JPH0939609A - Light emitting diode display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unique designing effect and to reduce cost in manufacturing engineering. SOLUTION: Diffusional radiationlens elements 20A, 20B forming a diffusional radiation lens row are radiantly formed around two side surfaces 20e, 20f continuing from an incidence end part 20a to a radiant end part 20d vertically as the same center, and additionally, a first reflective surface 20b is formed on an upper part facing the incidence end part 20a and a second reflective surface 20c is formed on a lower part facing the radiant end part 20d. Thereafter, the maximum interval of the two radiant side surfaces 20e, 20f of the incidence end part 20a is made larger than the maximum interval of the two radiant side surfaces 20e, 20f of the radiant end part 20d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode display device in which light emitting diodes (hereinafter simply referred to as "LEDs") such as speedometers and tachometers of automobiles are collectively arranged and used as a measuring instrument. ,
The present invention relates to a light emitting diode display device in which an LED is used to freely emit a scale and a pointer.

[0002]

2. Description of the Related Art In general, a magnetic type speedometer is used as a meter housed in a conventional LED display, and this kind of meter displays a speed by rotating a dial, a pointer and the pointer. It is equipped with a drive unit that allows the variable to be indicated on the scale of the dial with a pointer. On the other hand, a vehicle meter such as a speedometer functions as a component of the interior of the vehicle, in addition to the function of transmitting man-machine information such as speed. The vehicle meter occupies the main part of the instrument panel, which is the most noticeable part of the driver, and its design is also important.In recent years, due to the diversification of the user's taste and sensitivity, various Various attempts have been made on the configuration of the meters themselves, their arrangement, and the like.

[0003]

However, the design of the conventional instrument panel is specified, and the design cannot be changed according to the individual taste of the user. Further, the conventional design including the dial and the pointer as the mechanical component cannot meet the diversified taste of the user, and there is room for improvement in terms of design.

Further, in a circular or arc-shaped meter such as various meters of an instrument panel of a vehicle, it is necessary to arrange the LEDs in an annular shape, which is inevitably expensive in manufacturing technology.

Therefore, an object of the present invention is to provide a light emitting diode display device which can be expected to have a unique design effect and can be manufactured at a low cost.

[0006]

According to a first aspect of the present invention, there is provided a light emitting diode display device having a diffusion end having an incident end facing a row of LEDs arranged on a printed circuit board and a radiation end for diffusing and radiating the incident light. In a light emitting diode display device including a radiation lens array, the diffusion radiation lens element forming the diffusion radiation lens array has two surfaces continuous from the entrance end to the top and bottom of the radiation end and formed radially with the same center, A reflecting surface is formed on an upper portion facing the incident end portion, and another reflecting surface is formed on a lower portion facing the emitting end portion, and the maximum distance between two radial surfaces of the incident end portion is set to the emitting end portion. It is larger than the maximum distance between the two radial surfaces of the part.

According to a second aspect of the present invention, there is provided a light emitting diode display device including a diffused emission lens array having an incident end portion facing a light emitting diode row arranged on a printed circuit board and a radiation end portion for diffusing and emitting the incident light. In the light emitting diode display device, the diffused emission lens element forming the diffused emission lens array has a reflective surface on an upper portion facing the incident end portion, and another reflective surface on a lower portion opposite the emission end portion. It was formed.

In the diffused emission lens element of the light emitting diode display device according to the third aspect, the both reflecting surfaces are rough surfaces.

The diffused emission lens element of the light emitting diode display device according to claim 4 is coated with a metal except for the incident end portion and the emission end portion.

According to a fifth aspect of the present invention, in the light emitting diode display device, the diffused radiation lens element is coated with white paint except the incident end portion and the radiation end portion.

In the light emitting diode display device according to a sixth aspect of the present invention, the incident end portion of the diffused emission lens element is provided with a fitting hole into which the light emitting diode is inserted.

According to a seventh aspect of the present invention, there is provided a light emitting diode display device in which a light emitting diode is integrally molded at an incident end portion of the diffused emission lens element.

[0013]

Embodiments of the present invention will be described below.

FIG. 1 is a front view of a light emitting diode display device according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line X--X of the light emitting diode display device according to the embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the section line Y-Y of the light emitting diode display device according to the embodiment of the present invention. FIG. 4 is a front view showing the LED arrangement of the printed circuit board in the light emitting diode display device according to the embodiment of the invention.
FIG. 5 is a front view showing the arrangement of diffused radiation lenses in a light emitting diode display device according to an embodiment of the present invention, and FIG. 6 is a front view showing a light emitting diode display device according to an embodiment of the present invention.
It is the top view and front view which show the structure of the kind of diffuse radiation lens element.

1 to 3, the housing 50
Is a component that accommodates various meters, and serves as a frame body for various meters. If the number of meters is one, it is 1
This is a frame body for a number of meters, and in the case of several meters, a frame for a few meters. A printed circuit board 60 is arranged at the bottom of the housing 50. On the printed circuit board 60, although not shown, a drive circuit for emitting a predetermined number of LEDs of the present embodiment, an AD conversion circuit for converting an input analog signal into a digital signal, and an LED.
A code conversion circuit or the like for emitting a predetermined number of lights is mounted. In particular, the printed circuit board 60 mounts a circuit and electronic components that generate heat, and the heat is radiated at the bottom of the housing 50. Therefore, in the present embodiment, the measurement LED columns 11, ...
It is possible to minimize the heat source of the printed circuit board 10 on which the 16 is arranged.

