CN106405985A - Annular flash lamp and hand-held electronic device integrated with same - Google Patents
Annular flash lamp and hand-held electronic device integrated with same Download PDFInfo
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- CN106405985A CN106405985A CN201510427116.8A CN201510427116A CN106405985A CN 106405985 A CN106405985 A CN 106405985A CN 201510427116 A CN201510427116 A CN 201510427116A CN 106405985 A CN106405985 A CN 106405985A
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- doughnut
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Abstract
The present invention discloses an annular flash lamp used for a hand-held electronic device. The annular flash lamp can be a flash lamp based on an annular reflection structure or a flash lamp based on an annular light guide structure. The present invention also discloses the hand-held electronic device integrated with the above annular flash lamp, such as an intelligent mobile phone, a tablet personal computer, etc.
Description
Technical field
It relates to shooting lighting technical field.More specifically, it relates to for hand-held electricity
The doughnut-shaped flash lamp of sub- equipment.
Background technology
At present, most of hand-held electronic equipment, especially mobile phone, panel computer etc. are all oriented light
Thinning, the trend of miniaturization.In this electronic product, often it is integrated with camera
Function, and as supplement light source, flash lamp is the necessary component of camera system,
To obtain satisfied shooting quality when taking pictures.Generally, in this kind of hand-held electronic equipment, flash of light
Lamp is made up of single or double LEDs, and its lighting area is less, and is arranged on camera lens side it is difficult to carry
Shoot illuminating effect for uniform, lead to when subject nearer with the distance of camera lens of this class of electronic devices
When, obvious local lighting not enough phenomenon often occurs in the photo of shooting.Thus, work as use
During the object of the photographic head trickle object of shooting of such flash lamp or closer distance, because flash lamp can not
Export uniform illuminating effect in the region requiring, lead to the photographic quality shooting out to be affected.
In view of this, some ring flash modules have been developed, to provide uniform shooting illuminating effect
With solve the above problems.For example, it is proposed that one in U.S. Patent application US2006/0093344A1
Kind around camera lens flash lamp, in order to provide the work of most of macroshot (such as dental photography,
Surgery photography and feature) needed for illumination.Additionally, in U.S. Patent application
It was also proposed that similar flash unit in US2014/0146225A1.
Those described above flash lamp is straight-down negative.By most of hand-held electronic equipment institute
The installing space having is limited, leads to their light mixing distance very short.Thus, set in these electronics
In standby, even if adopting diffusion sheet, the LED according to the arrangement of straight under type is also visible for user.
However, for aesthetic purpose it may be desirable to these stash as the LED of light source, simultaneously
Remain to provide uniform illumination for photographic/camera.
Content of the invention
According to an aspect of this disclosure, there is provided a kind of ring flash for hand-held electronic equipment
Lamp, this doughnut-shaped flash lamp includes：Annular reflection structure, it has curved reflecting surface, in this arc
The scatter-type reflectance coating that reflectance is more than 90% is attached with reflecting surface；Multiple substantially evenly distributed
In the light source of this annular reflection structure periphery, the normal of the exiting surface of each light source is anti-perpendicular to this annular
Penetrate the central shaft of structure；Wherein, the light that this light source sends is after the reflection of this reflecting part from this reflecting part
Divide and project.
According to another aspect of the disclosure, there is provided another kind of annular for hand-held electronic equipment
Flash lamp, this doughnut-shaped flash lamp includes：The annular guide structure being made up of transparent solid material, its tool
There are first surface and the second surface relative with described first surface, and light is finally from this first surface
Project；Multiple light sources being substantially evenly arranged in around this annular guide structure, the going out of each light source
The normal of bright finish is perpendicular to the central shaft of this annular guide structure；The second surface of this annular guide structure
On be provided with multiple light extraction structures so that a part of light of sending of the plurality of light source is in this annular photoconduction
Project from its first surface after propagating in structure.
Another aspect according to the disclosure, there is provided the hand-held electronic being integrated with above-mentioned flash lamp sets
Standby.
In the disclosure, this hand-held electronic equipment includes, but are not limited to smart mobile phone, panel computer.
On the one hand, when the flash lamp design according to the disclosure can avoid camera lens and object distance excessively near
Produce obvious shade, improve the uniformity of photography, and then obtain good shooting effect.Additionally,
Flash lamp design according to the disclosure can avoid LED light source to be directly observed by user, improves flash of light
The aesthetic property of lamp.Simultaneously it is contemplated that hand-held electronic equipment is frivolous, miniaturization feature, according to this
Disclosed flash lamp design size is little, and thickness of thin can meet the hand-held electronics such as mobile phone, panel computer
The dimensional requirement of equipment.
Brief description
Fig. 1 is the doughnut-shaped flash lamp schematic diagram (top view) according to an embodiment of the invention.
Fig. 2 is the Longitudinal cross section schematic (front view) of the doughnut-shaped flash lamp shown in Fig. 1.
Fig. 3 is the schematic diagram of the curved reflecting surface of doughnut-shaped flash lamp shown in Fig. 1.
Fig. 4 is the doughnut-shaped flash lamp schematic diagram (top view) according to another embodiment of the invention.
Fig. 5 is the Longitudinal cross section schematic (front view) of the doughnut-shaped flash lamp shown in Fig. 4.
Fig. 6 is the doughnut-shaped flash lamp schematic diagram (top view) of the further embodiment according to the present invention.
Fig. 7 is the Longitudinal cross section schematic (front view) of the doughnut-shaped flash lamp shown in Fig. 6.
Fig. 8 is the doughnut-shaped flash lamp schematic diagram (top view) according to another embodiment of the invention.
Fig. 9 is the Longitudinal cross section schematic (front view) of the doughnut-shaped flash lamp shown in Fig. 8.
Figure 10 is the sensing point illustrating the optical property according to the doughnut-shaped flash lamp of the present invention for measurement
Schematic diagram.
Figure 11 is the schematic diagram of the hand-held electronic equipment being integrated with the doughnut-shaped flash lamp according to the present invention.
These accompanying drawings are not drawn necessarily to scale.Used in these accompanying drawings, like reference numerals refer to class
As part.It will be understood, however, that referring to part in given accompanying drawing using reference not
It is intended to limit with the part of same reference numerals mark in another accompanying drawing.
Specific embodiment
Below with reference to the drawings and specific embodiments, the present invention is described in further detail.Will understand
It is contemplated that other embodiment, and without departing from the scope of the present disclosure or spirit, it is possible to implement these
Other embodiment.Therefore, the following detailed description is nonrestrictive.
Unless otherwise specified, in all scenario, in order to express used in description and claims
All numerals of feature sizes, quantity and physical property will be understood as being modified by term " about ".
Therefore, unless the contrary indication, the digital parameters being given in specification and appended are can root
Try hard to the ideal characterisiticses of acquisition according to those skilled in the art using the teaching disclosed in the disclosure and change
Approximation.
As used in this specification and the appended claims, " one ", " a kind of " of singulative,
" described " comprises the embodiment with multiple referents, unless its content obviously do not carry out this
Teaching.As used in this specification and the appended claims, typically including "and/or"
Using term "or" in meaning, unless its content does not obviously carry out this teaching.
