CN208477268U - A kind of back light system of head-up display device - Google Patents
A kind of back light system of head-up display device Download PDFInfo
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- CN208477268U CN208477268U CN201821246692.8U CN201821246692U CN208477268U CN 208477268 U CN208477268 U CN 208477268U CN 201821246692 U CN201821246692 U CN 201821246692U CN 208477268 U CN208477268 U CN 208477268U
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Abstract
The utility model system provides a kind of back light system of head-up display device, and including the pcb board, light harvesting component and LCD panel set gradually, the side of pcb board is equipped with n light source；Light harvesting component includes even optical lens and n light collecting lens unit, and the light-emitting surface of even optical lens is equipped with microlens array structure；Light collecting lens unit includes outer lens and interior len, the outer wall of outer lens is equipped with the first fully reflecting surface, outer lens incidence surface is equipped with the first groove, interior len is set in the first groove, the outer wall of interior len is equipped with the second fully reflecting surface, interior len incidence surface is equipped with the second groove, and the bottom of the second groove is equipped with center plane of refraction, and light source is located at the center of the first groove.The utility model light capacity gauge is strong, can effectively improve the utilization rate of energy, and even light effect is good, can effectively ensure that display brightness and Colour are uniform, can be effectively reduced the thickness of light collecting lens unit while ensuring light collecting effect, occupy little space.
Description
Technical field
The utility model relates to back light systems, specifically disclose a kind of back light system of head-up display device.
Background technique
Head-up display device is also known as head-up display (HUD), is the flight supplementary instrument on aircraft at present applied on aircraft, and head-up is
Refer to that pilot can see ... without looking down the important information of his needs.Head-up display device appears in military aircraft earliest
On, it bows for reducing pilot and checks the frequency of instrument, attention is avoided to interrupt and lose the control to situation awareness, it is existing
The automobile in generation also gradually starts to install head-up display device.
Head-up display device need bright and clear daytime can normal use, then its maximum brightness of image needs reaches
It is even higher to 15000 nits.Liquid crystal display (LCD) is the common image display generating unit of head-up display device, but
Liquid crystal display itself does not shine, and backlight source module is needed to provide backlighting for, due to the transmitance of liquid crystal display 5% or so
It is relatively low, while in view of the reflection of preceding shelves glass and other energy losses, general backlight module need to be arranged brightness and exist
It is more than hundreds of thousands nit.
When the backlight module of high brightness is applied to vehicle-mounted head-up display device, need to reduce occupied space and energy consumption simultaneously,
In the prior art, vehicle-mounted head-up display device generally includes light source, convex lens array and liquid crystal display, passes through convex lens array
The light that light source issues is converged on liquid crystal display, but can not be by using the light energy that convex lens array will lead to wide-angle
It directly collimates, it will form the stray light of escape, capacity usage ratio is low, and convex lens array will appear when converging light beam of light source
Optical imaging effect, it is uneven so as to cause Luminance Distribution, or even can due to light source surface color difference and there is coloration point
Cloth is uneven, and the thickness of convex lens is big, and convex lens and light source need certain spacing, and light source needs to be arranged in focus
Place, causes head-up display device occupied space big, and light mixing effect is poor, eventually leads to poor display effect；In the prior art, portion
Dividing vehicle-mounted head-up display device includes light source, the bowl-shape light concentrating components and liquid crystal display for being provided with fully reflecting surface, by being all-trans
The mode penetrated converges light, and the optics utilization rate of this structure is high, but light concentrating components volume is big, and light mixing need it is biggish away from
From the occupied space of head-up display device is big, light mixing effect can be reduced if reducing light mixing distance, to reduce display effect
Fruit.
Utility model content
Based on this, it is necessary to be directed to prior art problem, provide a kind of back light system of head-up display device, light collects energy
Power is strong, and even light effect is good, and overall structure is frivolous, occupies little space.
