CN100346211C - Liquid-crystal display devices - Google Patents
Liquid-crystal display devices Download PDFInfo
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- CN100346211C CN100346211C CNB2004100476264A CN200410047626A CN100346211C CN 100346211 C CN100346211 C CN 100346211C CN B2004100476264 A CNB2004100476264 A CN B2004100476264A CN 200410047626 A CN200410047626 A CN 200410047626A CN 100346211 C CN100346211 C CN 100346211C
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- polarizer
- lcd
- light
- plane
- diaphragm
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Abstract
The present invention provides a liquid crystal display device which comprises a liquid crystal display panel and a first polarization plate, wherein the first polarization plate comprises a first surface and a second surface which faces to the liquid crystal display panel and is opposite to the first surface. The first surface comprises a plurality of first prism structures.
Description
Technical field
The present invention is about a kind of LCD, particularly a kind of semi-penetrated semi-reflected liquid crystal display.
Background technology
Since LCD have slimming, low power consumption, radiationless pollution and can be compatible etc. with semiconductor process techniques advantage, therefore be widely used on the portable communications products such as notebook computer, personal digital assistant, mobile phone.
Generally speaking, LCD can be divided into penetration, reflective, and three kinds of semi-penetration, semi-reflectives etc. according to the source of illumination light, wherein penetrating LCD has a backlight that is used for producing light usually, and the light that backlight produced can be by liquid crystal cells and each optical element (for example: Polarizer), and then allow the user can watch the picture of LCD to show.In addition, reflective liquid-crystal display then is to have a reflecting surface (as aluminum metal), and when reflective liquid-crystal display display frame, light (for example: surround lighting or front light-source) is entered in the LCD by panel the place ahead, and by liquid crystal cells and each optical element, light is reflected back with rear reflective surface, the light that is reflected can pass liquid crystal cells and each optical element more again, and last user just can watch the picture of LCD to show.On the other hand, semitransparent and half-reflective liquid crystal display then is the LCD that has the pattern of penetrating and reflective-mode simultaneously, that is to say, strong or when needing more weak light when showing when ambient light intensity, LCD just can be closed backlight, and utilize surround lighting to come display frame with reflective-mode as light source, anti-, more weak or when needing stronger light when showing when ambient light intensity, LCD just can be opened backlight and be utilized the pattern of penetrating to come display frame, just can reduce the power consumption of backlight thus.
In addition, (for example: be to be one of developing goal to reduce power consumption mobile phone), therefore, semitransparent and half-reflective liquid crystal display is widely used in portable type electronic product because portable type electronic product.It for example is example with the mobile phone, when mobile phone is in standby mode, the panel of mobile phone is to be used for messages such as demonstration time or missed call mostly, so do not need too strong light usually, the user just can watch display frame, therefore, the panel of mobile phone just can utilize surround lighting as light source, comes display frame with reflective-mode.On the other hand, when mobile phone is in the use pattern, the numeral or the literal that show on the panel in order to allow the user clearly watch, the panel of mobile phone just can be opened backlight, and utilizes the pattern of penetrating to come display frame.
For example, Taiwan patent case numbers 422934 has just disclosed a kind of semi-penetrated semi-reflected liquid crystal display, its structure is last Polarizer/liquid crystal cells/following Polarizer/semi-penetration plate/bias light, wherein when this bias light is closed, this semi-penetration plate is used for external environment light is reflected back, so that LCD utilizes reflective-mode to come display frame.Otherwise when this bias light was opened, the light that this bias light produced just can pass this semi-penetration plate, so that the LCD utilization pattern of penetrating is come display frame.Yet, because the LCD of this type must additionally add a semi-penetration plate, just can reach the effect of semi-penetration semi-reflective, thus, not only can improve the complexity of making LCD, more can increase the cost of manufacture of LCD.
Summary of the invention
Therefore, one of purpose of the present invention provides a kind of semi-penetrated semi-reflected liquid crystal display, to solve aforesaid problem.
According to purpose of the present invention, the preferred embodiments of the present invention provide a kind of LCD, it includes a display panels and one first Polarizer, this first Polarizer include one first, with one towards this display panels and with respect to this first second, and this first bread contains a plurality of first prism structures.
