High Performance Addressing Displays (HPA)

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Technology Description

High Performance Addressing displays (HPA) usher in a whole new era in notebook display technology. Consumers will enjoy exceptional display quality for a fraction of the cost of expensive Active Matrix displays (TFT). All types of applications will look better and users will be able to make more compelling multimedia presentations, with more vibrant color and clarity than notebooks with older display technology.

The advances used by HPA display produce crisper, brighter images that are comparable to Active Matrix TFT displays. The HPA displays have superb contrast ratios of approximately 40:1 and response times of 150ms or greater. The combination of better response time, high contrast ratios, and low cost provides for an excellent TFT alternative. Resolutions up to 800x600 (SVGA) are supported in all notebook configurations. HPA technology uses a combination of several factors to improve display performance. The cell gap (which holds the liquid crystal material) is narrower and has lower viscosity liquid. This results in a material that responds faster to changing data. In addition, a special modulation technique is used to regulate the voltage applied to pixels on the screen depending on their location. This minimizes shadowing. Finally, a higher refresh rate is applied to increase contrast. Added together, all these elements act to dramatically improve contrast ratio, image clarity, shadowing and response time.


Key Supporting Features :

Brighter Display:

The HPA displays graphics brighter than previous Compaq High Contrast displays. (Approximately 75 nits)

Faster Response:

HPA displays close the gap on TFT Active Matrix displays with response times of 150ms or less, compared to response times of 100ms � 50ms with TFT displays.

mportant note: Information in this technology overview is subject to change without notice. Compaq Computer Corporation shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential damages resulting from the furnishing, performance, or use of the material. Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies.