CN102998839A - Head raising displayer - Google Patents
Head raising displayer Download PDFInfo
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- CN102998839A CN102998839A CN 201210528024 CN201210528024A CN102998839A CN 102998839 A CN102998839 A CN 102998839A CN 201210528024 CN201210528024 CN 201210528024 CN 201210528024 A CN201210528024 A CN 201210528024A CN 102998839 A CN102998839 A CN 102998839A
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Abstract
The invention provides a head raising displayer which comprises a backlight module, a first polaroid, a liquid crystal display unit and a second polaroid, wherein the backlight module is used for providing a back light source; the first polaroid is arranged above the backlight module, and an inclined angle between the photo-permeable axis of the first polaroid and the horizontal direction is 45 degrees; the liquid crystal display unit is arranged above the first polaroid and comprises a plurality of pixels, each pixel comprises a plurality of sub-pixels, and each sub-pixel is a rhomboid and is in a non-square structure and comprises a plurality of indium tin oxide stripes; and the second polaroid is arranged above the liquid crystal display unit, and an inclined angle between the photo-permeable axis of the second polaroid and the horizontal direction is 135 degrees. After the head raising displayer is adopted, the photo-permeable axis of the two polaroids above and under the liquid crystal display unit are set to be perpendicular to each other, and the sub-pixels in each pixel are provided with the plurality of ITO stripes, so that the whole polarization shaft is axially rotated into the 45-degree inclination due to the non-square structure and the axial rotation of the sub-pixels, and the phenomenon of the low reflectivity caused by the brewster angle can be improved.
Description
Technical field
The present invention relates to a kind of liquid crystal display, relate in particular to a kind of HUD.
Background technology
In recent years, consider based on traffic safety and driving environment etc., can improve automobile reliability and popularize gradually with the servicing unit of driving visibility.For example, GPS (Global Positioning System, GPS) or HUD (HUD, Head-Up Display) is common automobile-used servicing unit.
Particularly, HUD can be mapped in virtual image on the windshield, to provide such as driving relevant informations such as panel board state and drawn to obtain navigation information.Because the driver need not to bow or rotary head is watched, therefore sight line can be concentrated on the place ahead, be not easy to disperse driver's notice.In the prior art, miscellaneous HUD wherein a kind of for utilizing non-self-emitting display, liquid crystal display (Liquid Crystal Display for example, LCD) come show image, recycling a such as backlight module of light emitting diode matrix is with image projection and reflex to driver's visual line of sight.The known backlight module of this kind is that light source diversity ground is penetrated, so that the passenger beyond the driver all can watch image in all angles.Yet, because the path that each light source penetrates is concentrated, so that single light source exposes to driver's remitted its fury.
On the other hand, when light penetrated optical element (such as spectroscope) surperficial with non-perpendicular angle, transmission and reflection characteristic all depended on polarization phenomena.Under this kind situation, the coordinate system of use is to define with that plane of containing input beam and folded light beam, if the polarization vector of light in this plane, then is called the P polarized light; If polarization vector perpendicular to this plane, then is called the S polarized light.Take HUD as example, because when HUD is shown in windshield with virtual image, the reflectivity of P polarized light is different from the reflectivity of S polarized light, thus, the P polarized light can meet with the low phenomenon of Brewster angle (Brewster angle) caused reflectivity, the S polarized light can run into the driver can't see image with P type polarization type sunglasses problem after reflection, cause looking of HUD to recognize function and reduce.
In view of this, how to design a kind of HUD of novelty, with effectively solve in the existing scheme because P polarized light or the caused defects of S polarized light, be a problem needing to be resolved hurrily of person skilled in the industry.
Summary of the invention
Existing defects when using for HUD of the prior art the invention provides a kind of HUD of novelty.
