CN204340854U - Character board lighting structure - Google Patents
Character board lighting structure Download PDFInfo
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- CN204340854U CN204340854U CN201420800196.8U CN201420800196U CN204340854U CN 204340854 U CN204340854 U CN 204340854U CN 201420800196 U CN201420800196 U CN 201420800196U CN 204340854 U CN204340854 U CN 204340854U
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Abstract
The utility model provides a kind of character board lighting structure.In this character board lighting structure, the ring portion around character board is thrown light on equably and the multiple light sources thrown light on to light guide plate are located in less space.Ring portion illumination guiding lamp (banded light conductor) comprises and to overlap with the ring portion be formed at around character board of speed gauge and to have the light conductor main body of identical width (W), make the end face of this ring portion illumination guiding lamp with towards character board rear side away from character board mode bend, and, form the curve along with width (W) expands gradually smoothly near end face, the surface of curve is formed level and smooth convex surface in the mode protruded outside normal direction, the light that the light source be made up of multiple LED relatively arranged from the end face with ring portion illumination guiding lamp is launched is injected into the inside of ring portion illumination guiding lamp and throws light on to ring portion.
Description
Technical field
The utility model relates to the character board lighting structure of the illumination of the instrument such as a kind of speed gauge for vehicle, revolution counter (tachometer).
Background technology
Usually, the scale, numerical value etc. of the read out instrument used in the instrument such as speed gauge, revolution counter of vehicle are arc-shaped configuration along the rotary motion direction of the pointer on character board.And, the light guide plate be made up of translucent material is configured in the rear side of character board, make the light launched from light source be incident upon light guide plate, utilize light guide plate by the photoconduction the injected back side to character board, thus from rear side, transillumination is carried out to the scale, numerical value etc. with light transmission.Now, throw light on the scale, numerical value etc. of uniform brightness to character board on a large scale, be known to the character board lighting structure that a kind of banded light conductor using width larger carries out transillumination.(such as patent documentation 1)
Patent documentation 1: Japanese Unexamined Patent Publication 2011-47790 publication
Utility model content
The problem that utility model will solve
Adopt the utility model described in patent documentation 1, formed be greater than the width of the incident section of banded light conductor by the width of the light guiding section making banded light conductor, thus the light broad ways that will be injected into banded light conductor expand and throw light on a large scale to the scale, numerical value etc. of the configuration in arc-shaped.
Not only the lighting structure of the scale, numerical value etc. that use the character board of so banded light conductor is applied to the illumination of scale, numerical value etc., also this lighting structure is applied to the illumination of the ring portion that the outer edge in the region showing scale, numerical value etc. is formed, and transillumination is carried out to ring portion, the expression effect of character board can be improved.
Now, a kind of following lighting structure can be imagined: application character board lighting structure in the past, by arranging multiple light source of the light of injection different wave length (color) at the end face of banded light conductor and switching the light source lighted, thus the illuminating color of transillumination can be changed and improve expression effect.
For this reason, need the area of the end face expanding banded light conductor, and end face after expansion arranges multiple light source.
But, owing to being provided with various warning light in the rear side of character board, for driving the control circuit etc. of the stepper motor of pointer and the rotation for control step motor, therefore spatially do not have more than needed, there is the width being difficult to the end expanding banded light conductor thus and end face at width expansion configures the such problem of multiple light source.
The utility model is considered above-mentioned situation and makes, its object is to, provide a kind of the light launched from multiple light source can be made to be injected into the banded light conductor at the back side being arranged on character board end face and the character board lighting structure end face of this banded light conductor can be located in less space.
For the scheme of dealing with problems
Character board lighting structure of the present utility model is used for the inboard light being injected into banded light conductor from multiple light source injection being guided to banded light conductor, and makes directed light externally penetrate and carry out transillumination to character board.
That is, first aspect of the present utility model provides a kind of character board lighting structure, and this character board lighting structure comprises: character board, and it is made up of translucent material, and has the mark part of the arrangement in arc-shaped, banded light conductor, it is made up of translucent material, and is configured at the rear side of described character board, and multiple light source, the plurality of light source is injected to the inside of described banded light conductor for making the end face of light on the extended direction of described banded light conductor, this character board lighting structure is by guiding the described light of the inside being injected into described banded light conductor and making described light penetrate towards the back side of described character board, thus transillumination is carried out to described character board, the feature of this character board lighting structure is, described banded light conductor comprises: light conductor main body, this light conductor main body has identical thickness, for guiding the light being injected into its inside, and, described light is made to penetrate from the face that itself and described character board are facing and carry out transillumination from rear side to described character board, curve, it is formed mutually with described light conductor main body continuously, and has the thickness equal with the thickness of described light conductor main body, and this curve bends towards the direction at the back side away from described character board, and light in part, it forms the end face on the extended direction of described curve, inject to the inside of described banded light conductor for making the light launched from described multiple light source, described light conductor main body is for overlooking arc-shaped, the face facing with the back side of described character board of described light conductor main body is wide with aspect, described curve makes the width of described wide along with the face of widening expanded smoothly near described light in part, be formed as being formed level and smooth convex curve in the mode protruded towards described normal direction of widening face with the outer edge of described wide consecutive in described light in part, and, described multiple light source is configured in character board lighting structure along described outer edge, the position relative with described light in part.
Adopt the character board lighting structure so formed, the light penetrated from multiple light source is injected from the light in part of the end face forming banded light conductor, and curve internal communication and be directed to the rear side of character board equitant, the light conductor main body in aspect formed by wide, light from light conductor main body injection to character board rear side and when transillumination being carried out to character board from rear side, what form the light conductor main body of banded light conductor is formed as widening face with equitant wide of the rear side of character board in the mode that its width is expanding along with the light in part near banded light conductor smoothly with light conductor main body consecutive curve place, therefore, the light being injected into the inside of banded light conductor from light in part carries out total internal reflection while sentence at curve the mode assembled towards the central part on the Width of banded light conductor, while guided by the inboard towards light conductor main body.Thus, can become clear to whole character board and throw light on equably.In addition, due to multiple light sources of the light penetrating different wave length respectively can be arranged, therefore, it is possible to carry out by switching the expression effect that luminous light source comes to apply the illuminating color of character board change and raising illumination.