In a preferred embodiment; LCD of the present invention also comprises second Polarizer of a side that deviates from first Polarizer that is arranged on display panels; second Polarizer includes the 3rd diaphragm towards display panels; one the 4th diaphragm, and second light polarizing film between the 3rd diaphragm and the 4th diaphragm with respect to the 3rd diaphragm.Preferably, the 4th diaphragm surface is provided with prism structures.
Because Polarizer down of the present invention includes a plurality of prism structures, therefore the surround lighting of part can produce reflection in this time Polarizer, and then makes LCD of the present invention can utilize external environment light to come display frame.
Description of drawings
Fig. 1 is the synoptic diagram of a LCD of first embodiment of the invention;
Fig. 2 is the enlarged diagram of following Polarizer shown in Figure 1;
Fig. 3 is the optical analogy result of various prism angles of the present invention;
Fig. 4 is the synoptic diagram of the following Polarizer of second embodiment of the invention;
Fig. 5 is the synoptic diagram of the following Polarizer of third embodiment of the invention;
Fig. 6 is the synoptic diagram of the following Polarizer of fourth embodiment of the invention;
Fig. 7 is the synoptic diagram of the following Polarizer of fifth embodiment of the invention;
Fig. 8 is the synoptic diagram of the following Polarizer of sixth embodiment of the invention;
Fig. 9 is the synoptic diagram of a LCD of second embodiment of the invention.
Description of reference numerals
10 LCD, 12 display panels
Polarizer on 14 modules 16 backlight
First of 18 times Polarizer 18a
Second 20a diaphragm of 18b
20b light polarizing film 20c diaphragm
20d thin layer 22 prism structures
22b plane, 22a plane
24b infrabasal plate 25 prism structures
25b plane, 25a plane
26 layer of liquid crystal molecule 28a conductive layers
28b conductive layer 30 light sources
32 light guide plate, 34 reflector plates
36 diffusion barriers, 38 surround lightings
40 light, 42 users
46 surround lighting 46a light
50 LCD, 52 display panels
Polarizer on 54 modules 56 backlight
Second of first 56b of 56a
First of 58 times Polarizer 58a
Second 60a upper substrate of 58b
60b infrabasal plate 62 layer of liquid crystal molecule
64a conductive layer 64b conductive layer
66 light sources, 68 light guide plate
70 reflector plates, 72 diffusion barriers
74 prism structure 74a planes
The 74b plane
Embodiment
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the synoptic diagram of a LCD of first embodiment of the invention, and Fig. 2 is the enlarged diagram of following Polarizer shown in Figure 1.As shown in Figure 1, one LCD 10 includes a display panels 12, one module 14 backlight, be used to provide the required light of display panels 12, Polarizer 16 on one, be arranged on the display panels 12, and Polarizer 18 once, be arranged between display panels 12 and the module backlight 14, and down Polarizer 18 is used for the surround lighting of reflecting part by display panels 12.Wherein, display panels 12 includes a upper substrate 24a, and an infrabasal plate 24b is arranged at the below of upper substrate 24a, and a layer of liquid crystal molecule 26, is filled between upper substrate 24a and the infrabasal plate 24b.On the other hand, display panels 12 includes a conductive layer 28a in addition, be arranged between upper substrate 24a and the layer of liquid crystal molecule 26, an and conductive layer 28b, be arranged between infrabasal plate 24b and the layer of liquid crystal molecule 26, and conductive layer 28a and conductive layer 28b are used to provide an electric field and give layer of liquid crystal molecule 26, so that the liquid crystal molecule in the layer of liquid crystal molecule 26 can produce corresponding deflection according to this electric field, and then produce due light transmittance.Generally speaking, upper substrate 24a and infrabasal plate 24b are made of transparent material (for example: glass or quartz), the material of conductive layer 28a and 28b then includes transparent conductive materials such as tin indium oxide or indium zinc oxide usually, and descend Polarizer 18 can select the polarized light of a certain specific direction, that is Polarizer 18 only can allow the polarized light of a certain specific direction to pass through down.
