software patents pose a constant threat to the existence of any free program. We wish to make sure that a company cannot effectively restrict the users of a free program by obtaining a restrictive license from a patent holder. Therefore, we insist that any patent license obtained for a version of the library must be consistent with the full freedom of use specified in this license. Most GNU software, including some libraries, is covered by the ordinary GNU General Public License.

This license, the GNU Lesser General Public License, applies to certain designated libraries, and is quite different from the ordinary General Public License. We use this license for certain libraries in order to permit linking those libraries into non-free programs. When a program is linked with a library, whether statically or using a shared library, the combination of the two is legally speaking a combined work, a derivative of the original library. The ordinary General Public License therefore permits such linking only if the entire combination fits its criteria of freedom. The Lesser General Public License permits more lax criteria for linking other code with the library. We call this license the "Lesser" General Public License because it does Less to protect the user's freedom than the ordinary General Public License. It also provides other free software developers Less of an advantage over competing nonfree programs. These disadvantages are the reason we use the ordinary General Public License for many libraries. However, the Lesser license provides advantages in certain special circumstances.

For example, on rare occasions, there may be a special need to encourage the widest possible use of a certain library, so that it becomes a de-facto standard. To achieve this, non-free programs must be allowed to use the library. A more frequent case is that a free library does the same job as widely used non-free libraries. In this case, there is little to gain by limiting the free library to free software only, so we use the Lesser General Public License. In other cases, permission to use a particular library in nonfree programs enables a greater number of people to use a large body of free software. For example, permission to use the GNU C Library in non-free programs enables many more people to use the whole GNU operating system, as well as its variant, the GNU/Linux operating system.

Although the Lesser General Public License is Less protective of the users' freedom, it does ensure that the user of a program that is linked with the Library has the freedom and the wherewithal to run that program using a modified version of the Library. The precise terms and conditions for copying, distribution and modification follow. Pay close attention to the difference between a "work based on the library" and a "work that uses the library". The former contains code derived from the library, whereas the latter must be combined with the library in order to run.

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InFocus IN5135C, IN5134C, IN5132C, IN5144C, IN5142C, IN5145C user manual
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IN5145C, IN5142C, IN5144C, IN5132C, IN5134C specifications

The InFocus IN5144C, IN5135C, IN5132C, IN5145C, and IN5142C represent a sophisticated lineup of projectors designed to meet the demands of both professional and educational environments. Each model boasts unique features and specifications, making them suitable for a variety of presentation needs.

The IN5144C stands out with its powerful brightness of 5,500 lumens, making it an excellent choice for large venues with high ambient light. This model features WUXGA resolution (1920 x 1200), ensuring that detailed graphics and text are displayed crisply. The IN5144C employs DLP technology, which provides vibrant colors and sharp images, alongside a robust contrast ratio that enhances the viewing experience. Its diverse connectivity options, including HDMI, VGA, and USB, make it versatile for different media sources.

In contrast, the IN5135C is designed for slightly smaller settings. With a brightness of 5,000 lumens and XGA resolution (1024 x 768), this projector is perfect for classrooms and conference rooms. It offers similar DLP technology and features a quick startup time for presentations on the go, ensuring you spend less time setting up and more time delivering impactful content.

Meanwhile, the IN5132C serves as a compact option, maintaining a brightness of 4,300 lumens and XGA resolution. This model focuses on portability without compromising on performance. The lightweight design and easy-to-navigate menus make it user-friendly, allowing presenters to switch between different input sources effortlessly.

The IN5145C is a feature-rich option that combines 5,200 lumens brightness with WUXGA resolution, catering specifically to those who require high-performance in varied lighting conditions. Its advanced lamp life and high-efficiency cooling system ensure longer use and less maintenance downtime, making it a reliable choice for continuous operation.

Lastly, the IN5142C balances power and flexibility, featuring 5,000 lumens brightness while also supporting 4K input. This makes it ideal for displaying high-definition content in larger venues, while its built-in network capabilities allow for remote management and monitoring of projector status.

Together, these models provide a comprehensive range of options for anyone seeking reliable and high-quality projection solutions, whether for business, education, or home theater use. With their advanced technologies, including DLP projection, varied brightness levels, and multiple connectivity options, InFocus projectors ensure that presentations are not only engaging but also visually compelling.
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