And, in the light in part of banded light conductor, protrude towards the normal direction in the face of widening being formed in curve with the outer edge of wide consecutive of light conductor main body and form level and smooth convex curve, therefore, compared with the situation being formed as linearity with outer edge, the size on the Width of the light in part of banded light conductor can be reduced, thus multiple light source can be set in less space.Thus, the degree of freedom that light source is arranged is improved.
Second aspect of the present utility model provides the lighting structure of the character board according to first aspect, it is characterized in that, described banded light conductor is used for throwing light on to the ring portion of the surrounding being formed at described mark part.
The third aspect of the present utility model provides the lighting structure of the character board according to first aspect or second aspect, it is characterized in that, described convex curve is circular shape.
Fourth aspect of the present utility model provides the character board lighting structure according to any one of first aspect to the third aspect, it is characterized in that, this character board lighting structure has wavelength multiple light sources different from each other, by in described multiple light source, light source that brightness is the highest is configured in the inner circumferential side of described light in part, by described multiple light source, light source that brightness is minimum is configured in the outer circumferential side of described light in part.
5th aspect of the present utility model provides the lighting structure of the character board according to fourth aspect, it is characterized in that, the highest light source of described brightness is white light source.
The effect of utility model
Adopt character board lighting structure of the present utility model, the end face of the banded light conductor at the back side of character board is arranged on due to the light penetrated from multiple light source can be made to be injected into, therefore, it is possible to improve the expression effect of illumination, further, can obtain effect such in less space is located in the end of banded light conductor.
Accompanying drawing explanation
Fig. 1 is the front view of the outward appearance of the speed gauge representing embodiment 1 of the present utility model.
Fig. 2 is the exploded perspective view of the main composition part of the speed gauge representing embodiment 1 of the present utility model.
Fig. 3 represents to carry out cutting with cutting line A-A to Fig. 1 and the cutaway view of the profile construction obtained.
Fig. 4 is the block diagram of the ring portion illumination guiding lamp (guide light) used in the speed gauge of embodiment 1 of the present utility model.
Fig. 5 (a) is the end elevation of the shape of the end face representing the ring portion illumination guiding lamp used in the speed gauge of embodiment 1 of the present utility model.Fig. 5 (b) is the end elevation of the shape of the end face of the edge of the end face representing ring portion illumination guiding lamp when being formed by straight lines.
Fig. 6 is for illustration of the side view of ring portion illumination guiding lamp and the lateral plan in the path of light injected from end face.
Fig. 7 A be for illustration of light be injected into path after the ring portion illumination guiding lamp used in the speed gauge of embodiment 1 of the present utility model, from the end elevation of ring portion illumination guiding lamp viewed from end face direction.
Fig. 7 B be when being formed by straight lines for illustration of the edge of the end face at ring portion illumination guiding lamp light be injected into path after ring portion illumination guiding lamp, from the end elevation of ring portion illumination guiding lamp viewed from end face direction.
Fig. 8 be the path of the light that the light source arranged for illustration of the inner circumferential side of the end face of the ring portion illumination guiding lamp used from the speed gauge of embodiment 2 of the present utility model respectively and circumferential lateral surface side is launched, the birds-eye view of ring portion illumination guiding lamp.
Description of reference numerals
10a, speed gauge; 20, character board; 25, mark part; 30, pointer; 40, ring portion; 50, mark part illumination guiding lamp; 60, ring portion illumination guiding lamp (banded light conductor); 62, bottom housing part; 64, guiding lamp accommodation section is used in mark part illumination; 66, guiding lamp accommodation section is used in ring portion illumination; 68, circuit substrate; 70,72, light source.
Detailed description of the invention
Hereinafter, with reference to the accompanying drawings of an embodiment of character board lighting structure of the present utility model.
Embodiment 1
Fig. 1 be application have of the present utility model, for showing the External view of the speed gauge 10a of car speed.This speed gauge 10a be located at the car indoor of not shown vehicle, driver can the position seen of naked eyes.
The surface of character board 20 forming speed gauge 10a is formed with the mark part 25 be made up of the numerical value of speed and scale, and pointer 30 carries out rotating and indicating the value corresponding with car speed.
Mark part 25 is had light transmission and is formed by printing, carries out transillumination by the illumination light of the back side illuminaton from character board 20 to mark part 25.
Ring portion 40 is formed in the periphery of mark part 25.This ring portion 40 is such as had light transmission and is formed on the surface of character board 20 by printing, utilizes and carries out transillumination from the illumination light of the back side illuminaton of character board 20 to this ring portion 40.
In addition, the light irradiated from Different Light is utilized to come respectively to carry out transillumination to mark part 25 and ring portion 40.
The present embodiment 1 the utility model is applied to the example to the lighting structure that ring portion 40 is wherein thrown light on.
In addition, pointer 30 is undertaken throwing light on by the lighting structure different from the utility model, and the description thereof will be omitted.
Integrally-built explanation
Next, use Fig. 2 and Fig. 3 that the integral structure of speed gauge 10a is described.Fig. 2 is the exploded perspective view of the main composition part representing speed gauge 10a.Fig. 3 represents to carry out cutting with cutting line A-A to Fig. 1 and the cutaway view of the profile construction obtained.
