US 5,703,609 A · Emulation of single line display with multi-line display driver

Abstract

A single-line 16 character display is driven using a display driver designed to drive two independent 8 character single-line displays. Conceptually, the 16 character display is treated as the two independent 8 character displays placed side by side. The message for display is placed in a first area of driver memory corresponding to the first 8 character display. A truncated version of the same message for display, with an offset at the beginning equal to the number of characters in the first display line, is stored in a second area of driver memory corresponding to the second 8 character display line. When the message and the truncated version thereof are simultaneously displayed, an observer views a single, coherent 16 character single line display. If the message is greater than 16 characters, the driver scrolls both the message for display and the truncated version thereof, creating a single scrolled message from the point of view of the observer.

Claims16

Dependent claims

A method for emulating a single line display of a predetermined length with a display driver for driving at least two independent single line displays, said display driver including a memory for storing at least two messages for display on said at least two independent single line displays, each of said at least two independent single line displays having a length less than said predetermined length, said method comprising steps of:

providing a single line display of said predetermined length;
storing a message for display in said memory;
displaying as much of said message for display as will fit in a first part of said single line display of said predetermined length;
and
displaying as much of a truncated version of said message for display as will fit in a second part of said single line display of said predetermined length adjacent said first part, said truncated version having an offset at a beginning of said message for display equal to a length of said first part, said display driver driving said single line display of said predetermined length.

2 more elements

A method for emulating a single line display of a predetermined length with a display driver for driving at least two independent single line displays, said display driver including a memory for storing at least two messages for display on said at least two independent single line displays, said at least two independent single line displays including a first display and a second display, each of said first display and said second display having a length less than said predetermined length, said method comprising steps of:

providing a single line display of said predetermined length;
storing a message for display in a first plurality of locations in said memory, said message for display having a length greater than said predetermined length;
storing a truncated version of said message for display in a second plurality of locations in said memory, said truncated version having an offset at a beginning of said message for display equal to a length of said first display;
displaying as much of said message for display stored in said first plurality of locations as possible in a first portion of said single line display of said predetermined length, said first portion having a length equal to said length of said first display;
displaying as much of said truncated version stored in said second plurality of locations as possible in a second portion of said single line display of said predetermined length, said second portion having a length equal to said length of said second display;
scrolling in said first portion said message for display stored in said first plurality of locations;
and
scrolling in said second portion said truncated version stored in said second plurality of locations.

5 more elements

Dependencies are inferred from the claim text.

Emulation of single line display with multi-line display driver

Life of this patent

Emulation of single line display with multi-line display driver

Life of this patent

Abstract

Claims16