To solve prior art problem, the utility model discloses a kind of back light system of head-up display device, including successively
Pcb board, light harvesting component and the LCD panel of setting, pcb board are equipped with the n light sources being arranged in array, n close to the side of light harvesting component
For the integer greater than 1；
Light harvesting component includes even optical lens and the n light collecting lens units being arranged in array, and the light-emitting surface of even optical lens is set
There is microlens array structure, light collecting lens unit is located at close to the incidence surface side of even optical lens；
Light collecting lens unit includes in bowl-shape outer lens and in bowl-shape interior len, and the thickness and radius of outer lens are distinguished
For D and R, the thickness and radius of interior len are respectively d and r, D > d, R > r, and outer lens are equipped with first far from the outer wall in axle center and are all-trans
Face is penetrated, the first groove being recessed to even optical lens is equipped at outer lens incidence surface center, interior len is set in the first groove, interior
Mirror is equipped with the second fully reflecting surface far from the outer wall in axle center, and it is recessed to be equipped with second to be recessed to even optical lens at interior len incidence surface center
The bottom of slot, the second groove is equipped with center plane of refraction, and light source is located at the center of the first groove.
Further, microlens array structure is the fly eye lens array of concavees lens.
Further, the radius of curvature of single concavees lens unit is 0.5~15mm in microlens array structure.
Further, the spacing of two neighboring concavees lens unit is 1~5mm in microlens array structure.
Further, the first fully reflecting surface and the second fully reflecting surface are broken face structure or smooth continuous surface structure.
Further, the mean obliquity of the first fully reflecting surface and the second fully reflecting surface is 30~60 degree.
Further, light collecting lens unit further includes in bowl-shape middle part lens, and middle part lens are set to outer lens and interior
Between mirror, middle part lens are set in the first groove, and middle part lens are equipped with third fully reflecting surface, middle part lens far from the outer wall in axle center
The third groove being recessed to even optical lens is equipped at incidence surface center, interior len is set in third groove.
Further, middle part lens are equipped with k, and k is the integer greater than 1, and the thickness and radius of middle part lens are respectively Pk
And Qk, D > Pk> d, R > Qk> r, with PkAnd QkSuccessively decrease from outside to inside and be arranged each middle part lens, interior len, which is set to, possesses PkminWith
QkminMiddle part lens third groove in, possess PkmaxAnd QkmaxMiddle part lens be set to the first groove in.
Further, optical diaphragm is additionally provided between LCD panel and light harvesting component.
The utility model has the following beneficial effects: the utility model discloses a kind of back light system of head-up display device, setting
Packaging type is totally reflected structure, and light capacity gauge is strong, can effectively improve the utilization rate of energy, and use cost is low, and lenticule is arranged
Array structure, even light effect is good, can effectively ensure that display brightness and Colour are uniform, in addition, light collecting lens unit is in more
Layer gradient setting, light collecting lens unit are divided into the class Fresnel lens structure of multiple flank of tooth, can efficiently use light collecting lens
The inner space of unit carries out light mixing, and light mixing distance is shorter, can be effectively reduced light collecting lens while ensuring light collecting effect
The overall structure of the thickness of unit, back light system is frivolous, occupies little space；The display picture of vehicle-mounted head-up display device is generally
100mm*60mm, the light beam that back light system is finally collected into smaller angle are irradiated on liquid crystal display, reduce back light system
Beam angle can maximally utilize the light of light source sending, so that the zero degree view angle brightness of backlight is improved, to improve liquid crystal
The brightness of display screen.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of an embodiment of the present invention.
Fig. 3 is the schematic perspective view of light harvesting component in the utility model.
Fig. 4 is the schematic perspective view at another visual angle of light harvesting component in the utility model.
Appended drawing reference are as follows: pcb board 10, light source 11, light harvesting component 20, even optical lens 21, microlens array structure 211, collection
Optical lens unit 22, outer lens 23, the first fully reflecting surface 231, the first groove 232, interior len 24, the second fully reflecting surface 241,
Two grooves 242, center plane of refraction 243, middle part lens 25, third fully reflecting surface 251, third groove 252, LCD plate 30, optics
Diaphragm 40.