As shown in Figure 2, speed gauge 10a comprises: pointer 30; Character board 20; Ring portion illumination guiding lamp 60 (banded light conductor), it is for guiding the light thrown light on to the ring portion 40 of character board 20; Mark part illumination guiding lamp 50, it is for guiding the light thrown light on to the mark part 25 of character board 20; Bottom housing part 62, it is for holding ring portion illumination guiding lamp 60 and mark part illumination guiding lamp 50; And circuit substrate 68, it is provided with the element be configured for the electronic circuit that the action of speed gauge 10a controls.Wherein, the utility model is applied to the structure of ring portion illumination guiding lamp 60.
Ring portion illumination guiding lamp 60 (banded light conductor) is formed by having the transparent resin material shaping such as light transmission, polycarbonate, acrylic resin.
Ring portion illumination guiding lamp 60 (banded light conductor) comprises light conductor main body 60f, curve 60g, 60g and light in part 60h, 60h, this light conductor main body 60f thickness is identical, be formed as overlooking arc-shaped, for guiding the light being injected into its inside, and make light penetrate from the face facing with ring portion 40 of character board 20 and carry out transillumination to ring portion 40, this curve 60g, 60g is formed continuously with light conductor main body 60f phase and has the thickness identical with the thickness of light conductor main body 60f, this curve 60g, 60g is formed by making light conductor main body 60f bend towards the direction at the back side away from character board 20, this light in part 60h, 60h forms curve 60g, end face on the extended direction of 60g, inject to the inside of ring portion illumination guiding lamp 60 for making the light penetrated from multiple light source 72 (aftermentioned).
Ring portion illumination guiding lamp 60 (banded light conductor) is contained in ring portion illumination guiding lamp accommodation section 66, and this ring portion illumination guiding lamp accommodation section 66 is concavely formed on the surface of bottom housing part 62.
Mark part illumination guiding lamp 50 is formed by having the transparent resin material shaping such as light transmission, polycarbonate, acrylic resin.
Mark part illumination guiding lamp 50 comprises light conductor main body 50f, curve 50g, 50g and light in part 50h, 50h, this light conductor main body 50f thickness is identical, be formed as overlooking arc-shaped, for guiding the light being injected into its inside, and make light penetrate from the face facing with mark part 25 of character board 20 and carry out transillumination to mark part 25, this curve 50g, 50g is formed continuously with light conductor main body 50f phase and has the thickness identical with the thickness of light conductor main body 50f, this curve 50g, 50g is formed by making light conductor main body 50f bend towards the direction at the back side away from character board 20, this light in part 50h, 50h forms curve 50g, end face on the extended direction of 50g, inject to the inside of mark part illumination guiding lamp 50 for making the light penetrated from light source 70 (aftermentioned).
Mark part illumination guiding lamp 50 is contained in mark part illumination guiding lamp accommodation section 64, and this mark part illumination guiding lamp accommodation section 64 is concavely formed on the surface of bottom housing part 62.In addition, as shown in Figure 2, ring portion illumination guiding lamp 60 and mark part illumination guiding lamp 50 are configured as one, in case stop ring portion illumination guiding lamp 60 and mark part illumination guiding lamp 50 shake when being contained in bottom housing part 62 respectively.
As shown in Figure 3, ring portion illumination guiding lamp accommodation section 66 comprises: lower wall 66a, it for keeping the bottom surface 60a of the side contrary with upper surface 60e in the outside face of ring portion illumination guiding lamp 60 in the gamut comprising light conductor main body 60f and curve 60g, wherein, this upper surface 60e is the face facing with the back side of character board 20; Inner circumferential sidewall 66b, it for keeping the inner circumferential side 60b of ring portion illumination guiding lamp 60 in the gamut comprising light conductor main body 60f and curve 60g; And outer peripheral sidewall 66c, it for keeping the circumferential lateral surface 60c of ring portion illumination guiding lamp 60 in the gamut comprising light conductor main body 60f and curve 60g.
As shown in Figure 3, mark part illumination guiding lamp accommodation section 64 comprises: lower wall 64a, it for keeping the bottom surface 50a of the side contrary with upper surface 50e in the outside face of mark part illumination guiding lamp 50 in the gamut comprising light conductor main body 50f and curve 50g, wherein, this upper surface 50e is the face facing with the back side of character board 20; Inner circumferential sidewall 64b, it for keeping the inner circumferential side 50b of mark part illumination guiding lamp 50 in the gamut comprising light conductor main body 50f and curve 50g; And outer peripheral sidewall 64c, it for keeping the circumferential lateral surface 50c of mark part illumination guiding lamp 50 in the gamut comprising light conductor main body 50f and curve 50g.
On circuit substrate 68, except circuit component is installed, multiple light sources 72,72 of the illumination light being also provided with for penetrating ring portion 40 needed for illumination in the position relative with end face 60d, 60d of ring portion illumination guiding lamp 60 (banded light conductor), and the light source 70,70 of the illumination light being provided with for penetrating mark part 25 needed for illumination in the position relative with end face 50d, 50d of mark part illumination guiding lamp 50.Further, circuit substrate 68 is provided with various warning light, for driving the stepper motor of pointer 30 and the control circuit etc. for controlling the rotation of stepper motor, to omitted herein diagram.
Light source 70 is made up of LED70a.In addition, light source 72 is made up of multiple identical LED, i.e. 3 LED72a, 72b, 72c.
Form 3 LED72a, 72b, 72c of light source 72 can arrange towards the mode of end face 60d, 60d irradiation light of ring portion illumination guiding lamp 60 (banded light conductor).
To be injected into the inside of curve 60g from the light in part 60h of ring portion illumination guiding lamp 60 (banded light conductor) from the light of LED72a, 72b, 72c injection, and at the internal communication of ring portion illumination with guiding lamp 60.Then, light penetrates to outside from the upper surface 60e of ring portion illumination guiding lamp 60 at light conductor main body 60f place and irradiates the ring portion 40 be printed on character board 20 from rear side.Transillumination is carried out in it is possible to the ring portion 40 to character board 20.
