CN104216166A - Reflecting display panel, manufacture method thereof and display device - Google Patents
Reflecting display panel, manufacture method thereof and display device Download PDFInfo
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- CN104216166A CN104216166A CN201410470011.6A CN201410470011A CN104216166A CN 104216166 A CN104216166 A CN 104216166A CN 201410470011 A CN201410470011 A CN 201410470011A CN 104216166 A CN104216166 A CN 104216166A
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- liquid crystal
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Abstract
The invention provides a reflecting panel. The reflecting panel comprises a guest-host liquid crystal box, wherein the guest-host liquid crystal box comprises an upper base plate, a lower base plate, and a guest-host liquid crystal layer encapsulated between the upper base plate and the lower base plate; the guest-host liquid crystal layer comprises liquid crystal molecules and dichroic dye molecules; the upper surface of the upper base plate adopts an incident plane for ambient light; the reflecting display panel also comprises a wire grid polarization layer positioned below the guest-host liquid crystal layer; the extending direction of a strip bulge in the wire grid polarization layer is the same with the orientation of the liquid crystal molecules in the guest-host liquid crystal layer. The reflecting display panel can greatly improve the use ratio of the ambient light and improve the display brightness of a corresponding display device.
Description
Technical field
The present invention relates to display technique field, relate in particular to a kind of reflective display panel and preparation method thereof and display device.
Background technology
Reflective display of the prior art, generally add up and down polaroid or at least add polaroid and coordinate compensate film to realize luminescence display in display panel one side at display panel, in such reflective display, because polaroid has filtered out most of polarized light in surround lighting, display brightness is lower.
Summary of the invention
The object of this invention is to provide a kind of display panel of the display brightness that improves reflective display.
In order to achieve the above object, the invention provides a kind of reflective display panel, comprise host and guest's liquid crystal cell, described host and guest's liquid crystal cell comprises upper and lower base plate and is encapsulated in the host and guest's liquid crystal layer between upper and lower base plate, described host and guest's liquid crystal layer comprises liquid crystal molecule and dichroic dye molecule, the plane of incidence that the upper surface of described upper substrate is surround lighting;
Described reflective display panel also comprises the wire grid polarization layer that is positioned at described host and guest's liquid crystal layer below, and in described wire grid polarization layer, the bearing of trend of strip projected parts is identical with the orientation of the liquid crystal molecule in described host and guest's liquid crystal layer.
Preferably, described wire grid polarization layer is formed on described host and guest's liquid crystal cell infrabasal plate.
Preferably, described dichroic dye molecule comprises multiple dichroic dye molecule, the wavelength band difference of the light that different types of dichroic dye molecule absorbs, and the union of the corresponding wavelength band of described multiple dichroic dye molecule covers whole visible light wave range.
Preferably, described multiple dichroic dye molecule specifically comprises dichromatism weld molecule, dichromatism green dye molecules, dichromatic blue dichroic dye molecule.
Preferably, in described wire grid polarization layer, the pitch of strip projected parts is more than or equal to 180nm and is less than or equal to 220nm.
Preferably, also comprise the black absorption layer away from described host and guest's liquid crystal cell one side that is positioned at described wire-grid polarizer.
The present invention also provides a kind of method for making of reflective display panel, comprising:
Host and guest is provided liquid crystal cell, and described host and guest's liquid crystal cell comprises upper and lower base plate and is encapsulated in the host and guest's liquid crystal layer between upper and lower base plate, and described host and guest's liquid crystal layer comprises liquid crystal molecule and dichroic dye molecule, the plane of incidence that the upper surface of described upper substrate is surround lighting;
Wire-grid polarizer is provided, and described wire-grid polarizer comprises substrate and is formed on the wire grid polarization layer on described substrate, and the bearing of trend of the strip projected parts in described wire grid polarization layer is identical with the orientation of the liquid crystal molecule in described host and guest's liquid crystal layer;
Described wire-grid polarizer is arranged on to the below of the infrabasal plate of described host and guest's liquid crystal cell.
