This section describes how do select a digital Photo Frame. A DPF consists of three main parts: LCD-panel, PCB and frame. All of these components have to be checked. In addition, also accessories and especially usability is important. Therefore, it is recommended to test the models, either by visiting the factory or by buying samples. Besides that it may be important to ask the minimum order quantity and whether OEM is possible. The necessary certificates (FCC in USA, CE and RoHS in Europe) should be a k.o.-criterion for buyers.
1. LCD-panel (Liquid Crystal Display Panel)
For sizes of 7" or below, mostly analogue TFT LCD panels are used. Bigger models usually use digital panels. Their quality is much better. However, the price also goes up. In general 4:3 is better than 16:9, as digital cameras use 4:3. Some models, however, include a button that allows to switch that ratio. The resolution for a 7" frame is usually 480 * 234 pixel (= 480 * 3 * 234 or 1440 * 234). The higher the resolution, the better the picture quality. The important point with panels is to ask whether the panels are new or recycled. For 8" or below, most of the panels are new. For bigger models, some companies use recycled panels. An indirect way to find out whether the panels are recycled is, that for recycled panels no RoHS certificate can be provided. Popular panel brands are Innolux, AU or LG, but also Sharp.
2. PCB (Printed Circuit Board)
The PCB is the heart of a digital photo frame. For the board it is important, which solution is being used on the board. Solution is the used software. Popular solutions are Zoran for the simple function models. For the simple "multimedia" digital Photo Frame Sunplus, Cheertek (both are originally solutions for DVD players), MTK and Macronix (the original solution for digital photo cameras) are widely used. For the improved "multimedia" digital Photo Frame Amlogic is usually used. The solution is just the technical background. For the user the outcome is important. The solution decides which file types and which cards can be supported. It also decides whether a built-in-memory is possible.
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