The inside of curve 50g is injected into from the light in part 50h of light tagging portion's illumination guiding lamp 50 of LED70a injection, and at the internal communication of mark part illumination with guiding lamp 50.Then, light injects to outside at the upper surface 50e of light conductor main body 50f place tagging portion illumination guiding lamp 50, and irradiates the mark part 25 be printed on character board 20 from rear side.Transillumination is carried out in it is possible to the mark part 25 to character board 20.
In addition, about the action of the light launched from light source 70 when the internal communication of mark part illumination guiding lamp 50 with from the concrete action of the light that light source 72 is launched when the internal communication of ring portion illumination guiding lamp 60, as described later.
About the explanation of the shape of mark part illumination guiding lamp
Next, use Fig. 2 and Fig. 3 that the shape of mark part illumination guiding lamp 50 is described.
As shown in Figure 2, mark part illumination guiding lamp 50 is to make the plan view shape of its light conductor main body 50f be formed as arc-shaped and the mode in covering marking portion 25 is configured at the rear side of character board 20.
And, as shown in Figure 2, the both ends of mark part illumination guiding lamp 50, i.e. light in part 50h, 50h are formed as the end face of curve 50g, 50g respectively, and this curve 50g, 50g are that the width of the upper surface 50e (with reference to Fig. 3) of light conductor main body 50f narrows smoothly and light conductor main body 50f is bending and formed with roughly 90 degree to the direction at the back side away from character board 20.
This light in part 50h, 50h are formed as linearity respectively with the outer edge of consecutive of upper surface 50e.That is, light in part 50h, 50h forms rectangular-shaped end face respectively.
Further, the position relative with light in part 50h, 50h on circuit substrate 68 is provided with light source 70,70 (LED70a, 70a).
About the explanation of the shape of ring portion illumination guiding lamp (banded light conductor)
Next, use Fig. 4 and Fig. 5 that the shape of ring portion illumination guiding lamp 60 (banded light conductor) is described.
Fig. 4 is the block diagram of ring portion illumination guiding lamp 60 (banded light conductor).Fig. 5 (a) is the end elevation of the shape of the light in part 60h representing the end face 60d being formed at ring portion illumination guiding lamp 60.
As shown in Figure 4, the plan view shape of ring portion illumination guiding lamp 60 (banded light conductor) is formed as arc-shaped, and the middle body of circular arc forms light conductor main body 60f.The upper surface 60e of light conductor main body 60f forms the plane width regions such as grade with identical width W.The upper surface 60e of this light conductor main body 60f is configured in the rear side of character board 20 (with reference to Fig. 2) in the mode overlapping with ring portion 40 (with reference to Fig. 2).
And, the upper surface 60e of light conductor main body 60f along with ring portion illumination with end face 60d, 60d of guiding lamp 60 both sides near and spend bending in roughly 90 to the direction at the back side away from character board 20 (with reference to Fig. 2) gradually, thus formation curve 60g, 60g.
This curve 60g, 60g are formed by with consecutive of light conductor main body 60f respectively, and are formed as width W along with near end face 60d, 60d and expand smoothly gradually.In addition, " smoothly expand " refer to width W and expand continuously in the mode without inflection point.
Further, in light conductor main body 60f, the ring portion illumination upper surface 60e of guiding lamp 60 forms plane, but at curve 60g, 60g place, this plane is out of shape gradually in the mode forming the convex surface protruded towards the face side of ring portion illumination guiding lamp 60.That is, the table side outer edge 60i of the end face 60d of ring portion illumination guiding lamp 60 forms convex curve as shown in Fig. 5 (a).
In addition, the bottom surface 60a of ring portion illumination guiding lamp 60 is formed as almost parallel with upper surface 60e in the scope comprising light conductor main body 60f and curve 60g.Thus, the dorsal part outer edge 60j of the end face 60d of ring portion illumination guiding lamp 60 forms the curve parallel with table outer edge, side 60i as shown in Fig. 5 (a).Further, LED72a, 72b, 72c of forming light source 72 configure in the mode of the center of respective LED along table outer edge, side 60i or dorsal part outer edge 60j.
By making the table side outer edge 60i of the end face 60d of ring portion illumination guiding lamp 60 be convex curve, with maintain the space state between adjacent LED like that shown in Fig. 5 (b) and define make table side outer edge 60i ' end face 60d ' linearly situation compared with, the transverse width of end face can be made to reduce the amount corresponding with length Δ W.Like this, by making the transverse width of end face reduce, ring portion illumination guiding lamp 60 (banded light conductor) can be arranged in the small space around character board 20.
About the explanation (1) of action of light being injected into guiding lamp
Next, use Fig. 6 that the path of light when advancing along the extended direction of ring portion illumination guiding lamp 60 being injected into ring portion illumination guiding lamp 60 (banded light conductor) is described.
Fig. 6 is the lateral plan watching ring portion illumination guiding lamp 60 under the state that ring portion illumination guiding lamp 60 (banded light conductor) is located at speed gauge 10a inside on the right side of the paper of Fig. 4.And, in figure 6, show light S1 and penetrate from the some O of the LED72b forming light source 72 and enter into the action of the inside of ring portion illumination guiding lamp 60 from end face 60d.In addition, in the range of exposures of LED72b, launch many light from some O, and the light S1 described in Fig. 6 represents meet in the light of total reflection condition described later at upper surface 60e place any 1 in these many light.
At this, the total reflection condition of light is described.Now suppose that ring portion illumination guiding lamp 60 is polycarbonate systems.Now, critical angle θ c is determined, that is, θ c=sin according to the ratio of refraction n1=1.58 of polycarbonate and the ratio of refraction n2=1.00 of air that contacts with the outside of ring portion illumination guiding lamp 60
-1(n2/n1)=39 °.