Preferably, also comprise:
Below described wire-grid polarizer, make black absorption layer.
The present invention also provides the method for making of another kind of reflective display panel, and the method comprises:
A surface at substrate forms wire grid polarization layer;
Infrabasal plate using described substrate as host and guest's liquid crystal cell is made host and guest's liquid crystal cell, the comprising upper and lower base plate and be encapsulated in the host and guest's liquid crystal layer between upper and lower base plate of the host and guest's liquid crystal cell completing, described host and guest's liquid crystal layer comprises liquid crystal molecule and dichroic dye molecule, the upper surface of described upper substrate is the plane of incidence of surround lighting, and in described wire grid polarization layer, the bearing of trend of strip projected parts is identical with the orientation of the liquid crystal molecule in described host and guest's liquid crystal layer.
Preferably, described method also comprises:
Below described wire grid polarization layer, make black absorption layer.
The present invention also provides a kind of display device, comprises the display panel described in above-mentioned any one.
Reflective display panel provided by the invention, can improve the utilization factor to surround lighting greatly, improves the display brightness of corresponding display device.
Brief description of the drawings
The front elevation of the reflective display panel that Fig. 1 provides for the embodiment of the present invention one in the time not applying electric field;
The left view of the reflective display panel that Fig. 2 provides for the embodiment of the present invention one in the time not applying electric field;
Fig. 3 be in Fig. 1 and 2 in the fundamental diagram of reflective display panel;
The front elevation of the reflective display panel that Fig. 4 provides for the embodiment of the present invention two in the time not applying electric field;
Fig. 5 is the schematic flow sheet of the method for making of a kind of reflective display panel provided by the invention;
Fig. 6 is the schematic flow sheet of the method for making of another kind of reflective display panel provided by the invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
Embodiment mono-
The invention provides a kind of reflective display panel, as depicted in figs. 1 and 2, the method comprises:
Host and guest's liquid crystal cell 1, host and guest's liquid crystal cell comprises 11, infrabasal plate 12, and is encapsulated in liquid crystal molecule 13 and the dichroic dye molecule 14 between upper and lower base plate, liquid crystal molecule 13 and dichroic dye molecule 14 form host and guest's liquid crystal layer; The upper surface of wherein said upper substrate is as the plane of incidence of surround lighting, and the upper surface of upper substrate is towards beholder.
Below described host and guest's liquid crystal cell 1, be provided with wire-grid polarizer 2 (Wire grid polarizer, WGP), this wire-grid polarizer 2 comprises the strip projected parts 22 on substrate 21 and described substrate 21, and the orientation of liquid crystal molecule 13 is identical with the bearing of trend of strip projected parts 22, multiple strip projected parts 22 form wire grid polarization layer.
Understandable, in the present invention, the orientation of the liquid crystal molecule 13 of indication refers to when liquid crystal molecule is not applied to electric field, the direction of the major axis of liquid crystal molecule.Strip projected parts 22 in the present invention in wire-grid polarizer 2 can refer to bonding jumper.In addition, host and guest's liquid crystal cell 1, except comprising above-mentioned host and guest's liquid crystal layer and upper and lower base plate, also should comprise the electrode layer being produced on substrate, and for controlling the selection of liquid crystal molecule, substrate also should be made corresponding alignment films, for liquid crystal molecule is orientated.Upper substrate also may be made color rete, shows for carrying out colour.
