Texas Instruments Gives Insight on How to Improve Backlight Efficiency in Portable Displays

When you look at today’s smartphones, or phablets and you see that the screens are getting bigger and bigger, do you realize that the display is what is taking up most of the power in the system?  

Take a look at this screen shot of a Galaxy Tablet running the Android operating system…  

Clearly you can see that the screen is what takes up the most power. Minimizing the power required for that part of the system directly impacts the battery life. Now, if you have kids, they have probably showed you that dimming your screen will make it last longer. But what if you are in the bright sun all day and need the brightness?

Choosing the right backlight device and the right configuration can make all the difference. TI’s LM3697 allows the designer to use 1, 2, or 3 strings to configure the LEDs for the backlight of the display. The more strings you can use, the lower the boost voltage, and the better the efficiency. In this simple example, you can see the impact of using 2 strings to drive 8 LEDs instead on 1.

On average, you can save up to 4% of the power used in the display, just by changing the configuration of the LED strings. Using the LM3697’s flexibility of having up to 3 strings for backlight connections, allows designers to choose the right configuration to maximize their efficiency.

-John Woodward, Technical Marketing Engineer at Texas Instruments

Disclaimers of Warranties
1. The website does not warrant the following:
1.1 The services from the website meets your requirement;
1.2 The accuracy, completeness, or timeliness of the service;
1.3 The accuracy, reliability of conclusions drawn from using the service;
1.4 The accuracy, completeness, or timeliness, or security of any information that you download from the website
2. The services provided by the website is intended for your reference only. The website shall be not be responsible for investment decisions, damages, or other losses resulting from use of the website or the information contained therein<
Proprietary Rights
You may not reproduce, modify, create derivative works from, display, perform, publish, distribute, disseminate, broadcast or circulate to any third party, any materials contained on the services without the express prior written consent of the website or its legal owner.

Nichia’s Tunable 757 receives rave reviews from industry leaders, including the coveted LpS Best Sustainability Technology Award. Nichia, the leader in and inventor of the high-brightness LED, announced its game-changing single LES, tuna... READ MORE

Innovative tunable white, mid-power LED enables luminaire manufacturers to improve colour tuning, shrink optics and fixture profiles, while enabling new design options. Nichia, the leader in and inventor of the high-brightness LED, announces i... READ MORE