Further, such as, advance in the inboard of light in a P1 place generation total internal reflection towards ring portion illumination guiding lamp 60 injected with the incidence angle θ being greater than 39 ° relative to the normal direction of the upper surface 60e of ring portion illumination guiding lamp 60 at a P1 place.
Like this, the light injected with the incidence angle θ that angle is larger than critical angle θ c can not be injected to the outside of ring portion illumination guiding lamp 60 by all reflecting on the surface of ring portion illumination guiding lamp 60.This situation is called total reflection condition.
Namely, as shown in Figure 6, the light S1 of Fig. 6 is in the inside straight ahead of ring portion illumination with guiding lamp 60, and some P1, P2 on upper surface 60e and bottom surface 60a, P3 ... place repeat total internal reflection to occur, while advance towards the inboard of ring portion illumination guiding lamp 60 successively.
The light S1 advanced along the extended direction of ring portion illumination guiding lamp 60 when repeating total internal reflection occurs does not meet total reflection condition during at the some Pn place of such as Fig. 6 (being injected into upper surface 60e with the incidence angle θ being less than 39 °), a part of light S1 reflects in the generation of upper surface 60e place and enters into the inside of ring portion 40.Then, light S1 transmission has the ring portion 40 of light transmission and injects to outside from the surface of character board 20 (with reference to Fig. 2).The light of injection arrives the eyes checking the driver of speed gauge 10a, and therefore, driver sees that ring portion 40 is illuminated by from rear side.
Then, the part being injected in the light of the some Pm on the bottom surface 60a of ring portion illumination guiding lamp 60, not meet total reflection condition light S2 becomes light leak and arrives the lower wall 66a of ring portion illumination guiding lamp accommodation section 66.Then, there is reflection and again turn back to the inside of ring portion illumination guiding lamp 60 in a part of encountering the light of lower wall 66a.
So turn back to light in the light of the inside of ring portion illumination guiding lamp 60, that do not meet total reflection condition when arriving upper surface 60e refraction and transmission ring portion 40 occur at upper surface 60e place and injects to outside from the surface of character board 20 (reference Fig. 2), thus transillumination is carried out to ring portion 40.
In addition, the illumination light being injected into mark part illumination guiding lamp 50 also carries out identical action with the light being injected into ring portion illumination guiding lamp 60, thus carries out transillumination to the mark part 25 (with reference to Fig. 2) of character board 20 (with reference to Fig. 2).
About the explanation (2) of action being injected into the light after guiding lamp
Next, use Fig. 7 A that the path of light when advancing along the extended direction of ring portion illumination guiding lamp 60 being injected into ring portion illumination guiding lamp 60 (banded light conductor) is described.In addition, Fig. 7 A is to clearly illustrate that the end face 60d in the left side in the ring portion illumination guiding lamp 60 shown in Fig. 3 injects and the path of light S3, S4 at the internal communication of ring portion illumination guiding lamp 60, and sees from end face 60d side the end elevation path of light S3, S4 being projected to the result end face 60d.
As shown in Figure 7 A, from the light S3 that the some Q of the LED72a forming light source 72 penetrates above paper.There is total internal reflection in the some Q1 place on the table side outer edge 60i of ring portion illumination with guiding lamp 60, total internal reflection occurs the some Q2 place afterwards on the dorsal part outer edge 60j of ring portion illumination with guiding lamp 60.After, light S3 repeats total internal reflection to occur while advance in the inboard towards ring portion illumination guiding lamp 60 at table outer edge, side 60i and dorsal part outer edge 60j.
Now, repeat generation along with what reflect, the position of light S3 is moved towards the central side of ring portion illumination guiding lamp 60 from the position of LED72a gradually.Further, the amount of movement of light S3 depends on table outer edge, side 60i and the normal direction both the 60j of dorsal part outer edge, is namely formed at the curvature of the convex curve of the outer rim of the end face 60d of ring portion illumination guiding lamp 60.
That is, show the curvature larger (when table outer edge, side 60i and dorsal part outer edge 60j is mild convex curve) of outer edge, side 60i and dorsal part outer edge 60j, the reflection position amount of movement in the horizontal of light S3 is less.This shows, the curvature of table outer edge, side 60i and dorsal part outer edge 60j is larger, and light S3 more can not assemble to the central side of ring portion illumination guiding lamp 60.
At this, inboard along extended direction towards curve 60g is gone, the width of ring portion illumination guiding lamp 60 is narrower, therefore, from the light that the central side of curve 60g passes through, the number of times that reflection occurs in its surface at ring portion illumination guiding lamp 60 is fewer, and the loss of light reduces, and therefore light can arrive farther inboard.That is, guide-lighting efficiency uprises.
Next, in fig. 7, when observing the path of the light S4 penetrated above paper from the some Q ' of the LED72c forming light source 72, there is total internal reflection in the some Q3 place of light S4 on the table side outer edge 60i of ring portion illumination with guiding lamp 60, total internal reflection occurs the some Q4 place afterwards on the dorsal part outer edge 60j of ring portion illumination with guiding lamp 60.After, light S4 repeats total internal reflection to occur, while advance towards the inboard of ring portion illumination guiding lamp 60 at table outer edge, side 60i and dorsal part outer edge 60j.
That is, in the same manner as above, light S4 moves towards the central side of ring portion illumination guiding lamp 60 gradually.
Next, the path using Fig. 7 B to illustrate when when the end face 60d ' of ring portion illumination guiding lamp 60 is formed as rectangular-shaped, to be injected into ring portion illumination guiding lamp 60 (banded light conductor) light is advanced along the extended direction of ring portion illumination guiding lamp 60.In addition, Fig. 7 B is to inject and the path of light S3, S4 at the internal communication of ring portion illumination guiding lamp 60 from end face 60d ' when the left end face 60d clearly illustrated in the ring portion illumination guiding lamp 60 shown in Fig. 3 is rectangular-shaped end face 60d ', and sees from the side of end face 60d ' end elevation path of light S3, S4 being projected to the result end face 60d '.