With the term of space correlation, including but not limited to " lower section ", " top ", " in ... lower section ", " ...
Below ", " more than ", " at top ", if used in the disclosure, describe for convenient, with
The spatial relationship of one key element and another key element is described.Such and space correlation term comprises except accompanying drawing
Beyond concrete orientation shown and specifically described herein, device is in use or operating different azimuth.
For example, if the object shown in accompanying drawing is squeezed or overturns, it is described as be in other key elements before
Lower section or below portion will be changed in these other key element above or overs.
As used in the present disclosure, for example, if a key element, part or layer are described as wanting with another
Form consistent joint between element, part or layer, on this another key element, part or layer, be connected to
This another key element, part or layer, are coupled with this another key element, part or layer, or with this another will
Element, part or layer contact, then this key element, part or layer can be directly in this specific key element, portion
On part or layer, be directly connected to this specific key element, part or layer, directly and this specific key element,
Part or layer are coupled, or directly contact with this specific key element, part or layer.Or, between
Key element therebetween, part or layer, on this specific key element, part or layer, are connected to this specific
Key element, part or layer, are coupled with this specific key element, part or layer, or with this specific key element,
Part or layer contact., it is directly connected to referred to as directly in another key element when by a key element, part or layer
To another key element, directly it is coupled with another key element, or directly contacts with another key element, then do not exist
Intervenient key element, part or layer.
At least some of aspect of the disclosure be directed to a kind of for hand-held electronic equipment (such as smart mobile phone,
Panel computer), using annular reflection structure doughnut-shaped flash lamp.This doughnut-shaped flash lamp includes annular
Catoptric arrangement and the multiple light sources (such as LED) being arranged on this annular reflection structure periphery.
It is reflecting surface between the inner periphery of this annular reflection structure and excircle, this reflecting surface is preferably umbilicate type
Curved reflecting surface, and the scatter-type reflectance coating of high reflectance is pasted with this reflecting surface.The plurality of
LED is preferably disposed substantially uniformly in this annular reflection structure periphery, and the method for their exiting surface
Line is perpendicular to the central shaft of this annular reflection structure.However, not limited to this, the plurality of LED is acceptable
It is arranged on this annular reflection structure in the way of the requirement that other satisfactions make doughnut-shaped flash lamp uniform in light emission
Around.This doughnut-shaped flash lamp can also include barrier structure, for hiding the plurality of LED as light source.
This barrier structure and the plurality of LED can be relatively closer to the excircles of this annular reflection structure and interior
Excircle in circumference is it is also possible to the relatively inner periphery closer in both.
At least some of aspect of the disclosure is directed to another kind for hand-held electronic equipment (for example intelligent handss
Machine, panel computer), using annular guide structure doughnut-shaped flash lamp.This doughnut-shaped flash lamp includes
Annular guide structure and multiple light sources (the such as light emitting diode being arranged on around this annular guide structure
LED).The plurality of LED is preferably disposed substantially uniformly in around this annular guide structure, and they
Exiting surface normal perpendicular to this annular guide structure central shaft.However, not limited to this, this is many
Individual LED can also be arranged on this ring in the way of the requirement that other satisfactions make doughnut-shaped flash lamp uniform in light emission
Around shape guide structure.This annular guide structure is made up of transparent solid material, and include light finally from
The wherein first surface of injection and the second surface relative with this first surface.In this annular photoconduction knot
Multiple light extraction structures (such as ink printing points) are provided with this second surface of structure.This ring flash
Lamp can also include barrier structure, for hiding the plurality of LED as light source.This barrier structure and
The plurality of LED can be relatively closer to cylindrical in the excircle and inner periphery of this annular guide structure
Week is it is also possible to the relatively inner periphery closer in both.
Fig. 1 is the doughnut-shaped flash lamp schematic diagram (top view) according to an embodiment of the invention.Should
Doughnut-shaped flash lamp is based on annular reflection structure, and its light source is near the excircle of this annular reflection structure.
For clearly illustrating the inside of this doughnut-shaped flash lamp, wherein it is used for blocking light source not shown in Fig. 1 (luminous
Diode) construction.As shown in figure 1, catoptric arrangement 101 is in rotational symmetric annular, its rotary shaft
For 103.Multiple LED (light emitting diode) 102 are essentially homogeneously arranged in annular reflection structure 101
Around, the normal direction of its exiting surface (being the planar section of LED102 in Fig. 1) is perpendicular to annular reflection
The rotary shaft 103 of structure 101.Annular reflection structure 101 body can by polyester material or other can process
The solid material (as ABS engineering plastics, PC Merlon, PMMA polymethyl methacrylate etc.) of molding
Process, the scatter-type reflection of high reflectance on the surface of annular reflection structure 101, need to be adhered to
Film, the EDR film that such as 3M company produces, etc..For obtaining preferable illuminating effect, this scatter-type is anti-
The reflectance penetrating film should be greater than 90%, and its glossiness should be less than 50%, and the number of light source such as LED is not
Less than 2.In the present embodiment, LED quantity is 8, and it goes out light is Lambertian.But, ability
Field technique personnel will be appreciated by, it would however also be possible to employ the light source of other types and quantity.If annular reflection structure
101 thickness is d, and its external diameter is R, and its internal diameter is r, then generally have 1mm ＜ d ＜ 4mm,
20mm ＜ r ＜ R ＜ 50mm.
Fig. 2 is parallel to level by the doughnut-shaped flash lamp in Fig. 1 according to the plane making its inner periphery be located
Face is placed, and with the inner periphery perpendicular to described annular reflection structure 101 and by described inner periphery
The perpendicular in the center of circle intercept the sectional view (front view) of described doughnut-shaped flash lamp and gained.From Fig. 2
In as can be seen that this annular reflection structure 101 inner periphery be higher than its excircle, and its inner periphery and
Connected with the arc-shaped curved surface of umbilicate type between excircle.In this example, this arc-shaped curved surface is this ring
The curved reflecting surface of shape catoptric arrangement 101.On the other hand, as shown in Fig. 2 section obtained as above is wrapped
Include the Part I of central shaft 103 both sides and the Part II positioned at described annular reflection structure, and should
Any one of Part I and Part II (its profile is all rectangular in fig. 2) all include：It is located at
The shield portions 104 in outside, it is made up of opaque material, is used for blocking described light source 102；And
It is in the reflecting part 105 of inner side, it includes relative with described shield portions 104 being attached with described dissipating
The part of emitting reflectance coating.In this example, as shown in Fig. 2 shield portions 104 and LED102 more lean on
Excircle in the inner periphery and excircle of near-ring shape catoptric arrangement 101, and shield portions 104
Section is in the upright rectangle with the excircle one of annular reflection structure 101, and this upright rectangular top
Extend to the inner periphery of annular reflection structure 101.The plurality of light source led 102 is located at described shield portions
Between 104 and described reflecting part 105, the normal direction of their exiting surface and annular reflection structure
Central shaft 103 is vertical.Obviously, this shield portions can be real with this relative position design of the plurality of LED
Now preferably blocking to the plurality of LED.However, those of ordinary skill in the art understand, the present invention's
The shield portions in doughnut-shaped flash lamp based on annular reflection structure are not limited to this knot shown in Fig. 2
Structure.Actually, it would however also be possible to employ other can effectively block the structure of the plurality of LED.For example, may be used
Its section of shield portions need not be in upright rectangle, and it need not be cylindrical with annular reflection structure
Monday body phase is even.