Specific embodiment
For the feature, technological means and specific purposes achieved, function that can further appreciate that the utility model, below
The utility model is described in further detail in conjunction with attached drawing and specific embodiment.
Referring to figs. 1 to Fig. 4.
The utility model discloses a kind of back light system of head-up display device, as shown in Figure 1, including the PCB set gradually
Plate 10, light harvesting component 20 and LCD panel 30, light harvesting component 20 are the optical component of integrated injection molding, and pcb board 10 is close to collection
The side of light component 20 is equipped with the n light sources 11 being arranged in array, it is preferable that light source 11 is LED chip, and n is whole greater than 1
Number；
As shown in Figure 3,4, light harvesting component 20 includes that integrally formed even optical lens 21 and the n light harvestings being arranged in array are saturating
Mirror unit 22, the light-emitting surface of even optical lens 21 are equipped with microlens array structure 211, and light collecting lens unit 22 is located at saturating close to even light
The incidence surface side of mirror 21, light collecting lens unit 22 are the structure of similar Fresnel Lenses, can be effectively reduced light harvesting component 20
Whole thickness, to reduce the thickness and weight of back light system entirety；
Light collecting lens unit 22 include in bowl-shape outer lens 23 and in bowl-shape interior len 24, the thickness of outer lens 23 and
Radius is respectively D and R, and the thickness and radius of interior len 24 are respectively d and r, D > d, R > r, the large radius light-emitting surface of outer lens 23
It is arranged with close to even optical lens 21, outer lens 23 are equipped with the first fully reflecting surface 231, the smaller part of outer lens 23 far from the outer wall in axle center
The first groove 232 being recessed to even optical lens 21 is equipped at diameter incidence surface center, interior len 24 is set in the first groove 232, interior
The large radius light-emitting surface of lens 24 is arranged close to the bottom of the first groove 232, and interior len 24 is equipped with second far from the outer wall in axle center
Fully reflecting surface 241 is equipped with the second groove 242 being recessed to even optical lens 21 at the minor radius incidence surface center of interior len 24, the
The bottom of two grooves 242 is equipped with center plane of refraction 243, and center plane of refraction 243 protrudes to the side far from even optical lens 21, has
The effect of light is converged, each light source 11 is located at the center of each first groove 232, the positive centering of the light-emitting surface of light source 11
In gradient to central concave, the Fresnelization of multi-gradient setting is totally reflected knot for heart plane of refraction 243, i.e. light collecting lens unit 22
Structure can make light collecting lens unit 22 more frivolous, and light mixing distance is shorter.
The working process of the utility model is as follows: the light that light source 11 issues respectively enters interior len 24 and outer lens 23, into
Enter the light of outer lens 23 reflecting and collecting is realized by the first fully reflecting surface 231, the light into interior len 24 passes through respectively
The refraction of heart plane of refraction 243 and 241 reflecting and collecting of the second fully reflecting surface；The light that light collecting lens unit 22 is collected passes through its exit facet
Into even optical lens 21, the microlens array structure 211 of even optical lens 21 effectively can carry out light mixing processing to light, promote light
Line realizes light mixing in small distance, so that the light beam for forming brightness and evenness is irradiated to LCD panel 30 i.e. liquid crystal display
On.
The utility model is arranged packaging type and is totally reflected structure, and light capacity gauge is strong, can effectively improve the utilization rate of energy,
Use cost is low, microlens array structure 211 is arranged, even light effect is good, can effectively ensure that display brightness and Colour are equal
Even, in addition, light collecting lens unit 22 is arranged in multi-gradient, the class Fresnel that light collecting lens unit 22 is divided into multiple flank of tooth is saturating
Mirror structure, the inner space that can efficiently use light collecting lens unit 22 carry out light mixing, and light mixing distance is shorter, are ensuring to collect light efficiency
It can be effectively reduced the thickness of light collecting lens unit 22 while fruit, the overall structure of back light system is frivolous, occupies little space；Vehicle
The display picture for carrying head-up display device is generally 100mm*60mm, and back light system is finally collected into the light beam irradiation of smaller angle
Onto liquid crystal display, the beam angle for reducing back light system can maximally utilize the light of light source sending, to improve backlight
The zero degree view angle brightness in source, to improve the brightness of liquid crystal display.
