CN108594442A - A kind of HUD light path systems reducing TFT sunlights evil - Google Patents
A kind of HUD light path systems reducing TFT sunlights evil Download PDFInfo
- Publication number
- CN108594442A CN108594442A CN201810801493.7A CN201810801493A CN108594442A CN 108594442 A CN108594442 A CN 108594442A CN 201810801493 A CN201810801493 A CN 201810801493A CN 108594442 A CN108594442 A CN 108594442A
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- tft
- light path
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- hud
- speculum
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- 239000012528 membrane Substances 0.000 claims abstract description 14
- 230000032683 aging Effects 0.000 abstract 1
- 238000003483 aging Methods 0.000 abstract 1
- 101100489584 Solanum lycopersicum TFT1 gene Proteins 0.000 description 5
- 230000000739 chaotic effect Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
Abstract
The present invention relates to HUD technical fields, specifically disclose a kind of HUD light path systems of reduction TFT sunlights evil, further include speculum, free-form curved mirror, dustproof membrane and the windshield for constituting transflector light path successively equipped with the TFT for being fixed on emission source exit direction；The speculum is polarization-type speculum and/or the dustproof membrane is polarization-type film；Sunlight enters the TFT along the backlight road of the reflected light path.If the normal mirror in existing HUD light paths is replaced with polarization-type speculum PBS, or existing common dustproof membrane is replaced with into polarization-type film, then the solar energy for eventually entering into TFT is<25.46%.The present invention can significantly weaken the sunlight for eventually entering into TFT, and 40% or so of about existing HUD light paths, slow down TFT quick agings due to sunlight irradiation, to achieve the purpose that protect to TFT.
Description
Technical field
The present invention relates to HUD (to be not particularly illustrated, be windscreen formula HUD) technical field more particularly to a kind of reduction TFT
The HUD light path systems of sunlight evil.
Background technology
HUD (Head Up Display, head up display) is used as a kind of driving assistance system, can be important vehicle
Parameter is shown within the range of visibility of driver, make driver always and can be obtained in the basic visual field with drive it is relevant
Various information.For example, in order to understand current speed information, sight need not be turned to combination instrument by driver again, through driving
HUD display screens observation immediately ahead of member's eyes, can see these information, improve the safety of vehicle drive.
But during the use of HUD, sunlight (can be decomposed into 50% P light and 50% S light) can be along light
Road inversely enters TFT.In typical HUD, positive light path when working normally includes the TFT for accepting emergent light successively,
And the free form surface border of the plane mirror of first reflection and second of transmitting, and for dust-proof dustproof membrane, such as specification
(arrow indicates sunlight and its direction) shown in attached drawing 1.
When sunlight irradiates windshield, the S light (it is assumed herein that being 18%) of windshield reflection 17%~18% remains
Lower 50% P light and 32% S light enter HUD light paths, and the efficiency of common dustproof membrane is about 86%, and the reflection efficiency of plane mirror is
90%, then the solar energy for eventually entering into TFT is 57.1212% (=100%* (100%-18%) * 86%*90%*
90%), a large amount of sunlight enters TFT, and TFT temperature is caused to increase, and the threshold voltage for easily causing TFT changes with deviated stress
Accelerate, cause liquid crystal display panel display chaotic, mobility can be also varied from, and influence resolution ratio, and long-term deviated stress makes device
The threshold value of part is easy to happen drift, and TFT threshold drifts can directly cause pixel that the variation of brightness occurs, influence whole display quality
And service life.
Invention content
The present invention provides a kind of HUD light path systems of reduction TFT sunlights evil, and the technical issues of solution is：Sunlight edge
That HUD light paths inversely enters TFT, and a large amount of sunlight enters TFT, TFT temperature is caused to increase, and easily causes the threshold value of TFT
Voltage changes with deviated stress and accelerates, and causes liquid crystal display panel display chaotic, influences entirety and shows quality.
In order to solve the above technical problems, the present invention provides a kind of HUD light path systems of reduction TFT sunlights evil, is equipped with solid
Be scheduled on the TFT of emission source exit direction, further include constitute successively the speculum of transflector light path, free-form curved mirror, dustproof membrane and
Windshield；
The speculum is polarization-type speculum or the dustproof membrane is polarization-type film；
Sunlight enters the TFT along the backlight road of the reflected light path.
