Stephen B Preston

Title: The Innovations of Stephen B Preston

Introduction

Stephen B Preston is a notable inventor based in Spring, Texas. He has made significant contributions to the field of graphics technology, holding three patents to his name. His work has had a lasting impact on how graphics are rendered and displayed in various systems.

Latest Patents

One of his latest patents is titled "Circuitry and method for high visibility cursor generation in a graphics." This invention involves a graphics subsystem that includes a video digital-to-analog converter. A high-speed oscillator generates a pixel clock signal at the frequency at which pixels are to be displayed. The video DAC features a frequency divider that presents an output clock signal with a period that is a multiple of the pixel clock signal. This multiple corresponds to the level of multiplexing of pixel data provided by the video DAC. The video controller in the system receives the output clock signal and generates clock signals to control the serial port of the frame memory. It also controls the latching of the first stage in the video DAC. The first stage latch in the video DAC latches multiple pixel data from the frame memory. The multiplexer in the video DAC presents the data to the color palette RAM, or around the color palette RAM in true-color non-multiplexed mode, according to the pixel clock signal. Highlighted pixels in a cursor are displayed by inverting the output of the color palette RAM at cursor locations. This is achieved through an exclusive-OR function of the color palette RAM output and a bit corresponding to the comparison of the display location and the desired cursor location. The inversion of the output of the color palette RAM results in higher contrast pixels within the cursor.

Career Highlights

Throughout his career, Stephen has worked with prominent companies such as Compaq Computer Corporation. His experience in these organizations has allowed him to refine his skills and contribute to innovative projects in the technology sector.

Collaborations

Stephen has collaborated with notable individuals in his field, including Paul B Wood and Thomas M Albers. These collaborations have further enriched his work and expanded his contributions to the industry.

Conclusion

Stephen B Preston is a distinguished inventor whose work in graphics technology has led to significant advancements. His patents and collaborations reflect his dedication to innovation and excellence in his field.