Further, in this embodiment, the printed circuit board 60 is used.
A printed circuit board 10 is provided in the housing 50 on the upper surface of the printed circuit board 10 with a predetermined distance from the printed circuit board 60. On the printed circuit board 10, a plurality of LEDs corresponding to the diffused radiation lens (20) composed of the individual diffused radiation lens element 20A or the diffused radiation lens element 20B in the present embodiment are mounted.

That is, the LED row 11 formed around 270 degrees for the indicating meter A such as a tachometer and the function display LEDs 11a and 11b for displaying the function thereof, and about 270 degrees for the indicating meter B such as a speedometer. LED array 12 formed around the LED and a function display LED for displaying its function
12a, an LED row 13 formed on the upper left side of the LED meter 13 for the indicating meter C such as an oil pressure gauge and the like, a function display LED 13a for displaying the function thereof, a fuel gauge provided on the lower left side thereof, and the like. Of the LED meter 14 for indicating the indicator D, the function indicator LED 14a for displaying the function thereof, and the indicator meter E such as a voltmeter provided on the upper right side thereof. LE formed around
Function LED 15 for displaying the D column 15 and its function
a, an indicating meter F such as a water temperature gauge provided on the lower right side thereof
It has an LED row 16 formed around about 90 degrees and a function display LED 16a for displaying its function. LEDs 16 are arranged in each of the LED arrays 11, ..., 16 for each unit of measurement instruction to be expressed, which is called a predetermined resolution. LED row 11 for these measurements, ...
Around the circumference of 16, a predetermined number of illumination LED rows 10A for input to the lens cover 40 are arranged so as to obtain an arbitrary brightness all around. That is, the LED array 10A for illumination that is input to the lens cover 40 is
Since the character or mark or the like engraved on the lens cover 40 does not emit light, the arrangement position and the number thereof are determined by the character or mark or the like to emit light.

In addition, between the LED row 11 for the indicating meter A such as a tachometer and the LED row 12 for the indicating meter B such as a speedometer, an LED 17 for a direction indicator is provided above.
R and 17L are LEs for indicating meter A such as tachometer
LE for D row 11 and indicating meter B such as speedometer
An LED 1 for displaying an abnormality is displayed in the middle and lower part of the row D 12.
8 and 19 are provided.

The printed circuit board 10 of this embodiment is a multi-layered printed circuit board, and includes LED columns 11 ,.
.., 16 and the LED row 10A for illumination are arranged so as not to project from the substrate. Also, the printed circuit board 1
The upper surface of 0 has a matt black color so that it does not reflect ambient light.

LED array 1 arranged on the printed circuit board 10
1, ..., 16 and the LED array 10A correspond to the diffused radiation lens elements 20A (see FIG. 6 (a)), 2
A plurality of 0Bs (see FIG. 6B) are arranged. That is,
Diffuse emission lens array 2 corresponding to LED array 11 formed around 270 degrees for indicating meter A such as a tachometer
1. A diffusion radiation lens array 22 corresponding to the LED array 12 formed around 270 degrees for an indicating meter B such as a speedometer, and an indicating meter C such as a hydraulic gauge provided on the upper left side thereof. LED row 13 formed around 90 degrees
Corresponding to the diffuse emission lens array 23 and the diffusion emission lens array 2 corresponding to the LED array 14 formed on the lower left side of the LED array 14 for the indicating meter D such as a fuel gauge formed around 90 degrees.
4, and a diffused radiation lens array 25 corresponding to the LED array 15 formed around 90 degrees for the indicating meter E such as a voltmeter provided on the upper right side thereof, and a water temperature provided on the lower right side thereof. It has a diffused radiation lens array 26 corresponding to the LED array 16 formed around 90 degrees for the indicating meter F such as a meter.

Each diffuse emission lens array 21, 22 is formed by a diffuse emission lens element 20A (see FIG. 6A), and each diffuse emission lens array 23, 24, 25, 26.
Are formed by the diffuse radiation lens element 20B (see FIG. 6B).

Diffuse emission lens elements 20A, 20B
Has an incident end 20a facing the LED, a first reflecting surface 20b that reflects the incident light, and a second reflecting surface 20c that reflects the reflected light from the first reflecting surface 20b again. It has the radiation | emission edge part 20d diffused and radiated by the 1st reflective surface 20b and the 2nd reflective surface 20c. The incident end 20a is a smooth surface, the first reflection surface 20b has a total reflection surface that reflects substantially incident light at 45 degrees, and the second reflection surface 20c has substantially incident light. It has a total reflection surface that reflects at 30 to 45 degrees, and the second reflection surface 20c has a rough surface. Radiant end 20
d is a smooth surface.

Two planes, that is, the side surfaces 20e and 20f, which are continuous from the entrance end 20a to the top and bottom of the radiation end 20d, that is, the side surfaces 20e and 20f are radially formed from the same center. Therefore,
In the cases of (a) and (b), the maximum distance between the two radial side surfaces 20e and the side surface 20f of the incident end portion 20a (the position on the right side of the incident end portion 20a in the plan view) is defined as the radiating end portion 2.
Maximum distance between two radial surfaces of 0d (radial end 20 in plan view)
It can be seen that there is a radial center point at the position on the left side of the plan view.

That is, in the present embodiment, the diffused radiation lens elements 20A and 20B forming the diffused radiation lens rows 21, ..., 26 are continuous from the entrance end 20a to the top and bottom of the radiation end 20d. The side surfaces 20e and 20f are radially formed with the same center, and the first reflecting surface 20b is formed on the upper portion facing the incident end portion 20a, and the radiating end portion 20d is formed.
A second reflecting surface 20c is formed on the lower portion facing the
The maximum distance between the two radial side surfaces 20e, 20f of the incident end portion 20a is defined by the radial two side surfaces 20e, 20f of the radial end portion 20d.
It is larger than the maximum interval of.