Below in conjunction with Fig. 3, the principle of work of reflective display panel provided by the invention is specifically described, as shown in Figure 3, for the region of carrying out dark state demonstration, corresponding region is not applied to electric field, the direction of liquid crystal molecule 13 major axis is identical with the bearing of trend of strip projected parts 22 in wire-grid polarizer 2, and under the effect of liquid crystal molecule 13, the long axis direction of dichroic dye molecule 14 is also identical with the bearing of trend of strip projected parts 22 in wire-grid polarizer 2.Incide in the surround lighting in display panel, the polarization direction polarized light consistent with the long axis direction of liquid crystal molecule 13 and dichroic dye molecule 14 absorbed by dichroic dye molecule 14, the polarization direction light vertical with the long axis direction of dichroic dye molecule 14 with liquid crystal molecule 13 sees through, and according to the reflection characteristic of wire-grid polarizer 2, this part light that sees through host and guest's liquid crystal cell 1 can not reflected by wire-grid polarizer 2, but directly via wire-grid polarizer 2 transmissive, this part region is shown as dark state like this; For the region of carrying out bright state demonstration, apply electric field in corresponding region, now as shown in Figure 3, now liquid crystal molecule 13 drives dichroic dye molecule 14 to rotate to vertical direction (direction of normal to screen) under the effect of electric field, now, the surround lighting inciding in display panel can not absorbed by host and guest's liquid crystal cell 1, all arrive wire-grid polarizer 2, now wire-grid polarizer 2 can be gone out the polarization direction light reflection identical with strip projected parts 22, and this part light is finally for luminescence display; Simultaneously by light transmissive vertical with strip projected parts 22 polarization direction.So just complete the luminescence display of display panel.Can find out, in reflective display panel provided by the invention, the region showing for bright state, 50% light all can be reflected, for carrying out luminescence display.Compare the panel that carries out reflective demonstration with the structure of available technology adopting polaroid and compensate film, greatly improved the utilization factor of light, increased the brightness showing.On the other hand, in reflective panel provided by the invention, polaroid is not set, and wiregrating metal level itself can be produced on any one substrate away from described host and guest's liquid crystal cell one side of host and guest's liquid crystal layer, and the thickness of wiregrating metal level, generally much smaller than the thickness of polaroid, has so just reduced the thickness of display panel on the whole.
As the optional embodiment of one, host and guest's liquid crystal layer 1 can comprise multiple dichroic dye molecule 14; Wherein, the wavelength band difference of the light that different types of dichroic dye molecule 14 absorbs, and the union of multiple dichroic dye molecule 14 corresponding wavelength band covers whole visible light wave range.
In this way, the light of can absorbing polarization direction consistent with long axis of liquid crystal molecule each wave band of host and guest's liquid crystal cell, thus avoid the light leakage phenomena in dark state viewing area.Improve the contrast of display panel.
Further, described multiple dichroic dye molecule 14 specifically comprises dichromatism weld molecule, dichromatism green dye molecules, dichromatic blue dichroic dye molecule.Such host and guest's liquid crystal cell can be good at each wave band light that absorbing polarization direction is consistent with long axis of liquid crystal molecule.
Preferably, in wire-grid polarizer 2, the pitch P of strip projected parts 22 is more than or equal to 180nm and is less than or equal to 220nm.More preferred, the pitch P is here 200nm.
As the optional mode of one, in the specific implementation, can wire-grid polarizer 2 away from described host and guest's liquid crystal cell one side (below of the wire-grid polarizer 2 shown in Fig. 1-3), a black absorption layer 3 is set, see through the light of wire-grid polarizer 2 in order to be absorbed in region that bright state shows.The benefit of doing is like this further to improve the contrast of display device.This black absorption layer 3 can be produced on the lower surface of substrate 21, also can be produced in other layer of structure of wire-grid polarizer 2 belows, in the embodiment of the present invention and following each embodiment, the particular location of black absorption layer is not limited.
Embodiment bis-
The reflective display panel providing from embodiment mono-is different, and as shown in Figure 4, in the embodiment of the present invention two, the strip projected parts 22 that forms wire grid polarization layer is formed on the upper surface of infrabasal plate 12 of host and guest's liquid crystal cell 1.Now, without the substrate that is provided for specially carrying wiregrating polarization layer, further reduce the thickness of whole display panel.
The principle of work of the principle of work of the reflective display panel that embodiment bis-the provides reflective display panel a kind of with embodiment is consistent, is no longer elaborated at this.
