Multi-color display unit

• US 5,436,535 A
• Filed: 12/29/1992
• Issued: 07/25/1995
• Est. Priority Date: 12/29/1992
• Status: Expired due to Fees

• Current Assignee: Tai-Her Yang
• Original Assignee: Tai-Her Yang
• Inventors: Yang, Tai-Her
• Primary Examiner(s): Pascal, Robert J.
• Assistant Examiner(s): Philogene, Haissa
• Application Number:
  US07/998,403
• Time in Patent Office: 938 Days
• Field of Search: 315/313, 315/77, 315/161, 315/314, 315/362, 315/158, 315/312, 315/287, 315/307, 307/10.8, 313/512, 362/800
• US Class Current: 315/313
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes

Abstract

A multi-color display unit includes at least a first and second plurality of dot-type light sources, such as LED or small lamps, which are arranged in different geometrical patterns and may be powered in any desired order or combination thereof. Each plurality of dot-type light sources may be of different colors or may include color filters in combination with one-color dot-type light sources to form a multi-color display unit. The geometrical arrangement between those dot-type light sources may include bar-type, and/or circumferences, parallel or intersecting, and a combination with other geometrical patterns.

Claims

1. A multi-color display unit comprising:

at least a first and a second plurality of spaced-apart dot-type light sources, respectively;

said at least first and second plurality of dot-type light sources being arranged in respective at least first and second geometrical patterns; and

a controlling means coupled to said at least first and second plurality of said dot-type light sources, and enabling said at least first and second plurality of dot-type light sources, respectively, in any desired order and in any desired combination of said at least first and second geometrical patterns, wherein said first and second plurality of dot-type light sources are connected in parallel, and wherein said controlling means includes;

a first switching means connected between a power supply and said first plurality of dot-type light sources,

a second switching means connected between the power supply and said second plurality of dot-type light sources, and

an inhibiting circuit for said first plurality of dot-type light sources, said inhibiting circuit connected to said second plurality of dot-type light sources,

wherein said first switching means may be selectively opened to inhibit said second plurality of dot-type light sources to be lit,

wherein said first switching means may be selectively closed to pass power to said second plurality of dot-type light sources to light them and simultaneously to activate said inhibiting circuit to inhibit said first plurality of dot-type light sources to be lit,

wherein said second switching means may be selectively closed to pass power to said first plurality of dot-type light sources to light them while the first switching means are opened.

2. The multi-color display unit of claim 1, wherein said inhibiting circuit includes a relay, said relay comprising a pair of normally closed contacts in parallel with said first plurality of dot-type sources.

3. The multi-color display unit of claim 1, wherein said inhibiting circuit includes:

a first and a second transistor, said first and second transistor each having a base terminal, an emitter terminal and a collector terminal, respectively,

a diode having an anode and a cathode, and

a first, a second and a third bias resistance, respectively,

wherein said second and third bias resistances are connected in series to each other,

wherein said second and third bias resistances are connected in parallel with said second plurality of dot-type light sources,

wherein said second transistor is connected by the base terminal between the second and the third bias resistances, respectively,

wherein said first transistor is connected between said first plurality of dot-type light sources and a ground, the collector terminal of the first transistor being connected to said first plurality of dot-type light sources and the emitter terminal of the first transistor being connected to the ground,

wherein said diode is connected by the anode to the base terminal of said first transistor and by the cathode to the collector terminal of said second transistor,

wherein the emitter terminal of said second transistor is connected to the emitter terminal of said first transistor, and

wherein said first bias resistance is connected between the collector terminal of said second transistor and the collector terminal of said first transistor.

4. The multi-color display unit of claim 1, wherein said inhibiting circuit includes:

a relay connected in parallel to said second plurality of dot-type light sources, the relay having a pair of normally closed contacts,

a transistor connected by a collector terminal to said first plurality of dot-type light sources and by an emitter terminal to a ground,

a bias shunt resistance connected between the base terminal and the emitter terminal of said transistor, and

a bias resistance connected between the base terminal and the collector terminal of said transistor and controlled by said normally closed contacts.

5. The multi-color display unit of claim 1, wherein said at least first and second plurality of said dot-type light sources include light sources of at least a first and a second color, respectively, said at least first and second colors being different.

