Explanation and difference of VGA, QVGA, WVGA and

Explanation and difference of VGA, QVGA, WVGA and HVGA terms
After VGA, QVGA, WVGA and HVGA resolution products are gradually born, which can be seen everywhere in mobile phone parameters. The following is the explanation and difference of sub terms of VGA, QVGA, WVGA and HVGA.
VGA
Video graphics array. It is a video transmission standard launched by IBM with PS / 2 computer in 1987. It has the advantages of high resolution, fast display speed and rich color. It has been widely used in the field of color display. VGA first referred to the display 640x480. The full English name of VGA is video graphicararray, also known as display drawing array. S900c + in Dopod mobile phone is a typical example
QVGA
Quarter VGA. The quarter size of VGA in, that is, the output resolution on the liquid crystal display (LCD) is 240 × 320 pixels. QVGA supports screen rotation, and corresponding programs can be developed to display the screen positions rotated by 90 °, 180 ° and 270 °. Issued by Handera. Mostly used for handheld / mobile devices.
WVGA
That is "wide VGA". Its resolution is 800 × 480 pixels. Yes, VGA (640 × 480) resolution. Applied to PDAs and mobile phones, because the width of many web pages is 800, the WVGA screen will be more suitable for browsing web pages, which can be said to be the general trend of the resolution of handheld devices in the future.
HVGA 
That is, "half size VGA". It is half the resolution of VGA (480 * 320), (3:2 aspect ratio). It is used for a variety of PDA devices. The first is the Sony clie PEG - nr70 in 2002, the BlackBerry also has HVGA, and the iPhone is also a HVGA device. The world's first Google mobile phone, T-Mobile G1, is equipped with 3.2-inch HVGA (320) × 480 pixels) resolution full touch screen.
The mobile phone screen is different from VGA QVGA HVGA WVGA. Generally, the mobile phone LCD screen is made of TFT. VGA WVGA QVGA hvge XGA only indicates the screen resolution, which is a code and has nothing to do with the material.

  Resolution comparison table:
Code resolution
QVGA 320 * 240 pixels wqvga 400 * 240 pixels
HVGA 320 * 480 pixels VGA 640 * 480 pixels
WVGA 800 * 480 pixels XGA 1024 * 480 pixels
QVGA is quarter VGA. As the name suggests, it is the quarter size of VGA
HVGA (half size VGA), i.e. half of VGA (640 * 480)
WVGA is wide VGA
Full name of wqvga: wide quarter video graphics array
See Baidu Encyclopedia for details of VGA and XGA (Extended Graphics Array)
They have nothing to do with the screen size. For example, the Nokia N95 and Nokia E71 are QVGA 320 * 240, the N95 is 2.6 inches, the N95 8GB is 2.8 inches, and the E71 is 2.36 inches
Look again, the Apple iPhone is HVGA 320 * 480 3.5 inches, while the G3 (HTC Hero) is also HVGA 320 * 480, with a screen of 3.2 inches.
Of course, the smaller the screen with the same resolution, the finer the display!