i intend to use WF101FSYAPLNGO display model of winstar, in its data sheet AVDD, VGH,VGL VDD, VDDT voltages are given, can some one help to find the difference between AVDD and VDD, is AVDD meant for ...