In the present embodiment, microlens array structure 211 is the fly eye lens array of concavees lens, and concavees lens are in even optical lens
21 light-emitting surface to light collecting lens unit 22 be recessed, with divergent rays ability, beam angle can be made to become larger, promote light with
The light mixing effect of neighbouring light increases, even if being equally reached preferable light mixing effect in lesser light mixing distance, finally making
System bulk be can be made smaller.Loss of weight, the effect for subtracting volume can be effectively applicable to automobile product, microlens array structure
211 can also be atomization face structure or frosting structure.
In the present embodiment, the radius of curvature of single concavees lens unit is 0.5~15mm in microlens array structure 211,
In microlens array structure 211 spacing of two neighboring concavees lens unit be 1~5mm, can effectively shorten light light mixing away from
From the even light effect of raising brightness and coloration.
In the present embodiment, the first fully reflecting surface 231 with the second fully reflecting surface 241 is the broken face structure being connected or smooth
The mean obliquity of continuous surface structure, the first fully reflecting surface 231 and the second fully reflecting surface 241 is 30~60 degree, can effectively really
Save the light collecting effect of reflecting surface structure from damage.
In the present embodiment, as shown in Fig. 2, light collecting lens unit 22 further includes in bowl-shape middle part lens 25, middle part is saturating
Mirror 25 is set between outer lens 23 and interior len 24, and middle part lens 25 are set in the first groove 232, the large radius of middle part lens 25
Light-emitting surface is arranged close to the bottom of the first groove 232, and middle part lens 25 are equipped with third fully reflecting surface 251 far from the outer wall in axle center,
The third groove 252 being recessed to even optical lens 21 is equipped at the minor radius incidence surface center of middle part lens 25, interior len 24 is set to
In third groove 252, the large radius light-emitting surface of interior len 24 is arranged close to the bottom of third groove 252.Light collecting lens list is set
Member 22 is the Fresnel lens structure with three layers of gradient, can effectively reduce the thickness of light collecting lens unit 22, so as to
The whole volume and weight for effectively reducing head-up display device back light system, meet instantly market to the need of light and thin type product
It asks.
Based on the above embodiment, middle part lens 25 are equipped with k, and k is the integer greater than 1, the thickness of middle part lens 25 and half
Diameter is respectively PkAnd Qk, D > Pk> d, R > Qk> r, with PkAnd QkThe sequence successively decreased from outside to inside is successively arranged each middle part lens 25,
I.e. small PkAnd QkMiddle part lens 25 are set to big PkAnd QkIn the third groove 252 of middle part lens 25, interior len 24, which is set to, to be possessed
PkminAnd QkminMiddle part lens 25 third groove 252 in, possess PkmaxAnd QkmaxMiddle part lens 25 be set to the first groove
In 232.The Fresnel lens structure that light collecting lens unit 22 is multi-gradient is set, it can be according to the demand of application through one
The thickness of portion's reduction light collecting lens unit 22.
