CN214751211U

CN214751211U - Wide-viewing-angle low-voltage PN type LCD

Info

Publication number: CN214751211U
Application number: CN202121364492.4U
Authority: CN
Inventors: 吴烨盛; 林森; 梁茂财
Original assignee: XIAMEN OCULAR TECHNOLOGY CO LTD
Current assignee: XIAMEN OCULAR TECHNOLOGY CO LTD
Priority date: 2021-06-19
Filing date: 2021-06-19
Publication date: 2021-11-16
Anticipated expiration: 2031-06-19

Abstract

The utility model provides a wide visual angle low voltage PN type LCD to the direction when using is accurate, and from the top down is equipped with in proper order: go up glass substrate, wide visual angle low-voltage PN type structure, lower glass substrate, wide visual angle low-voltage PN type structure from the top down is equipped with in proper order: an upper ITO conductive layer, a reticular cross-linked structure and a lower ITO conductive layer; the reticular cross-linked structure is provided with the following components in sequence from top to bottom: the liquid crystal display comprises an upper orientation layer, a polymerized liquid crystal and a lower orientation layer, wherein the reticular cross-linked structure is sealed by a rubber frame. The utility model discloses a control PN type box thickness to let its netted crosslinked structure of cooperation, make its polymerization respond well, reach three-dimensional network structure, in three-dimensional structure, the wrong definite force of polymer to the liquid crystal is little more than polymer dispersed liquid crystal, forms the low-voltage drive, and realizes wide visual angle bright state and show. The utility model has the advantages of simple structure, realize easily, can realize PN type low-voltage drive moreover, response speed is fast, and joinable drive IC realizes dynamic display, and the practicality is very strong.

Description

Wide-viewing-angle low-voltage PN type LCD

Technical Field

The utility model belongs to the technical field of the LCD technique and specifically relates to a wide visual angle low-voltage PN type LCD.

Background

LCD (short for Liquid Crystal Display), namely, Liquid Crystal Display. The LCD is constructed by placing liquid crystal cells between two parallel glass substrates, arranging TFT (thin film transistor) on the lower substrate glass, arranging color filter on the upper substrate glass, and controlling the rotation direction of liquid crystal molecules by changing the signal and voltage on the TFT, so as to control whether polarized light of each pixel point is emitted or not to achieve the purpose of display.

Divided by physical structure, LCDs generally include the following categories:

TN-LCD: namely twisted nematic LCD liquid crystal displays. Most of LCDs of electronic watches, calculators, game machines, and the like which we commonly see are TN-LCDs. The TN type developing principle is that the liquid crystal material is placed between two pieces of transparent conductive glass attached with an optical axis vertical polarizing plate, and the liquid crystal molecules are attached to the direction of the thin groove of the film and are arranged in sequence by rotation. If the electric field is not formed, light is smoothly emitted from the polarizing plate, and the liquid crystal molecules rotate their traveling directions and then are emitted from the other side. If the two pieces of conductive glass are electrified, an electric field is generated between the two pieces of conductive glass, and the arrangement of liquid crystal molecules between the two pieces of conductive glass is further influenced, so that the molecular rods are twisted, light cannot penetrate through the molecular rods, and a light source is shielded. The phenomenon of dark contrast is thus obtained, called twisted nematic field effect, TNFE (twisted nematic field effect) for short. Liquid crystal displays, which are used in the electronics field, are mostly produced using the principle of twisted nematic field effect. The liquid crystal molecules of the TN twisted nematic field effect rotate incident light by 90 degrees.

STN-LCD: i.e. super twisted nematic LCDs. It is similar to TN-LCD in structure except that its twist angle is not 90 degrees but between 180 and 270 degrees, and although only the twist angle is different, its operation principle is completely different from TN-LCD.

HTN-LCD: i.e. high twist nematic LCD liquid crystal displays. The twist angle of the HTN-LCD is between 100 and 120 degrees, which is between TN-LCD and STN-LCD.

FSTN-LCD: namely, the compensation film super twisted nematic LCD liquid crystal display screen, can overcome the defects of STN-LCD by a layer of specially processed compensation film.

TFT-LCD: i.e. an active matrix LCD of thin film transistors.

Among them, tn (stn) -LCD requires polarizers, so that two layers of polarizers absorb more than 50% of the brightness of light, thereby failing to achieve high brightness display.