Diffuse emission lens elements 20A, 20B
Is coated with metal sputtering or white paint except the surfaces of the incident end 20a and the radiating end 20d to increase the reflectance of light and prevent leakage of light. The area of the entrance end 20a and the exit end 20d is wider at the exit end 20d than at the entrance end 20a. Further, the entrance end 20a is arranged so as to be located on the outer peripheral side when drawing a predetermined arc. Therefore, the end of the radiating end 20d opposite to the entrance end 20a is the entrance end 20a.
It is formed narrower than the a-side end. At this time, since the incident end portion 20a is formed so as to be located on the outer peripheral side when drawing a predetermined arc, the intervals between the LEDs of the LED rows 11, ..., 16 arranged on the printed circuit board 10 are set. It can be made wider, and it becomes easier to dispose.

In the present embodiment, in particular, the first reflecting surface 20b and the second reflecting surface 20c are subjected to the embossing process before the metal sputtering or the white paint is applied to the first reflecting surface 20b and the second reflecting surface 20c. Diffuse reflection is caused so that light is diffused by the surface 20b and the second reflecting surface 20c. First reflective surface 2
0b and the second reflection surface 20c are embossed by the incidence end portion 20.
It efficiently diffuses the light incident from a.
Diffuse reflection can be expected when applying white paint,
When metal sputtering is performed, it is preferable that roughening is performed by graining or sandblasting, and then a sputtering film is formed.

Further, from the entrance end 20a to the radiation end 20d.
Since the purpose is to guide light to the radiating end 20d on the side surface 20e and the side surface 20f that are continuous above and below, it is preferable to perform high-efficiency reflection by metal sputtering. You may join an aluminum vapor deposition film etc.

The radiating end 20d of this embodiment is
Although it is formed in a plane parallel to the incident end 20a, when the present invention is implemented, the radiating end 20d may be an upward slope or a downward slope in the front view of FIG.

FIG. 10 is a plan view and a front view (a) and a plan view and a front sectional view (b) showing examples of other two types of diffused emission lens elements in the light emitting diode display device according to the embodiment of the present invention. Is. Note that, in the figure, the same reference numerals and symbols as those of the embodiment of FIG. 6 indicate the same or corresponding components, and therefore, redundant description will be omitted and only the characteristic points will be described.

In the embodiment shown in FIG. 6, the diffused radiation lens element 20A is intended to receive the LED light from the LED rows 11, ..., 16 arranged on the printed circuit board 10. L at a position away from the portion 20a
It has been assumed that the ED is installed. However, in practicing the present invention, the diffuse emission lens element 20
If the property of A is respected, it can be implemented as follows.

The embodiment shown in FIG. 10 (a) is premised on that the LED arrays 11, ..., 16 arranged on the printed circuit board 10 are mounted so as to project.

At the entrance end 20a of the diffuse radiation lens element 20A in the embodiment shown in FIG.
A fitting hole 20g having a size into which each LED constituting the LED rows 11, ..., 16 can be inserted is formed. Of course,
The fitting hole 20g and the LED housed therein may be integrally joined with epoxy resin or the like. Therefore, the LED rows 11, ..., 16 protruding from the printed board 10 are housed in the incident end portion 20a of each diffused radiation lens element 20A to perform positioning and incidence of LED light. As a result, the LED light is incident on the peripheral surface thereof, and the incidence efficiency is good, so that the amount of light emitted from the emission end 20d can be increased. Of course, in the case where they are integrally joined with an epoxy resin or the like, reflection due to a difference in refractive index can be reduced and the incidence efficiency can be increased.

Further, in the above-mentioned embodiment, the case where the LED arrays 11, ..., 16 are mounted on the printed circuit board 10 has been described, but in the case of implementing the present invention, in the process of manufacturing the LEDs, A diffuse emission lens element 20A can also be used as a package. That is, FIG. 10 (b)
Diffuse emission lens element 2 in the embodiment shown in FIG.
At the entrance end 20a of 0A, the LED rows 11, ..., 1
One LED 20k constituting 6 is molded. At this time, the diffuse radiation lens element 20A is LE
It functions as a D20k package. In the electrical connection, the lead 20h of the LED 20k connects to the substrate. In this embodiment, the lead 20h is arranged perpendicularly to the surface of the incident end 20a, but in the case of practicing the present invention, the lead 20h is arranged inside or outside in parallel to the surface of the incident end 20a. You can withdraw. Therefore,
LED row 11 protruding from the printed circuit board 10 ...
The radiation end 2 is formed by molding in the entrance end 20a of each diffuse radiation lens element 20A constituting
The amount of light emitted from 0d can be increased, the incident efficiency is good, and the cost can be reduced because of the combined use of parts and workability. Particularly, in the present embodiment, the radiating end 20d
Is preferably used as the reflecting surface.

Further, in FIG. 6 and FIG. 10, although the characteristic diffused radiation lens array 21, ..., 26 is arranged in a circular arc, it has been described in the embodiment. It is also useful when placed in.

A condenser lens 21a is arranged facing the function display LED 11a for displaying the function of the indicating meter A such as a tachometer, and a radiation lens 21b is arranged facing the function display LED 11b. Function display LED 12a for displaying the function of the indicating meter B such as a speedometer
A condenser lens 22a is disposed so as to face the. Also,
Function display L that displays the function of the indicating meter C such as the oil pressure gauge
A condenser lens 23a facing the ED 13a has a function display LED 14a for displaying the function of the indicating meter D such as a fuel gauge.
The condenser lens 24a faces the function display LED 15a that displays the function of the indicator meter E such as a voltmeter, and the condenser lens 25a displays the function of the indicator meter F such as a water temperature meter that faces the function indicator LED 15a. Condensing lenses 26a are respectively arranged facing the display LEDs 16a.

