Texas Instruments TI-89 Tip List page 26

5,168,294 Display demonstration system for providing enlarged projected image of calculator
display
[magnifying device for View Screen]
Inventor(s): Davis; Peter H.; Christensen; Brad V.; Ahlfinger; Robert R.
Issued/Filed Dates: September 27, 1991 / December 1, 1992
A calculator or other computing device uses a remote display set upon an elevated platform above
the base of an overhead projector. Light through the base lens is passed through the display and is
enlarged by lens.
5,392,081 Calculator projection display
[ViewScreen]
Inventor(s): Tarnay; Thomas N.; Wyatt; W. Gerald
Issued/Filed Dates: February 21, 1995 / September 29, 1993
A projection display for an electronic data processing device for use in conjunction with an
overhead projector is provided. The projection display includes a display with a light transmitting
screen, and the screen is framed by a uniquely constructed housing. The housing defines a free
convection air channel below the screen to conduct a cooling air flow. The air flow in the free
convection air channel substantially eliminates the problem of image deterioration due to screen
overheating.
5,532,946 Calculator with table generation capability
[TI-82 table, feature also on 89/92+/V200]
Inventor(s): Phipps; Ann E.; Santucci; David M.
Issued/Filed Dates: July 2, 1996 / September 11, 1995
A digital computer or calculator is equipped with a numerical data table generation capability. It
provides a user with the ability to specify one or more mathematical functions, and the ability to
specify how the numerical data in support of the functions are to be displayed.
5,377,130 Method and apparatus for solving terms of a numerical sequence
[sequence graphing mode solving algorithm]
Inventor(s): Frank; Olivier L.; Phipps; Ann E.
Issued/Filed Dates: January 26, 1993 / December 27, 1994
A digital computer is provided for generating a solution of a term of a numerical sequence. The
digital computer includes a memory. The memory has stored within it solving instructions of a
sequence-solving program and recognizing instructions for recognizing the type of numerical
sequence. The digital computer also includes a processor for executing the solving instructions and
recognizing instructions. An input device receives data from a user. The data represents a
mathematical expression of the numerical sequence. The data also represents a value of a term
identifier representing the term of the numerical sequence to be solved. A display is also provided
for displaying the solution of the term.
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