With the continuous development of transparent display technology, a Polymer Dispersed (PD) LCD appears on the market, and a polymer scattering liquid crystal is a liquid crystal that utilizes a light scattering phenomenon of a liquid crystal and a polymer, and is developed in response to a reflection type requirement that brightness needs to be improved, and does not need a polarizing plate. When no voltage is applied to the polymer network type (PN), liquid crystal molecules are distributed along the interface of the polymer three-dimensional network structure and are randomly arranged on the whole, and scattering is generated to human light, so that the appearance is dark white. When a voltage is applied, the liquid crystal molecules are aligned in the direction of the electric field, thereby making the appearance transparent.

Common PD type and PN type LCD, form the multi-domain structure through a large amount of polymerized liquid crystal, this kind of structure leads to the product response speed very slow, the contrast is not enough, more importantly can't accomplish low-voltage and wide visual angle, these defects lead to the product can't form the dynamic drive with IC (show drive IC, be the display screen imaging system's the main part, integrated resistance, regulator, parts such as comparator and power transistor, be responsible for drive display and control functions such as drive current), make the market use face very narrow, can't satisfy the use in most fields.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an adopt specific box thickness structure, arrange special netted crosslinked structure technology, make the liquid crystal molecule form three-dimensional crosslinked structure's wide visual angle low voltage PN type LCD to wide visual angle demonstration has been formed.

The technical scheme is as follows:

a wide viewing angle low voltage PN type LCD, based on the direction when using, is equipped with from top to bottom in turn: go up glass substrate, wide visual angle low-voltage PN type structure, lower glass substrate, wide visual angle low-voltage PN type structure from the top down is equipped with in proper order: an upper ITO conductive layer, a reticular cross-linked structure and a lower ITO conductive layer; the reticular cross-linked structure is sequentially provided with: the liquid crystal display comprises an upper orientation layer, a polymerized liquid crystal and a lower orientation layer, wherein the reticular cross-linked structure is sealed by a rubber frame.

Furthermore, the glue frames are sequentially connected with each other through the sealed glue frame and the longitudinal conduction point.

Further, the thickness of wide visual angle low-voltage PN type structure is 2.0um-2.85 um.

Further, the reticular cross-linked structure is composed of an upper orientation layer, polymerized liquid crystal and a lower orientation layer which are polymerized and cured.

Further, the polymerized liquid crystal has a refractive index of 0.210 to 0.250.

Further, the polymer of the polymerized liquid crystal has a functionality of 2.20 to 2.60.

Further, the curing light volume of the polymerized liquid crystal is 6500mj/cm²-7200mj/cm²。

Further, the rubbing angle of the upper alignment layer is 0 to 5 °.

Further, the rubbing angle of the lower alignment layer is 175 ° to 180 °.

Further, the upper orientation layer and the lower orientation layer are respectively printed by nested halftone dot relief printing with side lengths of 10um, 7um, 4um and 2 um.

Has the advantages that:

the utility model discloses a control PN type LCD's box thickness to let its netted crosslinked structure of cooperation, make its polymerization respond well, reach three-dimensional network structure. In the three-dimensional structure, the misfixing force of the polymer to the liquid crystal is much smaller than that of the polymer dispersed liquid crystal, so that low-voltage driving (the minimum can be reduced to 2.5V-3.1V) is realized, and wide-viewing-angle bright-state display is realized.

The utility model has the advantages of simple structure, realize easily, can realize PN type LCD's low-voltage drive moreover, response speed is fast, and joinable drive IC realizes dynamic display, and the practicality is very strong.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a plan view of the present invention;

fig. 2 is a schematic plan structure view of the nested dots of the present invention;

fig. 3 is a schematic plan view of the nested dots of the present invention.

The display device comprises a substrate, a glass substrate, an upper ITO conducting layer, a lower orientation layer, an upper orientation layer, a 6-polymerized liquid crystal, a lower orientation layer, a sealing frame glue and a longitudinal conducting point, wherein the substrate comprises 1-the upper glass substrate, 2-the lower glass substrate, 3-the upper ITO conducting layer, 4-the lower ITO conducting layer, 5-the upper orientation layer, 6-the polymerized liquid crystal, 7-the lower orientation layer, 8-the sealing frame glue and 9-the longitudinal conducting point.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a wide viewing angle low voltage PN type LCD, which is sequentially provided with: an upper glass substrate 1, a wide-view angle low-voltage PN type structure and a lower glass substrate 2.