In addition, LEDs 17R and 17L for direction indicators
Condensing lenses 27R and 27L are opposed to the
Condensing lenses 28 and 29 are arranged facing the EDs 18 and 19, respectively.

This type of condenser lens 21a, 22a, 23
a, 24a, 25a, 26a, 27R, 27L, 28,
Reference numeral 29 is a lens made of a photoconductor having a concave tip. In particular, the condenser lenses 28 and 29 facing the abnormality display LEDs 18 and 19 are integrally formed with a lens made of a photoconductor having a concave tip corresponding to each abnormality item.

A sheet 30 is arranged on the upper surface side of the diffused radiation lens arrays 21 ,. Diffuse emission lens array 21, ..., 26 Limits the emission of predetermined diffused light from the side, and partially diffuses emission lens array 21, ...
· Transmits diffused light from the 26 side. The sheet 30 is made of a transparent material, which is shown in FIG.

FIG. 7 is a front view of a sheet used in the light emitting diode display device according to one embodiment of the present invention.

In FIG. 7, the sheet 30 has a thickness of 0.5 mm.
A thick PC sheet with a textured surface, which is a transparent body, is disposed on the upper surface side of the diffusion radiation lens arrays 21, ..., 26, and has a predetermined diffusion from the diffusion radiation lens arrays 21 ,. It has a printing unit 30A that functions as a mask that limits the emission of light. The printing portion 30A has no translucency due to printing ink, and is printed with characters or illustrations as a light emitting diode display device for a specific purpose when viewed from above.
This opaque printing masks the unnecessary interior so that it is not visible. The display unit 31c and the display unit 3
Reference numeral 2b is a character or symbol relating to the indicating meter A such as a tachometer and the indicating meter C such as a hydraulic pressure meter.

In addition, the diffuse radiation lens array 21, ...
..... As the portion that transmits diffused light from the 26 side,
A transparent part 31 located on the upper surface of the diffused emission lens array 21 corresponding to the LED array 11 of the indicating meter A such as a tachometer, and function display transparent parts 31a and 31b for displaying the function thereof.
The transparent portion 3 located on the upper surface of the diffused radiation lens array 22 corresponding to the LED array 12 of the indicating meter B such as a speedometer.
2 and a function display transparent part 32a for displaying the function thereof, a transparent part 33 located on the upper surface of the diffusion radiation lens array 23 corresponding to the LED array 13 of the indicating meter C such as a hydraulic meter, and a function display transparent for displaying the function thereof. Part 33a, a transparent part 34 located on the upper surface of the diffused radiation lens array 24 corresponding to the LED array 14 of the indicator D such as a fuel gauge, a function display transparent part 34a for displaying its function, and a voltmeter for indicating. The transparent portion 35 located on the upper surface of the diffused radiation lens row 25 corresponding to the LED row 15 of the meter E, the function display transparent portion 35a for displaying the function thereof, and the L of the instruction meter F such as a water thermometer.
It has a transparent portion 36 located on the upper surface of the diffuse emission lens array 26 corresponding to the ED array 16 and a function display transparent portion 36a for displaying its function.

Further, the direction indication display transparent portions 37R and 37R.
L and the abnormal display transparent portions 38 and 39 also have a light-transmitting property.

Particularly, in the sheet 30 of the present embodiment, the transparent portion 3 located on the upper surface of the diffused radiation lens array 21 corresponding to the LED array 11 of the indicating meter A such as a tachometer.
1. LED row 12 of indicating meter B such as speedometer
The transparent portions 32 located on the upper surface of the diffused radiation lens array 22 corresponding to 1 are each formed as a through hole. Therefore, the size of the upper surface of the diffuse radiation lens array 21 and the area of the upper surface of the diffuse radiation lens array 22 serve as a pointer display. Of course, a feeling similar to that of the meter display by the pointer can be obtained by the upper surface of each diffused radiation lens array 21 and the upper surface of the diffused radiation lens array 22. In addition, the transparent portion 31 of the sheet 30 ...
, 36 and the direction indicating transparent portions 37R, 37L and the abnormal indicating transparent portions 38, 39 have no translucency except for the positions, so that the LED rows 11, ..., 16 and the LED row 1
0A and direction indicator LEDs 17R and 17L, abnormality display LEDs 18 and 19, diffusion radiation lens array 21, ...
26 and condenser lenses 21a, 22a, 23a, 24a,
It is possible to block the light leaking from 25a, 26a, 27R, 27L, 28, 29, etc., and enhance the brightness of the display. Further, it is possible to eliminate the bleeding obtained by the invasion of the light of the external enemy requirement and the expansion of the light blocking area.

FIG. 8 is a front view showing an example of another sheet used in the light emitting diode display device of one embodiment of the present invention.

In FIG. 8, the sheet 80 is 0.5 mm.
A thick PC sheet with a textured surface, which is a transparent body, is disposed on the upper surface side of the diffusion radiation lens arrays 21, ..., 26, and has a predetermined diffusion from the diffusion radiation lens arrays 21 ,. It has a printing unit 80A that functions as a mask that limits the emission of light. The printing portion 80A has no translucency due to printing ink, and is printed with characters or illustrations as a light emitting diode display device for a specific purpose when viewed from above.
By this printing, the mask is masked so that unnecessary interiors are not shown. The display section 81c and the display section 82b are provided with characters or symbols relating to the indicating meter A such as a tachometer and the indicating meter C such as a hydraulic meter.

