Reflections refer to the amount of light that will appear on a TV screen when there are other sources of light in the room. Some TVs take on a yellow tint when light is shining on them, and on others, objects that reflect on the screen are well defined and distracting. If you watch TV in a bright room, it’s important to get a TV that can handle reflections in a way that looks good in your setup.
For our TV reflections test, we take three photos: one of the TV reflecting a moderate amount of light, one with the same ambient light but the TV is powered off, and one with the TV powered off and reflecting a lot of light. We also measure the total amount of light reflected by the TV as a percentage of the luminance of the light source, then we remove specular (mirror-like) reflections and measure the amount of like reflected diffusely. We also verify the kind of screen finish that is used on the TV.
If your television is in your living room, light can become quite an annoyance during daytime viewing. Light shining into your viewing area can reduce the perceivable contrast of the onscreen material, and if light is shining directly onto the screen, it can be very difficult to see through the reflection.
If you have lights in your room or sources of sunlight, the way reflections appear on your TV is going to be important. Keep in mind that all TVs reflect some amount of light, so you won't be able to totally avoid reflections if you watch TV in a bright room. It’s also worth mentioning that in bright rooms, it's not only how much light is reflected that is important, but also how bright a TV's backlight is capable of getting.
Our first picture captures the amount of reflection that you would see with light sources of moderate strength shining on the TV. The TVs use our regular calibration settings for this photo, meaning they’re set for a dark room. If you watch TV in a dark room that sometimes or often has a bit of light opposite the TV, this test will be of some importance to you.
For this test, we display the image on the left on the TV and we set up and power on a lamp opposite the screen. We then take a photo. The TV’s backlight is set so that white emits at 100 cd/m2, which is appropriate for darker rooms. The two lights both have a color temperature of 6500k; one is the equivalent of 40W in strength, and the other is the equivalent of 60W.
We take a second picture of the TV with the same configuration as the average room picture described above. This time the TV is powered off to better show reflection characteristics independent of the TV content, and to show how the TV appears in dark scenes.
We take a third photo of the TV, this time with a much brighter source of light opposite the TV. This test is meant to simulate the kind of reflections you might experience in a bright room, with a window shining on the TV. If that’s a concern for your current setup, this test will be pretty important.
For this test, we turn off the TV and we set up and power on a few lamps (the two from the initial picture test + a softbox) opposite the screen, and then take a photo. The softbox has a color temperature of 5500k.
Our total reflection test results tell you the actual amount of light reflected by the TV. This reflected light includes diffuse reflections (light which hits the TV from the side and then is reflected directly at the observer) and specular reflections (mirror-like reflections). This helps categorize TVs in terms of how much light they reflect.
To measure the amount of light a TV reflects, we power off the TV and use a sampling sphere with a lamp to light up a portion of the screen uniformly. We use a luminance meter to measure the light reflected off the screen from the uniform surround. We also measure the luminance inside the sphere, which is our source. We then note the reflection's brightness as a percentage of that of the source.
Our total reflection test results tell you the actual amount of light reflected by the TV if there are no mirror-like reflections (if the overall room is bright, rather than a specific lamp or window reflecting directly off the TV). This helps categorize TVs for how they perform in a bright room, without lots of glare.
The measurement methodology is the same as for total reflection described above. However, the sphere is rotated so that there is an open port (leading to a dark room) in the direct line of reflection off the screen. This causes all specular reflections to be attenuated, and only diffuse reflections are measured by the luminance meter. We also measure the luminance inside of the sphere and calculate the indirect reflection brightness as a percentage of the source.
Our screen finish test verifies what kind of finish is used on the screen. Glossy finishes reflect less light but have defined reflections, whereas reflections on semi-gloss screens are stronger, but look a bit hazier. Depending on your needs, one finish will be better than the other; we recommend a glossy finish for people who only have ambient light sources around their TV and a semi-gloss finish for people who have a light source that shines directly on the TV’s screen.
There are really two ways this is verified. First, you can tell based on how much light is reflected. If a TV's total reflections are equal to less than 2% of the brightness of the lamp lights, the TV has a glossy screen finish. Over 2% means a semi-gloss finish.
The second is based on what the reflections look like. Glossy finishes have defined reflections, whereas reflections on semi-gloss screens look a bit hazier.
Reflected light will change the appearance of the light generated by the TV itself, which changes how you perceive the colors, and also washes out some of the details.
As a rule, the more light there is in the room with your TV, the brighter the backlight should be. This will allow the TV to somewhat outcompete the other light sources, helping to retain intended color and let you enjoy details in the image that might otherwise be washed-out.
Glossy screen finishes reflect less light overall than other screen finishes. Because there is less light reflected back, the blacks in the picture remain darker than they do on TVs with a semi-gloss screen. Contrast is one of the most important elements of picture quality, and so it is safe to say that, overall, glossy screen finishes offer the best picture quality of any screen finish.
This is also why matte screens are no longer around. The perceivable depth of blacks isn't as great with matte, and so in that regard, the picture looked worse than it does with semi-gloss or glossy screens.
The best way to diminish the appearance of reflections on your TV is to position the TV somewhere where there will be no light shining directly onto the screen. You should also raise the lighting (either backlight or OLED light) setting to the level that looks best in your space.
Light reflecting off of a TV screen can be distracting, or even ruin your TV’s picture. Some TVs are better at handling light than others, and the importance of getting one of these better performers increases for those who watch TV in a bright room. We take photos of each TV while it is reflecting a moderate and a high amount of light. We measure the total amount of light reflected by the screens and the amount of diffuse light which is reflected. We also check to see what kind of finish was used on the screen.
If you watch TV in a room that gets a decent amount of light, make sure you get a TV that can get nice and bright. You should also select a TV with a finish that works well for your TV’s positioning. For a TV that is directly opposite a light source, pick a semi-gloss screen with a low 'Total Reflection' number, since those won’t make the reflection well-defined on the screen. For rooms with lots of ambient light, get a glossy screen, since those reflect back less light overall (but aren’t as good for direct reflections). Unfortunately for some, matte screens no longer exist, and so you will need to get a separate filter if you want your TV's screen to be matte.