CN108919496A - The low-power consumption HUD system of solar radiation protection - Google Patents
The low-power consumption HUD system of solar radiation protection Download PDFInfo
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- CN108919496A CN108919496A CN201810897527.7A CN201810897527A CN108919496A CN 108919496 A CN108919496 A CN 108919496A CN 201810897527 A CN201810897527 A CN 201810897527A CN 108919496 A CN108919496 A CN 108919496A
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- 238000003384 imaging method Methods 0.000 claims abstract description 31
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 230000033228 biological regulation Effects 0.000 claims abstract description 17
- 239000004973 liquid crystal related substance Substances 0.000 claims description 61
- 239000012528 membrane Substances 0.000 claims description 15
- 238000005516 engineering process Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 210000002858 crystal cell Anatomy 0.000 claims description 2
- 238000005374 membrane filtration Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
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- KLDZYURQCUYZBL-UHFFFAOYSA-N 2-[3-[(2-hydroxyphenyl)methylideneamino]propyliminomethyl]phenol Chemical compound OC1=CC=CC=C1C=NCCCN=CC1=CC=CC=C1O KLDZYURQCUYZBL-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/001—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles integrated in the windows, e.g. Fresnel lenses
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133548—Wire-grid polarisers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention relates to a kind of low-power consumption HUD systems of solar radiation protection, regulate and control film including HUD imaging device and the light being arranged in projected area；The HUD imaging device regulates and controls film for information to be shown will to be needed to project the light by pre-set optical path；The light regulation membrane filtration is except the infrared ray in sunlight, to reduce the heat in the HUD imaging device.Visible light is transmitted in the present embodiment, it is ensured that show the brightness of information, and then improve the contrast of display information and external sights, driver is facilitated to watch.Visible light and ultraviolet light are transmitted in the present embodiment, HUD system can be made to be converted to the thermoradiation efficiency for bearing visible light from the thermoradiation efficiency for bearing sunlight (the thermoradiation efficiency accounting of ultraviolet light is small to be ignored), i.e. the present embodiment greatly reduces influence of the thermoradiation efficiency to HUD system, it is conducive to extend the service life of HUD system, improves the experience that driver uses HUD system.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of low-power consumption HUD systems of solar radiation protection.
Background technique
Currently, automobile new line display technology (HUD) utilizes the principle of optical reflection, by information projections such as speed and navigation
Immediately ahead of to driver, extraneous scene and HUD is set to show that information combines together, such driver is in driving procedure without low
Head is i.e. it can be seen that the extraneous information such as scene and speed.
Since HUD system is needed information projection in extraneous environment, make the imaging effect of HUD system will be by the external world
The influence of environment light causes user that can not see the display information of HUD system clearly especially when ambient is stronger.To solve
The problem, HUD system can adjust its brightness for showing information based on ambient intensity in the related technology, to improve aobvious
Show the brightness of information.During increasing brightness, the heat that display unit generates in HUD system is also accordingly increased.In addition,
With the increase of the field angle FOV of HUD system, part sunlight can be by showing that the optical path of information reaches the display of HUD system
Unit concentrates heat in HUD system display unit further, leads to display unit thermal damage and shows abnormal even damage nothing
Method is shown, is unfavorable for the use of HUD system.
Summary of the invention
The present invention provides a kind of low-power consumption HUD system of solar radiation protection, to solve in the related technology because introducing ambient light
To cause when adjusting the brightness of display information, the display unit of HUD system overheats line intensity and sunlight backlight road reaches and shows
The problem of showing that unit causes display unit heat further to be concentrated and causing thermal damage or damage.
In a first aspect, the embodiment of the invention provides a kind of low-power consumption HUD system of solar radiation protection, including HUD imaging
Equipment and the light being arranged in projected area regulate and control film；
The HUD imaging device will be for that will need information to be shown to project the light tune by pre-set optical path
It controls on film；
The light regulation film is used to filter out the infrared ray in sunlight, to reduce the heat in the HUD imaging device.
Optionally, the light regulates and controls the light modulation film that film includes transparent membrane and is arranged on the transparent membrane；It is described
Moth ocular structure unit is provided on light modulation film；The size of the moth ocular structure unit is greater than visible wavelength and is less than infrared wave
It is long.
