Next in line for our Display 101 series we have an article that explains the resolution in smart displays. So, let’s start from the definition of display resolution.

The resolution of a display is the number of horizontal and vertical pixels – picture elements, in every dimension, that can be displayed.

The pixels are arranged in an array to form images – combined to illuminate, project and reorient optics.

A bit more about the pixel

The first time, the expression “pixel” was published was in 1965, to describe elements of the pictures from space probes. It is the smallest controllable representation of a displayed image.

Display 101 Riverdi pixels

The most commonly used solution for obtaining colors on the display is the use of mixing of three primary colors in the RGB system – Red, Green, and Blue, giving a color image thanks to additive mixing.

Every pixel of the image can be independently changed. Each pixel consists of three subpixels, emitting light in red, green and blue.

Controlling of the emission intensity of the subcomponents results in the color of the whole pixel. As a result, for the black color – all sub-pixels are dimmed. While the white color corresponds to the maximum intensity of all three components.

Standard sizes of Riverdi displays

Riverdi offers standard industrial display sizes with the following resolutions:

size resolution short name for resolution
2.8” 240×320 QVGA (portrait mode)
3.5” 320×240 QVGA
4.3” 480×272 WQVGA
5.0” 800×480 WVGA
7.0” 800×480 WVGA

 

Above you see the most common display resolution for those sizes, and there are short descriptions given for quicker recognition. The QVGA corresponds to Quarter Video Graphics Array. This short description has historical reasons. The VGA was industry standard in the late 1980s (because of the IBM products), and the 320×240 resolution is 1/4 of this image:

Riverdi Display 101 VGA resolution

The aspect ratio of QVGA is 4:3. WQVGA definition describes more than one resolution. It characterizes display resolutions of the same height (given in pixels), but wider.

Variants of WQVGA:

Height [pixel] Wide [pixel]
360 240
376 240
384 240
400 240
428 240
432 240
480 270
480 272

 

The aspect ratio for the WQVGA is different for every height. The Riverdi 4.3” aspect ratio is 16:9.

The Riverdi 5.0” and 7.0” are WVGA, what means Wide VGA (there is the same rule as for WQVGA – the height stays the same as VGA). Also, there are some more popular variants of WVGA:

 

Height [pixel] Wide [pixel]
640 360
640 384
720 480
768 480
800 450
800 480
848 480
852 480
853 480
854 480

 

The aspect ratio of Riverdi products of WVGA is 5:3 (also described as 15:9).

We hope you learned something new from our article, and that you’re ready for the next one in the Display 101 series. If you have some topic that you would like for us to cover, drop us a message on our social media.