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
-1
votes
1answer
800 views

Partially broken LCD missing segments [closed]

This cordless phone just started not showing some of the segments of the display (here it should show NS AMERICA). I thought those segments were just broken, however sometimes they are all working ...
0
votes
1answer
96 views

Checking my understanding of this datasheet of a TFT LCD display?

I'm trying to modify an HDMI decoder board by Adafruit(https://learn.adafruit.com/adafruit-tfp401-hdmi-slash-dvi-decoder-to-40-pin-ttl-display/downloads) to work with an IPS screen that has a 51 pin ...
0
votes
1answer
97 views

Doubts about replacing an LCD display [closed]

I have a device with a lcd (1602) that needs to be replaced but I'm not sure about finding a compatible one. The part number is BC-1602B-SBYA-I-B-A00 and according to the specification pdf it has an ...
0
votes
1answer
54 views

Can the TFT in LCD displays be made in the nanometer range?

Can the TFT elements and hence the pixels in an LCD display be made in the nanometer range? Say 10nm x 10nm?
-1
votes
1answer
102 views

Does a 16x2 LCD display has its own EEPROM?

I want to know the "internal parts of an LCD"... but I can't find any from the results. https://youtu.be/dZZynJLmTn8?t=2m40s @2:40s "....according to the ASCII" does that mean ASCII is stored ...
0
votes
1answer
245 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 ...
0
votes
0answers
1k views

AMOLED display vs. LCD display: Power consumption when displaying white only?

LCD's power consumption only depends on the screen brightness setting, not on the displayed content, unlike AMOLED, where brighter colours (towards white) cause more power consumption, while black ...
0
votes
1answer
206 views

What is the difference between MCU and TTL screens? [closed]

I'm trying to build a HDMI decoder board for a 4in 480x800 IPS display. I found an HDMI decoder board on adafruit(https://www.adafruit.com/product/2218) which says it works for most 40pin TTL displays....
0
votes
1answer
72 views

Display Driver for a SHARP LS020B1DD01D LCD [closed]

I am working on a personal project that will feature an LCD panel and push buttons to control the graphical user interface. For the LCD I would like to use the SHARP LS020B1DD01D (for the ...
0
votes
0answers
42 views

Interfacing NT7605-based LCD with MSP430

I've spent the last week or two trying to get my MSP430 to communicate with an NT7605-based LCD. I found this post with a very similar problem: Debugging initialization of LCD with NT7605 driver I'...
1
vote
0answers
58 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 ...
0
votes
0answers
2k views

Terminology - VDD vs VSS?

What is the correct voltage terminology for VDD and VSS? I've been installing a Winstar WEH001602D OLED and was struggling until I realised that it appears to have pins 1 and 2 reversed compared to ...
0
votes
0answers
13 views

Segmented Display With SMD Pads? (Not Thru-Hole or Half-hole SMD) [duplicate]

I'm looking through a product design, and I've seen these SMD / sticky segmented displays LCD being used. They are not hand-soldered, the segmented display appears to use some conductive sticky pad ...
2
votes
1answer
260 views

So there was an ant that somehow got inside my screen. How do I remove it? [closed]

Wondering if it's possible to remove the LCD screen without damaging it. I noticed there are six black metal thingys at the back of the module that is twisted up holding the LCD in-place, is it safe ...
1
vote
2answers
252 views

ssd1306 registers

I got confusion while reading datasheet of the OLED display(128x64).I do not understand why to use two column start registers. https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
1
vote
2answers
386 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 ...
5
votes
1answer
155 views

How do LCD screens repair themselves?

Hey, electronics people: A few months ago, I cleaned a spot on an LCD flat screen. Whatever it was, it was stuck on there pretty good and I guess I pushed down on it too hard (actually wasn't hard at ...
0
votes
1answer
115 views

LCD SPLC780D Initialization sequence fails

Microcontroller model : PIC32MX340F512H LCD controller : SPLC780D LCD module : MC42005A6W-FPTLW3-V2 (20*4) I have been struggling for two weeks to get a SPL780D based LCD module to work. I checked ...
0
votes
1answer
295 views

How generate a square wave from a DC voltage to power on LCD crystals?