Optionally, the moth ocular structure unit includes the different multilayer refracting layer of refractive index；For any two layers of refracting layer,
It is greater than the refractive index of the refracting layer far from the transparent membrane close to the refractive index of the refracting layer of the transparent membrane.
Optionally, the light modulation film is produced on the transparent membrane via millimicro printing technology.
Optionally, the HUD imaging device includes image source, controller and light intensity detector；
The light intensity detector is sent to the control for detecting the light intensity for being incident on light in the HUD system
Device；
Light intensity and pre-set Intensity threshold of the controller for comparison detection, and institute is adjusted according to comparison result
State the backlight state of liquid crystal display in image source.
Optionally, the liquid crystal display includes wiregrating polaroid and 1/2 phase retardation film；The wherein wiregrating polaroid
It is arranged between polarizing film and liquid crystal cell；1/2 phase retardation film is arranged between the polarizing film and the down polaroid.
Optionally, when the comparison result indicates that the light intensity is more than or equal to the Intensity threshold, the control
Device is used to for the backlight state adjustment of the liquid crystal display being in off state or semi-open state；In the comparison result table
When showing that the light intensity is less than the Intensity threshold, the controller is used to the backlight state of the liquid crystal display being adjusted to complete
Open state.
Optionally, the HUD imaging device further includes optical mirror；The optical mirror is by reflection and/or refracting element
It constitutes, the light for the liquid crystal display to be emitted is projected to the light regulation film.
Optionally, the HUD imaging device further includes cabinet；The light intensity detector is fixed on the side of the box house
On wall.
Second aspect, the embodiment of the invention provides a kind of low-power consumption HUD systems of solar radiation protection, including HUD to be imaged
Equipment；The HUD imaging device includes image source, controller and light intensity detector；
The light intensity detector is sent to the control for detecting the light intensity for being incident on light in the HUD system
Device；
Light intensity and pre-set Intensity threshold of the controller for comparison detection, and institute is adjusted according to comparison result
State the backlight state of liquid crystal display in image source.
As it can be seen that light regulation membrane filtration removes infrared ray and transmits visible light in the present embodiment, it is ensured that show the bright of information
Degree, and then the contrast of information and external sights is improved, facilitate driver to watch.Simultaneously as solar energy spectrum energy is main
It is made of ultraviolet light (accounting for 3%), visible light (accounting for 42%) and infrared ray (accounting for 55%) three parts, therefore passes through light in the present embodiment
Line regulation film filters out infrared ray, and transmits visible light and ultraviolet light, and HUD system can be made from the heat radiation for bearing sunlight
Effect is converted to the thermoradiation efficiency (the thermoradiation efficiency accounting of ultraviolet light is small to be ignored) for bearing visible light, i.e. the present embodiment
Influence of the thermoradiation efficiency to HUD system is greatly reduced, the service life of HUD system is conducive to extend, improves driver
Use the experience of HUD system.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is a kind of block diagram of the low-power consumption HUD system of solar radiation protection shown in the embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of light regulation film shown in the embodiment of the present invention；
Fig. 3 is the schematic illustration for regulating and controlling film filtering light；
Fig. 4 is the structural schematic diagram of moth ocular structure unit 133；
Fig. 5 is the block diagram of the low-power consumption HUD system of another solar radiation protection shown in the embodiment of the present invention；
Fig. 6 is structural schematic diagram of the liquid crystal display under backlight open state in HUD system shown in Fig. 5；
Fig. 7 is structural schematic diagram of the liquid crystal display under backlight closed state in HUD system shown in Fig. 5；
Fig. 8 is the block diagram of the low-power consumption HUD system of another solar radiation protection shown in the embodiment of the present invention.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
When ambient is stronger, existing HUD system can show the brightness of information by improving HUD system, to improve
Show the contrast of information and extraneous scene, while the heat that display unit generates in HUD system also accordingly increases.In addition,
With the increase of the field angle FOV of HUD system, part sunlight can be by showing that the optical path of information reaches the display of HUD system
Unit concentrates heat in HUD system display unit further, leads to display unit thermal damage and shows abnormal even damage nothing
Method is shown, is unfavorable for the use of HUD system.