In addition, the diffuse radiation lens array 21, ...
..... As the portion that transmits diffused light from the 26 side,
A transparent portion 81 located on the upper surface of the diffused radiation lens array 21 corresponding to the LED array 11 of the indicating meter A such as a tachometer and function display transparent portions 81a and 81b for displaying the function thereof.
The transparent portion 8 located on the upper surface of the diffused emission lens array 22 corresponding to the LED array 12 of the indicating meter B such as a speedometer.
2 and a function display transparent part 82a for displaying the function thereof, a transparent part 83 located on the upper surface of the diffusion radiation lens array 23 corresponding to the LED array 13 of the indicating meter C such as a hydraulic meter, and a function display transparent for displaying the function thereof. Part 83a, a transparent part 84 located on the upper surface of the diffused radiation lens array 24 corresponding to the LED array 14 of the indicating meter D such as a fuel gauge, a function display transparent part 84a for displaying its function, and a voltmeter for indicating The transparent portion 85 located on the upper surface of the diffused radiation lens row 25 corresponding to the LED row 15 of the meter E, the function display transparent portion 85a for displaying the function thereof, and the L of the instruction meter F such as a water thermometer.
It has a transparent portion 86 located on the upper surface of the diffuse radiation lens row 26 corresponding to the ED row 16 and a function display transparent portion 86a for displaying its function.

Further, the direction indicating display transparent portions 87R, 87
L and the abnormal display transparent portions 88 and 89 also have a light-transmitting property.

Particularly, in the sheet 80 of the present embodiment, the transparent portion 8 located on the upper surface of the diffused radiation lens array 21 corresponding to the LED array 11 of the indicating meter A such as a tachometer.
1. LED row 12 of indicating meter B such as speedometer
The transparent portion 82 located on the upper surface of the diffused radiation lens array 22 corresponding to is formed as a plurality of slits. Therefore, the plurality of slits are displayed as pointers for each slit, and the same feeling as the meter display by the pointers can be obtained.
Also, the transparent portions 81, ..., 86 of the sheet 80, the direction instruction display transparent portions 87R, 87L, the abnormality display transparent portion 88,
Since there is no translucency except for the position 89, the LED
, 16 and LED row 10A, direction indicator LEDs 17R, 17L, abnormality display LEDs 18, 1
9, diffuse radiation lens array 21, ..., 26 and condenser lenses 21a, 22a, 23a, 24a, 25a, 26a,
It is possible to block the light leaked from 27R, 27L, 28, 29, etc., and enhance the brightness of the display. Then, it is possible to eliminate the bleeding obtained by the invasion of the light of the external enemy requirement and the expansion of the light blocking area. In particular, since the transparent portions 81 and the transparent portions 82 are slits and are narrower than the widths of the diffusion radiation lens array 21 and the diffusion radiation lens array 22, bleeding and the like can be removed more effectively.

On the upper surface of the sheet 30 or the sheet 80,
A lens cover 40 is provided. The lens cover 40 is made of transparent acrylic. The lens cover 40 has a protrusion that engages with a hole formed around the housing 50. This lens cover 40
Has a carved portion such as letters and marks on the back surface, and the carved portion is roughened, and the coating material is applied thereto.

FIG. 9 is a front view of the lens cover 40 used in the light emitting diode display device according to the embodiment of the present invention.

More specifically, "0, 1, 2, ... Attached to the transparent portion 31 located on the upper surface of the diffusion radiation lens array 21 corresponding to the LED array 11 of the indicating meter A such as a tachometer.
・, 6 ”and a large scale 41 corresponding to that number
a, an intermediate graduation 41b between the large graduations 41a, and a small graduation 41c between the intermediate graduations 41b are respectively engraved, and a different color or the same color or the lightness is applied to the coating material. . “0, 20, 4” attached to the transparent portion 32 located on the upper surface of the diffused radiation lens array 22 corresponding to the LED array 12 of the indicating meter B such as a speedometer.
0, ..., 160 ”, the large scale 42a corresponding to the numerical value, and the intermediate scale 4 between the large scales 42a.
2b and a small scale 42c between the intermediate scales 42b are engraved, respectively, and a different color or the same color, or the lightness is changed, and the coating material is applied thereto.

The LED of the indicating meter C such as a hydraulic pressure gauge
Scales 43a, 43 provided in three divisions on the transparent portion 33 located on the upper surface of the diffuse radiation lens array 23 corresponding to the array 13
b, 43c and letters "H, L" are engraved respectively, and are attached to the transparent portion 34 located on the upper surface of the diffusion radiation lens array 24 corresponding to the LED array 14 of the indicating meter D such as a fuel gauge. The large scale 44a, the intermediate scale 44b between the large scales 44a, and the letters "F, E" are engraved, respectively, and different colors or the same color, or the lightness is changed and the paint is applied. There is.

Similarly, the LE of the indicating meter E such as a voltmeter is
Large scales 45a, 45c attached to the transparent portion 35 located on the upper surface of the diffuse radiation lens array 25 corresponding to the D array 15.
An intermediate scale 45b and letters "0, ..., 18" are engraved respectively, and the LED of the indicating meter F such as a water thermometer
The scales 46a, 46b and the letters "H, C" attached to the transparent portion 36 located on the upper surface of the diffuse radiation lens array 26 corresponding to the array 16 are respectively engraved, and different colors or the same color, or The paint is applied by changing the brightness.

This kind of lens cover 40 is provided with a plurality of LEs.
By the light introduced from the LED array 10A for illumination including D, the paint applied to the engraved portion such as letters and marks on the back surface is colored, and the other is a transparent body and does not develop color, and the letters and marks Only the paint applied to the engraved part of the is colored and can be recognized.