In addition, as shown in Figure 1, module 14 backlight includes a light source 30, be used for producing light, a light guide plate 32 is arranged at a side of light source 30 and is used for guiding the light that light source 30 is produced, one reflector plate 34, be arranged at light guide plate 32 belows and be used for upwards reflection of light, and a diffusion barrier 36, be arranged at light guide plate 32 tops and be used for making light to produce the effect of homogenising.Wherein, the material of diffusion barrier 36 can be polycarbonate, tygon terephthaldehyde acetoacetic ester or acryl etc., reflector plate 34 is formed by a material with high reflectance, for example metal such as aluminium, copper or its alloy, light source 30 then can be cold-cathode tube, HCFL or light emitting diode etc.In addition,, also can be provided with protection diffusion sheet (not shown) and a prismatic lens (not shown) between light guide plate 32 and the following Polarizer 18 according to the demand of different product, and in addition additions and deletions or the adjustment of the quantity of this diffusion sheet and this prismatic lens and the visual demand of order.On the other hand, also can include a colored filter (not being shown among Fig. 1) that is arranged on the upper substrate 24a in the display panels 12, be used for allowing the user can watch colored image frame.
In addition, as shown in Figure 1, the one side that includes down Polarizer 18 of the present invention support or oppose first 18a and second 18b towards display panels 12 of optical mode group 14, and as shown in Figure 2, first 18a of following Polarizer 18 includes a plurality of prism structures 22, and each prism structure 22 has a plane 22a and a plane 22b, be used for the reflecting part surround lighting (for example: surround lighting 38 shown in Figure 1).General; following Polarizer 18 is made of a light polarizing film 20b and two diaphragm 20a and 20c; the material of light polarizing film 20b polyvinyl alcohol (PVA) (PVA) normally wherein; and the material of diaphragm 20a and 20c is cellulose acetate film (TAc) mostly; and the first embodiment of the present invention utilizes roller to impress diaphragm 20c, forms each prism structure 22 shown in Figure 2 with the top layer in diaphragm 20c.
It should be noted that, as shown in Figure 2, because the refractive index (approximately being 1.5) of following Polarizer 18 is the refractive indexes (approximately being 1.0) greater than external environment, therefore the refracted ray 46a when surround lighting 46 is incident on the 22b of plane, and the incident angle of light 46a is during greater than the critical angle (criticalangle) of following Polarizer 18, whole light 46a can be reflected back toward down in the Polarizer 18, and can not pass through down the interface of Polarizer 18 and external environment, in other words, when the incident angle of light 46a during greater than the critical angle of Polarizer 18 down, light 46a can produce total reflection at plane 22b.In the same manner, when the reflection ray 46b of light 46a is incident on the 22a of plane, and when the incident angle of light 46b is bigger than the critical angle of descending Polarizer 18 again, light 46b just can produce total reflection at plane 22a, and the reflection ray 46c of light 46b can leave down Polarizer 18 and returns in the external environment.In addition, if the incident angle of light 46b during less than the critical angle of following Polarizer 18, just light 46b can pass plane 22a, and may produce reflection, and return in the external environment in adjacent prism structure 22.What deserves to be mentioned is that the present invention is according to above-described characteristic, and via the angle theta of adjusting plane 22a and plane 22b
1, with the reflection of ambient light of special angle to visible angle (viewing angle) scope of LCD.For instance, if required horizontal visible angle and the vertical visible angle of product is respectively 100 degree and 40 degree, just the present invention can be via the angle theta of adjusting plane 22a and plane 22b
1, to incite somebody to action reflection of ambient light partly to aforesaid visible angle scope.In other words, Polarizer 18 down of the present invention not only can be used to the surround lighting of reflecting part, so that LCD 10 is come display frame by surround lighting, the present invention more can be via the angle theta of adjusting plane 22a and plane 22b
1, with reflection of ambient light to the visible angle scope of LCD 10.