To solve the above problems, the embodiment of the invention provides a kind of low-power consumption HUD system of solar radiation protection, Fig. 1 is
A kind of block diagram of the low-power consumption HUD system of solar radiation protection shown in the embodiment of the present invention.Referring to Fig. 1, a kind of solar radiation protection
Low-power consumption HUD system, including：HUD imaging device 11 and the light being arranged in projected area 12 regulate and control film 13.Wherein,
HUD imaging device 11 regulates and controls film 13 for information to be shown will to be needed to project light by pre-set optical path
On；
Light regulation film 13 is used to filter out the infrared ray in sunlight, to reduce the heat in the HUD imaging device.
It should be noted that the windshield in front can be set in projected area when HUD system is applied on automobile
On.Technical staff can be configured according to concrete scene, be not limited thereto.
It will be appreciated that light regulation film 13 can in transmission since the wavelength of ultraviolet light is less than the wavelength of visible light
Also transmitting UV while light-exposed, but due to the heat radiation of ultraviolet light account for it is smaller, in the description of subsequent embodiment not
The influence of the ultraviolet light is emphasized again.
It mainly include three parts in view of solar energy spectral power distribution：Ultraviolet light accounts for 3%, visible light and accounts for 42% and infrared ray
55% is accounted for, the infrared part filtered out in sunlight is used in the embodiment of the present invention, transmits visible light and ultraviolet light, make HUD
(the purple of thermoradiation efficiency 42% for bearing visible light is converted in imaging device from the thermoradiation efficiency (100%) for bearing sunlight
The thermoradiation efficiency accounting 3% of outside line can be ignored), it can achieve the effect for reducing sunlight heat radiation.Referring to fig. 2, one
In embodiment, light regulates and controls the light modulation film 132 that film 13 may include transparent membrane 131 and be arranged on transparent membrane 131.Its
In, several moth ocular structure units 133 are provided on light modulation film 132.When being mapped to moth ocular structure unit 133 due to solar irradiation, only
It is greater than the transmitted light and zero order light reflected of 133 size of moth ocular structure unit with the presence of wavelength, therefore is arranged in the present embodiment each
The size of moth ocular structure unit 133 is greater than visible wavelength and is less than IR wavelength, to guarantee that light regulation film 13 filters out
Infrared ray and transmit visible light and ultraviolet light.
In view of the wave-length coverage of infrared ray is between 1 millimeter~770 nanometers, therefore light modulation film 132 can in the present embodiment
To be produced on transparent membrane 132 using millimicro printing technology.The production method of moth ocular structure unit 133 can in the present embodiment
To refer to the relevant technologies, it is not limited thereto.
In one embodiment, moth ocular structure unit 133 may include the different multilayer refracting layer of refractive index, Fig. 3 and Fig. 4 institute
Show and contain 8 layers of refracting layer in moth ocular structure unit, mark is respectively n1~n8.For the complete mistake of light for guaranteeing corresponding wave band
Filter, with continued reference to Fig. 3 and Fig. 4, in moth ocular structure unit 133 for any two layers of refracting layer, close to transparent membrane 131
The refractive index of refracting layer is greater than the refractive index of the refracting layer far from transparent membrane 131.In other words, mark n1 is corresponding to mark n8
The refractive index of refracting layer successively increases.
So far, can to filter out spectral energy accounting in sunlight higher infrared for light regulation film 13 in the present embodiment
Line, so that reducing through the energy of the light (transmission visible light and ultraviolet light) of optical path arrival HUD system display unit (is original
45%), influence of the thermoradiation efficiency to HUD system can be reduced, be conducive to extend the service life of HUD system.Meanwhile this
In embodiment, light regulates and controls film and transmits visible light, it is ensured that shows the brightness of information, and then improves display information and external scape
The contrast of elephant, facilitates driver to watch, and improves the experience that driver uses HUD system.
Fig. 5 is a kind of block diagram of the low-power consumption HUD system of solar radiation protection shown in the embodiment of the present invention.Referring to Fig. 5, one
The low-power consumption HUD system of kind solar radiation protection, including：HUD imaging device 11.Wherein, HUD imaging device 11 includes image source
111, controller (not shown) and light intensity control 114.Wherein,
Light intensity detector 114 is sent to controller for detecting the light intensity for being incident on light in HUD system；
Light intensity and pre-set Intensity threshold of the controller for comparison detection, and image source is adjusted according to comparison result
The backlight state of liquid crystal display in 111.
In the present embodiment, image source 111 may include liquid crystal display, and Fig. 6 is liquid crystal display in HUD system shown in Fig. 5
Structural schematic diagram of the device under backlight open state, Fig. 7 be in HUD system shown in Fig. 5 liquid crystal display in backlight closed state
Under structural schematic diagram.