In a preferred embodiment, the polarization-type speculum is PBS (polarization spectro piece, also referred to as polarization spectro rib
Mirror), the light separation or synthesis of wavelength of the same race can be used for.
In another preferred embodiment, the polarization-type speculum be 3M companies CMF (Colding MirrorFilm,
Cold Mirrors film).
Preferably, the polarization-type film is the DBEF-QV2 of 3M companies, is the patented product of 3M companies.
A kind of HUD light path systems reducing TFT sunlights evil provided by the invention, will be common anti-in existing HUD light paths
The CMF that mirror replaces with polarization-type speculum PBS or 3M companies is penetrated, by taking CMF as an example, because of the characteristic of CMF, major part can be filtered
Sunlight, so the solar energy visible light part for eventually entering into TFT is about 25.46%, and infrared part (heat it is real
Source) then it is less than 5%, eventually 30% is about reduced into the solar energy of TFT.Alternatively, existing common dustproof membrane is replaced
It is changed to polarization-type film, by taking the DBEF-QV2 of 3M companies as an example, because of the characteristic of DBEF-QV2, eventually enters into TFT too
Sunlight energy is about reduced to 28.09%.
The present invention can significantly weaken the sunlight for eventually entering into TFT, and the half of about existing HUD light paths is extremely
One third, to carry out effective protection to TFT.
Description of the drawings
Fig. 1 is a kind of light channel structure of the HUD light path systems for reduction TFT sunlights evil that the embodiment of the present invention 1,2 provides
Figure；
Fig. 2 is that the spectrum of CMF in the HUD light path systems that a kind of reduction TFT sunlights that the embodiment of the present invention 1 provides are done harm to is bent
Line chart；
Fig. 3 is DBEF-QV2 in the HUD light path systems that a kind of reduction TFT sunlights that the embodiment of the present invention 2 provides are done harm to
Spectral curve.
Specific implementation mode
Embodiments of the present invention are specifically illustrated below in conjunction with the accompanying drawings, embodiment is only given for illustrative purposes,
It can not be interpreted as limitation of the invention, including attached drawing is only for reference and illustrates to use, and does not constitute to patent protection of the present invention
The limitation of range can carry out many changes because on the basis of not departing from spirit and scope of the invention to the present invention.
Embodiment 1
A kind of light channel structure figure of the HUD light path systems for reduction TFT sunlights evil that the embodiment of the present invention 1 provides, such as Fig. 1
It is shown, further include the speculum 2 for constituting transflector light path successively, freely bent equipped with the TFT1 for being fixed on emission source exit direction
Face mirror 3, dustproof membrane 4 and windshield 5；
In the present embodiment, the speculum 2 is polarization-type speculum such as PBS, and the dustproof membrane 4 is common dustproof membrane 4.
Optionally, sunlight enters the TFT along the backlight road of the reflected light path, by taking CMF as an example, as shown in Fig. 2,
Wherein：Abscissa represents the wavelength of light, and 420nm~680nm is visible light part, is infrared part more than 680nm；Ordinate generation
Table light transmittance；1. line represents P light, 2. line represents S light.As can be seen from Figure 2, it is seen that the S light almost all of light part (is penetrated by reflection
Curve is low, close to zero), it is seen that close to half, (S light is all reflected light Partial filtration, continues to propagate in the optical path, is left P light
Through CMF eyeglasses, structure can be increased and sponged), the transmitance of infrared part natural light (P light+S light) is up to 95%.
Because CMF can filter half sunlight, the solar energy visible light part for eventually entering into TFT is
25.46% (=32%*86%*90%*95%+50%*86%*90%*5%), luminous energy is reduced to original 40%=
25.46%/63.468%.It is up to 95% in the transmitance of infrared part, natural light, and eventually enters into the solar energy of TFT1
It is 5%=1-95% that infrared part, which enters light path, can effectively be protected to TFT.
Embodiment 2
A kind of light channel structure figure of the HUD light path systems for reduction TFT sunlights evil that the embodiment of the present invention 2 provides, again
Referring to Fig. 1, the present embodiment difference from example 1 is that：The speculum 2 is normal mirror, and the dustproof membrane 4 is
The DBEF-QV2 of polarization-type film such as 3M companies.
