Light-driven display device
First Claim
Patent Images
1. An LED display device comprising:
- a meter having a plurality of photoconductor elements each having a longitudinal direction, a first longitudinal end and first and second opposing sides facing a substantially perpendicular direction to said longitudinal direction, each photoconductor element being of an elongated shape, and being disposed side by side in a fixed direction;
an emitting element having a plurality of LEDs respectively arranged at said first longitudinal end of each photoconductor element, so as so emit light in said longitudinal direction; and
a reflection element provided on said first opposing side of each photoconductor element for reflecting the light emitted in said longitudinal direction in a direction substantially perpendicular to said longitudinal direction;
an emission control element for driving each said LED at a time of a fixed warning so as to communicate an emission control warning, said emission control element including a sensing circuit for detecting a quantity of light entering the meter and an luminance control circuit for changing a quantity of light of each said LED to change a luminance of the meter according to the quantity of light detected by said sensing circuit, whereintwo or more colors of LEDs are provided for the meter, and whereinsaid emission control element selectively combines the LEDs to be lit so as to illuminate the meter with a desired color, and whereinsaid sensing circuit comprises a photo detecting sensor comprising an LED not being operated to emit light into the meter.
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Abstract
An LED display device has an indicator having a housing. The housing has at least one incident portion which receives light from at least one LED. The incident portion has a reflection surface at its inside surface. LEDs emit light from one side or one longitudinal end of the incident portion. A refraction plate may be provided to direct emission of the incident light for viewing by a user.
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Citations
14 Claims
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1. An LED display device comprising:
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a meter having a plurality of photoconductor elements each having a longitudinal direction, a first longitudinal end and first and second opposing sides facing a substantially perpendicular direction to said longitudinal direction, each photoconductor element being of an elongated shape, and being disposed side by side in a fixed direction; an emitting element having a plurality of LEDs respectively arranged at said first longitudinal end of each photoconductor element, so as so emit light in said longitudinal direction; and a reflection element provided on said first opposing side of each photoconductor element for reflecting the light emitted in said longitudinal direction in a direction substantially perpendicular to said longitudinal direction; an emission control element for driving each said LED at a time of a fixed warning so as to communicate an emission control warning, said emission control element including a sensing circuit for detecting a quantity of light entering the meter and an luminance control circuit for changing a quantity of light of each said LED to change a luminance of the meter according to the quantity of light detected by said sensing circuit, wherein two or more colors of LEDs are provided for the meter, and wherein said emission control element selectively combines the LEDs to be lit so as to illuminate the meter with a desired color, and wherein said sensing circuit comprises a photo detecting sensor comprising an LED not being operated to emit light into the meter. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14)
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7. An LED display device comprising:
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an indicator having a plurality of photoconductor pieces each having a longitudinal direction, first and second longitudinal ends and first and second opposing sides facing a substantially perpendicular direction to said longitudinal direction, each photoconductor piece being of an elongated shape, and being disposed side by side in a fixed direction; an emitting element having a plurality of LEDs respectively arranged at said first longitudinal end of each said photoconductor piece, so as to emit light into each said photoconductor piece in said longitudinal direction; a reflection element provided on said first opposing side of each photoconductor piece for reflecting the light emitted in said longitudinal direction in a direction substantially perpendicular to said longitudinal direction; and a printed board on which each said LED is arranged in a predetermined line shape according to a variable so as to define an LED array, wherein said indicator includes a lens array formed in a line shape corresponding to said LED array, said lens array having diffuse radiation lens elements arranged corresponding to each said LED of said LED array, respectively, wherein each of the diffuse radiation lens elements is shaped into a substantially square column and comprises an incident side having a fitting recess for fitting each said LED therein at a first side facing each said LED, a first reflection surface at a second side facing said incident side, a second reflection surface at said first side facing said first reflection surface and an emitting side at said second side facing said second reflection surface, each said LED emitting light into said incident side so that said first and second reflection surfaces reflect the light to said emitting side and said emitting side diffuses and radiates the light.
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Specification