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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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3answers
1k views

What is this unusual LCD controller technology?

Preface: Even if you do not have a definite answer, I would greatly like feedback from anyone who has even seen an LCD using this technology. I recently took apart a Canon digital camera from the ...
22
votes
12answers
8k views

Best serial monitor?

I just recently started using a Sparkfun serial LCD. I am able to control it through an arduino, but I want to be able to control it through a terminal on my computer. To be able to move the cursor or ...
19
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6answers
13k views

Reusing laptop monitors

I have a 17" laptop monitor with a 1920x1200 (WUXGA I beleive it's called? or just UXGA?) resolution which I simply love. Now, assuming the laptop dies before the monitor does, would anyone know if it ...
18
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9answers
6k views

DSP recommendation for beginners [closed]

I am considering a project involving a fair share of digital signal processing. As far as I know, the best type of IC suited for this are the Digital Signal Processors. I have never worked with them ...
18
votes
6answers
20k views

Why there are no circular LCDs?

There are some potential uses for round LCDs, for example smart watches. Searching reveals couple news from while ago but I haven't seen any in real use. What is the main reason why these non ...
18
votes
1answer
131k views

Differences between OLED, LED, LCD, and TFT Screens

I have heard about these different types of screens on DIY websites and in consumer electronics. What are the differences in these types of screens and what are their advantages and disadvantages?
18
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4answers
706 views

Do graphical/pixel mapped LCDs need a screensaver?

Will displaying the same for a very long time on a graphical or pixel mapped LCD harm the display in any way? If so, what would be a maximum time to display the same, or how could I determine that ...
16
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2answers
2k views

What are rubbery, conductive strips called on the sides of an LCD screen?

I found a component attached to a PCB inside one of my old $5 devices. There are pink, rubbery things attached to either side of the LCD that can bend and were firmly attached (glued?), and there are ...
16
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2answers
3k views

How to drive 1080p with only 540 pins?

I was trying to hack a 3-D system starting from the monitor: VG248QE. I teared it down to LCD matrix and driver. This is a 1080p(1920 x 1080) monitor so I was expecting that at least 1080(row) + 1920(...
14
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10answers
48k views

Arduino hooking up LCD without POT

I am using this LCD: Plus I am using an Arduino. I am trying to hook this up but without a 10K pot. How is this possible? Every tutorial I found involved the 10K potentiometer
14
votes
1answer
5k views

Mysterious LCD interface without wires [duplicate]

I was ripping off a Center 352 Infrared Thermometer. The basic functionality is to sense the temperature and display it on an LCD. The LCD turned out to have no interface to the controller. The PCB ...
13
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2answers
2k views

How does 13 connections control a simple LCD with 34 segments?

Inside my digital scales I find a 7-segment style LCD capable of displaying "-88:8.8" plus 3 symbols indicating Kg, Lb or St. This adds up to 34 individual segments, assuming the colon is a single ...
13
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1answer
2k views

1000 Hz+ refresh rate displays/ projectors? (for making volumetric displays)

I have found only few volumetric displays for the kind of effect I'm looking for. They can be divided by two characteristics into two separate groups each: rotating or moving screens, and moving ...
12
votes
7answers
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.
12
votes
1answer
4k views

Efficient display of simple text/graphics on color LCD by ARM

When designing an ARM-based device that should display simple graphics on a color LCD, how should one best go about designing things to allow fast updates, preferably without being tied to a ...
11
votes
2answers
3k views

Do LEDs require more power to function as they age?

I have a strange issue with the LED backlights of the LCD monitor i'm using. I have had it for about 5 years and up until this time have run it at only 10% brightness to reduce eye strain. However ...
11
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6answers
13k views

Cheap 1" LCD suitable for use with microcontroller? [closed]

What cheap LCD pixel displays are available which are 1" or smaller which could be interfaced to a microcontroller? (AVR, PIC24, etc.) I'd like to make an interactive keyfob. The important factor is ...
10
votes
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-...
10
votes
5answers
3k views

Power-up Initialization of HD44780 LCD Module

I'm using an HD44780 clone LCD module a KS0066U. Everything works ok on the module except when I rapidly power cycle the device (on->off->on). For some reason a very short interruption in the power ...
10
votes
1answer
4k views

Easily controlled color LCD for hobby projects?

I'm looking for some not too expensive, easy to control color graphics LCD I can use for various hobby projects, along with an AVR microcontroller or maybe an ARM in the future. The cheaper the better,...
10
votes
1answer
3k views

Why do almost all HD44780-based LCD displays use font pattern A00

The vast majority of text LCD displays for screens 4x40 or smaller use a controller based on the Hitachi HD44780. It's a pretty nice design in a lot of ways, so its popularity is understandable. One ...
9
votes
2answers
967 views

What is this “contactless” LCD display [duplicate]

I disassembled a cheap digital tire pressure gauge that had quit working (leaking silver oxide cell, as I discovered). After deciding it was unrepairable I removed the circuit board, which had the ...
9
votes
1answer
4k views

Why does my LCD screen emit sound when displaying black-and-white lines?

I recently discovered this page (epilepsy warning; flashing lights), which displays horizontal black and white lines and animates their thickness. Amazingly, it makes my laptop LCD screen emit an ...
9
votes
4answers
22k views

Debugging a 16x2 LCD Display on an Arduino

I have a standard 16x2 LCD display (I believe it is Hitachi HD44780 compatible - see summary and specification below), hooked to an Arduino Uno using 4 data pins, as described here, though I've added ...
8
votes
6answers
1k views

Electronic component that is like an LCD version of an LED?