I got a small LCD and I would like to power it to show the LCD crystals turning to black. I would like to show at which voltage the LCD crystals start to turn black. I did some research about LCD ...
0
votes
1answer
88 views

Debugging initialization of LCD with S6D05A1 driver

I'm trying to get this 320 x 480 LCD going through SPI (4 wire 8bit) for a while now but no luck. It seems like the resolution is not defined as should during init but I can't see how. Here what I ...
0
votes
2answers
452 views

Connecting LCD Display with I2C USB Connector

I have a qapass 1602a LCD display connected to an I2C 1602 LCD Controller which is connected to a UMFT201XB I2C USB Connector which is connected to a linux box. My Question is: How and where do I get ...
1
vote
1answer
51 views

How to discover LCD controller model

I'm trying to read a graphic LCD, it seems to have 128 x 64 dots. It communicates with an ARM STM32F103 via SPI. I intercepted the communication between the LCD module and MCU, and decoded part of the ...
0
votes
0answers
57 views

LCD default boxes not showing when contrast pin is hooked to old-fashioned regulator circuit

I have an HD44780 compatible character LCD display (2 rows 16 characters a row) powered with 5v through a regulator (4.97V according to voltmeter). If I connect a 2.2K resistor between the LCD ...
1
vote
1answer
173 views

Learning the Art of Electronics - LCD

The digital chapters of LAoE require a custom display with added functionality that is not sold in the UK (details on the LAoE website at the link below). Do you have any ideas for an alternative ...
1
vote
2answers
629 views

Using old laptop LCD as external VGA screen [closed]

I have a few old laptops with good LCD panels that I wish to salvage and use as external VGA screen on other computers. I'am no expert in electronics but I work with computers and know the basics of ...
2
votes
2answers
158 views

Measure High Dc Voltages 0-150V using a STM32F446RE MCU

Does anyone have any suggestion on how to build a circuit that can convert high Dc voltages from 0-150 V to lower voltages so that I can use my MCU to read them and display them on my 16x2 LCD?. I ...
0
votes
1answer
59 views

Interface TFT LCD with PC

So I have this LCD lying around, and I was wondering, is there any way to interface it with a PC? Be it USB, HDMI, VGA, planning to use an old PC with it. I don't need to use the touch controller, ...
0
votes
1answer
187 views

Interfacing microcontroller ,LCD and two push buttons

Problem : I'm using PIC16F84A as microcontroller , wh1602a (LCD) [16x2] , and two push buttons. I want to give the user two options say option 1 and option 2 on the display and the user presses one ...
5
votes
2answers
640 views

How exactly is an LCD damaged by DC current?

LCD displays are driven by AC waveforms. I've seen many references referring to permanently damaging them with DC current. When exposed to DC, LCD's fail and conduct excessive current. My question is: ...
0
votes
1answer
544 views

Backlight dimming Innolux at065tn14 with vs-ty2662-v1 (PCB800099) LCD driver board

I would like to dim an Innolux at065tn14 LCD backlight via an PWM signal generated by an arduino pro mini. The driver board has an pt4103 Step-Up Converter to drive the backlight of the LCD display. I'...
3
votes
1answer
99 views

How does the “rubbed” coating of an LCD align liquid crystal molecules?

For many LCD applications the liquid crystal layer's relaxed state is a "helix" twisting the alignment from one direction at top to another on the bottom. Obviously, within the liquid crystal layer ...
0
votes
1answer
539 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 ...
0
votes
1answer
64 views

How to transfer raw video data from a device to a computer using royalty free wired connection?

