Abstract: A double-faced light emitting diode display includes a pair of parallel shield panels (20, 20?), and a light emitting module (30) located between the shield panels. Each shield panel includes a video contrast enhancement assembly. The light emitting module includes an opaque insulative substrate (31) with a pair of pixel matrixes symmetrically formed on opposite surfaces (310, 310?) thereof and a circuit driving system formed at at least one of the surfaces. Each pixel matrix includes a plurality of pixel units (320, 320?). Symmetrically opposite pairs of pixel units are electrically interconnected so that the shield panels can simultaneously display same images. The double-faced light emitting diode display has a simple structure, a small size, low cost and full color display capability, and can be advantageously applied in traffic signal boards, large-scale display boards, surround cinemas and so on.

Abstract: A double-faced plasma display panel includes two parallel viewing screens (20, 20?), and a discharge structure (30) located between the viewing screens. Each viewing screen includes a transparent substrate (21, 21?), with a plurality of transparent electrodes (23, 24, 23?, 24?), a transparent dielectric layer (22, 22?), and a protection layer (25, 25?) formed at an inner surface of the transparent substrate. The discharge structure includes an opaque insulative substrate (31), with a plurality of addressing electrodes (37, 37?), an opaque dielectric layer (38, 38?), a plurality of separation walls (39, 39?), and a fluorescent layer (40, 40?) formed at each of opposite surfaces (310, 310?) thereof. Symmetrically opposite pairs of same electrodes are electrically interconnected so that the viewing screens can simultaneous display a same image. Only a single driving system is needed to achieve the simultaneous display.

Abstract: A double-faced field emission display device includes two parallel fluorescent screens (10, 10?) and an electron emission structure (20) located between the fluorescent screens. Each fluorescent screen includes a transparent substrate (21, 21?) with an anode plate (12, 12?) and coplanar fluorescent layers (13, 13?) formed at an inner surface of the transparent substrate. The electron emission structure includes an opaque insulative substrate (28) with cathode plates (26, 26?), electron emitters (27, 27?) and grid plates (25, 25?) formed at each of opposite surfaces (281, 282) thereof. Symmetrically opposite pairs of same electrodes are electrically interconnected so that the fluorescent screens can simultaneous display a same image. Only a single driving system is needed to achieve the simultaneous display.

Abstract: A chip recorder is disposed on a circuit board for writing a chip, wherein the chip comprises a contact and the circuit board comprises a contact. The chip recorder comprises a chip housing, a base, a bracket, a push finger and an elastic member. The chip housing is detachably secured on the circuit board for accommodating the chip. The base is detachably mounted to the chip housing and disposed between the chip housing and the circuit board wherein the base comprises at least one probe and a first end of the probe is electrically connected to the contact of the circuit board. The bracket is moveably connected to the chip housing and the push finger is pivotally connected to the bracket and moveably connected to the chip housing.

Abstract: A chip recorder is disposed on a circuit board for writing a chip, wherein the chip comprises a contact and the circuit board comprises a contact. The chip recorder comprises a chip housing, a base, a bracket, a push finger and an elastic member. The chip housing is detachably secured on the circuit board for accommodating the chip. The base is detachably mounted to the chip housing and disposed between the chip housing and the circuit board wherein the base comprises at least one probe and a first end of the probe is electrically connected to the contact of the circuit board. The bracket is moveably connected to the chip housing and the push finger is pivotally connected to the bracket and moveably connected to the chip housing.

Abstract: A double-faced light emitting diode display includes a pair of parallel shield panels (20, 20?), and a light emitting module (30) located between the shield panels. Each shield panel includes a video contrast enhancement assembly. The light emitting module includes an opaque insulative substrate (31) with a pair of pixel matrixes symmetrically formed on opposite surfaces (310, 310?) thereof and a circuit driving system formed at at least one of the surfaces. Each pixel matrix includes a plurality of pixel units (320, 320?). Symmetrically opposite pairs of pixel units are electrically interconnected so that the shield panels can simultaneously display same images. The double-faced light emitting diode display has a simple structure, a small size, low cost and full color display capability, and can be advantageously applied in traffic signal boards, large-scale display boards, surround cinemas and so on.

Abstract: A double-faced plasma display panel includes two parallel viewing screens (20, 20?), and a discharge structure (30) located between the viewing screens. Each viewing screen includes a transparent substrate (21, 21?), with a plurality of transparent electrodes (23, 24, 23?, 24?), a transparent dielectric layer (22, 22?), and a protection layer (25, 25?) formed at an inner surface of the transparent substrate. The discharge structure includes an opaque insulative substrate (31), with a plurality of addressing electrodes (37, 37?), an opaque dielectric layer (38, 38?), a plurality of separation walls (39, 39?), and a fluorescent layer (40, 40?) formed at each of opposite surfaces (310, 310?) thereof. Symmetrically opposite pairs of same electrodes are electrically interconnected so that the viewing screens can simultaneous display a same image. Only a single driving system is needed to achieve the simultaneous display.

Abstract: A double-faced field emission display device includes two parallel fluorescent screens (10, 10?) and an electron emission structure (20) located between the fluorescent screens. Each fluorescent screen includes a transparent substrate (21, 21?) with an anode plate (12, 12?) and coplanar fluorescent layers (13, 13?) formed at an inner surface of the transparent substrate. The electron emission structure includes an opaque insulative substrate (28) with cathode plates (26, 26?), electron emitters (27, 27?) and grid plates (25, 25?) formed at each of opposite surfaces (281, 282) thereof. Symmetrically opposite pairs of same electrodes are electrically interconnected so that the fluorescent screens can simultaneous display a same image. Only a single driving system is needed to achieve the simultaneous display.