According to one aspect of the present invention, a kind of HUD is provided, comprising:
One backlight module is for the backlight that described HUD is provided;
One first polaroid is arranged at the top of described backlight module, and the light transmission shaft of described the first polaroid and the angle of horizontal direction are 45 degree;
One liquid crystal display is positioned at the top of described the first polaroid, and described liquid crystal display comprises a plurality of pixels, each pixel has a plurality of sub-pixels, wherein, described sub-pixel is the structure of parallelogram and non-rectangle, and each sub-pixel comprises a plurality of ITO(tin indium oxides) striped; And
One second polaroid is arranged at the top of described liquid crystal display, and described the second polaroid and described the first polaroid are perpendicular, and the light transmission shaft of described the second polaroid and the angle of horizontal direction are 135 degree,
Wherein, described HUD had both had the P polarized component from the polarized light of described the second polaroid outgoing and had also had the S polarized component, in order to improve the low phenomenon of reflectivity that Brewster angle (Brewster angle) causes.
Among the embodiment therein, liquid crystal display is set to an enhancement mode multizone vertical alignment (AMVA, Advanced Multi-domain Vertical Alignment).Preferably, the ITO striped of sub-pixel is tire tread shape.
Among the embodiment therein, liquid crystal display is set to a ultraphotic angle high-resolution (AHVA, Advanced Hyper Viewing Angle) pattern.
Preferably, sub-pixel comprises a plurality of the first stripeds parallel to each other and a plurality of the second stripeds parallel to each other, and wherein, described the first striped and corresponding the second striped intersect at a point, and described the first striped is mutually vertical with described the second striped.
Among the embodiment therein, the friction matching of sub-pixel (rubbing direction) is vertical direction.For example, the angle of the first striped and horizontal direction is 45 degree, and the angle of described the second striped and horizontal direction is 315 degree.
Among the embodiment therein, the friction matching of sub-pixel (rubbing direction) is horizontal direction.For example, the angle of the first striped and horizontal direction is 135 degree, and the angle of described the second striped and horizontal direction is 225 degree.
Adopt HUD of the present invention, the second polaroid light transmission shaft separately of the first polaroid of liquid crystal display below and liquid crystal display top is set to mutually vertical, and the sub-pixel in each pixel of this liquid crystal display has a plurality of ITO stripeds, thereby utilize the non-rectangle structure of sub-pixel and axial-rotation so that whole polarization axle tilts to changing into 45 degree, therefore, this HUD had both had the P polarized component from the polarized light of the second polaroid outgoing and had also had the S polarized component, thereby improved the low phenomenon of reflectivity that Brewster angle causes.
Description of drawings
The reader will become apparent various aspects of the present invention after the reference accompanying drawing has been read the specific embodiment of the present invention.Wherein,
Fig. 1 illustrates the light path principle figure of a traditional HUD;
Light path principle figure when Fig. 2 illustrates liquid crystal display in traditional HUD and is the AMVA pattern;
Light path principle figure when Fig. 3 illustrates liquid crystal display in traditional HUD and is the AHVA pattern;
The structure that Fig. 4 illustrates according to the HUD of one embodiment of the present invention forms and the light path principle synoptic diagram;
Fig. 5 illustrates the first embodiment of the sub-pixel structure in the HUD of Fig. 4;
Fig. 6 illustrates the second embodiment of the sub-pixel structure in the HUD of Fig. 4; And
Fig. 7 illustrates the 3rd embodiment of the sub-pixel structure in the HUD of Fig. 4.
Embodiment
For technology contents that the application is disclosed is more detailed and complete, can be with reference to accompanying drawing and following various specific embodiments of the present invention, identical mark represents same or analogous assembly in the accompanying drawing.Yet those of ordinary skill in the art should be appreciated that the embodiment that hereinafter provides limits the scope that the present invention is contained.In addition, accompanying drawing only is used for schematically being illustrated, and does not draw according to its life size.
With reference to the accompanying drawings, the embodiment of various aspects of the present invention is described in further detail.
Fig. 1 illustrates the light path principle figure of a traditional HUD.As previously mentioned, Foreupward display apparatus for automobile can be mapped in virtual image on the windshield, to provide such as driving relevant informations such as panel board state and drawn to obtain navigation information.Because the driver need not to bow or rotary head is watched, therefore sight line can be concentrated on the place ahead, be not easy to disperse driver's notice.With reference to Fig. 1, utilize backlight module 10 that the corresponding light P of real scene image is projected to windshield 20.Wherein, light P can be divided into P polarized light P11 and S polarized light P12, and P polarized light P11 is mutually vertical with S polarized light P12.