As shown in Figure 7 B, total internal reflection is there is in the light S3 penetrated above paper from the some R of the LED72a forming light source 72 at the some R1 place of the table side outer edge 60i ' of ring portion illumination guiding lamp 60, total internal reflection is there is afterwards at the ring portion illumination point R2 place of the dorsal part outer edge 60j ' of guiding lamp 60, after, light S3 is while repeat total internal reflection occurs at table outer edge, side 60i ' and dorsal part outer edge 60j ', advances in the inboard towards ring portion illumination guiding lamp 60.
Now, table outer edge, side 60i ' and dorsal part outer edge 60j ' all with light S3 to inject direction orthogonal, therefore, even if light S3 repeats total internal reflection occurs at table outer edge, side 60i ' and dorsal part outer edge 60j ', light S3 position in the horizontal also can not change.That is, light S3 can not move to the central side of ring portion illumination guiding lamp 60.
Similarly, even if the light S4 that the some R ' certainly forming the LED72c of light source 72 penetrates above paper repeats total internal reflection occurs, light S4 position in the horizontal also can not change.That is, light S4 can not move to the central side of ring portion illumination guiding lamp 60.
As mentioned above, with apply compared with the structure with Fig. 7 A of end face 60d of the present utility model, in the structure of Fig. 7 B with the end face 60d ' being formed as rectangular-shaped, when the light of the inside being injected into ring portion illumination guiding lamp 60 is propagated in the mode repeating to occur total internal reflection, light is difficult to assemble to the central side of ring portion illumination guiding lamp 60 (banded light conductor), therefore, the width W in the region of curve 60g narrow smoothly and light is advanced to the region of light conductor main body 60f from curve 60g time, light is difficult to the inboard of directed arrival ring portion illumination guiding lamp 60.
In addition, in fig. 7, when the convex curve that table outer edge, side 60i is formed is circular shape, can more efficiently assemble towards the central side of ring portion illumination guiding lamp 60 at the light of the internal communication of ring portion illumination guiding lamp 60 (banded light conductor), therefore, it is possible to improve the guide-lighting efficiency of light further.
Embodiment 2
Next, another embodiment specifically of the present utility model is described.The present embodiment has the speed gauge 10b with embodiment 1 identical function for realizing, but it is different from embodiment 1 on this aspect of light source 74 as shown in Figure 8, being provided with the light launching many different wave lengths at the end face 60d of ring portion illumination guiding lamp 60 (banded light conductor).In addition, Fig. 8 is the birds-eye view watching ring portion illumination guiding lamp 60 from not shown character board 20 (with reference to Fig. 2) side.
That is, the speed gauge 10b of the present embodiment 2 has the light source 74 be made up of different LED74a, 74b, 74c for carrying out transillumination to ring portion 40 (with reference to Fig. 2).
Specifically, the LED74a LED that to be the LED for transmitting white, LED74b be for transmitting green light, LED74c is the LED for launching blue light.
And, as shown in Figure 8, being provided with the LED74a for launching white light in the 60b side, inner circumferential side of end face 60d, near the central authorities of end face 60d, being provided with the LED74b for launching green glow, being provided with the LED74c for launching blue light in the circumferential lateral surface 60c side of end face 60d.
In addition, on the end face 60d of the opposite side of ring portion illumination guiding lamp 60 (banded light conductor), also removing to be provided with successively the LED74a for launching white light from the 60b side, inner circumferential side of ring portion illumination guiding lamp 60 towards circumferential lateral surface 60c side, for launching the LED74b of green glow and the LED74c for launching blue light, diagram being omitted to this.
Now, the point U of LED74c for the outer circumferential side being certainly located at end face 60d launches and is injected in the inner light of ring portion illumination guiding lamp 60 (banded light conductor), not encounter ring portion illumination guiding lamp 60 inner circumferential side 60b or circumferential lateral surface 60c and only repeats total internal reflection occurs and the most inboard light S5 arriving circumferential lateral surface 60c at upper surface 60e and 60a place, bottom surface, and it arrives the some U1 on circumferential lateral surface 60c as shown in Figure 8.Then, there is total internal reflection at a U1 place and be directed to the inboard of light conductor main body 60f in light S5.
On the other hand, the point V of LED74a for the 60b side, inner circumferential side being certainly located at end face 60d incides in the light of the inside of ring portion illumination guiding lamp 60 (banded light conductor), not encounter ring portion illumination guiding lamp 60 inner circumferential side 60b or circumferential lateral surface 60c and only repeats to recur raw total internal reflection at upper surface 60e and 60a place, bottom surface and arrive the most inboard light S6 of light conductor main body 60f, and it arrives the some V1 on circumferential lateral surface 60c as shown in Figure 8.Then, there is total internal reflection at a V1 place and be directed to the inboard of light conductor main body 60f in light S6.
As mentioned above, because ring portion illumination guiding lamp 60 (banded light conductor) has curvature, therefore, the light source and the LED74c that are located at circumferential lateral surface 60c side create a difference on the path of light with the light source and LED74a being located at 60b side, inner circumferential side, thus different with the position that the light penetrated from LED74a arrives circumferential lateral surface 60c from the light of LED74c injection.Further, the luminous energy of the light source and LED74c injection of being certainly located at 60c side, outer circumferential side side gets at and reaches the more inboard of light conductor main body 60f.That is, guide-lighting efficiency uprises.
Thus, when using the light being directed to the inside of ring portion illumination guiding lamp 60 to carry out transillumination to ring portion 40, compared with the light source of 60b side, inner circumferential side side being certainly located at end face 60d and LED74a, be certainly located at light quantity directed in the light of the LED74c injection of the light source of the 60c side, outer circumferential side side of end face 60d more.