Additionally, being provided with a printing opacity made with transparent material at the top of this annular reflection structure 101
Plate 106.This reflecting part 105 to should annular reflection structure 101 umbilicate type curved reflecting surface.
After the light that LED sends reflects through this curved reflecting surface, through light-passing board 106 outgoing.This light-passing board
106 absorbancies should be greater than 90%, to ensure higher light extraction efficiency.Additionally, this light-passing board 106 is permissible
There is certain mist degree, preferably to hide the plurality of LED102.
Hereinafter, the curved reflecting surface of this annular reflection structure will be described in further detail.As shown in figure 3,
For LED each described, from its central point to the part curved reflecting surface closest with it
Draw level that is parallel with described perpendicular and intersecting with described part curved reflecting surface respectively
Line segment and vertical line segment, then the length of described two lines section be more than 2mm, and be less than 6mm.False further
If described vertical line segment and described horizontal line section are respectively X, Y with the intersection point of described curved reflecting surface,
And set the tangent line of described curved reflecting surface by described X, Y point and described horizontal line section place straight line
Angle be respectively α, β, and define the slope of curved reflecting surface described at described X, Y point respectively
For K (X)=tan α, K (Y)=tan β, then | K (X) | ＜ 0.2, and 0.5 ＜ | K (Y) | ＜ 10.Make so
Restriction be light in order to be able to collect as much as possible and sent using LED, doughnut-shaped flash lamp energy simultaneously
Produce more uniform illuminating effect.
The ring based on annular reflection structure shown in Fig. 1 and Fig. 2 can be prepared using following methods
(plurality of light source is (if LED is (it is assumed herein that selected LED is top for shape flash lamp
Luminous surface attaching type LED) be arranged near the excircle of this annular reflection structure)：
1st, prepare annular reflection structure 101 using rapid prototyping technology (such as 3D printing technique), including
Shield portions 104；
2nd, the EDR reflectance coating that scatter-type reflectance coating such as 3M company produces is attached to annular reflection structure
On 101 curved reflecting surface；
3rd, the flexible PCB being loaded with the surface attaching type LED of top light emitting is fixed on by adhesive
On the inner surface 107 of the shield portions 104 of annular reflection structure 101.Specifically, this kind of LED of selection
Thickness need to be less than 2mm.It is welded on one piece of planar flexible using scolding tin by equidirectional at equal intervals for multiple LED
On circuit board, circuit board shape is banding strip, and circuit board material is copper and polyimides, and it is thick
Spend for 0.3mm, except LED is with the face coat of outer portion for white solder mask.To be loaded with LED's
Flexible PCB is less than the two-sided tape of 0.3mm by thickness or adhesive is fixed on annular reflection knot
On the inner surface 107 of the shield portions 104 of structure 101, and make its end to end in the longitudinal direction cyclization
Shape is so that LED is luminous towards the umbilicate type curved reflecting surface of this annular reflection structure 101.
Although specifically illustrating the concrete setting side of LED taking the surface attaching type LED of top light emitting as a example
Formula, those of ordinary skill in the art understand, also there is other LED set-up modes.For example, if selecting
The surface attaching type LED of 90 degree of lateral emittings, then the flexible PCB being loaded with this kind of LED is little by thickness
It is fixed on the extension of the excircle of annular reflection structure 101 in the two-sided tape of 0.3mm or adhesive
In plane, and its end to end in the longitudinal direction circlewise so that LED towards this annular reflection tie
The umbilicate type curved reflecting surface of structure 101 lights.
Fig. 4 is the doughnut-shaped flash lamp schematic diagram (top view) according to another embodiment of the invention.
This doughnut-shaped flash lamp is equally based on annular reflection structure, and its light source is in this annular reflection structure
Circumference.For clearly illustrating the inside of this doughnut-shaped flash lamp, wherein it is used for not shown in Fig. 4 blocking light
The construction in source (light emitting diode).As shown in figure 4, catoptric arrangement 201 is in rotational symmetric annular, its
Rotary shaft is 203.Multiple LED (light emitting diode) 202 are essentially homogeneously arranged in annular reflection knot
Around structure 201, and the normal direction of its exiting surface (being the planar section of LED202 in Fig. 4) is perpendicular to ring
The rotary shaft 203 of shape catoptric arrangement 201.Annular reflection structure 201 body can by polyester material or other
The solid material of energy machine-shaping processes, and on the surface of annular reflection structure 201, needs to adhere to
The scatter-type reflectance coating of high reflectance, the EDR film that such as 3M company produces, etc..For obtaining preferably
Illuminating effect, the reflectance of this scatter-type reflectance coating should be greater than 90%, and glossiness should be less than 50%, and
The number of light source such as LED is no less than 2.In the present embodiment, LED quantity is 8, and it goes out light and is
Lambertian.But, those skilled in the art will be appreciated by, it would however also be possible to employ the light of other types and quantity
Source.If the thickness of annular reflection structure 401 is d, its external diameter is R, and its internal diameter is r, then generally have
1mm ＜ d ＜ 4mm, 20mm ＜ r ＜ R ＜ 50mm.
Fig. 5 is parallel to level by the doughnut-shaped flash lamp in Fig. 4 according to the plane making its inner periphery be located
Face is placed, and with the inner periphery perpendicular to described annular reflection structure 201 and by described inner periphery
The perpendicular in the center of circle intercept the sectional view (front view) of described doughnut-shaped flash lamp and gained.From Fig. 5
In as can be seen that this annular reflection structure 201 excircle be higher than its inner periphery, and its excircle and
Connected with the arc-shaped curved surface of umbilicate type between inner periphery.In this example, this arc-shaped curved surface is this ring
The curved reflecting surface of shape catoptric arrangement 201.On the other hand, as shown in figure 5, the section of gained includes position
In Part I and the Part II of central shaft 203 both sides of described annular reflection structure, and this first
Any one of part and Part II (its profile is all rectangular in Figure 5) all include：Positioned at inner side
Shield portions 204, it is made up of opaque material, is used for blocking described light source 202；And be in
The reflecting part 205 in outside, it includes relative with described shield portions 204 being attached with described scatter-type
The part of reflectance coating.In this example, as shown in figure 5, shield portions 204 and LED202 are closer to ring
Inner periphery in the inner periphery and excircle of shape catoptric arrangement 201, and the section of shield portions 204
In the upright rectangle with the inner periphery one of annular reflection structure 201, and this upright rectangular top is to ring
The excircle of shape catoptric arrangement 201 extends.The plurality of light source (LED) 202 be located at described shield portions and
Between described reflecting part, the center of the normal direction of their exiting surface and annular reflection structure 201
Axle 203 is vertical.Obviously, this shield portions is achievable right with this relative position design of the plurality of LED
The plurality of LED's preferably blocks.However, those of ordinary skill in the art understand, the present invention based on
Shield portions in the doughnut-shaped flash lamp of annular reflection structure are not limited to this structure shown in Fig. 2.
