CN203025445U - Liquid crystal display with wide-visual-angle black-white display - Google Patents
Liquid crystal display with wide-visual-angle black-white display Download PDFInfo
- Publication number
- CN203025445U CN203025445U CN 201220587786 CN201220587786U CN203025445U CN 203025445 U CN203025445 U CN 203025445U CN 201220587786 CN201220587786 CN 201220587786 CN 201220587786 U CN201220587786 U CN 201220587786U CN 203025445 U CN203025445 U CN 203025445U
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- China
- Prior art keywords
- liquid crystal
- cellulose acetate
- polaroid
- membrane
- acetate membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides a liquid crystal display with wide-visual-angle black-white display, comprising a liquid crystal panel, an upper polaroid arranged on the upper side of the liquid crystal panel and a lower polaroid arranged on the lower side of the liquid crystal panel, wherein the structure of the upper polaroid is formed by connecting a TAC (triacetyl cellulose) membrane, a polyvinyl alcohol membrane and a TAC membrane with a dual-shaft compensation function in sequence, and the structure of the lower polaroid is formed by connecting the TAC membrane with a dual-shaft compensation function, the polyvinyl alcohol membrane and the TAC membrane in sequence. The TAC membrane is more stable than a COP (cyclo-olefin polymer) membrane in mechanical performance, has better universality and is lower in cost, and as the upper and lower parts of the liquid crystal display adopt the TAC compensation membrane with the same material, the visual display is better.
Description
Technical field
The utility model relates to field of liquid crystal, relates in particular to a kind of liquid crystal display that is applied under negative aobvious (black matrix wrongly written or mispronounced character) pattern.
Background technology
As shown in Figure 1, be polaroid and panel applying application schematic diagram, the LCD box is liquid crystal panel, be PMVA(PMVA-LCD passive-matrix homeotropic liquid crystal display) type, LCD box upside is upper polaroid structure, be followed successively by three cellulose acetate membrane (TAC), polyvinyl alcohol film (PVA), three cellulose acetate membrane (TAC).LCD box downside is lower polaroid structure, is followed successively by poly-cycloolefin film (COP), three cellulose acetate membrane (TAC), polyvinyl alcohol film (PVA), three cellulose acetate membrane (TAC).COP layer band optical compensation function.
The defective of single compensate film (COP layer) is the local light leakage phenomena that occurs under black attitude, shows inequality, and contrast is not high.
The COP mechanical stability is bad, and deformation, final products poor stability easily occur during applying.
The COP purposes is narrow, technique change difficulty during use, and manufacturing cost is high.
The utility model content
In order to solve problem in prior art, the utility model provides the liquid crystal display of a kind of wide visual angle white and black displays, the upper polaroid that it comprises liquid crystal panel and is arranged on the liquid crystal panel upside, and the lower polaroid that is arranged on the liquid crystal panel downside, the structure of upper polaroid is: the three cellulose acetate membrane that connects successively, polyvinyl alcohol film, three cellulose acetate membrane with the biaxial compensation function, the structure of described lower polaroid is: the three cellulose acetate membrane with the biaxial compensation function that connects successively, polyvinyl alcohol film, three cellulose acetate membrane.
As further improvement of the utility model, described liquid crystal panel is the PMVA type.
As further improvement of the utility model, described upper polaroid and lower polaroid be 0～100nm with offset in the face of the three cellulose acetate membrane of biaxial compensation function.
As further improvement of the utility model, the offset Rth with the film thickness direction of the three cellulose acetate membrane of biaxial compensation function of described upper polaroid and lower polaroid is 110～440nm.
As further improvement of the utility model, the direction with the optical axis of the three cellulose acetate membrane of biaxial compensation function of described upper polaroid and lower polaroid becomes 0～90 ° with the direction of polyvinyl alcohol film absorption axes.
As further improvement of the utility model, three cellulose acetate membrane and polyvinyl alcohol film are by the polyvinyl alcohol (PVA) glue laminating.
As further improvement of the utility model, be to fit by pressure sensitive adhesive with three cellulose acetate membrane and the liquid crystal panel of biaxial compensation function.
The beneficial effects of the utility model are: the stability of TAC film mechanical property is better than the COP film, and versatility is better, and cost is low, all adopts up and down the TAC compensate film of identical material because of liquid crystal display, so optics shows better.
Description of drawings
Fig. 1 is that schematic diagram is used in prior art polaroid and panel applying;
Fig. 2 is that schematic diagram is used in the utility model polaroid and panel applying.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As Fig. 2, polaroid and panel are fitted and are used schematic diagram, and the LCD box is liquid crystal panel, be the PMVA type, LCD box upside is upper polaroid structure, is followed successively by three cellulose acetate membrane (TAC), polyvinyl alcohol film (PVA) is with the three cellulose acetate membrane (TAC) of biaxial compensation function.LCD box downside is lower polaroid structure, is followed successively by the three cellulose acetate membrane (TAC) with the biaxial compensation function, polyvinyl alcohol film (PVA), three cellulose acetate membrane (TAC).
The offset of biaxial compensation film, Re are 0～100nm, and Rth is 110～440nm, and the direction of its optical axis becomes 0～90 ° with the direction of PVA absorption axes.Re is offset in face.Rth is the offset of film thickness direction.