The light emitting diode display device according to the present embodiment is provided with a plurality of LEDs arranged on the printed circuit board 10 for measurement, such as LED arrays 11, ..., 16 and an incident end opposed to the measurement LEDs. Diffuser lens element 20 having an end and a radiating end that diffuses and emits the incident light.
Diffuse emission lens array 21, ..., 2 composed of A and 20B
6, and the diffuse radiation lens rows 21, ..., 26, which are arranged on the upper surface side of the diffuse radiation lens rows 21 ,.
Sheets 30 and 80 that limit the emission of predetermined diffused light from the side and partially transmit the diffused light from the side of the diffused radiation lens rows 21, ..., 26, and the sheet 30,
The sheet is located on the upper surface of 80 and guides the incident light of the LED array 10A for illumination composed of the LEDs to the upper surface of the diffuse emission lens array 21, ... Passing through the diffuse radiation lens array 2
The lens cover 40 transmits the light of 1, ..., 26.

Therefore, in the embodiment of this type, the diffused emission lens has an incident end portion facing the measurement LED rows 11, ..., 16 and a radiation end portion for diffusing and emitting the incident light. Rows 21, ..., 26 and seat 3
Any design can be created with 0,80, and the degree of freedom in design can be increased. Further, since the predetermined measurement amount is not displayed by the known pointer, the measurement amount can be sufficiently displayed even if the distance from the driver is increased, and the distance from the driver's eye position can be increased. it can. It is possible to reduce the change in the distance of the line of sight, and it is normally visible even in hyperopia.

Further, the lens cover 40 has a plurality of LEs.
By the light introduced from the LED array 10A for illumination including D, only the paint applied to the engraved portion such as letters and marks on the back surface is colored and recognizable, so that the display element can be represented twice. .

Then, the diffusion emission lens array 21, ..., Consisting of the diffusion emission lens elements 20A, 20B having an incident end portion facing the measuring LED and a radiation end portion for diffusing and emitting the incident light. Since the diffused radiation lens arrays 21, ..., 26 are arranged in an arc shape to allow light to enter from the outer circumference of the circle, the arrangement of the measurement LED arrays 11 ,. It is easy to secure the installation position. Naturally, the diffused radiation lens array 21, ...
.., 26 arcuate arrays are not limited to approximately 90 degrees and approximately 270 degrees, but approximately 30 degrees or less,
On the contrary, it is also possible to implement it at about 270 degrees or more.

In the light emitting diode display device of the present embodiment, the LED columns 11, ..., 16 for measurement can be LEDs emitting red, green, and blue.
That is, it is possible to express any color and improve the design. Further, when the value exceeds a predetermined set value, the color can be changed.

In particular, red light entering the lens cover 40,
As the LEDs emitting green and blue, LEDs housed in one element or red LEDs, green LEDs, and blue LEDs may be arranged alternately. Or red LED, green LED,
It is also possible to use only one of the blue LEDs. Alternatively, an ultraviolet LED may be used, and the paint applied to the lens cover 40 may be a paint that emits ultraviolet light.

As described above, the light emitting diode display device according to the present embodiment has the LED array 1 arranged on the printed circuit board 10.
1, ..., 16 and a diffusion radiation lens array 21, in which diffusion radiation lens elements 20A and 20B having an incidence end 20a and a radiation end 20d that diffuses and emits the incident light are arranged in a row. .., in the light emitting diode display device including 26, the diffused emission lens array 21 ,.
., Diffuse emission lens element 20A forming 26,
20B has two side surfaces 20e and 20f that are continuous from the entrance end 20a to the top and bottom of the radiating end 20d and are formed radially with the same center, and has a first reflecting surface 20b at the upper part facing the entrance end 20a, and The second reflecting surface 20c is formed in the lower portion facing the radiation end portion 20d, and the maximum distance between the two radial side surfaces 20e, 20f of the incidence end portion 20a is set to the radiation end portion 20d.
It is made larger than the maximum interval between the two radial side surfaces 20e, 20f of d, and this can be the embodiment of claim 1.

Therefore, L is placed on the plane of the printed circuit board 10.
, 16 are arranged, the entrance ends 20a of the diffuse radiation lens elements 20A, 20B are opposed to the ED rows 11, and they are guided to the radiation end 20d located on the upper surface. As described above, the LED array 11, ...
Since there is no need to dispose .., 16, manufacturing can be simplified and manufacturing cost can be reduced. Further, the diffuse radiation lens elements 20A and 20B have two side surfaces 20e and 20f which are continuous from the entrance end 20a to the top and bottom of the radiation end 20d and are formed radially with the same center, and the two radial side surfaces 20e of the entrance end 20a. , 20f with a maximum spacing of 20d
Is larger than the maximum distance between the two radial side surfaces 20e, 20f of the LED array 11, ...
16 can be arranged, so that the diffuse emission lens element 20
The arrangement density of A and 20B can be increased. Since the LED rows 11, ..., 16 are not arranged on the outer periphery of the diffused emission lens elements 20A, 20B, the size can be reduced.

Further, as described above, in the above-described embodiment, the diffusion radiation lens array 21, which is arranged in a characteristic arc shape,
, 26 has been described as a premise, but the present invention can also be applied to the case of arranging linearly and the case of arranging one.

That is, the light emitting diode display device according to the present embodiment has the LED rows 11 ,.
.. Diffuse radiating lens array 21 in which diffuse radiating lens elements 20A and 20B having an incident end 20a facing 16 and a radiating end 20d for diffusing and radiating the incident light are arranged in a row 21 ,. In the light emitting diode display device including 26, the diffused emission lens array 21, ..., 2
Diffuse emission lens elements 20A, 20B forming 6
Is the first reflecting surface 20 on the upper side facing the incident end 20a.
b, a second reflecting surface 20c is formed in the lower portion facing the radiating end 20d, and the maximum distance between the two radial side surfaces 20e, 20f of the incident end 20a is set to the radial 2 of the radiating end 20d. It is made larger than the maximum distance between the side surfaces 20e, 20f, and this can be the embodiment of claim 2.