Actually, it would however also be possible to employ other can effectively block the structure of the plurality of LED.For example, available
Its section of shield portions need not be in upright rectangle, and it need not be with the inner circle Monday of annular reflection structure
Body phase is even.
Additionally, being provided with a printing opacity made with transparent material at the top of this annular reflection structure 201
Plate 206.As shown in figure 5, specifically, the curved reflecting surface of the corresponding umbilicate type in this reflecting part.LED
After the light sending reflects through this curved reflecting surface, through light-passing board 206 outgoing.This light-passing board 206
Absorbance should be greater than 90%, to ensure higher light extraction efficiency.Additionally, this light-passing board 206 can have
Certain mist degree, preferably to hide the plurality of LED202.
Similar doughnut-shaped flash lamp embodiment as shown in Figure 1 to Figure 3, in the present embodiment, right
In each described LED, divide to the part curved reflecting surface closest with it from its central point
Yin Chu not horizontal line that is parallel with described perpendicular and intersecting with described part curved reflecting surface
Section and vertical line segment, then the length of this two lines section is same meets more than 2mm, and is less than 6mm.Enter one
Step assumes this vertical line segment and this states horizontal line section and the intersection point of this curved reflecting surface is respectively X, Y,
And set the tangent line of this curved reflecting surface by described X, Y point and the folder of this horizontal line section place straight line
Angle is respectively α, β, and defines the slope of curved reflecting surface described at this X, Y point and be respectively
K (X)=tan α, K (Y)=tan β, then equally meet | K (X) | ＜ 0.2, and 0.5 ＜ | K (Y) | ＜ 10.
Can be using similar with the above method for preparing the doughnut-shaped flash lamp shown in Fig. 1 to Fig. 2
Method is preparing the doughnut-shaped flash lamp shown in Fig. 4 to Fig. 5.If the surface attaching type from top light emitting
LED, then the flexible PCB being loaded with this kind of LED is fixed on the shield portions 204 of annular reflection structure 201
Inner surface on；And if from 90 degree of lateral emittings surface attaching type LED, be loaded with this kind of LED's
Flexible PCB is fixed in the extension plane of the inner periphery of annular reflection structure 201, and here is no longer superfluous
State.
Although giving the doughnut-shaped flash lamp based on annular reflection structure for the both the above, people in the art
Member will be appreciated by, and these are only two nonrestrictive examples of the present invention.In other words, meet this
The other forms of bright spirit and main idea and the doughnut-shaped flash lamp based on annular reflection structure of construction
It is possible.
Fig. 6 is the schematic diagram (top view) of the doughnut-shaped flash lamp according to another embodiment of the invention.
This doughnut-shaped flash lamp is based on annular guide structure, and its light source is near the excircle of this annular guide structure.
For clearly illustrating the inside of this doughnut-shaped flash lamp, wherein it is used for blocking light source not shown in Fig. 6 (luminous
Diode) construction.In this embodiment, guide structure 301 is (such as saturating by transparent solid material
Bright PMMA plastics etc.) make and ringwise.In addition to light extraction structures position thereon, this ring
The outer surface of shape guide structure 301 be processed to optically smooth so that enter luminous energy therein at it
Inside is totally reflected.Multiple light sources LED 302 are substantially evenly arranged in around annular guide structure,
Their normal direction of exiting surface (being the planar section of LED302 in Fig. 6) and annular guide structure
301 central shaft 303 is vertical.And for LED each described, its central point is to described annular photoconduction
The minimum range of the outer wall of structure is less than 1mm.In the present embodiment, LED quantity is 8, and it goes out light
For Lambertian.But, those skilled in the art will be appreciated by, it would however also be possible to employ other types and other numbers
The light source of amount.But, in order to realize more uniformly shooting illuminating effect, the quantity of light source is general not
Less than 2.If additionally, setting the thickness of annular guide structure as d, external diameter is R, and internal diameter is r, then
Generally there are 1mm ＜ d ＜ 4mm, 20mm ＜ r ＜ R ＜ 50mm.
This is being integrated into hand-held electronic equipment such as intelligence based on the doughnut-shaped flash lamp of annular guide structure
When in energy mobile phone or panel computer, if a relative table of the eyes with user of this annular guide structure
Face is upper surface, and its another surface relative with this upper surface is lower surface, then tie in annular photoconduction
The lower surface of structure 301 is provided with multiple light extraction structures 304.In the present embodiment, light extraction structures are
There are the circular ink printing points of high reflectance.However, those skilled in the art will recognize that can also adopt
Use other kinds of light extraction structures, such as the ink printing points of depression, projection or other shapes, as long as
These light extraction structures can destroy the total reflection of the light at its position, leads to a part of light from it
Position escapes.The preparation process of ink printing points is common screen printing technique, good for reaching
Good light utilization efficiency, the reflectance of ink material need to be more than 50%.Meanwhile, in order to obtain uniform ideal
Illuminating effect, the size and arrangement of ink printing points can also be designed by engineering software.Generally
Beneficial margin be：The radius of ink printing points is more than 0.01 millimeter, less than 0.5 millimeter；Ink prints
The spacing of brush point is more than 0.02 millimeter, less than 2 millimeters.
Fig. 7 is parallel to level by the doughnut-shaped flash lamp in Fig. 6 according to the plane making its inner periphery be located
Face is placed, and with the inner periphery perpendicular to described annular guide structure 301 and by described inner periphery
The perpendicular in the center of circle intercept the sectional view (front view) of described doughnut-shaped flash lamp and gained.As Fig. 7
Shown, light source led 302 is placed in the outside of described annular guide structure, and their exiting surface is (in Fig. 7
Planar section for LED302) normal direction vertical with the central shaft 303 of annular guide structure.As front
Described, the lower surface 305 of annular guide structure 301 is provided with multiple ink printing points 304,
The light that LED302 sends is followed total reflection principle in annular guide structure 301 and is propagated, and works as propagation
During to ink printing points 304 surface, because ink printing points 304 have certain nephelometric turbidity unit, light exists
The reflection at ink printing points 304 on the lower surface 305 of annular guide structure 301 will no longer follow and
Total reflection law, leads to a part of reflected light by outgoing at the upper surface 306 of annular guide structure 301.
The lower section of annular guide structure 301 is provided with a reflectance coating 307, the 3M that such as 3M company produces
VikuitTM ESR.For obtaining preferable effect, this reflectance coating should have the reflectance being not less than 80%,
Its effect is the light collecting the lower surface effusion from annular guide structure, and they are reflected back annular
Guide structure.This reflectance coating can be attached to any smooth body structure surface, and its radius should be not less than
The external diameter R of light guide ring.In FIG. 7, it is shown that 308 parts be (as opaque plastics by opaque material
Or shading rubber belt, etc.) shield portions made, its function is masking LED, it is to avoid the generation of bright spot.
Specifically, in the embodiment shown in figure, shield portions 308 and LED302 are closer to annular photoconduction
Excircle in the inner periphery and excircle of structure 301, and the section of this shield portions 308 be in
The upright rectangle that the reflectance coating 307 of annular guide structure 301 lower section is connected, and its top is to annular
The inner periphery of guide structure extends.Obviously, this relative position of this shield portions and the plurality of LED
Design can achieve preferably blocking to the plurality of LED.However, those of ordinary skill in the art understand,
Shield portions in the doughnut-shaped flash lamp based on annular guide structure of the present invention are not limited to shown in Fig. 7
This structure.Actually, it would however also be possible to employ other can effectively block the structure of the plurality of LED.
