CN102087435B - Reflection device and liquid crystal display device using the same - Google Patents
Reflection device and liquid crystal display device using the same Download PDFInfo
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- CN102087435B CN102087435B CN2009102000113A CN200910200011A CN102087435B CN 102087435 B CN102087435 B CN 102087435B CN 2009102000113 A CN2009102000113 A CN 2009102000113A CN 200910200011 A CN200910200011 A CN 200910200011A CN 102087435 B CN102087435 B CN 102087435B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 24
- 239000011295 pitch Substances 0.000 claims 3
- 238000002310 reflectometry Methods 0.000 abstract description 19
- 230000000007 visual effect Effects 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
A reflective device comprising a reflective layer comprising protrusions which are stripe-shaped protrusions extending around a central direction. The reflecting device provided by the invention has higher reflectivity and good uniformity in all azimuth angles. In addition, in the reflecting device provided by the invention, if the widths or the intervals of the strip-shaped bulges are different or the widths and the intervals are different, the interference phenomenon of light can be avoided, so that the poor visual effect is avoided. The invention also provides a liquid crystal display device which comprises a plurality of pixel units, wherein each pixel unit comprises a reflecting area, and the reflecting area adopts the reflecting device.
Description
Technical field
The present invention relates to field of liquid crystal display, especially design a kind of reflection unit and the liquid crystal indicator of using said reflection unit that is used for field of liquid crystal display.
Background technology
LCD can be divided into the transmissive type liquid crystal display that uses built-in backlight, the reflective liquid-crystal display of reflect ambient light and the half-reflection and half-transmission formula LCD that transmission and reflection are combined according to the light source difference that adopts.
Reflective liquid-crystal display; And the reflecting part in the half-reflection and half-transmission formula LCD; Therefore its advantage is that catoptrical contrast does not receive the influence of surround lighting, and in the strong occasion of surround lighting (such as periods of direct sunlight time), LCD can keep good visuality (readability).Reflective liquid-crystal display, and comprise reflection unit in the half-reflection and half-transmission formula LCD, be used to reflect the light of extraneous incident.During the design reflectivity device, the reflected light that how to obtain high reflectance and high-contrast is the factor that the designer considers.
Simultaneously, catoptrical directivity is one of factor that influences at visual angle (viewing angle).If the surface of reflection unit constitutes direct reflection, then for the light source with directivity (such as daylight, light) of extraneous incident; After direct reflection, the excessive formation dazzle of brightness on the emergent light direction, reflected light disappearance on other view directions; Brightness is extremely low, causes reflection characteristic bad.
Bad for fear of reflection characteristic, transform reflection unit and make it produce diffuse reflection, producing one of irreflexive scheme is exactly overshooting shape reflection unit (bumpy reflector).
In notification number is the Chinese patent of CN1304890C, disclose a kind of reflection unit that has bulbous protrusion,, shown the structure and the partial top view of said patent respectively with reference to figure 1 and Fig. 2.Said reflection unit comprises the reflecting surface 100 with reflective metal layer; Be distributed widely in a plurality of hemispherical projections 101 on the said reflecting surface 100; The scope of the ratio of the radius of said hemispherical projections 101 and height is 20: 1～7: 1, and the radius of said hemispherical projections 101 is 3 μ m～20 μ m.Said hemispherical projections 101 makes the surround lighting generation diffuse reflection of incident, and reflected light can evenly or substantially disperse outgoing equably in a big Space Angle scope, promptly eliminated dazzle, has also supplied dark angle.
With reference to figure 3, show the synoptic diagram of another kind of reflection unit in the prior art.Said reflection unit comprises a plurality of strip projections, the first strip set of protrusions 302 and the second strip set of protrusions 301 that said strip protrusion-shaped is orthogonal and alternately arranges.
With reference to figure 4, show the diagrammatic cross-section of projection 403.Carry out the optical reflection specificity analysis in the face of projection 403 down; Incident light 401 is parallel beams; Have directivity, said incident light 401 projects liquid crystal upper substrate 404 and reflects, and the surface that projects projection 403 is afterwards reflected; Reflection ray is from 404 outgoing of liquid crystal upper substrate, and emergent light 402 gets into human eye.The reflecting surface zone that is surrounded by incident light 401, reflected light 402, normal (as indicated with a dotted line in Fig. 4) is actual usable reflection district 405, and said actual usable reflection district 405 is very little.In reflection unit echo area of the same area, actual usable reflection district 405 is big more, and the light that then can get into human eye is many more, and the reflectivity of said reflection unit is high.