In Fig. 1, light P is in one side generation transmission and the reflection of windshield 20 near the driver, and the angle between this light P and the normal is θ.Wherein, P polarized light P11 is transmitted through the back side of the reflecting surface of windshield 20.S polarized light P12 reflects at the reflecting surface of windshield 20, and the S polarized light P12 along continuous straight runs after the reflection enters driver's the visual field, and at this moment, the driver looks squarely and can see image or the information that originally was positioned at its below.But, in this HUD system, the P polarized light tends to meet with the low phenomenon of Brewster angle (Brewster angle) caused reflectivity, in addition, S polarized light P12 can run into the driver can't see image with P type polarization type sunglasses problem after reflection, cause to look to recognize the function reduction.
The liquid crystal display that Fig. 2 illustrates in traditional HUD is AMVA(Advanced Multi-domain Vertical Alignment, enhancement mode multizone vertical alignment) light path principle figure during pattern.
With reference to Fig. 2, this HUD system comprises a backlight module 302, lower polaroid 304, quarter-wave plate (QWP, Quarter-Wave Plate) 306, liquid crystal display 308, quarter-wave plate 310 and upper polaroid 312 successively.Wherein, quarter-wave plate 306 is used for linearly polarized light is converted into circularly polarized light, and quarter-wave plate 310 is used for circularly polarized light is converted into linearly polarized light.More specifically, the light of backlight module 302 outgoing comprises P light beam and S light beam, through after the lower polaroid 304, only there is the light beam of horizontal direction to be allowed to see through in the P light beam originally, and only has the light beam of vertical direction to be allowed to see through in the original S light beam.Then, quarter-wave plate 306 is converted into anticlockwise circular P polarized light with the linear P polarized light of horizontal direction, and the linear S polarized light of vertical direction is converted into anticlockwise circular S polarized light.Then, the liquid crystal molecule in the liquid crystal display 308 to the light of incident reflect, reflection and transmission, thereby circular P polarized light is rotated counterclockwise 90 degree, and the dextrorotation of circular S polarized light is turn 90 degrees.Then, quarter-wave plate 310 is converted into circular P polarized light linear P polarized light and circular S polarized light is converted into linear S polarized light.At last, transmission and reflection occur on the surface of windshield 314 in linear P polarized light and linear S polarized light.
As shown in Figure 2, have an angle between the linear P polarized light of upper polaroid 312 outgoing and linear S polarized light and the windshield 314, that is linear P polarized light and linear S polarized light are not to be incident to reflecting surface with the direction perpendicular to windshield 314.Thus, the P polarized light also can meet with the low phenomenon of the caused reflectivity of Brewster angle (Brewsterangle).
The liquid crystal display that Fig. 3 illustrates in traditional HUD is AHVA(Advanced Hyper Viewing Angle, ultraphotic angle high-resolution) light path principle figure during pattern.
With reference to Fig. 3, this HUD system comprises a backlight module 402, lower polaroid 404, liquid crystal display 408 and upper polaroid 412 successively.Particularly, the light of backlight module 402 outgoing comprises P light beam and S light beam, through after the lower polaroid 404, only there is the light beam of horizontal direction to be allowed to see through in the P light beam originally, and only has the light beam of horizontal direction to be allowed to see through in the original S light beam.Then, the liquid crystal molecule in the liquid crystal display 408 to the light of incident reflect, reflection and transmission, thereby the P polarized light that will originally be positioned at horizontal direction rotates to vertical direction, and the S polarized light that will originally be positioned at vertical direction rotates to horizontal direction.At last, transmission and reflection occur at windshield 414 in P polarized light and S polarized light.
Be similar to Fig. 2, in the light path synoptic diagram of Fig. 3, have an angle between the P polarized light of upper polaroid 412 outgoing and S polarized light and the windshield 414, that is P polarized light and S polarized light are not to be incident to reflecting surface with the direction perpendicular to windshield 414.Thus, the P polarized light also can meet with the low phenomenon of Brewster angle (Brewster angle) caused reflectivity.
The defective or the deficiency that meet with for solving Fig. 2 and Fig. 3, the structure that Fig. 4 illustrates according to the HUD of one embodiment of the present invention forms and the light path principle synoptic diagram.