For example, its section of available shield portions need not be in upright rectangle, and it need not be tied with annular photoconduction
Reflectance coating one below structure is connected.
The ring based on annular guide structure shown in Fig. 6 and Fig. 7 can be prepared using following methods
(plurality of light source is (if LED is (it is assumed herein that selected LED is top for shape flash lamp
Luminous surface attaching type LED)) be arranged near the excircle of this annular guide structure)：
1st, use the annular guide structure 301 of Shooting Technique preparation, including shield portions 308；
2nd, using silk-screen printing technique, ink point 304 is printed on the lower surface of annular guide structure 301
On 305；
3rd, reflectance coating 307 is attached in the flat configuration of annular guide structure 301 lower section；
4th, the flexible PCB being loaded with the surface attaching type LED of top light emitting is fixed on by adhesive
On the inner surface of shield portions 308 of annular guide structure 301.Specifically, this kind of LED of selection
Thickness need to be less than 2mm.It is welded on one block of planar flexible electricity using scolding tin by equidirectional at equal intervals for multiple LED
On the plate of road, circuit board shape is banding strip, and circuit board material is copper and polyimides, its thickness
For 0.3mm, except LED is with the face coat of outer portion for white solder mask.The soft of LED will be loaded with
Property circuit board the two-sided tape of 0.3mm is less than by thickness or adhesive is fixed on annular guide structure
On 301 inner surface of shield portions 308, and make it end to end in the longitudinal direction circlewise, make
Obtain LED (as shown in Figure 6 and Figure 7, they are located at beyond annular guide structure 301 excircle) to this annular
Guide structure 301 lights.
Although specifically illustrating the concrete setting side of LED taking the surface attaching type LED of top light emitting as a example
Formula, those of ordinary skill in the art understand, also there is other LED set-up modes.For example, if selecting
The surface attaching type LED of 90 degree of lateral emittings, then the flexible PCB being loaded with this kind of LED is little by thickness
It is fixed on the reflectance coating 307 below annular guide structure 301 in the two-sided tape of 0.3mm or adhesive
Upper surface on, closer to the excircle of annular guide structure 301, and its in the longitudinal direction head and the tail
Connect circlewise so that LED (as shown in Figure 6 and Figure 7, they are located at outside annular guide structure 301)
Light to this annular guide structure 301.
Fig. 8 is the schematic diagram (top view) of the doughnut-shaped flash lamp of another embodiment according to the present invention.
This doughnut-shaped flash lamp is based on annular guide structure, and its light source is near the inner periphery of this annular guide structure.
For clearly illustrating the inside of this doughnut-shaped flash lamp, wherein it is used for blocking light source not shown in Fig. 8 (luminous
Diode) construction.In this embodiment, guide structure 401 is made up of transparent solid material
And ringwise structure.In addition to light extraction structures position thereon, this annular guide structure 401
Outer surface is processed to being totally reflected inside it so that entering luminous energy therein of optically smooth.
Multiple LED 402 are evenly arranged in around annular guide structure, they exiting surface (in fig. 8 for
The planar section of LED402) normal direction vertical with the central shaft 403 of annular guide structure 401.And
For LED each described, the minimum range of the outer wall to described annular guide structure for its central point is little
In 1mm.In the present embodiment, LED quantity is 8, and it goes out light is Lambertian.But, this area
Technical staff will be appreciated by, it would however also be possible to employ the light source of other types and other quantity.But, for reality
Now more uniformly shoot illuminating effect, the quantity of light source is general to be no less than 2.If additionally, setting this
The thickness of annular guide structure is d, and external diameter is R, and internal diameter is r, then generally have 1mm ＜ d ＜ 4mm,
20mm ＜ r ＜ R ＜ 50mm.
This is being integrated into hand-held electronic equipment such as intelligence based on the doughnut-shaped flash lamp of annular guide structure
When in energy mobile phone or panel computer, if a relative table of the eyes with user of this annular guide structure
Face is upper surface, and its another surface relative with this upper surface is lower surface, then tie in annular photoconduction
The lower surface of structure 401 is provided with multiple light extraction structures 404.In the present embodiment, light extraction structures are
There are the circular ink printing points of high reflectance.However, those skilled in the art will recognize that can also adopt
Use other kinds of light extraction structures, such as the ink printing points of depression, projection or other shapes, as long as
These light extraction structures can destroy the total reflection of the light at its position, leads to a part of light from it
Position escapes.The preparation process of ink printing points is common screen printing technique, good for reaching
Good light utilization efficiency, the reflectance of ink material need to be more than 50%.Meanwhile, in order to obtain uniform ideal
Illuminating effect, the size and arrangement of ink printing points can also be designed by engineering software.Generally
Beneficial margin be：The radius of ink printing points is more than 0.01 millimeter, less than 0.5 millimeter；Ink prints
The spacing of brush point is more than 0.02 millimeter, less than 2 millimeters.
Fig. 9 is parallel to level by the doughnut-shaped flash lamp in Fig. 8 according to the plane making its inner periphery be located
Face is placed, and with the inner periphery perpendicular to described annular guide structure 401 and by described inner periphery
The perpendicular in the center of circle intercept the sectional view (front view) of described doughnut-shaped flash lamp and gained.As Fig. 9
Shown, LED 402 is placed in the inner side of described annular guide structure, the normal direction of their exiting surface
Vertical with the central shaft 403 of annular guide structure 401.As it was previously stated, in annular guide structure 401
Multiple ink printing points are provided with lower surface 405, the light that LED402 sends is in annular guide structure 401
Inside follow total reflection law to be propagated, when traveling to ink printing points surface, due to ink printing
Point has certain nephelometric turbidity unit, ink printing on the lower surface 405 of annular guide structure 401 for the light
Law will be no longer followed and will be totally reflected in reflection at point, lead to a part of reflected light will tie from annular photoconduction
Outgoing at the upper surface 406 of structure 401.The lower section of annular guide structure 401 is provided with a reflectance coating 407,
The 3M VikuitTM ESR producing as 3M company.This reflectance coating can be attached to any smooth structure
Surface, its radius should be not less than the external diameter R of light guide ring.For obtaining preferable effect, this reflectance coating should have
There is the reflectance being not less than 80%, its effect is the light collecting the lower surface effusion from annular guide structure
Line, and they are reflected back annular guide structure.In fig. 9, it shows 408 parts be by opaque
The shield portions that material (such as opaque plastics or shading rubber belt, etc.) is made, its function is masking LED,
Avoid the generation of bright spot.Specifically, in the embodiment shown in figure, shield portions 408 and LED402
Inner periphery closer in the inner periphery and excircle of annular guide structure 401, and this occlusion part
The section dividing 408 is in the upright rectangle being connected with the reflectance coating 407 of annular guide structure 401 lower section,
And its top extends to the excircle of annular guide structure.Obviously, this shield portions and the plurality of LED
The design of this relative position can achieve preferably blocking to the plurality of LED.However, this area is common
Technical staff understands, the shield portions in the doughnut-shaped flash lamp based on annular guide structure of the present invention are not
It is limited to this structure shown in Fig. 9.Actually, it would however also be possible to employ it is many that other can effectively block this
The structure of individual LED.For example, its section of available shield portions need not be in upright rectangle, and it is not
Must be connected with the reflectance coating one below annular guide structure.