In addition, because reflecting effect and the plane 22a of each prism structure 22 and the angle theta of plane 22b of following 18 pairs of surround lightings of Polarizer
1(that is: the prism angle) relevant, therefore the present invention is directed to different prism angles carries out optical analogy, and its result is as shown in Figure 3.Wherein, as shown in Figure 2, in the light reflection simulation process of following Polarizer 18, light source is incident to down oneself second 18b of following Polarizer 18 of the light in 120 ° of scopes within the Polarizer 18, and then compute ray produces the ratio of reflection within following Polarizer 18, with the ratio that obtains light reflection shown in Figure 3 (that is: the data shown in the symbol " ").On the other hand, light at following Polarizer 18 penetrates in the simulation process, light source is incident to down oneself first 18a of following Polarizer 18 of the light in 70 ° of scopes within the Polarizer 18, compute ray penetrates down the ratio of Polarizer 18 more subsequently, with the ratio that obtains light penetration shown in Figure 3 (that is: the data shown in the symbol " ■ ").Must be noted that as shown in Figure 3, when the angle theta of plane 22a and plane 22b
1In the time of between 70 degree and 120 degree, light has preferred reflecting effect in the Polarizer 18 down.
Please continue again next will explain the display packing of LCD 10 of the present invention with reference to figure 1.As shown in Figure 1, when module 14 backlight was opened, the light 40 that light source 30 is produced is process light guide plate 32 earlier, and then passed diffusion barrier 36, following Polarizer 18, display panels 12 in order and go up Polarizer 16, at last, user 42 just can watch the image frame of LCD 10.On the other hand, when module 14 backlight is closed, extraneous surround lighting 38 can be in regular turn by last Polarizer 16 and display panels 12, the surround lighting 38 of subsequent section can produce reflection in the Polarizer 18 down, and the surround lighting 38 that is reflected can pass display panels 12 more in regular turn and go up Polarizer 16, at last, user 42 just can see the image frame of LCD 10.In addition, aforesaid surround lighting 38 only is the display mode that is used for explaining LCD 10 of the present invention with the travel path of light 40, is not actual light travel path.
What deserves to be mentioned is, because inclined to one side plate 18 has a plurality of prism structures 22 under of the present invention, therefore can increase surround lighting and produce the ratio that reflects in the inclined to one side plate 18 down, and then can make LCD 10 utilize surround lighting to come display frame, in other words, the present invention does not need additionally to add a semi-penetration semi-reflective film, just can reach the effect of semi-penetration semi-reflective, therefore the present invention not only can reduce the complexity of making LCD, more can reduce the cost of manufacture of LCD.In addition, as shown in Figure 1, because surround lighting 38 is producing reflection in the Polarizer 18 down, so surround lighting 38 passes through last Polarizer 16, following Polarizer 18 in regular turn and goes up Polarizer 16, and because surround lighting 38 passes through 2 Polarizers, so the contrast of LCD 10 is relatively good, so the present invention can promote the contrast effect of LCD 10.
On the other hand, following Polarizer 18 shown in Figure 2 is not unique structure of the present invention, below will introduce the following polarized light plate structure of other embodiments of the invention.Please refer to Fig. 4, Fig. 4 is the synoptic diagram of the following Polarizer of second embodiment of the invention, can include a plane 22c between the wherein adjacent two prisms structure 22.In addition; please refer to Fig. 5, Fig. 5 is the synoptic diagram of the following Polarizer of third embodiment of the invention, and wherein the third embodiment of the present invention is utilized methods such as wire mark or attaching; and each prism structure 22 is formed at the surface of diaphragm 20c, and each prism structure 22 normally is made of hardening resin.In addition; please refer to Fig. 6; Fig. 6 is the synoptic diagram of the following Polarizer of fourth embodiment of the invention; wherein descend Polarizer 18 to include a thin layer 20d in addition; and each prism structure 22 is formed at the top layer of thin layer 20d, and in addition, thin layer 20d is attached at the surface of diaphragm 20c via a diffusion glue 21; and diffusion glue 21 be used for atomizing light and constituted by PSA pressure-sensitive adhesive agent, and the material of thin layer 20d includes hardening resin.Please refer to Fig. 7; Fig. 7 is the synoptic diagram of the following Polarizer of fifth embodiment of the invention; wherein descend Polarizer 18 to include a thin layer 20d in addition; and the fifth embodiment of the present invention is utilized methods such as wire mark or attaching; and each prism structure 22 is formed at the surface of thin layer 20d; in addition; thin layer 20d is attached at the surface of diaphragm 20c via a diffusion glue 21; and diffusion glue 21 be used for atomizing light and constituted by PSA pressure-sensitive adhesive agent, and the material of thin layer 20d and each prism structure 22 includes hardening resin.Please refer to Fig. 8; Fig. 8 is the synoptic diagram of the following Polarizer of sixth embodiment of the invention; wherein descend second 18b of Polarizer 18 also to include a plurality of prism structures 25; each prism structure 25 is formed at the top layer of diaphragm 20a; and each prism structure 25 has a plane 25a and a plane 25b; and in the fifth embodiment of the present invention, the angle theta of plane 25a and plane 25b
2Between 70 ° and 120 °, and the method for making of each prism structure 25 can be Fig. 4 to shown in Figure 7 any.