Namely, when the circumferential lateral surface 60c side of end face 60d and 60b side, inner circumferential side arrange the LED of same brightness, with be located at 60b side, inner circumferential side LED light compared with, the light being located at the LED of circumferential lateral surface 60c side can keep stronger intensity be transmitted to farther place in the inside of ring portion illumination guiding lamp 60, thus carries out transillumination to ring portion 40 (with reference to Fig. 2) and make it brighter.
Thus, by will launch white light and the LED74a with higher brightness be located at end face 60d 60b side, inner circumferential side and will green glow be launched and the LED74c with intermediate light be located at end face 60d central authorities near, will blue light be launched and there is the circumferential lateral surface 60c side being located at end face 60d compared with the LED74c of low-light level, transillumination can be carried out with the white light of iso brightness, green glow and blue light to ring portion 40.Namely, when by switching the illuminating state (light and light with non-) of LED74a, LED74b, LED74c and changing the illuminating color thrown light on to ring portion 40, even if change the LED lighted, also can change illuminating color in the situation incision not making the brightness of illumination light change, can quality of lighting be improved thus.
In addition, similarly, even if as usual when the end face 60d by multiple LED different for glow color being located at ring portion illumination guiding lamp 60 (banded light conductor) also switch the LED lighted switch illuminating color, by LED the highest for brightness being located at the 60b side, inner circumferential side of end face 60d, LED minimum for brightness being located at the circumferential lateral surface 60c side of end face 60d, when changing illuminating color at the LED that switching is lighted, also can change illuminating color in the situation incision not making the brightness of illumination light change.
And, consider the luminosity coefficient of set LED, LED the highest for luminosity coefficient be located at the 60b side, inner circumferential side of end face 60d and LED minimum for luminosity coefficient be located at the circumferential lateral surface 60c side of end face 60d, thus, when changing illuminating color at the LED that switching is lighted, illuminating color can be changed in the situation incision not making the brightness of illumination light change.
As mentioned above, adopt the character board lighting structure of the speed gauge 10a of embodiment 1, from by multiple LED72a, 72b, the light that the light source 72 that 72c is formed penetrates from the light in part 60h of end face 60d forming ring portion illumination guiding lamp 60 (banded light conductor) inject and curve 60g internal communication and be directed to by equitant that form is the light conductor main body 60f of aspect by wide with the rear side of character board 20, when this light injects to the rear side of character board 20 from light conductor main body 60f and carries out transillumination to character board 20, because curve 60g is formed as making the width W of wide of formation light conductor main body 60f along with the face of widening expanded smoothly near light in part 60h, therefore, at curve 60g, the light of the inside of ring portion illumination guiding lamp 60 is injected into while carry out total internal reflection while the inboard towards ring portion illumination guiding lamp 60 is propagated in the mode of the central part convergence on the Width towards ring portion illumination guiding lamp 60 from light in part 60h.Thus, can whole character board 20 be become clear and be thrown light on equably.In addition, due to multiple light sources of the light penetrating different wave length respectively can be arranged, therefore, it is possible to carry out to apply the color of the illumination of character board 20 expression effect of change and raising illumination by switching luminous light source.
And, adopt the character board lighting structure of the speed gauge 10a of embodiment 1, in the light in part 60h of ring portion illumination guiding lamp 60 (banded light conductor), formed level and smooth convex curve with the outer edge of wide consecutive of light conductor main body 60f in the mode protruded towards the normal direction in the face of widening being formed at curve 60g, therefore, compared with the situation being formed as linearity with outer edge, the light in part 60h size in the direction of the width of ring portion illumination guiding lamp 60 can be reduced, thus multiple light source can be set in less space.Thus, the degree of freedom that light source is arranged is improved.
In addition, adopt the character board lighting structure of the speed gauge 10a of embodiment 1, because the ring portion 40 of periphery of ring portion illumination guiding lamp 60 (banded light conductor) to the mark part 25 being formed at character board 20 carries out transillumination, therefore, it is possible to throw light on to the mark part of speed gauge 10a and ring portion with different illuminating colors, the expression effect of illumination can be improved thus.
In addition, adopt the character board lighting structure of the speed gauge 10a of embodiment 1, due to the light in part 60h of ring portion illumination guiding lamp 60 (banded light conductor) table side outer edge 60i formed by convex curve be formed as circular shape, therefore, the light S3 (S4) penetrated from the LED72a (72c) for the formation of light source 72 is after the light in part 60h from ring portion illumination guiding lamp 60 (banded light conductor) injects, while there is total internal reflection in the surface of ring portion illumination guiding lamp 60 while advance in the inboard towards ring portion illumination guiding lamp 60, now, because light S3 (S4) assembles further towards the central side of ring portion illumination guiding lamp 60, therefore, it is possible to brighter and evenly brightness ring portion 40 is thrown light on.
In addition, adopt the character board lighting structure of the speed gauge 10b of embodiment 2, for towards multiple LED74a, 74b, the 74c (light source 74) on the end face 60d being internally arranged on ring portion illumination guiding lamp 60 (banded light conductor) of ring portion illumination guiding lamp 60, the light launched from the LED74a that the brightness being located at 60b side, inner circumferential side is higher is advanced in the region that the curvature of ring portion illumination guiding lamp 60 is larger, therefore, the LED74a guide-lighting efficiency of light of launching is lower and the decay of light occurs in the inside of ring portion illumination guiding lamp 60.On the other hand, the light launched from the LED74c that the brightness being located at circumferential lateral surface 60c side is lower is advanced in the region that the curvature of ring portion illumination guiding lamp 60 is less, therefore, the LED74c guide-lighting efficiency of light of launching is higher and decay that is light that is that occur in the inside of ring portion illumination guiding lamp 60 is less.Thus, the light launched from multiple LED74a, 74b, 74c is directed to the inside of ring portion illumination guiding lamp 60 with uniform intensity, thus can throw light on to the ring portion 40 around character board 20 with uniform brightness.