Can be using similar with the above method for preparing the doughnut-shaped flash lamp shown in Fig. 6 to Fig. 7
Method is preparing the doughnut-shaped flash lamp shown in Fig. 8 to Fig. 9.If the surface attaching type from top light emitting
LED, then the flexible PCB being loaded with this kind of LED is fixed on the shield portions 408 of annular guide structure 401
Inner surface on；And if from 90 degree of lateral emittings surface attaching type LED, be loaded with this kind of LED's
Flexible PCB is fixed on the upper surface of reflectance coating 407 of annular guide structure 401 lower section, and more leans on
The inner periphery of near-ring shape guide structure 401, will not be described here.
Although giving the doughnut-shaped flash lamp based on annular guide structure for the both the above, people in the art
Member will be appreciated by, and these are only two nonrestrictive examples of the present invention.In other words, meet this
The other forms of bright spirit and main idea and the doughnut-shaped flash lamp based on annular guide structure of construction
It is possible.
The optical property of above-mentioned doughnut-shaped flash lamp can be measured using Photoelectrical detector.Generally, Ke Yi
Place test screen at the exiting surface certain position of flash lamp, some detections are taken on test screen
Point measures its illumination.Test screen can according to bright applied environment not apart from the distance of flash lamp exiting surface
Change together.Hereinafter, with reference to instantiation, the optical performance test of doughnut-shaped flash lamp will be carried out more
Detailed description.
The following is some embodiments of the disclosure.
Example 1 (flash lamp-light source based on annular reflection structure is near the excircle of ring)
Annular reflection structural body uses Accura 60 type photosensitive resin material, and LED selects Everlight
EHP-C04 type LED (it is the surface attaching type LED of top light emitting) of company, scatter-type reflectance coating makes
EDR reflectance coating with 3M company.Then, according to as described before for preparing as shown in Fig. 1 is to 3
Doughnut-shaped flash lamp method preparing the doughnut-shaped flash lamp in this example.
Afterwards, be respectively 10cm in the exiting surface apart from this doughnut-shaped flash lamp, 20cm, 50cm and
At 100cm, place and detect screen, detect screen parallel with the exiting surface of this doughnut-shaped flash lamp.Detect
Screen size is respectively 25mm*75mm, 250mm*150mm, 640mm*390mm and
1280mm*780mm.Take 9 sensing point P0-P9 respectively on detecting screen, take point mode such as Figure 10 institute
Show.Measure its illumination with light electric explorer at 9 sensing points respectively and record brightness value L0-L9 successively,
And define uniformity of illuminance U=(L1+L2+...L8)/L0.In this example, Photoelectrical detector be Konica-
Minolta T-10A type illumination meter.According to the method prepared doughnut-shaped flash lamp is tested, can
To obtain sensing point illumination data as shown in the following Table 1 and the different uniformity of illuminance detecting screen.
Numerical value unit is lux.
| Point numbering | 10cm | 20cm | 50cm | 100cm |
| 0 | 19700 | 3460 | 630 | 170 |
| 1 | 18000 | 3000 | 572 | 90 |
| 2 | 5630 | 1600 | 300 | 60 |
| 3 | 16000 | 2400 | 400 | 55 |
| 4 | 12000 | 2260 | 368 | 50 |
| 5 | 6000 | 1950 | 350 | 77 |
| 6 | 15100 | 2180 | 350 | 50 |
| 7 | 18590 | 3300 | 500 | 140 |
| 8 | 5000 | 1800 | 390 | 56 |
| The uniformity | 61% | 67% | 64% | 43% |
Table 1
Business ray tracing using the exploitation of Optical Research Associates company of the U.S. is soft
Part LightTools is modeled to the annular reflection structure described by example 1, selects rational emulation
Parameter simultaneously carries out ray tracing, and ray tracing number is 10,000,000.According to above-described method of testing
Carry out emulation testing, sensing point illumination data as shown in table 2 can be obtained and difference detects screen
Uniformity of illuminance.Numerical value unit is lux.
| Point numbering | 10cm | 20cm | 50cm | 100cm |
| 0 | 16937 | 4319 | 766 | 193 |
| 1 | 8736 | 2206 | 412 | 95 |
| 2 | 10623 | 2578 | 418 | 113 |
| 3 | 9878 | 2562 | 424 | 96 |
| 4 | 13669 | 3526 | 618 | 153 |
| 5 | 13269 | 3791 | 588 | 149 |
| 6 | 9563 | 2660 | 456 | 92 |
| 7 | 10557 | 3131 | 469 | 122 |
| 8 | 9866 | 2331 | 371 | 92 |
| The uniformity | 64% | 66% | 61% | 59% |
Table 2
From Tables 1 and 2 data, according to the described doughnut-shaped flash lamp manufacturing of example 1, at one meter
Within detect screen on all have good Uniform Illumination effect on a large scale, its illumination uniformity is in theory
Up to more than 59%.
Example 2 (flash lamp-light source based on annular guide structure is near the excircle of ring)
Annular guide structure body uses the 8N plastic of Evonik company, and LED selects Everlight public
EHP-C04 type LED (it is the surface attaching type LED of top light emitting) of department, scatter-type reflectance coating uses
The ESR reflectance coating of 3M company.Then, according to as described before for preparing as shown in Fig. 6 is to 7
The method of doughnut-shaped flash lamp is preparing the doughnut-shaped flash lamp in this example.
Using with method of testing, simulation software identical method of testing, simulation software in example 1, right
In example 2, the flash lamp based on annular guide structure of preparation carries out simulation calculation, can get as table 3 institute
The sensing point illumination data shown and the different uniformity of illuminance detecting screen, numerical value unit is lux.
Can see from simulation result, this annular guide structure equally can be on the detection screen within a meter
Realize good Uniform Illumination effect on a large scale, its illumination uniformity is in theory up to more than 76%.
| Point numbering | 10cm | 20cm | 50cm | 100cm |
| 0 | 9654 | 2428 | 386 | 89 |
| 1 | 6866 | 2349 | 333 | 82 |
| 2 | 10056 | 1851 | 311 | 83 |
| 3 | 6431 | 2411 | 324 | 84 |
| 4 | 9938 | 1954 | 311 | 85 |
| 5 | 6506 | 1785 | 290 | 72 |
| 6 | 6264 | 1791 | 292 | 73 |
| 7 | 6803 | 1884 | 292 | 73 |
| 8 | 5986 | 1646 | 282 | 71 |
| The uniformity | 76% | 81% | 79% | 88% |
Table 3
Figure 11 is to illustrate to be integrated with the hand-held electronic equipment of the doughnut-shaped flash lamp according to the present invention (as intelligence
Can mobile phone or panel computer) schematic diagram.501 is the back side of hand-held electronic equipment, and 503 take the photograph for it
Shadow or pick-up lenss, doughnut-shaped flash lamp 502 (doughnut-shaped flash lamp in such as example 1 and example 2) embeds
On the surface at this back side 501, and surround photography or pick-up lenss 503.More specifically, this photography or take the photograph
As camera lens 503 and doughnut-shaped flash lamp 502 are concentric relation.
