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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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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1answer
158 views

Do you need initialization when sending raw RGB data to a ILI9341 based LCD?

The title pretty much says it all. Can I just send RGB data according to the protocol or I need some init before that to make it work?
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963 views

Why multiple bias voltages are required to drive LCD?

I have read this document: AN658 - LCD Fundamentals and the LCD Driver Module of 8-Bit PIC® Microcontrollers I understand that the main concern is to maintain 0 Vdc bias on every pixel when driving ...
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3answers
840 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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0answers
79 views

Please don't use odd horizontal lines to drive LCD for both odd and even fields simultaneously?

Here's a datasheet for a small TFT LCD panel. http://www.yc-dz.com/productimages/05334956.pdf On page 7 (9th page of the PDF) there's a tabulated spec for tV, "Horizontal lines per field" (Min: 256, ...
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165 views

Text LCD doesn't function normally on mixed-signal PCB?

I have power supply, analog part and microcontroller part on one 2-layer PCB board, very simple. The LCD is on the microcontroller part. It works normally when I have it on a separate board with only ...
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0answers
619 views

How to set the gamma?

I have a TFT 2.2 inch Display. like this: Its controller is ILI9341. I ported it to my MCU and everythings work fine. one of the most important things in using a display is Gamma. when you would use ...
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0answers
28 views

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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0answers
48 views

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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0answers
20 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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47 views

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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48 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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74 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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1answer
68 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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46 views

How Backlit LCD Moniter Works, How it Looks Without a Backlight

I'm thinking about repurposing an lcd backlit monitor's front panel as an 'overlay' type panel over something else without a backlight. My understanding of the function of a backlit monitor that the ...
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0answers
56 views

LCD panels used in projectors - What are their limitations?

It's important I point out immediately that I am an absolute novice at all this. I am trying to self-teach myself the basics by building things but it is a slow slow process. So please bear with me if ...
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2answers
545 views

Horizontal offset with generic SSD1306 OLED display

I bought a generic OLED 128x64 display on ebay and had some success in getting it running with the Adafruit SSD1306 library. I ported the initialization function to C and am driving the LCD using the ...
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0answers
262 views

Sometimes LCD display is initialized half white

Rarely right after the startup my LCD display shows half the screen completely white, the other half shows the software without problems. The main problem here is that to see this problem I have to ...
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0answers
81 views

Segmented LCD — Voltage Sag Solutions

I've got a remote control transmitter, with a segmented LCD display. The MCU has an integrated LCD driver that is driving the display. I've got the MCU interfacing and working with the LCD. The LCD ...
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0answers
898 views

Connect STM32 FSMC to LCM with 6800 interface

I want to use STM32 to drive a LCM with a KS0108 controller. Sadly, it has a 6800 interface. Fortunately, ST gives a document: TFT LCD interfacing with the high-density STM32F10xxx FSMC . In p. 12 it ...
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0answers
2k views

LCD driver board M.NT68676.2 issue: Screen compressed, fills only part of display

I am trying to build a portable Raspberry Pi/Retropie system with an LCD screen I got from my old laptop (the idea is to have a portable gaming console to be used in a car). To drive the screen, I am ...
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0answers
81 views

16x2 Charater display for outdoor use

I currently have a project installed in an outdoor location. It currently uses a 16x2 blue OLED display for simple messages to the user. Over the past 4 years I have had to replace the display ...
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0answers
36 views

Powering 5" display with LiPo batteries

I'm using a 4DSystem 5" display with Arduino MEGA 2560. Normally Arduino is powered through a wall power supply but, in some conditions, I need to power the Arduino + LCD with batteries (for not more ...
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0answers
337 views

16x2 LCD Display Got Error Cause by External Current

As shown in the image above the 16x2 LCD display is controlled by Arduino. Relay and LCD both connected to +5V of Arduino The LCD got an erroneous symbols display whenever I pug/unplug the relay to ...
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139 views

Beaglebone black + serial enabled LCD

I'm trying to interface a SparkFun Serial Enabled 16x2 LCD (3.3V) to a Beaglebone Black. Since the beagleboard has on-board 3.3v and ground, I used that for the power to the LCD. For the 3.3v TTL ...
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0answers
383 views

Can't display on LCD with Atmega 328

I tried to display hello world on a 20x4 LCD using Atmega328. But I failed to display any character on the screen. I'm not sure where the problem is, either the initialization or the timing order. I ...
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0answers
3k views

Controlling LCD with MSP430 via I2C backpack PCF8574

I'm at my wits end with this at the moment. I need to interface my MSP430G2553 with the PCF8574 I2C expander in order to drive an LCD display. So far I've had not much luck at all. There is very ...
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0answers
657 views

LCD screen with a dark patch, hot, hissing and whole screen flickering: what is happening exactly?

I've just had a problem with an LCD monitor, but this question is not about solving this problem. Google did that. I want to know what is happening at the electronic and physical level. Google didn't ...
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0answers
263 views

Remote control of audio equipment over RS-232 with Arduino

These questions are following on from my previous question Reverse engineering old serial devices and cloning with Arduino about the monitoring of RS-232 traffic. I had some good success and now have ...
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0answers
240 views

Video streaming from image processor

The project I'm working on involves streaming video from an image sensor to an LCD, preferably as cheaply as possible. My question is: can I get an image processor/sensor SOC (a la https://www.aptina....
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1answer
440 views

Help identifying this LCD module

I am looking to identify the LCD module pictured below and find a datasheet for it, or otherwise determine the pinout and figure out how to properly drive it. Front The lines of text on the ribbon ...
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0answers
1k views

16 x 2 LCD not displaying analog inputs fed to ATmega168

I am experiencing some problems getting a display of analog inputs(current and voltage) fed to ATmega168's A0 and A1 respectively. I believe the wiring and the program are correct since the same ...
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0answers
951 views

OLED Custom Character not being displayed correctly on Arduino Uno? Too Many?

So I have a bunch of custom characters and they are created like this ...
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0answers
22 views

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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25 views

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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2answers
54 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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1answer
72 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
179 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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0answers
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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0answers
62 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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0answers
34 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
74 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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0answers
36 views

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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0answers
28 views

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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30 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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2answers
59 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 ...
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0answers
152 views

connecting 6 bit 1 channel LVDS LCD to 6 bit 2 channel or 8 bit 1 channel LCD Universal Driver

I had an old laptop LCD screen with part number N154I2-L05 . It has 6 bit 1 channel LVDS connector input slot. so I have decided to use it instead of letting covered in dust, and I ordered an ...
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0answers
23 views

NodeMCU with JHD162A Lcd module display issue

I have uploaded a program to NodeMCU, to print "hello, world" on JHD162A 16x2 LCD module. But the text doesn't appear on the LCD display. Instead just black blocks appear on the first row on the LCD. ...
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0answers
39 views

Changing flex connector on LCD motherboard

The flex connector from a Philips 236v4lhab motherboard has some of its pins broken. They are touching each other (8,9,10). Can't show it on the photo but have tested with the voltmeter. I'm wondering ...
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35 views

LCD Counter and Hour Meter

In an electronic board I've found an LCD Counter and Hour Meter. Here's the technical information. https://docs-emea.rs-online.com/webdocs/001a/0900766b8001abd9.pdf Since it's very expensive, I ...