With reference to Fig. 4, this HUD system comprises a backlight module 502, lower polaroid 504, liquid crystal display 508 and upper polaroid 512.Wherein, backlight module 502 is used for providing backlight, thereby real scene image is converted into outgoing beam.From Fig. 2 and Fig. 3 as can be known, this outgoing beam also comprises linear P polarized light and S polarized light.Lower polaroid 304 is arranged at the top of backlight module 502 and the below of liquid crystal display 508, because the angle of the light transmission shaft of lower polaroid 504 and horizontal direction is 45 degree, therefore, the light beam that is positioned at 45 degree directions in the outgoing beam is allowed through.Then, the liquid crystal molecule in the liquid crystal display 508 to the light of incident reflect, reflection and transmission, thereby will be original spend the direction at angles as for horizontal direction folder 135 with the Beam rotation of horizontal direction folder miter angle.Then, the light transmission shaft of upper polaroid 512 be set to and horizontal direction between angle be 135 the degree (that is, the light transmission shaft of upper polaroid 512 is mutually vertical with the light transmission shaft of lower polaroid 504), at this moment, upper polaroid 512 allows to be positioned at 135 light beams of spending directions to be passed through.In conjunction with Fig. 2 and Fig. 3, just perpendicular with windshield from the light beam of upper polaroid 512 outgoing at this moment, therefore, the P polarized light can't meet with the low phenomenon of Brewster angle (Brewster angle) caused reflectivity.
In one embodiment, when liquid crystal display was set to the AHVA pattern, sub-pixel comprised a plurality of the first striped S1 parallel to each other and a plurality of the second striped S2 parallel to each other.Wherein, the first striped S1 and corresponding the second striped S2 intersect at a point, and the first striped S1 is mutually vertical with the second striped S2.
Fig. 5 illustrates the first embodiment of the sub-pixel structure in the HUD of Fig. 4.Be the optical characteristics of the liquid crystal molecule that cooperates liquid crystal display 508, this liquid crystal display comprises a plurality of pixels, and each pixel has a plurality of sub-pixels, for example, and sub-pixel 601, sub-pixel 603 and sub-pixel 605.Wherein, each sub-pixel in the sub-pixel 601,603 and 605 is the structure of parallelogram and non-rectangle, and each sub-pixel comprises a plurality of ITO(tin indium oxides) striped.In this embodiment of Fig. 5, the friction matching of sub-pixel (rubbing direction) is vertical direction, the angle of the first striped S1 and horizontal direction is 45 degree, and the angle of the second striped S2 and horizontal direction is 315 degree (with the positive-angle value of counterclockwise definition).
Fig. 6 illustrates the second embodiment of the sub-pixel structure in the HUD of Fig. 4.Similarly, each pixel comprises a plurality of sub-pixels, for example, and sub-pixel 607, sub-pixel 609 and sub-pixel 611.Each sub-pixel in the sub-pixel 607,609 and 611 is the structure of parallelogram and non-rectangle, and each sub-pixel comprises a plurality of ITO(tin indium oxides) striped.In this embodiment of Fig. 6, the friction matching of sub-pixel (rubbing direction) is horizontal direction, and the angle of the first striped S1 and horizontal direction is 135 degree, and the angle of the second striped S2 and horizontal direction is 225 degree.
Fig. 7 illustrates the 3rd embodiment of the sub-pixel structure in the HUD of Fig. 4.In this embodiment, liquid crystal display is set to the AMVA pattern.Identical with Fig. 5, Fig. 6 is that each sub-pixel in the sub-pixel 613 of Fig. 7,615 and 617 also is the structure of parallelogram and non-rectangle.When different, the ITO striped S3 in these sub-pixels is tire tread shape.
Adopt HUD of the present invention, the second polaroid light transmission shaft separately of the first polaroid of liquid crystal display below and liquid crystal display top is set to mutually vertical, and the sub-pixel in each pixel of this liquid crystal display has a plurality of ITO stripeds, thereby utilize the non-rectangle structure of sub-pixel and axial-rotation so that whole polarization axle tilts to changing into 45 degree, therefore, this HUD had both had the P polarized component from the polarized light of the second polaroid outgoing and had also had the S polarized component, thereby improved the low phenomenon of reflectivity that Brewster angle causes.