In the present embodiment, optical diaphragm 40 is additionally provided between LCD panel 30 and light harvesting component 20, optical diaphragm 40 can be
Brightness enhancement film can effectively improve display brightness, and optical diaphragm 40 can also be diffusion barrier, can effectively improve the uniform effect of light beam
Fruit.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (9)
1. a kind of back light system of head-up display device, including the pcb board (10), light harvesting component (20) and LCD panel set gradually
(30), which is characterized in that the pcb board (10) is equipped with the n light being arranged in array close to the side of the light harvesting component (20)
Source (11), n are the integer greater than 1；
The light harvesting component (20) includes even optical lens (21) and the n light collecting lens units (22) being arranged in array, described even
The light-emitting surface of optical lens (21) is equipped with microlens array structure (211), and the light collecting lens unit (22) is located at close to described even
The incidence surface side of optical lens (21)；
The light collecting lens unit (22) includes in bowl-shape outer lens (23) and in bowl-shape interior len (24), the outer lens
(23) thickness and radius is respectively D and R, and the thickness and radius of the interior len (24) are respectively d and r, and D > d, R > r are described
Outer lens (23) are equipped with the first fully reflecting surface (231) far from the outer wall in axle center, are equipped at outer lens (23) the incidence surface center
The first groove (232) being recessed to the even optical lens (21), the interior len (24) are set in first groove (232),
The interior len (24) is equipped with the second fully reflecting surface (241) far from the outer wall in axle center, at interior len (24) the incidence surface center
Equipped with the second groove (242) being recessed to the even optical lens (21), the bottom of second groove (242) is reflected equipped with center
Face (243), the light source (11) are located at the center of first groove (232).
2. a kind of back light system of head-up display device according to claim 1, which is characterized in that the microlens array
Structure (211) is the fly eye lens array of concavees lens.
3. a kind of back light system of head-up display device according to claim 2, which is characterized in that the microlens array
The radius of curvature of single concavees lens unit is 0.5~15mm in structure (211).
4. a kind of back light system of head-up display device according to claim 2, which is characterized in that the microlens array
The spacing of two neighboring concavees lens unit is 1~5mm in structure (211).
5. a kind of back light system of head-up display device according to claim 1, which is characterized in that first total reflection
Face (231) and second fully reflecting surface (241) are broken face structure or smooth continuous surface structure.
6. a kind of back light system of head-up display device according to claim 1, which is characterized in that first total reflection
The mean obliquity of face (231) and second fully reflecting surface (241) is 30~60 degree.
7. a kind of back light system of head-up display device according to claim 1, which is characterized in that the light collecting lens list
First (22) further include in bowl-shape middle part lens (25), and the middle part lens (25) are set to the outer lens (23) and described interior
Between mirror (24), the middle part lens (25) are set in first groove (232), and the middle part lens (25) are far from axle center
Outer wall is equipped with third fully reflecting surface (251), is equipped at middle part lens (25) the incidence surface center to the even optical lens (21)
The third groove (252) of recess, the interior len (24) are set in the third groove (252).
8. a kind of back light system of head-up display device according to claim 7, which is characterized in that the middle part lens
(25) k are equipped with, k is the integer greater than 1, and the thickness and radius of the middle part lens (25) are respectively PkAnd Qk, D > Pk> d, R >
Qk> r, with PkAnd QkSuccessively decrease from outside to inside and be arranged each middle part lens (25), the interior len (24), which is set to, possesses PkminWith
QkminThe middle part lens (25) the third groove (252) in, possess PkmaxAnd QkmaxThe middle part lens (25) set
In first groove (232).
9. a kind of back light system of head-up display device according to claim 1, which is characterized in that the LCD panel (30)
Optical diaphragm (40) are additionally provided between the light harvesting component (20).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821246692.8U CN208477268U (en) | 2018-08-03 | 2018-08-03 | A kind of back light system of head-up display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821246692.8U CN208477268U (en) | 2018-08-03 | 2018-08-03 | A kind of back light system of head-up display device |
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| CN208477268U true CN208477268U (en) | 2019-02-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115220233A (en) * | 2022-07-28 | 2022-10-21 | 浙江炽云科技有限公司 | HUD backlight system, design method, head-up display system and vehicle |
-
2018
- 2018-08-03 CN CN201821246692.8U patent/CN208477268U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115220233A (en) * | 2022-07-28 | 2022-10-21 | 浙江炽云科技有限公司 | HUD backlight system, design method, head-up display system and vehicle |
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