As shown in the figure, polaroid described in the utility model divides polaroid and lower polaroid, is fitted in respectively upside and the downside of LCD (Liquid Crystal Display) box.The structure of upper and lower polaroid is three cellulose acetate membrane (TAC) (Triacetyl Cellulose), and polyvinyl alcohol film (PVA film) (polyvinyl alcohol) is with the three cellulose acetate membrane TAC of biaxial compensation function.The TAC film of biaxial compensation function becomes 0 °-90 ° with the absorption axes of PVA film.TAC film and PVA film are all to fit by polyvinyl alcohol glue (PVA glue), are to fit by pressure sensitive adhesive with TAC film side and the LCD box of biaxial compensation function.
The manufacturing of polaroid has two kinds of methods, it is dry and wet way, the manufacture process of wet method is as follows: with (contain iodine (I2) and potassium iodide (KI)) in the swelling in water of polyvinyl alcohol (PVA) (PVA) film, staining trough dyeing, (containing boric acid (H3BO3) and potassium iodide) extension in extension slot, fixation and washing is processed, through oven for drying, and form the PVA polarization matrix layer with polarized light property, as polarisation.
The manufacture process of dry method:
At first under hot environment, utilize the principle that roller speed differs that the PVA film is stretched to required multiple, thereby and then carry out successively the operations such as swelling, dyeing, fixation, oven dry and form the PVA polarization matrix layer with polarized light property, as polarisation.
Then re-using hydrogel (as PVA glue) fits the upper and lower surface of PVA polarization matrix layer and the material of transparency carrier.Its mesoboric acid is played the part of the role of crosslinking chemical, is convenient to dyeing, improves dye uptake.The iodide ion that can prevent from dying in staining trough in the PVA film oozes out in follow-up water-washing process, in order to avoid cause the phenomenon that polarisation fades and make the optical characteristics of polarisation destroyed.
The material of transparency carrier can use the existing thermoplastic resin of industry to be advisable, but high with physical strength,, heigh clarity, thermal stability is good and optics with excellent persons such as tropisms for better.From the consideration to Polarizer optical characteristics and the weatherability such as heat-resisting, wet aspect, best with cellulose triacetate (TAC) film again.
PVA film of the present utility model generally adopts pure water to clean to carry out swelling, so not only can be except surfactants such as the dirt on striping surface and some plastifier, and can also make polyvinyl alcohol film expand to prevent such as the phenomenon such as inhomogeneous that dyes.
The PVA film stretches, very fragile after oven dry, in order to protect the PVA film, thus protective seam on compound on its two sides, as the TAC film, the COP film.
Pressure sensitive adhesive aptly choice for use with the material of the polymkeric substance such as acrylic acid series polymeric compounds, polyester, polycarbamate, polyamide or rubber series as base polymer.Particularly, can preferably use the optical transparence of acrylic adhesive and so on outstanding, show the adhesion characteristic of suitable wetting state, coherency and cementability, at the outstanding material in the aspects such as against weather or thermotolerance.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (7)
1. the liquid crystal display of a wide visual angle white and black displays, it is characterized in that: the upper polaroid that it comprises liquid crystal panel and is arranged on the liquid crystal panel upside, and the lower polaroid that is arranged on the liquid crystal panel downside, the structure of upper polaroid is: the three cellulose acetate membrane that connects successively, polyvinyl alcohol film, with the three cellulose acetate membrane of biaxial compensation function, the structure of described lower polaroid is: the three cellulose acetate membrane with the biaxial compensation function that connects successively, polyvinyl alcohol film, three cellulose acetate membrane.
2. the liquid crystal display of wide visual angle according to claim 1 white and black displays, it is characterized in that: described liquid crystal panel is the PMVA type.
3. the liquid crystal display of wide visual angle according to claim 1 and 2 white and black displays is characterized in that: described upper polaroid and lower polaroid be 0～100nm with offset in the face of the three cellulose acetate membrane of biaxial compensation function.
4. the liquid crystal display of wide visual angle according to claim 1 and 2 white and black displays is characterized in that: the offset Rth with the film thickness direction of the three cellulose acetate membrane of biaxial compensation function of described upper polaroid and lower polaroid is 110～440nm.
5. the liquid crystal display of wide visual angle according to claim 1 and 2 white and black displays is characterized in that: the direction with the optical axis of the three cellulose acetate membrane of biaxial compensation function of described upper polaroid and lower polaroid becomes 0～90 ° with the direction of polyvinyl alcohol film absorption axes.
6. the liquid crystal display of wide visual angle according to claim 1 and 2 white and black displays, it is characterized in that: three cellulose acetate membrane and polyvinyl alcohol film are by the polyvinyl alcohol (PVA) glue laminating.
7. the liquid crystal display of wide visual angle according to claim 1 and 2 white and black displays, it is characterized in that: three cellulose acetate membrane and liquid crystal panel with the biaxial compensation function are to fit by pressure sensitive adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220587786 CN203025445U (en) | 2012-11-09 | 2012-11-09 | Liquid crystal display with wide-visual-angle black-white display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220587786 CN203025445U (en) | 2012-11-09 | 2012-11-09 | Liquid crystal display with wide-visual-angle black-white display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203025445U true CN203025445U (en) | 2013-06-26 |
Family
ID=48649417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220587786 Expired - Lifetime CN203025445U (en) | 2012-11-09 | 2012-11-09 | Liquid crystal display with wide-visual-angle black-white display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203025445U (en) |
-
2012
- 2012-11-09 CN CN 201220587786 patent/CN203025445U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |
|
| CX01 | Expiry of patent term |