Although it is pointed out that shown in embodiment mono-or two to be the situation that wire grid polarization layer is positioned at the upper surface of corresponding substrate, in actual applications, wire grid polarization layer also can be positioned at the lower surface of corresponding substrate.
Embodiment tri-
Embodiment tri-provides a kind of method for making of reflective display panel, can be for the reflective display panel described in making above-described embodiment one, and as shown in Figure 5, the method can comprise:
Step 501, host and guest is provided liquid crystal cell, described host and guest's liquid crystal cell comprises upper and lower base plate and is encapsulated in the host and guest's liquid crystal layer between upper and lower base plate, and described host and guest's liquid crystal layer comprises liquid crystal molecule and dichroic dye molecule, the plane of incidence that the upper surface of described upper substrate is surround lighting.
Step 502, provides wire-grid polarizer, and described wire-grid polarizer comprises substrate and be formed on the wire grid polarization layer on described substrate, and the bearing of trend of the strip projected parts in described wire grid polarization layer is identical with the orientation of the liquid crystal molecule in described host and guest's liquid crystal layer.
Step 503, is arranged on described wire-grid polarizer the below of described host and guest's liquid crystal cell.
The specific implementation process of above-mentioned each step can, with reference to prior art, no longer be elaborated at this.
It is to be noted, in actual applications, step 501 can be exchanged with the order of step 502, and wire-grid polarizer is first provided, host and guest's liquid crystal cell is provided afterwards, and makes the orientation of the liquid crystal molecule in host and guest's liquid crystal cell consistent with the bearing of trend of strip projected parts in wire-grid polarizer.
After step 503, described method can also comprise: below described wire-grid polarizer, make black absorption layer.
Embodiment tetra-
Embodiment tetra-provides a kind of method for making of reflective display panel, can be for the reflective display panel described in making above-described embodiment two, and as shown in Figure 6, the method can comprise
Step 601, forms wire grid polarization layer on a surface of substrate;
Step 602, infrabasal plate using described substrate as host and guest's liquid crystal cell is made host and guest's liquid crystal cell, the comprising upper and lower base plate and be encapsulated in the host and guest's liquid crystal layer between upper and lower base plate of the host and guest's liquid crystal cell completing, described host and guest's liquid crystal layer comprises liquid crystal molecule and dichroic dye molecule, the upper surface of described upper substrate is the plane of incidence of surround lighting, and in described wire grid polarization layer, the bearing of trend of strip projected parts is identical with the orientation of the liquid crystal molecule in described host and guest's liquid crystal layer.
When concrete enforcement, first can complete wire grid polarization layer on infrabasal plate, on upper substrate and/or infrabasal plate, make afterwards alignment films flatness layer, and along the expression in the eyes direction of the strip projected parts of wiregrating polarization layer, alignment films flatness layer is rubbed, inject afterwards liquid crystal molecule and dichroic dye molecule, carry out again, to box encapsulation, forming host and guest's liquid crystal cell.In addition, the upper surface of the upper substrate is here as the plane of incidence of surround lighting.
After step 602, described method can also comprise: below described wire grid polarization layer, make black absorption layer.
The present invention also provides a kind of display device, comprises the display panel described in above-mentioned any one.
The display device here can be: any product or parts with Presentation Function such as Electronic Paper, mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. a reflective display panel, it is characterized in that, comprise host and guest's liquid crystal cell, described host and guest's liquid crystal cell comprises upper and lower base plate and is encapsulated in the host and guest's liquid crystal layer between upper and lower base plate, described host and guest's liquid crystal layer comprises liquid crystal molecule and dichroic dye molecule, the plane of incidence that the upper surface of described upper substrate is surround lighting;
Described reflective display panel also comprises the wire grid polarization layer that is positioned at described host and guest's liquid crystal layer below, and in described wire grid polarization layer, the bearing of trend of strip projected parts is identical with the orientation of the liquid crystal molecule in described host and guest's liquid crystal layer.
