Your room is probably not as bright as you think. At least not during the times you actually use the TV in such a way that picture quality is important. But when is it a bright room and above all a room so bright that you have to buy a better TV?
The guide will give some simple tricks for how to determine whether a room is bright or not and if it makes extra demands on a TV. As aids, you need a lamp and preferably a package of medicine.
A bright room then means a room that has strong light levels from lighting and windows. Not that it is furnished with an open and bright character with bright textiles according to Nordic style. In winter in the north, a room is basically as dark as the light from other rooms and street lighting allows.
In summer, however, it can be daylight well into the evenings with open windows. Maybe your room follows the same transitions? Then the question is what does it look like when it is most important to use the TV? It may be that you need the ability to function in both the bright room and the dark room.
Reflective filters are critical for a bright room where a bad or simple reflective filter can also affect the image in dark and dimly lit rooms. Bright walls that are lit will be reflected back against the black of the image. These are indirect reflexes with objects and furniture. The better the reflex filter, the more of these indirect reflexes are attenuated.
Direct and indirect reflexes
Direct reflections are when you have lights and windows where the light hits the TV’s panel directly. This is immediately much more difficult to deal with because these reflexes can also completely illuminate the bright parts of the image.
TCL 75C855 in a room that is like a bright office, ≈300 lux surrounded by windows with daylight in the middle of the day in June. No TV can completely survive how the direct reflections of the windows deteriorate the picture without requiring blacking out. It will never be good, but it is about how far the compromise can be taken. However, a better filter and high brightness can make the situation better. Note how the room’s indirect reflections are muted even though the entire room is literally a bright office. A TV with high brightness can shine past this without any problems. In practice, the glare from the windows will be visible all the time. If the TV lacks sufficient brightness, the windows would still completely dominate the picture. If the TV had a worse reflex filter, the whole room would have been seen much more clearly.
Direct reflexes is best handled with smarter placement of lights and how the TV stands in relation to windows that let in daylight. However, it is difficult to handle sunlight and direct daylight because this light is so strong. No TV, despite several thousand nits, will win a tug-of-war against the sun’s 1.5 billion nits. Then it may be a good time to consider solutions such as thin curtains that diffuse the strong light or curtains that screen out completely.
indirect reflexes or secondary reflections come from the whole room which is illuminated by all the incoming light. Your furniture, walls, all the decorations and trinkets and even yourself when you sit in the armchair. Here, it is easier to manage the light level compared to direct reflex. This is usually where the biggest difference between models is. Few TVs can completely eliminate windows with daylight shining directly into the TV, while the best filters can still reduce how the room indirectly glares back.
This image has been used repeatedly and shows differences between how different models with different filters handle indirect and direct reflections.
A worse reflex filter will throw back the room like a film over the dark parts of the image even in already mild lighting in the evening. A better reflex filter can maintain the impression of black despite ever higher light levels but still fall short of the direct reflex.
One way to deal with this is more brightness in the TV which can brighten the picture so that it better matches the light level of the room. High brightness can illuminate the glare that occurs when the reflex filter is overridden.
Source: www.sweclockers.com