In addition, please refer to Fig. 9, Fig. 9 is the synoptic diagram of a LCD of second embodiment of the invention.As shown in Figure 8, a LCD 50 includes the module backlight 54 that a display panels 52 and is used for producing light.Wherein, display panels 52 includes a upper substrate 60a, one infrabasal plate 60b, be arranged at the below of upper substrate 60a, a layer of liquid crystal molecule 62 is filled between upper substrate 60a and the infrabasal plate 60b, one conductive layer 64a, be arranged between upper substrate 60a and the layer of liquid crystal molecule 62, and a conductive layer 64b, be arranged between infrabasal plate 60b and the layer of liquid crystal molecule 62.In addition, module 54 backlight includes a light source 66, a light guide plate 68, a reflector plate 70 and a diffusion barrier 72.
As shown in Figure 9, LCD 50 includes Polarizer 56 in addition, be arranged on the display panels 52 and allow the polarized light of a certain specific direction to pass through, and Polarizer 58 once, be arranged between display panels 52 and the module backlight 54 and allow the polarized light of a certain specific direction to pass through.Wherein, following Polarizer 58 includes first 58a and second 58b with respect to first 58a with a plurality of prism structures 59, and the function of following Polarizer 58 is identical with following Polarizer 18 shown in Figure 1, that is part can generation reflection in following Polarizer 58 by the surround lighting of display panels 52.On the other hand, the structure of following Polarizer 58 is not limited to shown in Figure 9, and the structure of following Polarizer 58 can also be that Fig. 4 to Fig. 8 is wherein a kind of.
In addition, as shown in Figure 9, last Polarizer 56 includes one first 56a and one second 56b, and wherein second 56b includes a plurality of prism structures 74, each prism structure 74 all has a plane 74a and a plane 74b, and the angle of plane 74a and plane 74b is between 70 ° and 120 °.It should be noted that Polarizer 56 is used for being added to light quantity, and then can increase the reflection ratio of surround lighting in following Polarizer 58.
It should be noted that aforesaid prism structure 22,25,59 and 74 is a symmetry structure, yet the present invention is not limited to this, each above-mentioned prism structure can also be an asymmetry structure.In addition, above-mentioned module backlight 14 and 54 is side-light type module backlight, but the present invention do not limit yet and be limited to this, and down straight aphototropism mode set is also applicable to LCD of the present invention.
Compared to prior art, LCD 10 of the present invention (or 50) includes Polarizer 18 (or 58), and following Polarizer 10 (or 50) includes a plurality of prism structures 22 (or 59) in the face of module 14 backlight (or 54), therefore the surround lighting of part can produce reflection within the Polarizer 18 (or 58) down, and then makes this LCD 10 (or 50) can utilize external environment light to come display frame.In other words, LCD of the present invention need not additionally add a semi-penetration plate, just can reach the effect of semi-penetration semi-reflective, so the present invention can reduce the complexity of making LCD, and then can reduce the cost of manufacture of LCD.In addition, increase because surround lighting of the present invention passes through the number of times of Polarizer, so the present invention can promote the contrast effect of LCD.
