Being better depends totally on the experience you wish to have. Active 3D can provide a clearer image if you stay exactly in one spot in a fixed area and maintain your battery charge. Passive 3D provides the same quality image with more options as far as viewing position. Their glasses arent battery-operated neither. If you want a recommendation, there is a type of passive 3D TV which uses cinema 3D tv technology (same technology as the cinema) and it delivers 10/10 for me. I'm not familiar with all the features so you'll have to Google it.
Active 3D glasses are far better than passive glasses when used with an active 3D television. Similarly, passive 3D glasses work well with passive televisions. Active glasses have been criticized for their weight in the past. Later glasses are lighter than many passive glasses, have a battery life of over one hundred hours and are proving to be exceptionally reliable.
3D TVs are a hot issue these days. Some say active 3D TV is better, some say passive 3D TV is better. I didn't see difference when I went to Best Buy.
Active 3d glasses will not work with passive 3d TV. Active glasses use shutter 3D technology that requires a power source to power the lenses in the glasses. Passive glasses don't have electronics or batteries. Hence, they are lighter and more comfortable. Active and passive TV work using completely different technology and thus active glasses cannot work on passive TV.
LG only make passive 3D television. They do not supply any models that are active 3D.
Because they aren't better than active 3D television. Both have their advantages. Passive televisions use polarizing glasses to separate the left and right eyes' images. The effect is that the perceived resolution is cut in half to 540 lines, less than the 576 lines of older standard definition images.
First, you have to understand that there are two types of 3D technologies, active and passive. Active 3D TVs are like Panasonic, Sony, or Samsung's 3D TV. Passive ones are like Vizio or LG 3D TVs. Active 3D retains full HD resolution whereas passive cuts the effective resolution down to only 540 lines. However, passive is a cheap system compared to the premium brands.
2 manufacturers, LG and Vizio, are using passive 3d technology. All others are currently selling active 3D systems.
You should consider first whether you want passive 3D or active 3D. But which technology is a better choice for the consumer depends on preferences and intended use for 3D in the home. LG, Vizio, and Toshiba currently have active 3Ds.
Samsung, like the majority of manufacturers only makes active 3D tvs. LG and Toshiba make passive 3D TVs. Although there is debate over the better technology, manufacturers are supporting active 3D more than passive. It has had some teething trouble in its early days but recent developments have made it far more robust and the once heavy glasses are now as light as many of the passive glasses.
Battery free glasses for 3D are better if they are being used with passive 3D televisions. LG only have passive 3D television so the battery free glasses work with them. The other premium brands such as Samsung, Sony etc all use active 3D and their glasses are battery powered. The active glasses are far better for use with active televisions because the battery free glasses won't work with them. Previous criticisms of active glasses were weight and battery life. With the weight below one ounce and battery life of over 100 hours, neither of these are issues any more.
The TV will specify if it is a passive or active shutter.
The main difference between active and passive 3D TVs is that active 3D TVs use shutter system and passive 3D TVs don't. Shutter system inserts a black frame after each image frame and the result is when your right eye is seeing an image, your left eye sees a black frame. Each side of the glasses take turn to project the image and the black frame i.e. the glasses. This causes flickering images and crosstalks. Passive 3D TVs, however, let your eyes see the 3D images as you naturally see other things. There are no black frames after each image frame. This allows the passive 3D TVs to be flicker free and crosstalk free. Cinema 3D TVs are passive 3D TVs. Passive TVs project images with more vibrant colors and of higher quality.