In addition, adopt the character board lighting structure of the speed gauge 10b of embodiment 2, for towards multiple LED74a, 74b, the 74c (light source 74) on the end face 60d being internally arranged on ring portion illumination guiding lamp 60 (banded light conductor) of ring portion illumination guiding lamp 60, the light launched from the LED74a that white light source, the i.e. brightness of being located at 60b side, inner circumferential side are higher is advanced in the region that the curvature of ring portion illumination guiding lamp 60 is larger, therefore, the LED74a guide-lighting efficiency of light of launching is lower and the decay of light occurs in the inside of ring portion illumination guiding lamp 60.On the other hand, the light launched from the LED74c that the brightness being located at circumferential lateral surface 60c side is lower is advanced in the region that the curvature of ring portion illumination guiding lamp 60 is less, therefore, the LED74c guide-lighting efficiency of light of launching is higher and decay that is light that is that occur in the inside of ring portion illumination guiding lamp 60 is less.Thus, the light launched from multiple LED74a, 74b, 74c is directed to the inside of ring portion illumination guiding lamp 60 with uniform intensity, thus can throw light on to the ring portion 40 around character board 20 with uniform brightness.
In addition, embodiment of the present utility model is described for speed gauge 10a, 10b above, but self-evident, also can realize identical lighting structure for other vehicle instruments such as revolution counters.
Below embodiment of the present utility model has been described with reference to the accompanying drawings in detail, but embodiment is only illustration of the present utility model, therefore, the utility model is not limited in the structure of embodiment, self-evident, the design modification etc. in the scope not departing from purport of the present utility model is also contained in the utility model.In addition, such as, when each embodiment comprises multiple structure, even without special record, the utility model also comprises the combination that these structures can realize certainly.
Claims (5)
1. a character board lighting structure, this character board lighting structure comprises: character board, and it is made up of translucent material, and has the mark part of the arrangement in arc-shaped; Banded light conductor, it is made up of translucent material, and is configured at the rear side of described character board; And multiple light source, the plurality of light source is injected to the inside of described banded light conductor for making the end face of light on the extended direction of described banded light conductor, this character board lighting structure is by guiding the described light of the inside being injected into described banded light conductor and making described light penetrate towards the back side of described character board, thus transillumination is carried out to described character board, the feature of this character board lighting structure is
Described banded light conductor comprises:
Light conductor main body, this light conductor main body has identical thickness, for guiding the light being injected into its inside, and, make described light penetrate from the face that itself and described character board are facing and carry out transillumination from rear side to described character board;
Curve, it is formed mutually with described light conductor main body continuously, and has the thickness equal with the thickness of described light conductor main body, and this curve bends towards the direction at the back side away from described character board; And
Light in part, it forms the end face on the extended direction of described curve, for making the light launched from described multiple light source inject to the inside of described banded light conductor,
Described light conductor main body is for overlooking arc-shaped, the face facing with the back side of described character board of described light conductor main body is wide with aspect, described curve makes the width of described wide along with the face of widening expanded smoothly near described light in part, be formed as being formed level and smooth convex curve in the mode protruded towards described normal direction of widening face with the outer edge of described wide consecutive in described light in part, and, described multiple light source is configured in character board lighting structure along described outer edge, the position relative with described light in part.
2. character board lighting structure according to claim 1, is characterized in that,
Described banded light conductor is used for throwing light on to the ring portion of the surrounding being formed at described mark part.
3., according to character board lighting structure according to claim 1 or claim 2, it is characterized in that,
Described convex curve is circular shape.
4. character board lighting structure according to claim 1, is characterized in that,
This character board lighting structure has wavelength multiple light sources different from each other, by in described multiple light source, light source that brightness is the highest is configured in the inner circumferential side of described light in part, by described multiple light source, light source that brightness is minimum is configured in the outer circumferential side of described light in part.
5. character board lighting structure according to claim 4, is characterized in that,
The highest light source of described brightness is white light source.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014009664A JP6232670B2 (en) | 2014-01-22 | 2014-01-22 | Dial illumination structure |
| JP2014-009664 | 2014-01-22 |
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| CN204340854U true CN204340854U (en) | 2015-05-20 |
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| CN201420800196.8U Active CN204340854U (en) | 2014-01-22 | 2014-12-16 | Character board lighting structure |
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| JP (1) | JP6232670B2 (en) |
| CN (1) | CN204340854U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109964101A (en) * | 2016-11-08 | 2019-07-02 | 株式会社电装 | Display apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10031277B2 (en) * | 2015-11-30 | 2018-07-24 | Continental Automotive Systems, Inc. | Light guide assembly |
| JP6680217B2 (en) * | 2017-01-10 | 2020-04-15 | 株式会社デンソー | Vehicle display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4223868B2 (en) * | 2003-06-06 | 2009-02-12 | 矢崎総業株式会社 | Guide light guide plate |
| US7537353B2 (en) * | 2005-06-20 | 2009-05-26 | Continental Automotive Systems Us, Inc. | Flood and back lit instrument cluster |
| JP3148064U (en) * | 2008-11-14 | 2009-01-29 | 株式会社ポータ工業 | Safety waistcoat |
| JP5200915B2 (en) * | 2008-12-19 | 2013-06-05 | 株式会社デンソー | Vehicle display device |
| JP2011047790A (en) * | 2009-08-27 | 2011-03-10 | Calsonic Kansei Corp | Display device |
| JP2012173231A (en) * | 2011-02-24 | 2012-09-10 | Nippon Seiki Co Ltd | Annular light guide device |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109964101A (en) * | 2016-11-08 | 2019-07-02 | 株式会社电装 | Display apparatus |
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| JP2015137935A (en) | 2015-07-30 |
| JP6232670B2 (en) | 2017-11-22 |
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