Taiwan area LED driver IC with the rapid growth of the LED industry

First, the LED industry application trends

High brightness LED applications: cell phone backlight, flash, GPS, car lights, NB backlight, street lights, building lighting, large billboards, as shown in figure:

Two, LED application has the advantages

Because LED has the characteristics of low temperature, shock resistance, small size and so on, it has the characteristics of independence and non substitution in the field of functional lighting.

LED features

Application market

Directional light

Local lighting (point light, corridor lamp)

Loop and light source composition

Building or landscape lighting

Less heat

Local illumination

Long life

High maintenance cost light source for aviation lamp and building aviation warning lamp

Light weight

Power machine (aircraft, elevator, etc.)

Small volume

Furniture / building applications market

High color rendering

Medical, agricultural, fishery and animal husbandry

Low temperature resistance

Cold or cold / frozen light source

Three, NB using LED backlight proportion increase

2008 LED application is still dominated by mobile phones, accounting for about 50%. But in the application of large size panel backlight also increased rapidly, due to a number of LED applications and the panel is directly related to the size, in LED backlight and CCFL still has spread, will be less than 13 inches in size for the application of panel mainstream, estimated in 2008 the application of LED in the NB backlight module ratio will reach 11% in 2010 will grow 40%.

Four, LED backlight with dimming function

With the increase in the proportion of backlight applications and product features, LED dimming has become an essential function, such as: 1 PDA can adjust the screen brightness, in order to cope with the surrounding environment lighting. 2 mobile phone will be in the system for a period of time, automatically reduce or cut off the backlight power supply.

Five, LED drive IC dimming mode comparison

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Source: China Semiconductor Lighting Network