The Unix configuration script "configure" was produced with GNU Autoconf. It is copyright by the Free Software Foundation but is freely distributable. The same holds for its supporting scripts (config.guess, config.sub, ltconfig, ltmain.sh). Another support script, install-sh, is copyright by M.I.T. but is also freely distributable.

It appears that the arithmetic coding option of the JPEG spec is covered by patents owned by IBM, AT&T, and Mitsubishi. Hence arithmetic coding cannot legally be used without obtaining one or more licenses. For this reason, support for arithmetic coding has been removed from the free JPEG software. (Since arithmetic coding provides only a marginal gain over the unpatented Huffman mode, it is unlikely that very many implementations will support it.) So far as we are aware, there are no patent restrictions on the remaining code.

The IJG distribution formerly included code to read and write GIF files. To avoid entanglement with the Unisys LZW patent, GIF reading support has been removed altogether, and the GIF writer has been simplified to produce "uncompressed GIFs". This technique does not use the LZW algorithm; the resulting GIF files are larger than usual, but are readable by all standard GIF decoders.

We are required to state that "The Graphics Interchange Format(c) is the Copyright property of CompuServe Incorporated. GIF(sm) is a Service Mark property of CompuServe Incorporated."

libpng

This projector product includes the open source software program "libpng" which applies the terms and conditions provided by owner of the copyright to the "libpng".

The "libpng" are WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

List of libpng programs

•libpng-1.2.49

•libpng-1.2.18

License terms of conditions of each program which are provided by owner of the copyright to the "libpng" are as follows.

This copy of the libpng notices is provided for your convenience. In case of any discrepancy between this copy and the notices in the file png.h that is included in the libpng distribution, the latter shall prevail.

COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:

If you modify libpng you may insert additional notices immediately following this sentence.

This code is released under the libpng license.

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Epson 1975W, 1970W, 1985WU, 1980MWU manual Libpng
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1975W, 1980MWU, 1985WU, 1970W specifications

The Epson 1970W, 1985WU, 1980MWU, and 1975W projectors represent a robust lineup in the realm of portable projection technology, designed to meet a variety of professional and educational needs. These models are characterized by their versatile features, advanced technologies, and impressive specifications, making them ideal for business presentations, classrooms, and home entertainment.

The Epson 1970W is renowned for its exceptional brightness, boasting up to 4,500 lumens, which ensures clear and vivid images even in well-lit environments. It utilizes 3LCD technology, ensuring vibrant color fidelity and detailed visuals. The 1970W also supports WXGA resolution, providing 1280 x 800 pixel clarity, making it suitable for displaying text-rich presentations and intricate graphics with ease.

Following closely is the Epson 1985WU, which further elevates the projection experience with native WUXGA resolution at 1920 x 1200 pixels. This model is particularly effective for high-definition content, offering enhanced clarity for detailed images. The 1985WU also features an impressive brightness of 5,000 lumens, ensuring excellent performance across various lighting conditions. This projector incorporates wireless capabilities, allowing users to share presentations effortlessly from laptops or smart devices, enhancing its convenience in collaborative settings.

The Epson 1980MWU combines high brightness with mobility, perfectly suited for on-the-go professionals. With 4,400 lumens of brightness and WUXGA resolution, it delivers sharp images while maintaining portability. This model boasts an innovative design with easy setup features, including automatic keystone correction, allowing for quick adjustments during presentations. Its extensive connectivity options, including HDMI and USB ports, enhance usability, making it a versatile choice for diverse applications.

Lastly, the Epson 1975W caters to those who prioritize flexibility and ease of use. This model features 4,200 lumens of brightness and WXGA resolution, providing a commendable balance between clarity and vivacity. The 1975W is equipped with advanced features such as vertical/horizontal keystone correction and lens shift, which help simplify setup in various environments. Furthermore, it includes a robust suite of connectivity options, supporting seamless integration with various devices and ensuring that users can present with minimal fuss.

Together, the Epson 1970W, 1985WU, 1980MWU, and 1975W models showcase a powerful combination of brightness, resolution, and innovative technology. Whether for professional, educational, or personal use, these projectors deliver high-quality performance, catering to the diverse needs of today's users.
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