Flashing LCD display system

• US 5,646,645 A
• Filed: 01/16/1996
• Issued: 07/08/1997
• Est. Priority Date: 12/22/1993
• Status: Expired due to Term

• Current Assignee: Nikon Corporation
• Original Assignee: Nikon Corporation
• Inventors: Saegusa, Takashi
• Primary Examiner(s): BRIER, JEFFERY A
• Application Number:
  US08/585,688
• Time in Patent Office: 539 Days
• Field of Search: 345/101
• US Class Current: 345/101
• CPC Class Codes: G09G 2320/041 Temperature compensation
• CPC Class Codes: G09G 3/18 using liquid crystals

Abstract

A dot matrix LCD system able to provide a flashing effect having a control unit to output a signal indicative of a symbol to be displayed and a reversal signal indicative of whether the symbol is to be displayed in the reverse. A first memory unit connected to the control unit stores the symbol to be displayed, and a second memory unit connected to the control unit stores an indication of whether the symbol is to be displayed in the reverse. A character generator connected to the first memory unit generates a pattern of dots based on the indication stored in the first memory unit, while a pattern memory unit connected to the character generator stores the pattern of dots. An LCD display unit having a plurality of display dots, is driven by a driver to illuminate the display dots, corresponding to the pattern. A temperature detection circuit detects ambient temperature. A reversal operation unit connected between the pattern memory unit and the driver transmits the pattern from the pattern memory unit to the driver. The reversal operation unit reverses the pattern based on the indication stored in the second memory unit and reverses the pattern at a rate which is dependent upon the ambient temperature detected.

Claims

1. A dot matrix display system comprising:

an LCD display unit;

a temperature detection circuit which detects an ambient temperature; and

a drive unit adapted to cause said LCD unit to create a rapid flashing effect by alternately presenting a normal pattern and a reverse pattern, each pattern being displayed for a period of time based on the ambient temperature detected by said temperature detection circuit.

2. A dot matrix display system comprising:

an LCD display unit;

temperature detection means for detecting an ambient temperature; and

a drive means for causing said LCD display unit to create a rapid flashing effect by alternately presenting a normal pattern and a reverse pattern, each pattern being displayed for a period of time determined by the ambient temperature.

3. An LCD display system comprising:

a temperature detection circuit which detects an ambient temperature; and

a drive unit adapted to cause said LCD display unit to create a rapid flashing effect by alternately presenting a normal pattern and a reverse pattern, each pattern being displayed for a period of time based on the ambient temperature detected by said temperature detection circuit.

4. An LCD display system comprising:

temperature detection means for detecting an ambient temperature; and

a drive means for causing said LCD display system to create a rapid flashing effect by alternately presenting a normal pattern and a reverse pattern, each pattern being displayed for a period of time determined by the ambient temperature.