6. The multi-color display unit of claim 1, wherein said at least first and second plurality of dot-type sources includes dot-type light sources of identical color,

wherein said display unit further includes a housing and a plurality of colored filters,

wherein said housing includes respective apertures, each of said plurality of colored filters being received and secured in a respective one of said apertures, in precise registration with respective dot-type light sources to be colored.

7. The multi-color display unit of claim 6, wherein said colored filters are arranged in respective at least first and second geometrical patterns similar to and in precise registration with said at least first and second geometrical patterns of said at least first and second plurality of dot-type light sources.

8. The multi-color display unit of claim 1, wherein said at least first and second geometrical patterns include at least first and second bar-type geometrical patterns.

9. The multi-color display unit of claim 8, wherein said at least first and second bar-type geometrical patterns are parallel to each other.

10. The multi-color display unit of claim 8, wherein said at least first and second bar-type geometrical patterns intersect each other.

11. The multi-color display unit of claim 1, wherein said at least first and second geometrical patterns include at least a first and a second circumference.

12. The multi-color display unit of claim 11, wherein said at least first and second circumferences have a common center.

13. The multi-color display unit of claim 11, wherein said at least first and second circumferences intersect each other.

14. The multi-color display unit of claim 1, wherein said at least first and second geometrical patterns include at least one bar-type geometrical pattern intersecting with at least one circumference.

15. The multi-color display unit of claim 1, wherein said dot-type light sources include light emitting diodes.

16. The multi-color display unit of claim 6, wherein said colored filters include concave lens.

17. The multi-color display unit of claim 6, wherein said colored filters include convex lens.

18. A multi-color display unit comprising:

at least a first and a second plurality of spaced-apart dot-type light sources, respectively;

said at least first and second plurality of dot-type light sources being arranged in respective at least first and second geometrical patterns; and

a controlling means coupled to said at least first and second plurality of said dot-type light sources, and enabling said at least first and second plurality of dot-type light sources, respectively, in any desired order and in any desired combination of said at least first and second geometrical patterns, wherein said first and second plurality of dot-type light sources are connected in series between a power supply and a ground, and wherein said controlling means includes;

a first relay having a pair of normally closed contacts and connected to the ground,

a first switching means connected between a power supply and said first relay,said first switching means controlling said first relay,

a second relay having a common, a normally opened and a normally closed contact point, respectively, said first relay being connected by the common contact between said first and second plurality of dot-type light sources,

a second switching means connected between the power supply and said first plurality of dot-type light sources,

wherein said first switching means may be selectively opened to inhibit said second plurality of dot-type light sources to be lit,

wherein said first switching means may be selectively closed to activate said first relay to close normally opened contact of the second relay to energize said second plurality of dot-type light sources, and

wherein said second switching means may be selectively closed to pass power to said first plurality of dot-type light sources to light them while the first switching means being opened.

19. A multi-color display unit comprising:

at least a first and a second plurality of spaced-apart dot-type light sources, respectively;

said at least first and second plurality of dot-type light sources being arranged in respective at least first and second geometrical patterns; and

a controlling means coupled to said at least first and second plurality of said dot-type light sources, and enabling said at least first and second plurality of dot-type light sources, respectively, in any desired order and in any desired combination of said at least first and second geometrical patterns;

wherein said at least first and second plurality of said dot-type light sources may include light sources of at least a first and a second color, respectively, said at least first and second colors being different;

wherein said at least first and second plurality of dot-type sources may include dot-type light sources of identical color, and a plurality of colored filters in precise registration with respective dot-type light sources to be colored;

wherein said at least first and second geometrical patterns include at least one bar-type geometrical pattern and at least one circumference in any desired inter-position;

wherein said dot-type light sources include light emitting diodes;

wherein said colored filters include concave and convex lens;

wherein said first and second plurality of dot-type light sources are connected in parallel, and wherein said controlling means includes;

a first switching means connected between a power supply and said first plurality of dot-type light sources,

a second switching means connected between the power supply and said second plurality of dot-type light sources, and

an inhibiting circuit for said first plurality of dot-type light source, said inhibiting circuit connected to said second plurality of dot-type light sources,

wherein said first switching means may be selectively opened to inhibit said second plurality of dot-type light sources to be lit,

wherein said first switching means may be selectively closed to pass power to said second plurality of dot-type light sources to light them and simultaneously to activate said inhibiting circuit to inhibit said first plurality of dot-type light sources to be lit,

wherein said second switching means may be selectively closed to pass power to said first plurality of dot-type light sources to light them while the first switching means are opened.