A kind of item 1. doughnut-shaped flash lamps for hand-held electronic equipment, this doughnut-shaped flash lamp includes：
Annular reflection structure, it has curved reflecting surface, is attached with described curved reflecting surface
The scatter-type reflectance coating that reflectance is more than 90%；
Multiple light sources being substantially evenly arranged in described annular reflection structure periphery, each described light source
Exiting surface normal perpendicular to described annular reflection structure central shaft；Wherein, described light source sends
Light reflect through described reflecting part after from described reflecting part project.2. the annular sudden strain of a muscle as described in item 1
Light lamp, wherein, by described annular reflection structure according to the plane making its inner periphery be located parallel to level
The mode in face is placed, and with the inner periphery perpendicular to described annular reflection structure and by described inner circle
The perpendicular in the center of circle in week intercepts described annular reflection structure, and gained section is included respectively positioned at described
The Part I of central shaft both sides of annular reflection structure and Part II, and described Part I and
Any one of two parts all include：
It is in the shield portions of the first side of described light source, it is made up of opaque material,
For blocking described light source；And
It is in the reflecting part of the second side of described light source, it includes and described shield portions
The relative part being attached with described scatter-type reflectance coating, described second side is different from described first side.
Item 3. doughnut-shaped flash lamps as described in item 2, wherein, described shield portions and described light source more lean on
Excircle in the inner periphery and excircle of closely described annular reflection structure.
Item 4. doughnut-shaped flash lamps as described in item 2, wherein, described shield portions and described light source more lean on
Inner periphery in the inner periphery and excircle of closely described annular reflection structure.
5. doughnut-shaped flash lamps as described in item 3 or 4, wherein, for light source each described, from
Its central point is drawn respectively to the part curved reflecting surface closest with it and is vertically put down with described
Face is parallel and horizontal line section that is intersecting with described part curved reflecting surface and vertical line segment, then institute
The length stating two lines section is more than 2mm, and is less than 6mm.
Item 6. doughnut-shaped flash lamps as described in item 3 or 4, wherein, for light source each described, if
Described vertical line segment and described horizontal line section are respectively X, Y with the intersection point of described curved reflecting surface, and
If by the tangent line of described curved reflecting surface of described X, Y point and described horizontal line section place straight line
The slope that angle is respectively curved reflecting surface described at α, β, and described X, Y point of definition is respectively
K (X)=tan α, K (Y)=tan β, then | K (X) | ＜ 0.2, and 0.5 ＜ | K (Y) | ＜ 10.
Item 7. doughnut-shaped flash lamps as any one of item 1 to 6, wherein, each described light source is
LED.
Item 8. doughnut-shaped flash lamps as any one of item 1 to 7, wherein, if annular reflection structure
Thickness, external diameter, internal diameter be respectively d, R, r, then meet 1mm ＜ d ＜ 4mm, 20mm ＜ r ＜ R ＜ 50mm.
Item 9. doughnut-shaped flash lamps as any one of item 1 to 8, wherein, described hand-held electronic
Equipment is smart mobile phone or panel computer.
The hand-held electronic of the doughnut-shaped flash lamp any one of a kind of item 10. integrated 1-8 just like item
Equipment.
Item 11. hand-held electronic equipments as described in item 10, wherein, described hand-held electronic equipment is
Smart mobile phone or panel computer.
A kind of item 12. doughnut-shaped flash lamps for hand-held electronic equipment, including：
The annular guide structure being made up of transparent solid material, it has first surface and with described
The relative second surface in one surface, and light is finally from the injection of described first surface；
Multiple light sources being substantially evenly arranged in around described annular guide structure, each described light source
Exiting surface normal perpendicular to described annular guide structure central shaft；
It is provided with multiple light extraction structures so that institute on the described second surface of described annular guide structure
State after a part of light that multiple light sources send is propagated in described annular guide structure from its first surface
Project；
13, the doughnut-shaped flash lamp as described in item 12, wherein, by described annular guide structure according to making
Described first surface is placed parallel to the mode of horizontal plane, and with perpendicular to described first surface and logical
The perpendicular crossing the center of circle of described first surface intercepts described annular guide structure, and gained section includes
It is located at the Part I of described central shaft both sides and the Part II of described annular guide structure respectively, and
Any one of described Part I and Part II all include：
It is in the shield portions of the first side of described light source, it is made up of opaque material,
For blocking described light source；And
It is in the light guide body part of the second side of described light source, described second side is different from described first
Side.
Item 14. doughnut-shaped flash lamps as described in item 13, wherein, described shield portions and described light source are more
Excircle in the inner periphery and excircle of described annular guide structure.
Item 15. doughnut-shaped flash lamps as described in item 13, wherein, described shield portions and described light source are more
Inner periphery in the inner periphery and excircle of described annular guide structure.
Item 16. doughnut-shaped flash lamps as any one of item 12 to 15, also include being arranged on described ring
Reflectance coating below the described second surface of shape guide structure, its reflection is from described annular guide structure
The light that described second surface spills, makes them project from the described first surface of described annular guide structure.
Item 17. doughnut-shaped flash lamps as any one of item 12 to 16, wherein, for each institute
State light source, the minimum range of the outer wall to described annular guide structure for its central point is less than 1mm.
Item 18. doughnut-shaped flash lamps as any one of item 12 to 17, each described light source is LED.
Item 19. doughnut-shaped flash lamps as any one of item 12 to 18, wherein, if described annular is anti-
Penetrate the thickness of structure, external diameter, internal diameter are respectively d, R, r, then meet 1mm ＜ d ＜ 4mm, 20mm ＜ r ＜ R ＜ 50mm.
Item 20. doughnut-shaped flash lamps as any one of item 12 to 19, wherein, the plurality of light carries
Take multiple printing points that structure is that the ink being more than 50% with reflectance is printed, each described printing points
Radius is more than 0.01mm, and is less than 0.5mm, and the spacing between them is more than 0.02mm, and little
In 2mm.
Item 21. doughnut-shaped flash lamps as any one of item 16 to 20, wherein, described reflectance coating
Radius is more than or equal to the external diameter R of described annular guide structure.
Item 22. doughnut-shaped flash lamps as any one of item 12 to 21, wherein, described hand-held electricity
Sub- equipment is smart mobile phone or panel computer.
The hand-held electricity of the doughnut-shaped flash lamp any one of a kind of item 23. integrated 12-21 just like item
Sub- equipment.
Item 24. hand-held electronic equipments as described in item 23, wherein, described hand-held electronic equipment is
Smart mobile phone or panel computer.
Although specific embodiment, art technology have been shown and described in the disclosure
Personnel will be appreciated by, and can be replaced shown and described with various replacements and/or equivalent embodiment
Specific embodiment, without deviating from the scope of the present disclosure.The application is intended to beg for including in the disclosure
By any improvement of specific embodiment or change.Therefore, the disclosure be limited solely by claim and
Its equivalent.
