US 5,741,058 AGranted

LED display device

AssigneeToyoda Gosei Co., Ltd.

InventorsAkihiko Suzuki, Makoto Tamaki, Takemasa Yasukawa, Osamu Yamanaka, Tadanobu Iwasa

Life of this patent

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Abstract

An LED display device having an LED array for a meter on a printed circuit board. A diffusing radiation lens array is disposed facing the LED array. A cover lens is overlapped on the lens array. The cover lens transmits LED light which passed through the lens array. The cover lens has at least a scale mark, a character and a sign. A sheet is interposed between the lens array and the cover lens. The sheet limits radiation of predetermined diffused light from the lens array while partially transmitting the diffused light. The cover lens has a scale mark dent and a character dent formed on its rear interior surface, and displays the scale mark and character by means of an LED light from another LED array.

Claims23

Dependent claims

A display device having a front side, a rear side and a display area, comprising:

a printed circuit board;
a first LED array including a plurality of LEDs disposed on said printed circuit board at a position corresponding to said display area;
a lens array including a plurality of lens elements, each of said lens elements having an incident surface facing at least one of said plurality of LEDs in said first LED array and a radiant surface diffusing incident light entering said incident surface so as to radiate said light toward said front side of said display device;
a cover lens disposed on said lens array at said front side of said display device, said cover lens having an end;
and
a second LED array including a plurality of LEDs disposed on said printed circuit board such that said second LED array radiates light into said end of said cover lens;
said cover lens transmitting incident light from said plurality of LEDs of said second LED array from said end of said cover lens generally toward said lens array at said front side of said display device.

4 more elements

A display device having a front side and a rear side, comprising:

a printed circuit board;
an illuminating LED array including a plurality of LEDs disposed on said printed circuit board;
and
a cover lens of a transparent material having an end facing said illuminating LED array, a front surface facing said front side of said display device and a rear surface facing said rear side of said display device, said cover lens transmitting light of said illuminating LED array from the end;
and
said cover lens having at least one of a scale mark, a character and a sign defined by a hollow located at said rear surface of said cover lens such that at least one of said scale mark, character and sign is displayed by said illuminating LED array.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/688,837Filed 31 Jul 1996
Priority: JP 7-19561531 Jul 1995
Granted: 21 Apr 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

G09F 27/008
Combined visual and audible advertising or displaying, e.g. for public address: sun shades, shades, hoods or louvres on electronic displays to…
B60K 35/21
Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor: using visual output, e.g.…
B60K 35/28
Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor: characterised by the type of the…
B60K 35/60
Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles: instruments characterised by their location or relative…