LG 32LH20 LCD HDTV Review - Color Accuracy |
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Published on July 21, 2009 Comment on this |
Color Temperature (9.5) Anything that emits light produce tht light at a certain temperature, which can range from warm to cool. Most televisions allow you to adjust the color temperature between several settings, to suit your preferences. Whatever color temperature you choose, what you don't want is for that color temperature to vary as the content on your television screen changes, as this can cause a reddish or bluish cast to appear where you don't want it. in this test we look at how stable the LG 32LH20's color temperature is. Below you can see a graph of the color temperature as we went from a white to a black screen.
You can see that the color temperature stays very stable across the vast majority of the greyscale, with only a slight variance appearing at the dark end, which is not uncommon. This is pretty close to ideal, and you won't have to worry about getting a strange cast to your content when watching it on the LG 32LH20.
RGB Curves (8.49) All the colors produced by your HDTV are created by mixing red, green and blue, making the accuracy of these colors very important. In this test we take a look at how well the LG 32LH20 reproducing each of these across the intensity range from dark to bright. Blow you can see the curves for each of the three colors, which have been normalized.
You can see that the LG 32LH20's curves are relatively smooth. There also isn't very much of what we call peaking, which is indicated by by a plateau at the top of the curves. Peaking is a problem as it indicates that the television can't make any more adjustments in the color as it reaches the bright end of the curve, which can lead to loss of detail in bright areas. This isn't a concern with the 32LH20. Below you can see the 32LH20's color curves displayed as a gradient and compared to an ideal, as well as our three comparison televisions.
Color Gamut (7.63) In order to ensure that the colors you see from content is the same regardless of the television you are viewing it on all HDTVs must meet an international guideline for color gamut known as Rec.709. In this test we look at how well the LG 32LH20 matched this standard. Below you can see a graph of our results, with the 32LH20's color gamut graphed against Rec.709.
You can see that the 32LH20 did a good job, with only a small amount of error in the reds and greens. The error we saw was significantly less than the average HDTV. Below you can see the actual color coordinates that we measured.
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• Very stable contrast ratio
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