Electronic display device

• US 5,432,496 A
• Filed: 04/14/1994
• Issued: 07/11/1995
• Est. Priority Date: 04/12/1994
• Status: Expired due to Fees

• Current Assignee: Kuo-Lung Lin
• Original Assignee: Kuo-Lung Lin
• Inventors: Lin, Kuo-Lung
• Primary Examiner(s): Peng, John K.
• Assistant Examiner(s): Pope, Daryl C.
• Application Number:
  US08/227,409
• Time in Patent Office: 453 Days
• Field of Search: 340/461, 340/467, 340/479, 340/525, 340/457.4, 340/457, 340/815.4, 362/80.1, 362/83.1, 364/708, 40/900
• US Class Current: 340/468
• CPC Class Codes: B60Q 1/50 for indicating other intentions or conditions, e.g. request for waiting or overtaking
• CPC Class Codes: B60Q 1/5035 electronic displays
• CPC Class Codes: Y10S 40/90 Mirror that has changing effect

Abstract

An electronic display device includes a housing having a sliding slot, an electronic display board received inside the housing and moved to extend out of the housing through the sliding slot, the electronic display board having a digital display screen on a front side thereof for display a telephone number or the like and a keyboard on a back side thereof for inputting the telephone number or the like to be displayed, and a motor-driven transmission mechanism controlled to move the electronic display board in or out of the housing.

Claims

1. An electronic display device comprising:

a housing having a slotted through opening formed therein;

an electronic display board slidably disposed within said housing and extendable from said housing through said slotted through opening, said electronic display board comprising a digital display screen disposed on a front side thereof, a keyboard disposed on a back side thereof for inputting series of numbers for display on said digital display screen, a rack formed on one lateral side thereof, and a rod member extending from an opposing lateral side thereof;

a transmission mechanism installed inside said housing and controlled to move said electronic display board in and out of said housing, said transmission mechanism comprising a reversible motor having a worm gear mounted on an output shaft thereof, a transmission gear having an input gear meshed with said worm gear and an output gear meshed with said rack;

a control circuit disposed within said housing having an output coupled to said reversible motor for controlling a rotational direction of said motor output shaft, said rotational direction being reversed responsive to a control signal; and

,

two limit switches mounted inside said housing at different elevations and adjacent one lateral side of said electronic display, said limit switches being coupled to an input of said control circuit, one of said two limit switches being located in relation to said extension rod of said electronic display board to be operated by said extension rod when said electronic display board is fully extended from said housing and provide said control signal, another of said two limit switches being located in relation to said extension rod to be operated by said extension rod when said electronic display board is fully retracted and thereby provide said control signal.

2. The electronic display device of claim 1 wherein said housing is the casing of an automobile rear view mirror.

3. The electronic display device of claim 1 wherein said housing is the casing of an automobile'"'"'s third stop light.