Is there a liquid crystal display version of a light emitting diode? I want a visual indicator that is a small and simple 2 pin device like an LED, but instead of emitting light it just turns black or ...
8
votes
3answers
2k views

What is this type of digits-only LCD called?

I've seen this type of LCD many times in weigh scales, calculators, gauges, micrometers, etc. I know it's a fairly traditional display but I really like its compactness, simplicity, and maybe it even ...
8
votes
2answers
5k views

SPI device prevents ISP programming

I have an ATmega8 with a Nokia LCD 5510 connected to it. Everything works great on a breadboard and my next step is to move it to a more permanent board. My problem is that I can't program the ATmega8 ...
8
votes
1answer
752 views

Why don't wires block out the backlight of LCD/TFT displays?

Every explanation I've seen about how TFT/LCD screens work only talks about one pixel at a time. My question is: how are thousands of pixels and subpixels connected and controlled? I assume that they ...
8
votes
1answer
99 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 ...
7
votes
2answers
1k views

No PSB pin on LCD?

I bought a Winstar 144x32 LCD (WG14432D) because it was cheap and it would be nice to do some experiments with it. The main problem with this LCD is that it has no (working) library for it. I already ...
7
votes
4answers
6k views

How to measure Voltage & Current with a single multimeter, Simultaneously?

I have bought a cheap but neat Uni-T UT61E multimeter, which only has one display as most multimeters. For 40 Euro's I cant complain. It's on the way to me. Q.1 If I would like to measure both ...
7
votes
1answer
508 views

LCD driver: What changes in 3-D mode?

Facts: We know that a system needs high data transfer speed if it works with +120 Hz refresh rate and +1080p resolution(This mostly requires DVI dual link). We know that in a 3-D system with shutter, ...
6
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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 ...
6
votes
7answers
11k views

I took apart an LCD module. How do I fit it back together again?

To repair something, I had to disassemble it. Unfortunately, it had an LCD, and that used an elastomeric connector to connect to the LCD. Now I have an LCD, a PCB, and a spare elastomeric connector. I ...
6
votes
4answers
1k views

How are dot matrix LCDs controlled?

I've seen microcontrollers which claim to drive LCD segments. For example, the CC430 can drive 96 segments. But, it's a 64 pin chip. So, it must be providing signals for some kind of mux, what is ...
6
votes
1answer
1k views

LCD modules with I2C or SPI interface [closed]

I would like to add an LCD to my current design (a project that is to be produced in low volume, around 50 to 100 units). A small display size (around 8 or 16 characters) should be plenty since it is ...
6
votes
4answers
3k views

LCD : what is the material inside

does anyone know what is exact name(s) of liquid crystal material used in modern LCD's and how big should be electric field to make it change polarization? Update for the second bounty: My idea is ...
6
votes
2answers
2k views

Reverse engineering a 12 pin LCD?

I just found a broken "laser projecting alarm clock". I took it apart, and am interested in only the laser projection arm. This consists of a laser diode (although I suspect that this is actually just ...
6
votes
4answers
6k views

In LCD Display,scrolling only one line

In LCD Display, I want to SCROLL only one line in and Second line will be constant. I am using 0x1E command but the entire display will move.What commands is using for scrolling one line? I am using ...
6
votes
2answers
46k views

How do I power a LCD Backlight inverter (got from a disasembled LCD screen) [closed]

I have two LCD Backlight Inverters lying around here and I want them to powerup without using any laptop part / motherboards. I want to power it by using a simple power source, I have both AC and DC ...
5
votes
6answers
1k views

Serial Enabled LCD

What sort of LCD should should i be using to go with my Arduino? I have used the HD44780-compatible LCD in the past, but heard that the Serial Enabled LCDs make life a lot easier.
5
votes
6answers
545 views

Using LCD's of mobiles?

I was just giving my mother's mobile for repair at my local store and saw the owner stocking parts for them. I saw him stocking cheap (I mean really cheap) LCD (coloured and black & white). I was ...
5
votes
2answers
5k views

Hot Bar Manual Solder

I've just ordered some sample LCD displays. The only model available for now is hot bar solder (instead of a regular connector). Do you have any experience soldering regular thin wires to this type ...
5
votes
2answers
2k views

What is the use of the unused Data pins of a LCD

I've a 16 pin LCD. The whole display (16x2) can be driven just using only half of the data pins (D4 - D7) of the LCD. Other 4 data pins (D0 - D3) can be neglected. I need to know why then the LCDs ...
5
votes
4answers
2k views

Source a really big LCD character display

I'm looking around for a large LCD character display (metre-ish long, 10-15cm high), and on the cheap side (of course) Any suggestions? Actually I think I meant LED display, max $150ish
5
votes
3answers
10k views

Is it possible to wire up a cellphone screen to work with a different device?

I'm trying to find out if it is possible to send video to a cell phone screen (just the screen, not the phone) like this one from something like a video-mp3 player or even from maybe a mac-mini, or ...
5
votes
2answers
3k views

Name and reason for space between pixels on an LCD display

Hopefully this is a good place for this question... I figured it was too technical for the A/V board of StackExchange. Question: Simply put, a recent conversation brought up the issue of the name of ...
5
votes
2answers
475 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: ...
5
votes
3answers
4k views

Meandering traces necessary for 24-Bit parallel RGB LCD interface?

I am working on a project that interfaces an Atmel SAMA5D3 MCU with a LCD TFT display. The interface between both is 24-Bit parallel RGB with HSYNC and VSYNC signals. The resolution of the display is ...
5
votes
1answer
1k views

Interfacing with the kind of LCD found in thermometers

I have been experimenting with various sensors recently, and one common functionality I have needed with all of them is the ability to see the data being measured. Thus, I am considering attaching a ...