Temporary lighting on the mobile phone application oled module

Mobile phones offer features LED lighting is generally considered fairly sophisticated design, composed of many flashlights now by the number of teeth low power LED, and through a relatively low 20mA to 60mA current driving the trend can be seen. Such lighting can be used as a portable flashlight, but it's faint illumination intensity on the support of the dark environment, but significantly less motion pictures, in fact, must have one or more high-power LED to support one meter or farther objects shooting lighting hinder engineers use high-power LED main reason is cost, but in the Taiwan Area and the Korean manufacturers gradually increasing power COG LCD Display production capacity, we can expect price will begin to decline.
High power flash with LED
The lighting and the flash mode is usually used with different current driving time, for example, can be used in the lighting mode, a continuous current of 200mA, and the flash mode is used to 400mA 1A, pulse current, pulse duration of the flash of the camera module according characteristics, and generally between the flash pulse width between 20ms to 200ms, the flash driver circuit to support the flash LED drive current of about 1A, providing up to 4.9W output LED, the LED junction temperature is maintained at the maximum capacity of the range, the temperature must be well management strategy, the pulse width narrow help reduce unnecessary consumption, while a large ground contact area of ​​the heat from the custom lcd is a preferred way to export.