Therefore, L is formed on the plane of the printed circuit board 10.
, 16 are arranged, the entrance ends 20a of the diffuse radiation lens elements 20A, 20B are opposed to the ED rows 11, and they are guided to the radiation end 20d located on the upper surface. A reflecting surface exists on the surface facing the end 20a and the radiating end 20d, efficient reflection is performed, manufacturing is simplified, and manufacturing cost can be reduced. It can also be used when arranging in a straight line and when arranging one.

The diffused emission lens elements 20A and 20B in the light emitting diode display device of the above embodiment.
In the above, both the reflecting surfaces are roughened by graining or sandblasting, and this can be the embodiment of claim 3. Therefore, since diffuse reflection is caused so that light is diffused by the reflecting surfaces 20b and 20c,
The light incident from the incident end 20a can be efficiently diffused.

The diffused emission lens elements 20A and 20B in the light emitting diode display device of the above embodiment.
Is coated with a metal except for the incident end 20a and the radiating end 20d, which can be the embodiment of claim 4. Therefore, the reflection efficiency is good, the reflection film can be firmly formed, and the thickness thereof can be reduced, and the LED array 11, ...
There is no 16 madness.

The diffused emission lens elements 20A and 20B in the light emitting diode display device of the above embodiment.
Can be a white coating applied except for the incident end 20a and the radiating end 20d, and this can be the embodiment of claim 5. You get the diffuse reflection you need,
By analogy, even if the incident end 20a and the radiating end 20d are not roughened, it is possible to increase the reflectance of light and prevent light from leaking with an efficiency similar to that.

The diffused emission lens elements 20A and 20B in the light emitting diode display device of the above embodiment.
The incident end portion 20a of is provided with a fitting hole 20g into which the LED is inserted, and this can be the embodiment of claim 6.

Therefore, when mounted on the printed circuit board 10,
Each LED projecting from the printed circuit board 10
Is housed within the entrance end 20a of the diffuse emission lens element 20A for positioning and LED
Light is incident on its peripheral surface, and the incidence efficiency is improved.

The incident end portion 20 of the diffused emission lens element in the light emitting diode display device of the above embodiment.
The LED is integrally molded with a, and this can be the embodiment of claim 7.

Therefore, the diffuse radiation lens element 2
By integrally molding the LED in the incident end portion 20a of 0A, the amount of light emitted from the emission end portion 20d can be increased, the incident efficiency is good, and the cost is low due to the combined use of parts and workability. You can

The radiating end portion 20d of the above-described embodiment is used.
Is formed on a surface parallel to the incident end 20a, but in the case of practicing the present invention, the radiating end 20d may be an inclined surface that rises to the right or descends to the right in the front view of FIG.

Further, in the above embodiment, the vehicle instrument panel for instructing the measurement information of the vehicle has been described as an example, but in the case of implementing the present invention, the speedometer,
It can be used only for a specific measuring instrument such as a tachometer, and does not specify the analog or digital display format.

[0075]

As described above, the light emitting diode display device according to claim 1 has a diffusion end portion having an incident end portion facing the LED array arranged on the printed circuit board and a radiation end portion for diffusing and emitting the incident light. The diffused radiation lens element, which includes a radiation lens array and forms the diffused radiation lens array, has two surfaces, which are continuous from the entrance end to the top and bottom of the radiation end, formed radially with the same center, A reflecting surface is formed on the upper part facing each other, and another reflecting surface is formed on the lower part facing the radiating end, and the maximum distance between the two radial surfaces of the incident end is defined by the radial two of the radiating end. It is larger than the maximum distance between faces.

Therefore, the LED is arranged on the plane of the printed circuit board.
A row is arranged, the entrance end of the diffuse radiation lens element is opposed to the top, and it is guided to the radiation end located on the upper surface. Since it is not necessary to dispose the LED array on the upper side, the component manufacturing process is simplified and the manufacturing cost can be reduced. In addition, the diffuse radiation lens element has two side surfaces continuous from the incident end portion to the upper and lower sides of the radiation end portion, and is formed radially with the same center, and the maximum distance between the two radial side surfaces of the incident end portion is the radial direction of the radiation end portion. It is larger than the maximum distance between the two sides, and because the LED row can be arranged on the outermost peripheral side,
The disposition density of the diffuse radiation lens elements can be increased. And L is attached to the outer circumference of the diffuse radiation lens element.
Since the ED row is not arranged, the size can be reduced.

According to a second aspect of the present invention, there is provided a light emitting diode display device comprising a diffused emission lens array having an incident end portion facing an LED row arranged on a printed circuit board and a radiation end portion for diffusing and emitting the incident light. The diffused radiation lens element forming the diffused radiation lens array has a reflecting surface formed on an upper portion facing the incident end portion and another reflecting surface formed on a lower portion facing the radiation end portion.

Therefore, the LED is arranged on the plane of the printed circuit board.
A row is arranged, the entrance end of the diffuse radiation lens element is opposed to the top, and it is guided to the radiation end located on the upper surface. Since it is not necessary to dispose the LED array on the upper side, the component manufacturing process is simplified and the manufacturing cost can be reduced. Further, it can be used in the case of arranging in a straight line or in the case of arranging one, and since the LED rows can be arranged in one direction, workability such as alignment is improved. Then, the incident end of the diffuse radiation lens element is opposed to the plane of the printed circuit board,
It guides it to the radiating end located on the upper surface.There is a reflecting surface on the surface facing the incident end and the radiating end, efficient reflection is performed, manufacturing is simplified, and manufacturing cost is reduced. It can be reduced.