Above, describe the specific embodiment of the present invention with reference to the accompanying drawings.But those skilled in the art can understand, and in situation without departing from the spirit and scope of the present invention, can also do various changes and replacement to the specific embodiment of the present invention.These changes and replacement all drop in claims limited range of the present invention.
Claims (9)
1. a HUD (Head-Up Display) is characterized in that described HUD comprises:
One backlight module is for the backlight that described HUD is provided;
One first polaroid is arranged at the top of described backlight module, and the light transmission shaft of described the first polaroid and the angle of horizontal direction are 45 degree;
One liquid crystal display is positioned at the top of described the first polaroid, and described liquid crystal display comprises a plurality of pixels, each pixel has a plurality of sub-pixels, wherein, described sub-pixel is the structure of parallelogram and non-rectangle, and each sub-pixel comprises a plurality of ITO(tin indium oxides) striped; And
One second polaroid is arranged at the top of described liquid crystal display, and described the second polaroid and described the first polaroid are perpendicular, and the light transmission shaft of described the second polaroid and the angle of horizontal direction are 135 degree,
Wherein, described HUD had both had the P polarized component from the polarized light of described the second polaroid outgoing and had also had the S polarized component, in order to improve the low phenomenon of reflectivity that Brewster angle (Brewster angle) causes.
2. HUD according to claim 1 is characterized in that, described liquid crystal display is set to an enhancement mode multizone vertical alignment (AMVA, Advanced Multi-domain Vertical Alignment).
3. HUD according to claim 2 is characterized in that, the ITO striped of described sub-pixel is tire tread shape.
4. HUD according to claim 1 is characterized in that, described liquid crystal display is set to a ultraphotic angle high-resolution (AHVA, Advanced Hyper Viewing Angle) pattern.
5. HUD according to claim 4, it is characterized in that, described sub-pixel comprises a plurality of the first stripeds parallel to each other and a plurality of the second stripeds parallel to each other, wherein, described the first striped and corresponding the second striped intersect at a point, and described the first striped is mutually vertical with described the second striped.
6. HUD according to claim 5 is characterized in that, the friction matching of described sub-pixel (rubbing direction) is vertical direction.
7. HUD according to claim 6 is characterized in that, the angle of described the first striped and horizontal direction is 45 degree, and the angle of described the second striped and horizontal direction is 315 degree.
8. HUD according to claim 5 is characterized in that, the friction matching of described sub-pixel (rubbing direction) is horizontal direction.
9. HUD according to claim 8 is characterized in that, the angle of described the first striped and horizontal direction is 135 degree, and the angle of described the second striped and horizontal direction is 225 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210528024 CN102998839A (en) | 2012-12-10 | 2012-12-10 | Head raising displayer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210528024 CN102998839A (en) | 2012-12-10 | 2012-12-10 | Head raising displayer |
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| CN102998839A true CN102998839A (en) | 2013-03-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093525A (en) * | 2014-05-08 | 2015-11-25 | 广达电脑股份有限公司 | electronic glasses |
| CN106291929A (en) * | 2015-06-10 | 2017-01-04 | 中华映管股份有限公司 | New line display module |
| CN110770635A (en) * | 2017-09-28 | 2020-02-07 | 麦克赛尔株式会社 | Head-up display device |
| CN115128814A (en) * | 2016-09-06 | 2022-09-30 | 麦克赛尔株式会社 | Head-up display |
-
2012
- 2012-12-10 CN CN 201210528024 patent/CN102998839A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093525A (en) * | 2014-05-08 | 2015-11-25 | 广达电脑股份有限公司 | electronic glasses |
| CN106291929A (en) * | 2015-06-10 | 2017-01-04 | 中华映管股份有限公司 | New line display module |
| CN115128814A (en) * | 2016-09-06 | 2022-09-30 | 麦克赛尔株式会社 | Head-up display |
| CN115128814B (en) * | 2016-09-06 | 2023-09-15 | 麦克赛尔株式会社 | Head-up display |
| CN110770635A (en) * | 2017-09-28 | 2020-02-07 | 麦克赛尔株式会社 | Head-up display device |
| CN110770635B (en) * | 2017-09-28 | 2023-08-11 | 麦克赛尔株式会社 | Head-up display device |
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Application publication date: 20130327 |