The above only is the preferred embodiments of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (10)
1. LCD, it includes:
One display panels;
One light source is in order to produce light; And
One first Polarizer is arranged between this display panels and this light source and includes one towards first of this light source, and wherein this first bread contains a plurality of first prism structures.
2. LCD as claimed in claim 1, wherein respectively this first prism structure all includes a symmetry structure or an asymmetry structure.
3. LCD as claimed in claim 2, wherein respectively this first prism structure all includes one first plane and one second plane, and the angle on this first plane and this second plane is between 70 degree and 120 degree.
4. LCD as claimed in claim 3, wherein this first Polarizer includes one in addition towards second of this display panels, this second bread contains a plurality of second prism structures, and respectively this second prism structure all includes one the 3rd plane and Siping City's face, and the 3rd plane and this quadriplanar angle are between 70 degree and 120 degree.
5. LCD as claimed in claim 4, wherein this LCD includes one second Polarizer in addition, and this display panels is between this first Polarizer and this second Polarizer, wherein this first Polarizer is used for selecting the polarized light of a first direction, and this second Polarizer is used for selecting the polarized light of a second direction.
6. LCD as claimed in claim 5, wherein this second Polarizer includes the 3rd and one fourth face with respect to the 3rd in the face of this display panels, and this fourth face includes a plurality of prism structures.
7. LCD as claimed in claim 6, wherein respectively this prism structures all includes one the 5th plane and one the 6th plane, and the angle on the 5th plane and the 6th plane is between 70 degree and 120 degree.
8. LCD as claimed in claim 7; wherein this first Polarizer includes first diaphragm towards this light source; one second diaphragm, and first light polarizing film between this first diaphragm and this second diaphragm towards this display panels.
9. LCD as claimed in claim 8; wherein this second Polarizer includes the 3rd diaphragm towards this display panels; one the 4th diaphragm, and second light polarizing film between the 3rd diaphragm and the 4th diaphragm with respect to the 3rd diaphragm.
10. LCD as claimed in claim 9, wherein those first prism structures are arranged on this first diaphragm, and those second prism structures are arranged on this second diaphragm, and those prism structures are arranged on the 4th diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100476264A CN100346211C (en) | 2004-05-26 | 2004-05-26 | Liquid-crystal display devices |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100476264A CN100346211C (en) | 2004-05-26 | 2004-05-26 | Liquid-crystal display devices |
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| Publication Number | Publication Date |
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| CN1584700A CN1584700A (en) | 2005-02-23 |
| CN100346211C true CN100346211C (en) | 2007-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100476264A Expired - Fee Related CN100346211C (en) | 2004-05-26 | 2004-05-26 | Liquid-crystal display devices |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569368B (en) * | 2015-10-13 | 2019-06-28 | 元太科技工业股份有限公司 | Reflective display and its front optical module |
| CN108681144A (en) * | 2018-06-22 | 2018-10-19 | 亚世光电股份有限公司 | A kind of dynamical half-reflection and half-transmission type liquid crystal display and its critical process |
| CN111564110B (en) * | 2020-05-29 | 2022-07-12 | 上海中航光电子有限公司 | Display panel and display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281556A (en) * | 1997-12-11 | 2001-01-24 | 美国3M公司 | Planar polarizer for LCD projectors |
| CN1315663A (en) * | 2000-03-31 | 2001-10-03 | 富士胶片株式会社 | Polarizing filter protecting film |
| CN1475844A (en) * | 2002-07-22 | 2004-02-18 | 精工爱普生株式会社 | Liquid crystal display device and electronic apparatus |
-
2004
- 2004-05-26 CN CNB2004100476264A patent/CN100346211C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281556A (en) * | 1997-12-11 | 2001-01-24 | 美国3M公司 | Planar polarizer for LCD projectors |
| CN1315663A (en) * | 2000-03-31 | 2001-10-03 | 富士胶片株式会社 | Polarizing filter protecting film |
| CN1475844A (en) * | 2002-07-22 | 2004-02-18 | 精工爱普生株式会社 | Liquid crystal display device and electronic apparatus |
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| CN1584700A (en) | 2005-02-23 |
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