With reference to figure 5, show the simulation drawing in bulbous protrusion 501 and strip projection 503 actual usable reflection districts.Receive process technology limit, bulbous protrusion 501 can not infinitely be dwindled, and in the echo area promptly of the same area, the quantity of bulbous protrusion is limited, and the area in the actual usable reflection district 502 of bulbous protrusion also is restricted so.And strip projection 503 links bigger actual usable reflection district in the former zone that belongs to bulbous protrusion 501 gaps.As shown in Figure 5; Under the situation that takies the equal area echo area; When identical incident light incident 505; The actual usable reflection district 504 of strip projection reflection unit 503 is greater than the actual usable reflection district 502 of bulbous protrusion 501 reflection units, so the reflectivity of strip projection reflection unit 503 is superior to bulbous protrusion reflection unit 501.
Strip projection reflection unit can increase actual specular cross section.The strip projection reflection unit of arranging in length and breadth as shown in Figure 3 has higher reflectivity in orthogonal azimuths, and still, other azimuthal reflectivity of said reflection unit are lower.
Summary of the invention
What the present invention solved is the problem that reflection unit does not have a plurality of continuous azimuthal high reflectances.
For addressing the above problem, the present invention provides a kind of reflection unit, and said reflection unit comprises the reflection horizon, and said reflection horizon comprises projection, and said projection is the strip projection of extending around a center position.
Optional, said center is the center of said reflection unit.
Optional, said strip projection is many concentric annular projections.
Optional, said strip projection is many concentric polygon projections with fillet.
Optional, each fillet radian is identical in the said polygon, and the radian sum of all fillets is more than or equal to 360 degree.
Optional, said polygon is a regular polygon.
Optional, said regular polygon is a square.
Optional, said regular polygon is a regular hexagon.
Optional, said strip projection is the spirality projection.
Optional, said strip projection is the square spiral shape projection with fillet.
Optional, the spacing of said strip projection is identical.
Optional, the width of adjacent two strip projections is inequality.
Optional, the spacing of said strip projection is inequality.
Correspondingly, the present invention also provides a kind of liquid crystal indicator, and it comprises a plurality of pixel cells, and each pixel cell comprises the echo area, and foregoing reflection unit is adopted in this echo area.
Optional, said center is the center of said reflection unit.
Optional, said strip projection is many concentric annular projections.
Optional, said strip projection is many concentric polygon projections with fillet.
Optional, each fillet radian is identical in the said polygon, and the radian sum of all fillets is more than or equal to 360 degree.
Optional, said polygon is a regular polygon.
Optional, said regular polygon is a square.
Optional, said regular polygon is a regular hexagon.
Optional, said strip projection is the spirality projection.
Optional, said strip projection is the round screw thread projection.
Optional, said strip projection is the square spiral shape projection with fillet.
Optional, the spacing of said strip projection is identical.
Optional, the width of adjacent two strip projections is inequality.
Optional, the spacing of said strip projection is inequality.
Compared with prior art, the present technique scheme has the following advantages: said reflection unit comprises the strip projection of extending around a center position.Because said projection is the strip projection, the area in actual usable reflection district is bigger, and reflectivity is high; Simultaneously, said strip projection is extended around a center position, then on a plurality of continuous position angles, all has higher reflectivity at said reflection unit.The liquid crystal indicator of using said reflection unit has above-mentioned advantage equally.
Description of drawings
Fig. 1 is a kind of prior art reflection unit cross section structure synoptic diagram;
Fig. 2 is the vertical view of reflection unit shown in Figure 1;
Fig. 3 is the vertical view of another kind of prior art reflection unit;
Fig. 4 is the reflected light path analysis chart of projection;
Fig. 5 is the simulation synoptic diagram in the actual usable reflection district of prior art reflection unit;
Fig. 6 is the schematic top plan view of reflection unit first embodiment of the present invention;
Fig. 7 is the schematic top plan view of reflection unit second embodiment of the present invention;
Fig. 8 is the schematic top plan view of reflection unit the 3rd embodiment of the present invention;
Fig. 9 is the schematic top plan view of reflection unit the 4th embodiment of the present invention;
Figure 10 is the optical interference circuit synoptic diagram that regular protrusions causes;
Figure 11 is the schematic top plan view that reflection unit first of the present invention is optimized embodiment;
Figure 12 is the schematic top plan view that reflection unit second of the present invention is optimized embodiment.
Embodiment
The designer finds that the strip projection can improve the reflectivity of reflection unit, but the strip set of protrusions that quadrature is alternately arranged in the prior art has higher reflectivity in orthogonal azimuths, but lower at other position angle reflectivity.The designer seeks to utilize the strip projection to come new departure of design reflectivity device, when guaranteeing high reflectance, overcomes the above problems.
