TV resolutions in South Africa tested — with two surprising results

MyBroadband tested the screen resolutions of televisions and computer monitors in South Africa, and two TVs had higher resolution panels than advertised.

The JVC 127cm Full HD TV and the Aiwa 146cm Full HD televisions have 4K panels instead of the advertised 1080p.

The engineer who performed the testing said both TVs came up as 1080p (Full HD) displays when connected to a computer. They also don’t seem to support any higher resolution inputs.

To test the resolution of the televisions and computer monitors, MyBroadband used a digital microscope which was calibrated for dimensional measurements.

A tiny piece of the screen was then photographed using the microscope at a magnification which made individual pixels visible.

Measurements were then taken to determine how far the pixels were spaced from one another. The physical size of the screen panel was also measured.

By dividing the screen’s dimensions with the spacing of the pixels, the number of pixels on the panel was calculated.

The calculated screen resolution was then compared with the advertised resolution of the televisions and monitors.

Because of the nature of measuring the panel resolutions manually, the test results can be expected to vary slightly from the actual resolution.

Common panel resolutions include 1920×1080 for a Full HD panel or 3840×2160 for a 4K or Ultra HD panel.

When the tested resolution differed from the advertised resolution, the screen was connected to a laptop, and the EDID (Extended Display Identification Data) was checked for the resolutions supported by the screen controller.

Screen resolution testing
Screen resolution testing

MyBroadband visited prominent technology retailers and tested a range of television and PC monitor brands.

The TV and monitor brands included in the research were Samsung, LG, Dell, JVC, Sinotec, Hisense, Sansui, Skyworth, Diamond, and Telefunken.

In all cases, except for the JVC and Aiwa TVs mentioned above, the testing confirmed the screen resolutions were in line with advertised values.

The table below provides an overview of the test results.

The images below the table show the digital microscope photos of the monitors and TVs which were included in the testing.

South African TV and Monitor Resultion Test
Advertised Value Test Result Difference
Device Horizontal (x) Vertical (y) Horizontal (x) Vertical (y) X-diff Y-diff
Sansui 55-inch Full HD TV 1920 1080 1862 1043 -3.04% -3.42%
Samsung 55-inch Full HD TV 1920 1080 1862 1049 -3.04% -2.85%
Dell 27-inch Full HD monitor 1920 1080 1866 1040 -2.83% -3.70%
Microsoft Surface 3 2496 1664 2446 1606 -2.00% -3.48%
JVC 55-inch Full HD TV 1920 1080 1891 1079 -1.53% -0.06%
Skyworth 55-inch Android UHD TV 3840 2160 3821 2159 -0.49% -0.06%
JVC 4K TV 3840 2160 3825 2158 -0.40% -0.10%
Telefunken 40-inch Full HD TV 1920 1080 1917 1196 -0.17% 10.71%
Skyworth 50-inch UHD TV 3840 2160 3837 2121 -0.07% -1.82%
Sinotec 58-inch UHD 3840 2160 3848 2149 0.22% -0.50%
Hisense 55-inch 4K TV 3840 2160 3862 2159 0.57% -0.06%
Sinotec 55-inch UHD TV 3840 2160 3862 2159 0.57% -0.06%
Skyworth 43-inch Full HD TV 1920 1080 1938 1082 0.95% 0.15%
Sansui 58-inch UHD TV 3840 2160 3888 2182 1.24% 1.01%
Sinotec 49-inch 4K TV 3840 2160 3893 2196 1.38% 1.69%
JVC 55-inch 4K TV 3840 2160 3903 2194 1.65% 1.55%
Diamond 65-inch Full HD TV 1920 1080 1959 1100 2.03% 1.85%
Hisense 58-inch UHD TV 3840 2160 3928 2215 2.29% 2.56%
LG Nanocell 55-inch 4K TV 3840 2160 4079 2292 6.21% 6.12%
JVC 146-cm UHD TV 3840 2160 4141 2323 7.85% 7.53%
Aiwa 146-cm Full HD TV 1920 1080 3848 2182 100.44% 102.02%
JVC 50-inch Full HD TV 1920 1080 3882 2175 102.21% 101.43%

Sansui 55-inch Full HD TV


Samsung 55-inch Full HD TV


Dell 27-inch Full HD monitor


Microsoft Surface 3


JVC 55-inch Full HD TV


Skyworth 55-inch Android UHD TV


JVC 4K TV


Telefunken 40-inch Full HD TV


Skyworth 50-inch UHD TV


Sinotec 58-inch UHD


Hisense 55-inch 4K TV


Sinotec 55-inch UHD TV


Skyworth 43-inch Full HD TV


Sansui 58-inch UHD TV


Sinotec 49-inch 4K TV


JVC 55-inch 4K TV


Diamond 65-inch Full HD TV


Hisense 58-inch UHD TV


LG Nanocell 55-inch 4K TV


JVC 146-cm UHD TV


Aiwa 146-cm Full HD TV


JVC 50-inch Full HD TV


Now read: South Africa’s new TV licence law published

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TV resolutions in South Africa tested — with two surprising results