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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LCD Gasket Causes Touchscreen Issues

I'm having an issue with a touchscreen LCD assembly. The touchscreen normally works fine, but if I mount it in a housing with a gasket the taps sometimes register in the wrong location. The ...
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1answer
126 views
+50

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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2answers
229 views

Why do we need sync pulses in digital (LCD driving) context?

I am studying how to drive LCD TFT display with the microcontroller (STM32F746). The manual mentions that I have to set up timings for HSYNC, VSYNC, VBP (Vertical Back Porch), VFP (Vertical Front ...
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6answers
22k views

Why are LCD panels polarized at 45 degrees?

I understand the principle of operation of LCD panels, but I am wondering why the specific output angle of polarization was chosen over, say, horizontal or vertical.
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31 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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0answers
27 views

Conveyor motor switching causes arduino freeze and display out fromLCD [on hold]

My arduino Mega hang and 16x4 LCD display just vanishes almost every time I turn on conveyor motor (Sometime weird characters start coming on display). I have to reset my arduino . There are total of ...
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2answers
189 views

HTN LCD - Ghosting Problem

I am driving a large, complex HTN LCD with 3 Holtek HT1625 LCD drivers. There are over 700 segments. The data sheet for HT1625 LCD driver is here: http://www.holtek.com.tw/documents/10179/116706/...
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0answers
63 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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1answer
144 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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22 views

uc1609 LCD driver

How to connect LCD Display HEM19264-05 with UC1609C LCD driver to stm32l476g-disco? I'm confused by the UC1609C. I could not find any datasheet on UC1609C. There are unusual pins. I found just pinout ...
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0answers
49 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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1answer
130 views

Arduino Interfacing Breadboard with SD Card + Shift Register

I have a small circuit, and use a shift register (74HC595) to help add output ports to drive an LCD display. As far as I have found, the latch pin can be connected to any digital pin, and I have it ...
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59 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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1answer
198 views

XV0 and V0 - what does it stand for?

I'm looking for suitable GLCD, so far I have found the RX12864H, however the datasheet describes a lot of voltages and I'm bit confused. While the VSS and VDD are clear to me, I have no clue what do ...
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1answer
92 views

How to design a GUI using GLCD?

I have a small project that I'm working on. It has a NOKIA 5110 LCD. I want to make a nice GUI to view measurements, and also control the hardware. I've designed tow screen layouts which you can see ...
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1answer
48 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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0answers
33 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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2answers
5k views

Standard text LCD menu system

Is there a pattern out there for a simple menu system in C for a text LCD. I find myself re-writing code a lot for handling simple text LCD menus. I find most systems have a main menu and some sub-...
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1answer
60 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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1answer
75 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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1answer
68 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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2answers
109 views

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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1answer
437 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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5answers
3k views

Why not use monochrome LCDs instead of E-ink?

Recently I've been reading about E-ink displays and the benefit over LCDs, as I understand it, is that there is no backlight in E-ink displays and thus, physical light is reflected, making reading ...
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1answer
101 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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2answers
501 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
31 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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1answer
92 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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2answers
54 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
1k 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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1answer
237 views

Displaying image on Tianma LCD + Controller Board

I want to wire up this board but I don't think I have the proper equipment for it. It's a Tianma LCD with a controller board that is displayed below. It's TM035KDH03. Here's what it comes with: Need ...
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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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3answers
817 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
461 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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0answers
85 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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1answer
103 views

Display input from multimeter on PC

I have opened a Multimeter (Model:DT830D) and I want to take the input that is fed to the LCD display and display it on my PC instead using the serial monitor of the arduino. But I am confused about ...
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2answers
93 views

Max amps/volts for a 7 Segment LCD

I recently bought this LCD screen for a project: https://www.jaycar.com.au/4-digit-field-effect-lcd/p/ZD1886 This LCD screen is just for testing at the moment, the final project will use these (I ...
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2answers
69 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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0answers
26 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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0answers
29 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
131 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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1answer
150 views

LVDS display troubleshooting

I am currently working on a prototype connecting a SOC-board (Samsung ARTIK530) to a LVDS LCD display (DT070BTFT-PTS1). The display shows a very (!) distorted picture. I have tried fixing it using ...
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1answer
65 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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2answers
51 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
20 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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1answer
1k views

Power sequencing requirement for LCD

I am using LCD with below power interface. But as per below note in LCD datasheet, VCC and VGL need to apply first and then VGH. My query is why such power sequencing is needed ? If I use below ...
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1answer
46 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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1answer
158 views

Is this ST7735 based LCD module broken? (Photo: random color pixels on the entire screen)

I have been testing my LCD module. I think it is burnt, although I hope not.... Can anyone confirm that I just badly programmed? I try to send a pixel(green, red, black whatever the color is) to the ...
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3answers
845 views

Does anyone have a datasheet for this Arira LCD?

I emailed the manufacturer but they haven't responded to my email. I received this LCD screen in a grab bag from Jameco. Googled for a while and couldn't find anything related to the pinouts of this ...
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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 ...