new technology upgrades for the future development of LED backlights-2

The LED backlight is in line with the concept of green and environmental protection in the market

At this stage, large-size TV backlight sources are mainly direct-type, and now EU standards, domestic standards, products must comply with RoHS standards, UL standards, and later added halogen-free requirements. The CCFL products that are widely used now contain Hg substances in the lamps.

Due to this characteristic, an exemption for this substance is added to the standard, that is, the substance is qualified and available in a certain amount. However, the substances containing Hg in CCFL are still contrary to the current environmental protection requirements. Today's products require green and environmental protection. Notebook computers in product backlights have achieved no Hg requirements for backlight products since the use of LEDs. The emergence of large-size LED backlights just meets the requirements of green and environmental protection in the current market.

Side-emitting dynamic backlight and low power consumption technology

The large-size TV products that are generally mass-produced now use direct-type CCFL as the light source. This kind of drive requires Invertor technology. Due to the power problem, the use of CCFL as the light source consumes a lot of power. With the development of technology With the continuous improvement, the power consumption achieved by this technology has approached the limit value.

The introduction of high-end direct-type LED backlights has brought the technology of reducing power consumption to a higher level. With the emergence of high-power LEDs and the improvement of efficiency, the power consumption of direct-type LEDs is continuously reduced. Direct LED backlight also has a breakthrough technology, localdimming (regional control), also known as dynamic backlight technology, which greatly reduces the power consumption of the backlight and improves the contrast of TV products, but requires the number of LEDs.

More, the thickness of TV products is relatively large, and the aesthetics and flexibility are slightly less. The side-emitting LED large-size backlight technology introduced later combines the advantages of ultra-thin, beautiful and low power consumption. It is expected that localdimming technology can be used in large-size side-emitting LED backlights to greatly reduce the power consumption of the backlights.

The direct-type LED dynamic backlight is combined with image processing. In dark places, the LED reduces the current or voltage, which requires higher technical requirements for the driving circuit, but greatly reduces the power consumption of the backlight. The edge-type LED backlight source is controlled by LED cross to achieve regional control and reduce power consumption to a certain extent. The edge-type LED large-size backlight combines various advantages. If a breakthrough in localdimming is achieved, it will be another improvement in technology.