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.

Filter by
Sorted by
Tagged with
0
votes
0answers
31 views

Suppressing Noise without Earthing

We have designed an HMI, which will contain a 10.1" TFT with PCAP touch panel. I am using an enclosed power supply to convert the 230V AC to 12V DC. Only DC positive and negative is connected to my ...
1
vote
1answer
60 views

What is wrong with this LCD backlight boost converter circuit

I have been working with a dev board with the LCD backlight circuit shown below. The boost converted used is the TPS61041. On page 18 of the datasheet, there is an example of the backlight circuit ...
1
vote
1answer
30 views

In LCD/LED displays, does the back light strobe or remain on?

In LCD/LED displays, like the ones used with computers or for watching TV channels. Does the back light strobe in sync with the refresh rate or does it remain on all the time?
0
votes
1answer
31 views

FFC 13 pin cable extension

I have this 13 pin FFC cable inside my Canon Typestar 5 thermal typewriter. It connects the LCD display to the main board. I'd like to pull the display outside the machine and for that I need an ...
0
votes
2answers
70 views

what kind (brand) of LCD display is this? it has no pins [duplicate]

I just gutted working new kitchen scale, and I have never seen a LCD display like this before. There are no pins just a black strip that goes on to the PCB. What brand of LCD is this?
0
votes
1answer
52 views

How do I configure the wires in the LVDS 30 pin cable?

I explain: I have a screen that I want to use as a monitor. I have purchased an LCD controller board and a LVDS cable I need someone to help me to rewire the LVDS cable. I have the input terminal pin ...
1
vote
0answers
57 views

40 pin signal with 50 pin LCD (AT070TN92)

I have a Lichee Pi Nano board with an Allwinner FC100s SOC. The board has a 40 pin LCD-connector which takes the signals from the SOC and the backlight voltage generated separately. I also have a ...
4
votes
2answers
181 views

Mitutoyo LCD repair [closed]

Never asked on stack Exchange before, and only have very basic knowledge in electronics (mechanical engineer by trade). Can anyone suggest if the LCD on this vernier caliper is repairable? One column ...
0
votes
0answers
32 views

What would cause streaking in graphics LCD display?

I am using a 128x64 graphic LCD module that uses either NJU6676 or ST7565P similar to this Zettler module. I am getting vertical streaks as pictured. They appear to be most pronounced when the topmost ...
0
votes
0answers
47 views

Random Number To LCD

i'm a newbie here. I'm trying to generate random number (1-6) and then have it displayed on lcd for PIC18F4550 using MikroC when switch 1 is pressed. After that, the number should be stored and ...
0
votes
0answers
40 views

Segment LCD only viewable at extreme angles

I have a kitchen scale with a segment LCD display. Starting one day, the LCD display is barely legible at all; sometimes the numbers are viewable from an extreme angle, sometimes not at all. Sometimes ...
0
votes
0answers
41 views

PocketBeagle with Midas I2C LCD

I am trying to get a Midas I2C LCD working with a PocketBeagle SBC Linux board. I have tried mainly three different configurations, but none of them seem to work. Connected it exactly as per the ...
0
votes
2answers
60 views

LCD Glass driving waveform

I'm currently trying to figure out how to drive a bare 7-segment 4-digit LCD glass (without driver). Part number of display: VI-415-DP-RC-S I’m currently planning to apply a (min.) 30 Hz square wave ...
0
votes
1answer
55 views

Screen with built-in NFC

So I've started working on a small project (small at the moment) and I'm seeing some issues in my prototype plans, and I need your help with this. Short answer: I need a led touchscreen with NFC ...
0
votes
1answer
41 views

Read serial data from unknown source using Raspberry pi

I have a fuel dispenser, which has one keypad and two displays, each display has three of 7 segment LCDs. I want to control the fuel dispenser with a PC or a phone. The way to do this in my knowledge ...
0
votes
2answers
116 views

Controlling 24-bit parallel RGB LCD with 16 bits

I'd like to run a 24-bit parallel RGB LCD with 16 bits using the LTDC controller of a STM32F469ZGT6. The screen won't be displaying video or anything too intense, but there will be some anti-aliased ...
0
votes
2answers
63 views

I don't know whether HD44780 LCD is correctly initialized in Proteus

I'm trying to control an HD44780-based LCD in Proteus with 4-bit interface. The problem is that the simulation log gives me a series of messages, which I think means that I'm not sending the commands ...
0
votes
0answers
23 views

STM32F746 - FramEvent coming once in 10sec with ADV7180

ADV7180 Video decoder is connected to STM32F746. I am running ADV7180 in Free run mode with blue screen. In STM32 I have initialized Camera and Started with CONTINUES Mode. I am getting Line ...
0
votes
0answers
38 views

Universal LVDS controller board

I am trying to salvage a Chimei Innolux V236BJ1 LE1 panel from an old LG TV. Planning to use T.RD8503.03 but I can't find the datasheet. I need it to see if the pinout are compatible, or if not, to ...
0
votes
0answers
40 views

Fixing damaged flex cable in LCD display

I have salvaged an LP154WX4 LCD display from an old laptop, and I've bought a controller board on Amazon. After hooking it up, I've noticed a few vertical lines on the screen: thinking it was an issue ...
0
votes
0answers
43 views

Can I run I2C devices in ISP pins?

I am trying to build an IR thermometer using an Arduino Nano, a I2C LCD and a I2C infrared sensor(MLX90614). my problem is that my Nano board only has 1 option for I2C ports which I am planing to use ...
1
vote
0answers
84 views

Write received character from PS/2 keyboard to LCD1602

I am trying to read a pressed key from a PS/2 keyboard and display it on a LCD1602 display. I wrote one entity and architecture which detects a pressed key. If it received the 11 bits (1 start bit, 8 ...
2
votes
0answers
77 views

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 (...
0
votes
0answers
47 views

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 ? ...
4
votes
1answer
568 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 ...
0
votes
1answer
52 views

.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 ...
0
votes
2answers
128 views

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 ...
2
votes
2answers
59 views

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 ...
0
votes
1answer
44 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 ...
0
votes
1answer
58 views

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)...
0
votes
1answer
47 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 ...
0
votes
1answer
84 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 ...
0
votes
2answers
54 views

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 ...
0
votes
1answer
106 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?
0
votes
3answers
74 views

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 ...
1
vote
0answers
33 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 ...
1
vote
1answer
69 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 ...
0
votes
0answers
25 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 ...
0
votes
1answer
84 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 ...
0
votes
0answers
68 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'...
1
vote
0answers
148 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 ...
0
votes
1answer
87 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 ...
1
vote
0answers
51 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 ...
0
votes
2answers
314 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, ...
1
vote
0answers
110 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 ...
0
votes
1answer
86 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 ...
1
vote
0answers
69 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 ...
1
vote
0answers
657 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 ...
0
votes
1answer
85 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 ...
0
votes
2answers
362 views

ILI9486 Display Init FSMC

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

1 2 3 4 5 15