Digital Photo Frame Of The Main Components
LCD liquid crystal display, PCB circuit board and frame. LCD screen can be simulated can also be digital, they are distinguished by size. PCB circuit board is the heart of the Digital Photo Frame, because it contains the necessary software.
For the end user, the frame is an important criterion. Frame material is usually plastic or wood, there are a number of digital photo frame provides replacement frame.
Mimic the input signal is analog RGB signals, in general, and on each row line signal to reverse, but also for appropriate VCOM signal needs to +10 V and-10V or more below the bias voltage, vertical resolution is usually about 230; Digital sub-screen input signals such as TTL and LVDS several, generally red, green and blue three colors each with 6 to 8 digits to indicate the amount does not require an external bias, the vertical resolution of typically 400 or more.
In fact, digital display and analog display is driven by a digital signal display. It is now talking about digital and analog display screen from the LCD screen interface to distinguish between, and can directly input analog signals is to simulate the display screen, to enter the digital signal is the digital screen. Mimic digital screen more than a A / D converter used to convert analog signals into digital signals. Digital screen to directly address the digital signal to display. Digital display of signal transmission from its way to points, can be divided into TTL, LVDS, etc. methods.
In the touch screen in the field of view, simulation screen, also known as analog, digital screen, also known as matrix, analog-style with a touch and handwriting functions; matrix only contacts function, Digital Picture Frames similar to a resistive switch. Mimic the input signal and subject to A / D conversion, calculate the input coordinates, and then by the software to determine the role of coordinates of the location or function, pinout mostly four (4 wire) or five (5 wire); digital screen only as a surface touch point, pinout according to the design circuit is different from the above article from the 7-8 range.
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