LED lighting device and lamp shade, and circuit preparation method thereof

An LED (light emitting diode) lighting device, comprising:

• a base, an LED light-emitting unit and a lamp shade, wherein:
• the LED light-emitting unit is arranged on an upper surface of the base;
• the lamp shade contacts with the base directly, and covers the LED light-emitting unit;
• the LED light-emitting unit comprises a plurality of LED light-emitting chips and a circuit coating;
• the circuit coating is directly coated on the upper surface of the base;
• the LED light-emitting chips are directly disposed on the upper surface of the base, and electrode pins of the light-emitting chips are electrically connected with the circuit coating;
• the lamp shade has an outer surface and an inner surface;
• the outer surface is a light exit surface;
• the inner surface consists of a light distribution surface and a thermally-conductive surface, wherein the light distribution surface is arranged on an inner surface region corresponding to the LED light-emitting chips;
• a gap is formed between the light distribution surface and the LED light-emitting chips, to form a light distribution chamber together with the upper surface of the base;
• the thermally-conductive surface is arranged on an inner surface part other than a part where the LED light-emitting chips are installed on the base, or an inner surface region corresponding to the entire upper surface, and closely fits with the base;
• and the thermally-conductive surface is at least distributed in a central region and an edge region of the inner surface;
• the central region covers 10-55% of a projected area of the entire inner surface;
• the lamp shade is made of transparent ceramic or glass.