Questions tagged [pixels]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
2 answers
43 views

How are the pixel charges relate to two analog voltages for this CCD camera?

A CCD pixel area is represented as in the figure below: And somehow in a CCD camera like this one each pixel converts the light upon it to charge. There are 1024 pixel elements in one of the model. ...
user avatar
  • 1,097
1 vote
0 answers
81 views

I am trying to design a basic CMOS Image sensor

I am new to electronics so I might be doing some bad mistakes on my design but anyways, I'm trying to build a CMOS Image sensor using Proteus, and I couldn't find some basic tutorial to follow, Yet I ...
user avatar
1 vote
1 answer
86 views

Why is quantization defined in powers of integer multiples of two in digital image processing?

I have been studying quantization in the context of digital image processing. I referred to the 4th edition of the book titled Digital Image Processing by Rafael C. Gonzalez and Richard E. Woods. In ...
user avatar
0 votes
1 answer
38 views

Minimum Detectable Signal of Camera and Improvements to Minimum Detectable Signal through pulsing

My goal is to determine for specific signal measSig, what is the largest background signal backSig I could receive and still be able to detect my measurement Signal? I know that camera modules ...
user avatar
0 votes
1 answer
86 views

Floating node in 4T CMOS camera pixel

I know how a 3 Transistor CMOS camera pixel works. As I understand, 4T CMOS pixels have one additional transistor that connects the photodiode to a so-called floating node. What is that floating node ...
user avatar
0 votes
1 answer
66 views

Why 3T APS pixel implements a NMOS reset transistor instead of a PMOS?

I'm very curious about why the 3T APS píxel sensor implements an NMOS reset transistor. As it is well-known, we will have a voltage of Vdd-Vth during the reset phase. This situation will imply higher ...
user avatar
0 votes
1 answer
78 views

What could cause a sub-pixel defect that is only visible under certain conditions? [closed]

An interesting but annoying pixel fault has appeared on the display of my laptop. At first glance it looked like a Stuck Pixel defect (one or two red, one blue and one green sub-pixel) but then I ...
user avatar
0 votes
2 answers
640 views

Is the gauge big enough? String Pixel

I think I might need different pixels or an additional power supply. I bought 10 strings of 50 (12mm, 12v) pixels (aka WS2811 12mm 12V LED) to do my first matrix project. It says that is uses 22awg ...
user avatar
  • 103
0 votes
0 answers
46 views

Pass bandwidth of backing light for LCD display

A stardard industry LCD display is composed of several parts. Polarizer film and color filters produce and image by masking the light from a source positioned behind the LCD itself, the so called ...
user avatar
  • 955
0 votes
2 answers
144 views

How to convert pixel map to voltage/angles?

My end goal is trying to get something rendered using lasers and a MEMS scanning mirror. There are not that many resources online for this, but it seems like the basic idea is pretty applicable to ...
user avatar
  • 103
4 votes
1 answer
128 views

Charge transfer in CCD

I have a basic doubt about charge transfer between pixels of a CCD. Let's consider this animation (picture taken from wikipedia): A precise time sequence of applied voltages between gates and bulk ...
user avatar
  • 3,246
1 vote
0 answers
123 views

What is the purpose of non-black dummy pixels in a linear CCD?

I'm studying the datasheet of Sony ILX511 linear CCD (PDF). On the Clock Timing Diagram, first 32 or 33 (depending on the mode) clock cycles give out dummy pixels, and only 18 of them are Optical ...
user avatar
  • 854
1 vote
0 answers
68 views

What are these mobile pixels?

I've got this picture under my microscope for an old Samsung Galaxy Ace mobile phone, I'd like to know what are the different pixels in the rows with a separation in the subpixels? And how are they ...
user avatar
0 votes
2 answers
646 views

LCD screen: can this problem be caused by the inverter?

I'm repairing a HP 530 laptop with bad screen image. The image does not flicker, the corruption pattern is static. If I connect an external monitor through the VGA port the image is fine, therefore I ...
user avatar
  • 111
0 votes
0 answers
450 views

WS2815 Erratic Color display

I have a two strips of WS2815 neopixel LED lights (400 pixels per string) being driven by WeMos D1 minis with the WLED library to control them. Since the two strips are on opposite sides of my porch, ...
user avatar
  • 101
2 votes
2 answers
123 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 ...
user avatar
  • 1,381
0 votes
2 answers
252 views

How to drive up to millions of ws2812 or APA104 LEDs? [closed]

I've driven more than 2k of APA102 from a computer using a USB to SPI interface for an interactive project. Since then I've been curious how I could made the same setup for even a large pixel area, up ...
user avatar
1 vote
0 answers
38 views

SK6812, what happens if a pixel fails?

I plan to use SK6812 RGBW LEDs for my projects. There was a question of reliability. What happens if one of the pixels fails? Will the signal go further? If not, which way to look?
user avatar
  • 419
1 vote
2 answers
102 views

Camera pixel size limit reached?

Just read here that Samsung has produced a camera sensor with a pixel size of 0.8 micron ie 800nm. Is it possible, or useful, for the pixel size to go below the wavelength of the light being imaged? ...
user avatar
  • 12.1k
0 votes
0 answers
142 views

EMWIN Keil LCD display shows half the screen completely!

I have written one project in Keil for STM32F103RE && ILI9325 2.8" TFT LCD, So my problem is this, the GUI_SetBkColor(GUI_BLUE); Function only fill only ...
user avatar
  • 53
0 votes
1 answer
198 views

Where can I get a display screen with 30 Hz or less refresh rate? [closed]

I am experimenting with a camera recording a display screen. Based on what I have read - camera recording a screen will have flicker if the refresh rate and frame rates are not synced. My mobile ...
user avatar
  • 1
5 votes
1 answer
4k 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 ...
user avatar
  • 1,009
-1 votes
1 answer
69 views

Why there is difference between image size and video resolution of a specific camera? [closed]

I was searching to buy a camera, but I saw in specs they wrote: 2MP(full hd) video recording 5MP image size Why the vido size is 2MP but image size is 5MP? How ...
user avatar
4 votes
3 answers
3k 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 ...
user avatar
  • 2,524