Saratoga, CA, United States of America

Robert Arthur Sprague

This inventor holds 127 USPTO granted patents and 6 published patent applications, plus 1 CIPO patent and 1 EPO patent, primarily in Electrophoretic Displays (CPC class G02F1-167). Top assignees: Xerox Corporation, Sipix Imaging, Inc., Amazon Technologies, Inc.. Active years: 1980-2023.

USPTO Granted Patents = 127 

% Patents Active = 90.6


 

Average Co-Inventor Count = 2.1

ph-index = 41

Forward Citations = 4,916(Granted Patents)

Forward Citations (Not Self Cited) = 4,571(Dec 10, 2025)


Inventors with similar research interests:

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Company Filing History:


Years Active: 1980-2023

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Areas of Expertise:
Electrophoretic Displays
Tunable Lenses
Borderless Designs
High Contrast Frontlight
Astigmatic Correction
Bi-Stable Displays
Display Components
Projection Systems
Color Display Devices
Additive Particles
Flexible Displays
Display Stack
127 patents (USPTO):Explore Patents

Title: Robert Arthur Sprague: A Pioneer in Optics and Display Technologies

Introduction:

In the dynamic world of innovations and patents, few individuals stand out due to their remarkable contributions and expertise. One such luminary is Robert Arthur Sprague, a visionary inventor and optical engineer based in Saratoga, California. With an impressive track record of 126 patents, Sprague has significantly impacted the field of optics and display technologies. This article delves into his latest patents, career highlights, collaborations, and sheds light on his notable accomplishments.

Latest Patents:

Robert Arthur Sprague's recent patents exhibit his profound understanding and groundbreaking work in the field of optics. One of his latest inventions is the "Tunable Liquid Crystal Lens with Electrically Tunable Axis of Astigmatism." This invention involves an optical system consisting of concentric pattern electrodes, liquid crystal material, and a two-dimensional pattern of electrodes. By manipulating electrical signals, this lens can actively control the axis of astigmatism, enabling versatile adjustments to the focal length and optical characteristics.

Another noteworthy creation by Sprague is the "Wide Lateral Angle Frontlight for Use with Reflective Displays." This patent introduces a novel technique to generate a wide-angle frontlight suitable for reflective displays. By employing a combination of light sources and refractive devices, this technology illuminates reflective displays from various angles, significantly enhancing visibility and readability.

Career Highlights:

Sprague's career has been marked by remarkable achievements in prominent companies at the forefront of technological advancements. He has made significant contributions during his tenure at Xerox Corporation and Sipix Imaging, Inc. (formerly known as SiPix Imaging, Inc.). At these renowned organizations, Sprague spearheaded research and development efforts, pushing the boundaries of display technologies and making valuable contributions to patent portfolios.

Collaborations:

Throughout his career, Robert Arthur Sprague has collaborated with numerous talented individuals, fostering innovation and accelerating technological advancements. Notable among his coworkers are Craig Lin and Yajuan Chen, who have played crucial roles in collaborative research and development projects. These collaborations have resulted in groundbreaking inventions and patents, showcasing the power of teamwork in driving transformative innovation.

Conclusion:

Robert Arthur Sprague has carved a significant niche for himself in the field of optics and display technologies. His impressive patent portfolio, including patents such as the tunable liquid crystal lens and wide lateral angle frontlight, demonstrate his ingenious contributions. Sprague's work at renowned companies like Xerox Corporation and Sipix Imaging, Inc. further solidifies his reputation as a pioneering figure in the industry. With his continued dedication to innovation, Sprague is sure to make further strides, revolutionizing optics and display technologies for years to come.

(Note: The information provided in this article is based on the given data and may not encompass the entirety of Robert Arthur Sprague's contributions and career.)

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