I have RGB video data captured from an LCD and I would like to send it over to a computer for capturing however it seems all video connectors require a significant investment if one intends to use ...
2
votes
1answer
175 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?
0
votes
1answer
96 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 ...
1
vote
2answers
145 views

How can I drive this LCD? [closed]

I have had this LCD lying on my shelf for the past few years and have not been able to figure out how to use it. It is an LCD from the printer Epson TX710W. I searched for a datasheet, but I couldn't ...
0
votes
1answer
67 views

ARM LCD driver internal workings

I want to use LCD driver pins to light up LEDs instead of using LCD screen. This is done on a broken device so altering other pins is not possible for this case. Is this safe to CPU to connect just ...
6
votes
5answers
2k views

Is it possible to drive a 2 X 16 LCD display using logic gates? (Without computer)

I want to make a circuit using logic gates that prints a message on the LCD display (2 X 16). Any idea? I want to know how to do this "by hand". like the old days. Can I build a circuit out of ...
0
votes
1answer
50 views

Name of the “object” next to an LCD [duplicate]

I opened up a remote I had and saw there were two soft "objects" next to the display in it. What is it's name and function?
0
votes
3answers
375 views

For a STM32, can I use a quad SPI and SD card as a framebuffer for a LTDC LCD driver?

I'm using STM32F756 The SD card is 20 MHz and I know the performance would suck for an 800 x 480 display, but will the hardware do it? Or is RAM the only medium required? I screwed up, have no ...
-1
votes
1answer
94 views

LCD 2*16 custom characters

I need to write custom characters in LCD 2*16. I use CGRAM to make custom characters but as far as I know, I can't write more than 8 custom characters at a time (please tell me if I'm wrong). I'm ...
0
votes
1answer
471 views

ILI9488 LCD Parallel Bus Interfacing?

I have this 3.5" LCD with a ILI9488 COG driver IC, it supports both serial & parallel interfaces but using SPI I can only get very slow frame rates. The end application will be translating a ...
0
votes
1answer
68 views

How to work out the interface of an LCD?

If I got an LCD, and I didn't know anything about it, and there were no markings on the pins, how would I go about interfacing with it? For example, I got this small (around 2.5") colour display out ...
0
votes
1answer
75 views

constant character darkness on lcd even in low battery

At this time I have an lcd where I hook up a 1k resistor between contrast and ground. As the battery voltage drops, the text on the screen also fades. I could make a manual switch and switch between ...
-2
votes
1answer
100 views

Connecting multiple 1inch lcd displays to only one MCU

i'd need to connect multiple very small (1inch if not slightly more) square lcd displays to only one controller unit. I searched for it but being not an electrical engineer it seems i lack some ...
-1
votes
1answer
949 views

Can I use an arduino as a LCD controller?

I saw this video where a person used a graphical LCD as a very rudimentary monitor for his computer using an Arduino... I was wondering whether it is possible to use an Arduino as a controller board ...
-1
votes
2answers
81 views

SMT Chinese display questions [closed]

I am trying to underestand a chinese digital timer. So well, there are some things that are not shown on textbooks. When I search about LCD screens i can't find anything related to this display: I ...
0
votes
1answer
243 views

Is it possible for someone to build a linux embedded board at home? [closed]

I am wondering if it is possible to build an embedded linux board at home that has basic features like USB , serial and linux support but is powerfull enough to drive an LCD. I have looked at this ...
3
votes
3answers
956 views

Which color puts the least “strain” on an LCD pixel to avoid burn-in/ghosting?

I am developing a user interface on a cheap Kinco color LCD HMI unit. After leaving a test UI on the screen for about 3 days, there was a very decided "ghosting" effect. I was able to eliminate the ...
0
votes
3answers
94 views

How would you search for this type of screen?

I have this cooking thermometer with a very small screen. For my DIY projects I'd like to buy some of these screens in bulk (say 10 or 20) and use them with arduino but I can't find a proper name to ...