In the light emitting diode display device according to a third aspect of the present invention, the diffused emission lens element has the reflecting surfaces having rough surfaces, and in addition to the effect of the first or second aspect,
Since diffuse reflection is caused as if the light is diffused on the reflecting surface, the light incident from the incident end can be diffused efficiently.

In the light emitting diode display device according to a fourth aspect of the present invention, the diffused emission lens element is coated with a metal except the incident end portion and the emission end portion. In addition to one effect, the reflection efficiency is good, the reflection film can be firmly formed, and the thickness thereof can be made thin. Even when assembled in an LED array due to aging, the deviation does not occur.

The diffused emission lens element of the light emitting diode display device according to claim 5 is coated with white paint except at the incident end and the emission end. Therefore, one of claims 1 to 4 In addition to the effect described in (1), the diffuse reflection necessary for the radiation end can be obtained. By analogy, even if the incident end and the radiation end are not roughened, the reflected light of the light can be reflected at an efficiency similar to that. It is possible to increase the rate and prevent light from leaking.

In the light emitting diode display device according to claim 6, since the entrance end of the diffused emission lens element is provided with a fitting hole into which an LED is inserted, any one of claims 1 to 5 is provided. In addition to one effect, by mounting the LED mounted on the printed circuit board and projecting from the printed circuit board in the entrance end of the diffused radiation lens element, positioning can be performed and the LED light can be positioned on the peripheral surface. Since it is incident, the incidence efficiency is improved.

Since the LED is integrally molded at the incident end of the diffused emission lens element of the light emitting diode display device of claim 7, in addition to the effect of any one of claims 1 to 5. As a result, the amount of light radiated from the radiating end can be increased, the incidence efficiency can be improved, and the cost can be reduced due to the combined use of parts and workability.

[Brief description of drawings]

FIG. 1 is a front view of a light emitting diode display device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line XX of the light emitting diode display device according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view taken along the section line Y-Y of the light emitting diode display device according to the embodiment of the present invention.

FIG. 4 is a front view showing an arrangement of light emitting diodes on a printed circuit board in a light emitting diode display device according to an embodiment of the present invention.

FIG. 5 is a front view showing an arrangement of diffused emission lenses in a light emitting diode display device according to an embodiment of the present invention.

6A and 6B are a plan view and a front view showing a structure of two types of diffused emission lens elements in a light emitting diode display device according to an embodiment of the present invention.

FIG. 7 is a front view of a sheet used in the light emitting diode display device according to the embodiment of the present invention.

FIG. 8 is a front view showing an example of another sheet used in the light emitting diode display device of one embodiment of the present invention.

FIG. 9 is a front view of a lens cover used in the light emitting diode display device according to the embodiment of the present invention.

FIG. 10 is a plan view, a front view (a), a plan view and a front cross-sectional view (b) showing examples of other two types of diffused emission lens elements in a light emitting diode display device according to an embodiment of the present invention. ).

[Explanation of symbols]

 10 Printed circuit board 10A LED row 11, ..., 16 LED row 20A, 20B Diffuse emission lens element 20a Incident end 20d Radiation end 20e, 20f Side surface 20b, 20c Reflective surface 21, ..., 26 Diffuse emission lens row 30,80 sheet 40 lens cover

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiko Suzuki, Kasuga-cho, Nishiichi, Aichi Prefecture 1 Ochiai, Nagahata, Toyoda Gosei Co., Ltd. (72) Inventor Osamu Yamanaka 1, Kasuga-cho, Nishiichi, Aichi Prefecture Ochiai, Nagahata In Toyoda Gosei Co., Ltd. (72) Inventor Tadanobu Iwasa No. 1 Nagahata, Ochiai, Kasuga-cho, Nishikasugai-gun, Aichi Toyota Gosei Co., Ltd.

Claims (7)

[Claims] 1. A light emitting diode display device comprising: a diffusion emission lens array having an incident end portion facing a light emitting diode row arranged on a printed circuit board and a radiation end portion for diffusing and emitting the incident light. The diffuse radiation lens elements forming the radiation lens array are continuous from the entrance end to above and below the exit end.
A surface is formed radially with the same center, a reflection surface is formed in an upper portion facing the incident end portion, and another reflection surface is formed in a lower portion opposite the emission end portion, and the emission end portion has a radial shape. 2. The light emitting diode display device is characterized in that the maximum distance between the two surfaces is larger than the maximum distance between the two radial surfaces of the radiation end portion. 2. A light emitting diode display device comprising: a diffusion emission lens array having an incident end portion facing a light emitting diode row arranged on a printed circuit board and a radiation end portion for diffusing and emitting the incident light. The diffused emission lens element forming the emission lens array has a reflecting surface formed on an upper portion facing the incident end portion and another reflecting surface formed on a lower portion facing the emission end portion. Display device. 3. The light emitting diode display device according to claim 1, wherein the diffused emission lens element has both reflecting surfaces as rough surfaces. 4. The light emission according to claim 1, wherein the diffuse emission lens element is coated with a metal except for the incident end portion and the emission end portion. Diode display device. 5. The light emitting diode according to claim 1, wherein the diffused radiation lens element is coated with white paint except the incident end and the radiation end. Display device. 6. The light emitting diode according to claim 1, wherein the diffused radiation lens element has an entrance end provided with a fitting hole into which the light emitting diode is inserted. Display device. 7. The light emitting diode display device according to claim 1, wherein a light emitting diode is integrally molded at an incident end portion of the diffused emission lens element.