What is Aspect Ratio?
Aspect ratio is the fractional relationship between the width and height of an image. The two most common aspect ratios for digital photo frames are 4:3 (also known as 4x3, 1.33:1, or standard) and 16:9 (16x9, 1.78:1, or widescreen). Some frames have the ability to display images in 4:3 or 16:9. Some frames offer "panoramic" viewing (generally considered to be 3:1 aspect ratio), though this format is somewhat of a rarity for most manufacturers. Most pictures you take are probably 4:3 aspect ratio. If you have a frame that only displays 16:9, your 4:3 pictures will either be cropped or stretched. Do not be confused when you see a frame with an aspect ratio such as 15:9 or 16:10--for all intents and purposes the frame is 16:9 widescreen format.
What does Screen Resolution mean?
The resolution of a digital picture frame LCD (Liquid Crystal Display) is measured by the number of image pixels the screen is capable of displaying. The higher the number of pixels (or dots), the higher the resolution of the image will be. Higher resolutions ultimately determine more detail in an image, and thus a higher image quality.
What does Brightness mean?
The higher the brightness, the image effect will be clear, can see the details of the more. All LCD's brightness is generally in the 250 cd / m2 (lumens).Brightness or luminance--typically expressed in candelas per square meter (cd/m2)
What is the Bluetooth feature?
Bluetooth capability: Allows you to send photos straight from your mobile/handheld device straight to your frame for immediate viewing.
What is a collage feature?
A collage feature allows you to display more than one digital photo on the screen at the same time.
What is Image Transfer and Storage?
There are many ways you can transfer images to your digital photo frame. When reviewing frames, look to see what options they offer for image transferring, such as memory cards, thumb drives, a USB cable-to-computer connection, Ethernet connection, or wireless/Bluetooth capabilities.
file-type compatibility: Ensure your frame supports the media format you’re trying to load on to the frame, such as JPEG, MP3, MPEG-4, MPEG-1, AVI, BMP, MPEG-2, WMA, EXIF, TIFF, WMA, WMV, PPT, PNG, MOV, GIF, or DivX.
onboard storage capacity: Most frames come with a set amount of onboard storage. This can range from 8.0 MB to as high as 80 GB. If you’re looking for a frame that requires little upkeep, then consider buying one with ample onboard storage. With thousands of images already in the frame, you won’t have to update it very often.
memory cards: Nearly all frames are compatible with memory cards that in turn are used as the frame's memory source. Note the type of memory cards that are compatible with the frame, such as SD, memory stick, compact flash (CF), MMC, xD-picture (xD), and Microdrive (MD) cards.
LCD and TFT:
Most digital photo frames come with LCD (Liquid Crystal Display) screens. However some have TFT (Thin Film Transistor--a subtype of LCD screens that use separate transistors to control each pixel. Also known as "Active Matrix" displays).
OLED: A small handful of digital frames are now using OLED display technology for their screens. OLEDs (Organic Light Emitting Diode) screens are composed of slender films of organic compounds that create light via the application of electricity. OLEDs can provide brighter, sharper image displays and use less power that the conventional LCD as they don’t require a backlight. In turn, this also means OLEDs can be a lot thinner than an LCD. Because OLED technology is fairly new there are some drawbacks, such as expense and durability.