2. display panel as claimed in claim 1, is characterized in that, described wire grid polarization layer is formed on described host and guest's liquid crystal cell infrabasal plate.
3. display panel as claimed in claim 1, it is characterized in that, described dichroic dye molecule comprises multiple dichroic dye molecule, the wavelength band difference of the light that different types of dichroic dye molecule absorbs, and the union of the corresponding wavelength band of described multiple dichroic dye molecule covers whole visible light wave range.
4. display panel as claimed in claim 3, is characterized in that, described multiple dichroic dye molecule specifically comprises dichromatism weld molecule, dichromatism green dye molecules, dichromatic blue dichroic dye molecule.
5. display panel as claimed in claim 1, is characterized in that, in described wire grid polarization layer, the pitch of strip projected parts is more than or equal to 180nm and is less than or equal to 220nm.
6. the display panel as described in any one in claim 1 to 5, is characterized in that, also comprises the black absorption layer away from described host and guest's liquid crystal cell one side that is positioned at described wire-grid polarizer.
7. a method for making for reflective display panel, is characterized in that, comprising:
Host and guest is provided liquid crystal cell, and described host and guest's liquid crystal cell comprises upper and lower base plate and is encapsulated in the host and guest's liquid crystal layer between upper and lower base plate, and described host and guest's liquid crystal layer comprises liquid crystal molecule and dichroic dye molecule, the plane of incidence that the upper surface of described upper substrate is surround lighting;
Wire-grid polarizer is provided, and described wire-grid polarizer comprises substrate and is formed on the wire grid polarization layer on described substrate, and the bearing of trend of the strip projected parts in described wire grid polarization layer is identical with the orientation of the liquid crystal molecule in described host and guest's liquid crystal layer;
Described wire-grid polarizer is arranged on to the below of described host and guest's liquid crystal cell.
8. method as claimed in claim 7, is characterized in that, also comprises:
Below described wire-grid polarizer, make black absorption layer.
9. a method for making for reflective display panel, is characterized in that, the method comprises:
A surface at substrate forms wire grid polarization layer;
Infrabasal plate using described substrate as host and guest's liquid crystal cell is made host and guest's liquid crystal cell, the comprising upper and lower base plate and be encapsulated in the host and guest's liquid crystal layer between upper and lower base plate of the host and guest's liquid crystal cell completing, described host and guest's liquid crystal layer comprises liquid crystal molecule and dichroic dye molecule, the upper surface of described upper substrate is the plane of incidence of surround lighting, and in described wire grid polarization layer, the bearing of trend of strip projected parts is identical with the orientation of the liquid crystal molecule in described host and guest's liquid crystal layer.
10. method as claimed in claim 9, is characterized in that, described method also comprises:
Below described wire grid polarization layer, make black absorption layer.
11. 1 kinds of display device, is characterized in that, comprise the display panel as described in claim 1-6 any one.
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| CN201410470011.6A CN104216166A (en) | 2014-09-15 | 2014-09-15 | Reflecting display panel, manufacture method thereof and display device |
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| CN201410470011.6A CN104216166A (en) | 2014-09-15 | 2014-09-15 | Reflecting display panel, manufacture method thereof and display device |
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| CN106773257A (en) * | 2017-01-03 | 2017-05-31 | 京东方科技集团股份有限公司 | Reflective display panel and its manufacture method, display device |
| CN107942574A (en) * | 2017-11-20 | 2018-04-20 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display |
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| EP3733815A1 (en) | 2019-04-29 | 2020-11-04 | Jiangsu Hecheng Display Technology Co., Ltd. | Reflective liquid crystal display device comprising a dye-doped liquid crystal composition |
| US11307439B2 (en) | 2019-05-31 | 2022-04-19 | Shanghai Tianma Micro-electronics Co., Ltd. | Display panel and display device |
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Application publication date: 20141217 |