Liquid crystal display may include the portions such as down polaroid, polarizing film, liquid crystal, ITO and upper polaroid in the related technology
Part only shows in the present embodiment to simplify its structure and propagates related part with light, other section components, example is omitted
Such as TFT substrate.Referring to Fig. 6 and Fig. 7, on the basis of available liquid crystal display, liquid crystal display can be in the present embodiment
Including 1/2 phase retardation film and wiregrating polaroid.Wherein 1/2 phase retardation film can be set down polaroid and polarizing film it
Between, for incident ray (in the plane of normally incident direction) to be rotated by 90 °.Wiregrating polaroid is arranged in polarizing film and liquid
Between brilliant box, and wiregrating polaroid has the property that：If incident ray (fluctuation direction) is parallel with its reference direction,
Transmit the incident ray；If incident ray (fluctuation direction) is vertical with its reference direction, the incident ray is reflected.
With continued reference to Fig. 6, when the backlight state of liquid crystal display is open state, backlight issues natural light, passes through
Down polaroid filters out the light in fluctuation direction normal to screen (or paper) direction.The incident ray of 1/2 phase retardation film
For the emergent ray of down polaroid, polarizing film is emitted to after 90 degree of rotations.The polarization direction of polarizing film and down polaroid
Polarization direction is vertical, and such polarizer filter falls some light in incident ray, only allows incidence identical with its polarization direction
Light passes through.Since the reference direction of wiregrating polaroid and the polarization direction of polarizing film are identical (each parallel to screen or paper
Face), therefore, wiregrating polaroid can transmit incident ray, and the light of transmission is emitted by the rotation of liquid crystal from upper polaroid.This
Sample, liquid crystal display are in transmission mode, and the effect of transmission backlight may be implemented.
With continued reference to Fig. 7, when the backlight state of liquid crystal display is in off state, backlight is closed or portion separates
It opens.By taking backlight is all closed as an example, it is seen that light is incident to liquid crystal display by optical path, and then upper polaroid filters out visible
The light of screen or paper is parallel in light.Light is emitted to wiregrating polaroid by the rotation of liquid crystal.Due to wiregrating polaroid
Reference direction be parallel to screen or paper, incident ray can be reflected.Light meeting backtracking after reflection, finally will letter
Breath is presented to driver.In this way, liquid crystal display is in reflective-mode, the effect of sunlight reflection may be implemented.
In one embodiment, controller can adjust its backlight state according to the light intensity of detection, may include：
State 1, if the backlight state of liquid crystal display is open state, liquid crystal display is in transmission mode at this time, back
Light source issue light successively pass through down polaroid, 1/2 phase retardation film, polarizing film, wiregrating polaroid, liquid crystal, ITO layer and on
Then polaroid reaches light by optical path and regulates and controls film, information is finally presented to driver.
Indicate that light intensity is more than or equal to light intensity in the comparison result of light intensity and Intensity threshold that light intensity control 114 detects
When threshold value, if the backlight of liquid crystal display is kept to continue starting, the brightness of information can be made higher, and electric energy can be wasted,
The adjustment of the backlight state of liquid crystal display is in off state or semi-open state by controller in the present embodiment thus.
For example, controller can all be closed with backlight, so that liquid crystal display adjustment is in off state.For another example control
Device processed can close part backlight, and remaining backlight is opened, and the brightness and light intensity of backlight can be reduced in this way, thus by liquid
Crystal display is adjusted to semi-open state, reduces brightness and light intensity that liquid crystal display transmits light.
State 2, if the backlight state of liquid crystal display is in off state, liquid crystal display is in reflective-mode, light at this time
The visible light that line regulation film transmits successively reaches wiregrating polaroid by upper polaroid, ITO, liquid crystal, by line after optical path
Backtracking after the reflection of grid polaroid.Later, light is reached by optical path and regulates and controls film, information is finally presented to driver.
When the comparison result of light intensity and Intensity threshold that light intensity control 114 detects indicates that light intensity is less than Intensity threshold,
If the backlight of liquid crystal display is kept to continue to close, shows that the brightness of information is lower, influence the viewing of driver, thus
The backlight state of liquid crystal display is adjusted to open state by controller in the present embodiment, i.e. controller can open whole backlights
Source can also adjust the power of each backlight, to adjust the backlight and/or light intensity of liquid crystal display, and then enhance liquid crystal display
Device transmits the brightness and/or light intensity of light, and driver is facilitated to watch.