DBEF-QV2 spectral curves as shown in Figure 2, wherein：Abscissa represents the wavelength of light, and 420nm~680nm is
Visible light part is infrared part more than 680nm；Left ordinate represents solar energy, and right ordinate represents light transmittance；Line
3., 4. represent sunlight H103 resin, 5. line represents the curve of spectrum.It 3. can be seen that visible light part and infrared part light by line
Line penetrate about 90%, reflected light about 10%, by line 4. it can be seen from visible light part almost all reflection, reflectivity ＞ 85%,
Through about 15%, near infrared light reflects about 50%.
The application sets light transmission direction to light path S light directions in the optical path, can sunlight be filtered half.
In conclusion sunlight enters the TFT1 along the backlight road of the reflected light path, because of the work of DBEF-QV2
With the solar energy for eventually entering into TFT1 is 28.09%【=90%* (32%*90%+50%*15%)】, luminous energy reduction
To original 44%=28.09%/63.468%.
The embodiment of the present invention can significantly weaken the sunlight for eventually entering into TFT1, and the two of about existing HUD light paths
/ mono-, to one third, improves the whole of TFT and shows quality and service life.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (5)
1. a kind of HUD light path systems reducing TFT sunlights evil, equipped with the TFT for being fixed on emission source exit direction, feature exists
In, further include successively constitute transflector light path speculum, free-form curved mirror, dustproof membrane and windshield；
The speculum is polarization-type speculum and/or the dustproof membrane is polarization-type film；
Sunlight enters the TFT along the backlight road of the reflected light path.
2. a kind of HUD light path systems reducing TFT sunlights evil as described in claim 1, it is characterised in that：The polarization-type
Speculum is PBS.
3. a kind of HUD light path systems reducing TFT sunlights evil as described in claim 1, it is characterised in that：The polarization-type
Speculum is the CMF of 3M companies.
4. a kind of HUD light path systems reducing TFT sunlights evil as described in claim 1, it is characterised in that：The polarization-type
Film is the DBEF of 3M companies.
5. a kind of HUD light path systems reducing TFT sunlights evil as claimed in claim 4, it is characterised in that：The DBEF types
Number be DBEF-QV2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018106302944 | 2018-06-19 | ||
| CN201810630294 | 2018-06-19 |
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| Publication Number | Publication Date |
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| CN108594442A true CN108594442A (en) | 2018-09-28 |
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| CN201810801493.7A Pending CN108594442A (en) | 2018-06-19 | 2018-07-20 | A kind of HUD light path systems reducing TFT sunlights evil |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870813A (en) * | 2019-03-18 | 2019-06-11 | 惠州市华阳多媒体电子有限公司 | A kind of AR-HUD light path system using PBS polarization spectro piece |
| CN109946841A (en) * | 2019-03-18 | 2019-06-28 | 惠州市华阳多媒体电子有限公司 | A kind of AR-HUD light path system based on polarization spectro |
| CN110031977A (en) * | 2019-03-18 | 2019-07-19 | 惠州市华阳多媒体电子有限公司 | A kind of Double-Screen Display System based on polarization spectro |
| CN110908124A (en) * | 2019-12-23 | 2020-03-24 | 浙江水晶光电科技股份有限公司 | HUD light path system, control method thereof and HUD display device |
| CN114236838A (en) * | 2021-12-15 | 2022-03-25 | 浙江水晶光电科技股份有限公司 | HUD light path system and new line display device |
| WO2022229795A1 (en) * | 2021-04-30 | 2022-11-03 | 3M Innovative Properties Company | Improved compact heads up display |
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| US20040008412A1 (en) * | 2002-05-22 | 2004-01-15 | Yingqlu Jiang | Real image configuration for a high efficiency heads-up display (HUD) using a polarizing mirror and a polarization preserving screen |
| CN1732404A (en) * | 2002-12-31 | 2006-02-08 | 3M创新有限公司 | Head-up display with polarized light source and wide-angle P-polarization reflective polarizer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870813A (en) * | 2019-03-18 | 2019-06-11 | 惠州市华阳多媒体电子有限公司 | A kind of AR-HUD light path system using PBS polarization spectro piece |
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| CN110908124A (en) * | 2019-12-23 | 2020-03-24 | 浙江水晶光电科技股份有限公司 | HUD light path system, control method thereof and HUD display device |
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