The invention provides a kind of reflection unit, said reflection unit comprises the reflection horizon, and said reflection horizon comprises projection, and said projection is the strip projection of extending around a center position.Because said projection is the strip projection, the area in actual usable reflection district is bigger, and reflectivity is high; Simultaneously, said strip projection is extended around a center position, then on a plurality of continuous position angles, all has higher reflectivity at said reflection unit.
With reference to figure 6, show the schematic top plan view of reflection unit first embodiment of the present invention.Said reflection unit comprises reflection horizon 602, and said reflection horizon comprises projection, and said projection is many concentric annular projections 601.Preferably, the center of said many concentric annular projections 601 is centers of reflection unit.The width of said concentric ring-like projection 601 is identical with spacing.Because said concentric ring-like projection 601 is strip projections, the area in actual usable reflection district is bigger, and reflectivity is high; Simultaneously, concentric ring-like projection 601 has identical or roughly the same reflecting surface on the position angle arbitrarily, and said concentric ring-like projection 601 all has higher reflectivity, good uniformity on full azimuth.
With reference to figure 7, show the schematic top plan view of reflection unit second embodiment of the present invention.The projection of said reflection unit is many concentric square protrusions with fillet 701.Preferably, the center of said many concentric square protrusions 701 is centers of reflection unit.The width of said square protrusions 701 is identical with spacing.The straight portion of said square protrusions 701 forms the strip set of protrusions of arranging in length and breadth, on orthogonal azimuths, has higher reflectivity, and four fillets of said square protrusions 701 then can make reflection unit on other position angles, have reflecting surface.Preferably, the radian of said four fillets is identical, and more than or equal to 90 degree, reflection unit all has reflecting surface on the position angle arbitrarily like this, and then improves the homogeneity of reflection unit.Particularly, can adjust the length of said projection straight portion and the ratio of radius of corner, to satisfy the designing requirement of reflection unit.
Projection in the reflection unit of the present invention can also be out of shape to some extent; Such as the concentric hexagon with fillet (as shown in Figure 8) or other concentric polygons with fillet; Through adjusting polygonal straight portion and radius of corner; Make in the said polygon each fillet radian identical, and the radian sum of fillet is more than or equal to 360 degree, can be implemented in like this on the arbitrary orientation angle of reflection unit and all have reflecting surface.In addition, the projection in apparatus of the present invention can also be the spiral figure around the reflecting surface center except being the concentric figure, for example round screw thread figure or the square spiral figure with fillet as shown in Figure 9.Those skilled in the art can make amendment to the present invention and are out of shape according to the foregoing description, do not add detailed description at this.
Reflection unit provided by the invention comprises the strip projection that centers on center position extension owing to be the strip projection, and the area in actual usable reflection district is bigger, and reflectivity is high; Simultaneously, said strip projection then all has higher reflectivity, good uniformity at said reflection unit having a reflecting surface at least on the position angle arbitrarily on full azimuth.
In the foregoing description, the width of said projection is identical with spacing, and this causes the interference of light phenomenon easily.With reference to Figure 10, show incident light 801 and project first projection and reflect, reflected light is 802; Incident light 803 projects second projection and reflects, and reflected light is 804, and the optical path difference 805 of two-way light is expressed as d, as d=(N+1/2) * λ (N=0,1,2,3......; λ is an optical wavelength) time, occur interfering disappearing mutually, constitute the dim spot in the hot spot; As d=N * λ (N=0,1,2,3......; λ is an optical wavelength) time, it is long mutually interference to occur, constitutes the incandescent point that exceeds common brightness in the hot spot.Because the width of projection all is a rule with the interval, optical path difference 805 long mutually point must occur and disappear mutually a little in the process that increases gradually, and inevitable periodicity emphasis is appeared again at present.
So if the width of said strip projection is identical with spacing, this can cause the interference of light phenomenon, human eye can be observed the interference hot spot of similar asterism shape, and visual effect is bad.The inventor has carried out further optimization to previous embodiment for this reason.
With reference to Figure 11, show the schematic top plan view that reflection unit first of the present invention is optimized embodiment.Among said the 3rd embodiment, said projection also is concentric ring-like projection 901, is that with the difference of first embodiment width of concentric ring-like projection 901 or spacing are inequality, and perhaps width and spacing are all inequality.