It should be noted that two backlight states in the present embodiment only with liquid crystal display describe the work of controller
Principle, certainly, technical staff can divide more backlight states according to concrete scene, for example, closing whole backlights, closing
1/4 backlight, 2/4 backlight of closing, 3/4 backlight of closing, the whole backlights of unlatching etc., can be combined with adjustment member backlight
The power adjustment light intensity in source etc., equally may be implemented the scheme of the application, and corresponding scheme also falls into the protection scope of the application.
In some scenes, sunlight is incident on the difference of the region in HUD system, some regional luminances of liquid crystal display are high, some areas
Domain brightness is low, and controller can individually adjust each region backlight state, to make liquid crystal display according to the brightness in each region at this time
The brightness of device tends to be identical, and the scheme of the application equally may be implemented.
With continued reference to Fig. 5, HUD imaging device 11 further includes optical mirror.Wherein optical mirror can by reflecting element and/
Or refracting element is constituted, and is used to form the optical path between image source 111 and windshield to be emitted the liquid crystal display
Light (comprising needing information to be shown) is projected to windshield.For example, reflecting element can be plane mirror 114, refraction
Element can be free-form surface mirror 115, and technical staff can select suitable optical mirror according to concrete scene, adjust light
The scheme of the application equally may be implemented in the light path on road and direction.
With continued reference to Fig. 5, HUD imaging device further includes cabinet 115.Light intensity detector 114 is fixed on inside cabinet 115
On side wall.Light intensity detector 114 can detect the emergent ray and/or incident ray of the upper cover plate of cabinet 115 in this way
Light intensity, and the light intensity of detection is sent to controller.Controller can be according to the light intensity and pre-set light intensity of incident ray
The backlight state of adjusting thresholds liquid crystal display, referring to Fig. 6 and Fig. 7 and corresponding content, details are not described herein.In addition, this
In embodiment, the inside of cabinet 115 is arranged in light intensity control 114, can influence to avoid extraneous light to detection result, from
And promote the accuracy of detection result.
It should be noted that controller can use one or more application specific integrated circuit in the present embodiment
(ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), scene can
Gate array (FPGA), microprocessor or other electronic components are programmed to realize.Certain controller can also use software realization.Technology
Personnel can select according to concrete scene, be not limited thereto.
So far, increase wiregrating polaroid and 1/2 phase delay in the present embodiment by adjusting the structure of liquid crystal display
Film can emphasize the backlight state of whole liquid crystal display according to ambient light, and liquid crystal display is allow to work in transmission mode, instead
Emission mode and half-transmitting and half-reflecting mode achieve the purpose that dynamic adjusts liquid crystal display power consumption, while reducing liquid crystal
Show the heat that device generates.
Fig. 8 is the block diagram of the low-power consumption HUD system of another solar radiation protection shown in the embodiment of the present invention.Referring to Fig. 8,
A kind of low-power consumption HUD system of solar radiation protection, including：HUD imaging device 11 and the light being arranged in projected area regulate and control
Film 13.Wherein, HUD imaging device 11 regulates and controls film for information to be shown will to be needed to project light by pre-set optical path
On；Light regulation film is for filtering out infrared ray and transmiting visible light and ultraviolet light, to improve the brightness of its displayed information.
Wherein, the working principle and structure phase of HUD imaging device 11 and HUD imaging device in Fig. 5~embodiment illustrated in fig. 7
Together.Also, it is identical as the working principle and structure of light regulation film in FIG. 1 to FIG. 4 illustrated embodiment that light regulates and controls film 13.Specifically
Content please refers to FIG. 1 to FIG. 7 and corresponding content, and details are not described herein.
So far, increase wiregrating polaroid and 1/2 phase delay in the present embodiment by adjusting the structure of liquid crystal display
Film can emphasize the backlight state of whole liquid crystal display according to ambient light, and liquid crystal display is allow to work in transmission mode, instead
Emission mode and half-transmitting and half-reflecting mode achieve the purpose that dynamic adjusts liquid crystal display power consumption, while reducing liquid crystal
Show the heat that device generates.In addition, light regulation film 13 can filter out in sunlight the higher infrared ray of spectral energy accounting and
Visible light and ultraviolet light are transmitted, so that the energy that the light of HUD system display unit is reached by optical path is reduced, it can be further
Influence of the thermoradiation efficiency to HUD system is reduced, the service life of HUD system is conducive to extend.
