Extension photoflash light and camera system using the same

A camera system, comprising:

• a mobile device having a flat panel display and a camera lens;
• and
• an extension photoflash light, comprising:
• a high-intensity discharge (HID) lamp;
• a mounting mechanism for mounting the extension photoflash light;
• a light sensing circuit disposed on the mounting mechanism;
• and
• a control circuit coupled to the HID lamp and the light sensing circuit,
• wherein the mobile device emits a light signal on a specific block of the flat panel display,
• wherein the control circuit controls the light sensing circuit to detect the light signal of the specific block, decodes luminance of the detected light signal into a decoding message, and controls the HID lamp to perform flashing at a specific timing according to the decoding message.

An extension photoflash light to be externally mounted on a mobile device with a photographing function, wherein the mobile device with the photographing function has a flat panel display and a camera lens, wherein the extension photoflash light comprises:

• a high-intensity discharge (HID) lamp;
• a mounting mechanism, which is for mounting the extension photoflash light to make the extension photoflash light be disposed between a surface of the flat panel display and a surface of the camera lens, wherein when the extension photoflash light is disposed on the mobile device with the photographing function, one surface of the mounting mechanism overlaps with one portion of the flat panel display;
• a touch simulation device disposed on the mounting mechanism, wherein when the extension photoflash light is mounted on the mobile device with the photographing function, the touch simulation device touches the surface of the flat panel display of the mobile device with the photographing function;
• and
• a control circuit coupled to the HID lamp,
• wherein when the mounting mechanism of the extension photoflash light touches the surface of the flat panel display of the mobile device with the photographing function, the mobile device with the photographing function obtains information of a mounting position of the extension photoflash light according to the touch simulation device.