With reference to Figure 12, show the schematic top plan view that reflection unit second of the present invention is optimized embodiment.Among said the 4th embodiment, said projection is the concentric square protrusions with fillet 902, and the width or the spacing of square protrusions 902 that is to have fillet with the difference of second embodiment is inequality, and perhaps width and spacing are all inequality.
Among the optimization embodiment of reflection unit provided by the invention, the width or the spacing of strip projection are inequality, and perhaps width and spacing are all inequality, can avoid like this producing the interference of light phenomenon, and visual effect is good.
The present invention also provides a kind of liquid crystal indicator, and it comprises a plurality of pixel cells, and each pixel cell comprises the echo area, and aforementioned reflection unit is adopted in this echo area.
Though oneself discloses the present invention as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art are not breaking away from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (18)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102000113A CN102087435B (en) | 2009-12-02 | 2009-12-02 | Reflection device and liquid crystal display device using the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102000113A CN102087435B (en) | 2009-12-02 | 2009-12-02 | Reflection device and liquid crystal display device using the same |
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| Publication Number | Publication Date |
|---|---|
| CN102087435A CN102087435A (en) | 2011-06-08 |
| CN102087435B true CN102087435B (en) | 2012-05-30 |
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| CN2009102000113A Expired - Fee Related CN102087435B (en) | 2009-12-02 | 2009-12-02 | Reflection device and liquid crystal display device using the same |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102929463A (en) * | 2012-11-08 | 2013-02-13 | 深圳市长江力伟股份有限公司 | Capacitive touch screen capable of slowing down light interference effectively |
| CN109884831A (en) * | 2019-03-06 | 2019-06-14 | 京东方科技集团股份有限公司 | Reflection type display device, display panel and its manufacturing method |
| TWI748875B (en) * | 2021-02-19 | 2021-12-01 | 友達光電股份有限公司 | Bump structure and liquid crystal display |
| CN118151430A (en) | 2022-06-17 | 2024-06-07 | Tcl华星光电技术有限公司 | Display panel and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5610741A (en) * | 1994-06-24 | 1997-03-11 | Sharp Kabushiki Kaisha | Reflection type liquid crystal display device with bumps on the reflector |
| CN2457630Y (en) * | 2000-08-17 | 2001-10-31 | 中强光电股份有限公司 | backlight |
| CN1382263A (en) * | 1999-10-21 | 2002-11-27 | 松下电器产业株式会社 | Reflecting plate method for manufacturing same, display element and display device |
| CN1393703A (en) * | 2001-06-22 | 2003-01-29 | 日本电气株式会社 | Reflecting plate and its mfg. method, liquid crystal display and its mfg. method |
| JP2003344841A (en) * | 2002-05-29 | 2003-12-03 | Nec Lcd Technologies Ltd | Reflective liquid crystal display |
| CN1523429A (en) * | 2003-02-21 | 2004-08-25 | 精工爱普生株式会社 | Liquid crystal display device, reflector and electronic equipment |
| CN1821846A (en) * | 2005-02-14 | 2006-08-23 | Nec液晶技术株式会社 | Reflector in liquid crystal display and manufacturing method thereof |
| CN1902533A (en) * | 2004-01-05 | 2007-01-24 | 皇家飞利浦电子股份有限公司 | A reflective structure and an image display device |
-
2009
- 2009-12-02 CN CN2009102000113A patent/CN102087435B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5610741A (en) * | 1994-06-24 | 1997-03-11 | Sharp Kabushiki Kaisha | Reflection type liquid crystal display device with bumps on the reflector |
| CN1382263A (en) * | 1999-10-21 | 2002-11-27 | 松下电器产业株式会社 | Reflecting plate method for manufacturing same, display element and display device |
| CN2457630Y (en) * | 2000-08-17 | 2001-10-31 | 中强光电股份有限公司 | backlight |
| CN1393703A (en) * | 2001-06-22 | 2003-01-29 | 日本电气株式会社 | Reflecting plate and its mfg. method, liquid crystal display and its mfg. method |
| JP2003344841A (en) * | 2002-05-29 | 2003-12-03 | Nec Lcd Technologies Ltd | Reflective liquid crystal display |
| CN1523429A (en) * | 2003-02-21 | 2004-08-25 | 精工爱普生株式会社 | Liquid crystal display device, reflector and electronic equipment |
| CN1902533A (en) * | 2004-01-05 | 2007-01-24 | 皇家飞利浦电子股份有限公司 | A reflective structure and an image display device |
| CN1821846A (en) * | 2005-02-14 | 2006-08-23 | Nec液晶技术株式会社 | Reflector in liquid crystal display and manufacturing method thereof |
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| CN102087435A (en) | 2011-06-08 |
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