It will be appreciated that in the description of above method embodiment between the structure of electronic equipment and each device
Function is described in detail, and with specific reference to corresponding content, details are not described herein.
In the present invention, term " first ", " second " are used for description purposes only, and are not understood to indicate or imply opposite
Importance.Term " multiple " refers to two or more, unless otherwise restricted clearly.
Those skilled in the art are considering specification and after practicing disclosure disclosed herein, will readily occur to of the invention its
Its embodiment.The present invention is directed to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (10)
1. a kind of low-power consumption HUD system of solar radiation protection, which is characterized in that including HUD imaging device and be arranged in projection area
Light in domain regulates and controls film；
The HUD imaging device regulates and controls film for information to be shown will to be needed to project the light by pre-set optical path
On；
The light regulation film is used to filter out the infrared ray in sunlight, to reduce the heat in the HUD imaging device.
2. low-power consumption HUD system according to claim 1, which is characterized in that the light regulation film includes transparent membrane
With the light modulation film being arranged on the transparent membrane；Moth ocular structure unit is provided on the light modulation film；The moth ocular structure list
The size of member is greater than visible wavelength and is less than IR wavelength.
3. low-power consumption HUD system according to claim 2, which is characterized in that the moth ocular structure unit includes refractive index
Different multilayer refracting layers；For any two layers of refracting layer, it is greater than close to the refractive index of the refracting layer of the transparent membrane separate
The refractive index of the refracting layer of the transparent membrane.
4. low-power consumption HUD system according to claim 2, which is characterized in that the light modulation film is via millimicro printing technology
It is produced on the transparent membrane.
5. low-power consumption HUD system according to claim 2, which is characterized in that the HUD imaging device include image source,
Controller and light intensity detector；
The light intensity detector is sent to the controller for detecting the light intensity for being incident on light in the HUD system；
Light intensity and pre-set Intensity threshold of the controller for comparison detection, and the figure is adjusted according to comparison result
The backlight state of liquid crystal display in image source.
6. low-power consumption HUD system according to claim 5, which is characterized in that the liquid crystal display includes wiregrating polarisation
Piece and 1/2 phase retardation film；Wherein the wiregrating polaroid is arranged between polarizing film and liquid crystal cell；1/2 phase delay
Film is arranged between the polarizing film and the down polaroid.
7. low-power consumption HUD system according to claim 5, which is characterized in that indicate the light intensity in the comparison result
When more than or equal to the Intensity threshold, the controller is for the backlight state of the liquid crystal display to be adjusted to close
State or semi-open state；When the comparison result indicates that the light intensity is less than the Intensity threshold, the controller is used
In the backlight state of the liquid crystal display is adjusted to full open state.
8. low-power consumption HUD system according to claim 5, which is characterized in that the HUD imaging device further includes optical frames
Body；The optical mirror is made of reflection and/or refracting element, and the light for the liquid crystal display to be emitted is projected to institute
State light regulation film.
9. low-power consumption HUD system according to claim 5, which is characterized in that the HUD imaging device further includes cabinet；
The light intensity detector is fixed on the side wall of the box house.
10. a kind of low-power consumption HUD system of solar radiation protection, which is characterized in that including HUD imaging device；The HUD imaging is set
Standby includes image source, controller and light intensity detector；
The light intensity detector is sent to the controller for detecting the light intensity for being incident on light in the HUD system；
Light intensity and pre-set Intensity threshold of the controller for comparison detection, and the figure is adjusted according to comparison result
The backlight state of liquid crystal display in image source.
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| CN201810897527.7A CN108919496A (en) | 2018-08-08 | 2018-08-08 | The low-power consumption HUD system of solar radiation protection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810897527.7A CN108919496A (en) | 2018-08-08 | 2018-08-08 | The low-power consumption HUD system of solar radiation protection |
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| CN108919496A true CN108919496A (en) | 2018-11-30 |
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| CN201810897527.7A Pending CN108919496A (en) | 2018-08-08 | 2018-08-08 | The low-power consumption HUD system of solar radiation protection |
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| US11988830B2 (en) | 2021-07-16 | 2024-05-21 | Coretronic Corporation | Head up display |
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