Claims (24)
1. a kind of doughnut-shaped flash lamp for hand-held electronic equipment, including：
Annular reflection structure, it has curved reflecting surface, on described curved reflecting surface
It is attached with the scatter-type reflectance coating that reflectance is more than 90%；And
Multiple light sources being substantially evenly arranged in described annular reflection structure periphery, each institute
State light source exiting surface normal perpendicular to described annular reflection structure central shaft；
Wherein, the light that described light source sends reflect through described reflecting part after from described reflecting part
Divide and project.
2. doughnut-shaped flash lamp as claimed in claim 1, wherein, described annular reflection is tied
Structure is placed parallel to the mode of horizontal plane according to the plane making its inner periphery be located, and with perpendicular to
The inner periphery of described annular reflection structure and being cut by the perpendicular in the center of circle of described inner periphery
Take described annular reflection structure, gained section includes being located at respectively in described annular reflection structure
Appointing in the Part I and Part II, and described Part I and Part II of heart axle both sides
One all includes：
It is in the shield portions of the first side of described light source, it is by opaque material
Make, be used for blocking described light source；And
It is in the reflecting part of the second side of described light source, it includes and described screening
The part being attached with described scatter-type reflectance coating of stopper split-phase pair, described second side is different from institute
State the first side.
3. doughnut-shaped flash lamp as claimed in claim 2, wherein, described shield portions and institute
State light source closer to the excircle in the inner periphery and excircle of described annular reflection structure.
4. doughnut-shaped flash lamp as claimed in claim 2, wherein, described shield portions and institute
State light source closer to the inner periphery in the inner periphery and excircle of described annular reflection structure.
5. the doughnut-shaped flash lamp as described in claim 3 or 4, wherein, for each institute
State light source, draw respectively to the part curved reflecting surface closest with it from its central point
Horizontal line section that is parallel with described perpendicular and intersecting with described part curved reflecting surface
With vertical line segment, then the length of described two lines section be more than 2mm, and be less than 6mm.
6. the doughnut-shaped flash lamp as described in claim 3 or 4, wherein, for each institute
State light source, if the intersection point of described vertical line segment and described horizontal line section and described curved reflecting surface
Be respectively X, Y, and set the tangent line of described curved reflecting surface by described X, Y point with
The angle of described horizontal line section place straight line is respectively α, β, and defines at described X, Y point
The slope of described curved reflecting surface is respectively K (X)=tan α, K (Y)=tan β, then
|K(X)|<0.2, and 0.5<|K(Y)|<10.
7. the doughnut-shaped flash lamp as any one of claim 1-6, wherein, each institute
Stating light source is LED.
8. the doughnut-shaped flash lamp as any one of claim 1-7, wherein, if annular
The thickness of catoptric arrangement, external diameter, internal diameter are respectively d, R, r, then meet 1mm<d<4mm,
20mm<r<R<50mm.
9. the doughnut-shaped flash lamp as any one of claim 1 to 8, wherein, described
Hand-held electronic equipment is smart mobile phone or panel computer.
10. a kind of integrated just like the doughnut-shaped flash lamp any one of claim 1-8
Hand-held electronic equipment.
11. hand-held electronic equipments as claimed in claim 10, wherein, described hand-held
Electronic equipment is smart mobile phone or panel computer.
A kind of 12. doughnut-shaped flash lamps for hand-held electronic equipment, including：
The annular guide structure being made up of transparent solid material, its have first surface and with
The relative second surface of described first surface, and light is finally from the injection of described first surface；
Multiple light sources being substantially evenly arranged in around described annular guide structure, each institute
State light source exiting surface normal perpendicular to described annular guide structure central shaft；
It is provided with multiple light extraction structures on the described second surface of described annular guide structure,
After a part of light that the plurality of light source sends is propagated in described annular guide structure from
Its first surface projects.
13. flash lamies as claimed in claim 12, wherein, by described annular guide structure
According to making the mode parallel to horizontal plane for the described first surface place, and with perpendicular to described first
The perpendicular in surface and the center of circle passing through described first surface intercepts described annular guide structure,
Gained section includes being located at the first of the described central shaft both sides of described annular guide structure respectively
Part and Part II, and any one of described Part I and Part II all include：
It is in the shield portions of the first side of described light source, it is by opaque material
Make, be used for blocking described light source；And
It is in the light guide body part of the second side of described light source, described second side is different from institute
State the first side.
14. doughnut-shaped flash lamps as claimed in claim 13, wherein, described shield portions and
Described light source closer to described annular guide structure inner periphery and excircle in cylindrical
Week.
15. doughnut-shaped flash lamps as claimed in claim 13, wherein, described shield portions and
Described light source closer to described annular guide structure inner periphery and excircle in cylindrical
Week.
16. doughnut-shaped flash lamps as any one of claim 12 to 15, also include
It is arranged on the reflectance coating below the described second surface of described annular guide structure, its reflection is from institute
State the light that the described second surface of annular guide structure spills, so that them is tied from described annular photoconduction
The described first surface of structure projects.
17. doughnut-shaped flash lamps as any one of claim 12 to 16, wherein,
For light source each described, the narrow spacing of the outer wall to described annular guide structure for its central point
From less than 1mm.
18. doughnut-shaped flash lamps as any one of claim 12-17, described in each
Light source is LED.
19. doughnut-shaped flash lamps as any one of claim 12 to 18, wherein,
If the thickness of described annular reflection structure, external diameter, internal diameter are respectively d, R, r, then meet
1mm<d<4mm, 20mm<r<R<50mm.
20. doughnut-shaped flash lamps as any one of claim 12 to 19, wherein,
The plurality of light extraction structures are multiple printing points that the ink being more than 50% with reflectance is printed,
The radius of each described printing points is more than 0.01mm, and is less than 0.5mm, and between them
Spacing is more than 0.02mm, and is less than 2mm.
21. doughnut-shaped flash lamps as any one of claim 16 to 20, wherein,
The radius of described reflectance coating is more than or equal to the external diameter R of described annular guide structure.
22. doughnut-shaped flash lamps as any one of claim 12 to 21, wherein,
Described hand-held electronic equipment is smart mobile phone or panel computer.
23. a kind of integrated just like the doughnut-shaped flash lamp any one of claim 12-21
Hand-held electronic equipment.
24. hand-held electronic equipments as claimed in claim 23, wherein, described hand-held
Electronic equipment is smart mobile phone or panel computer.
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| CN201510427116.8A CN106405985A (en) | 2015-07-20 | 2015-07-20 | Annular flash lamp and hand-held electronic device integrated with same |
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| CN201510427116.8A CN106405985A (en) | 2015-07-20 | 2015-07-20 | Annular flash lamp and hand-held electronic device integrated with same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI646283B (en) * | 2018-06-12 | 2019-01-01 | 和碩聯合科技股份有限公司 | Button indicator light and light guide ring assembly |
| WO2021238364A1 (en) * | 2020-05-26 | 2021-12-02 | Oppo广东移动通信有限公司 | Camera module and mobile terminal |
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| WO2009058034A1 (en) * | 2007-11-01 | 2009-05-07 | Enlight Photo Limited | Improved ring light diffuser |
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| WO2021238364A1 (en) * | 2020-05-26 | 2021-12-02 | Oppo广东移动通信有限公司 | Camera module and mobile terminal |
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