Specifically, the utility model discloses a wide visual angle low-voltage PN type structure from the top down is equipped with in proper order: an upper ITO conductive layer 3, a reticular cross-linked structure and a lower ITO conductive layer 4.

The reticular cross-linked structure is provided with the following components in sequence from top to bottom: the liquid crystal display panel comprises an upper orientation layer 5, a polymerized liquid crystal 6 and a lower orientation layer 7, wherein the reticular cross-linked structure is sealed by a rubber frame, and the rubber frame is formed by sequentially connecting a sealed frame rubber 8 and a longitudinal conduction point 9.

As an optimized scheme of the utility model, the thickness of wide visual angle low-voltage PN type structure is 2.0um-2.85 um.

In another preferred embodiment of the present invention, the network-like cross-linked structure is formed by polymerizing and curing the upper alignment layer 5, the polymerized liquid crystal 6, and the lower alignment layer 7.

By adopting the structure, the utility model discloses do not need the polaroid can realize showing, not only save the material, product gross thickness also can reduce 0.3mm-0.4 mm.

As a preferred embodiment of the present invention, as shown in fig. 2, in order to make the polymerized liquid crystal 6 form a three-dimensional structure with cross-linked branches in the polymerization process, the utility model designs the nested dots with side lengths of 10um, 7um, 4um and 2um on the upper orientation layer 5 and the lower orientation layer 7. As shown in fig. 3, the nested dots are arrayed at a pitch of 4um, and a gradient upper alignment layer 5 and a gradient lower alignment layer 7 are formed on each nested dot on the upper ITO conductive layer 3 and the lower ITO conductive layer 4 by a relief printing method.

In addition, the upper alignment layer 5 and the lower alignment layer 7 need to be rubbed, and most preferably, the rubbing angle of the upper alignment layer 5 is 0 ° to 5 °, and the rubbing angle of the lower alignment layer 7 is 175 ° to 180 °.

As a preferred scheme of the utility model, the refractive index of the polymerized liquid crystal 6 of the utility model is selected to be 0.210-0.250, the functionality of the polymer is selected to be 2.20-2.60, and the curing light volume is selected to be 6500mj/cm²-7200mj/cm²。

By adopting the structure, the liquid crystal molecules of the polymerized liquid crystal 6 form a three-dimensional cross-linked structure which is a systematized structure formed by branched chain type structures, the driving voltage of the product can be greatly reduced to 2.5V-3.1V at least, and the systematized structure enlarges each visual angle range of the PN type LCD and forms wide visual angle display.

The further embodiments of the present invention disclosed above are merely intended to help illustrate the present invention. Further embodiments are not exhaustive and do not limit the utility model to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A wide viewing angle low voltage PN type LCD is characterized in that, based on the direction when using, from top to bottom, the PN type LCD is provided with: go up glass substrate, wide visual angle low-voltage PN type structure, lower glass substrate, wide visual angle low-voltage PN type structure from the top down is equipped with in proper order: an upper ITO conductive layer, a reticular cross-linked structure and a lower ITO conductive layer; the reticular cross-linked structure is sequentially provided with: the liquid crystal display comprises an upper orientation layer, a polymerized liquid crystal and a lower orientation layer, wherein the reticular cross-linked structure is sealed by a rubber frame.

2. The wide-viewing-angle low-voltage PN type LCD according to claim 1, wherein the seal frames are sequentially connected with each other by a seal frame glue and a longitudinal conduction point.

3. The wide viewing angle low voltage PN type LCD of claim 1, wherein the thickness of the wide viewing angle low voltage PN type structure is 2.0um-2.85 um.

4. The wide viewing angle low voltage PN type LCD of claim 1, wherein the network cross-linked structure is composed of an upper alignment layer, polymerized liquid crystal, and a lower alignment layer which are polymerized and cured.

5. The wide viewing angle low voltage PN type LCD of claim 1, wherein the polymerized liquid crystal has a refractive index of 0.210-0.250.

6. The wide viewing angle low voltage PN type LCD of claim 1, wherein the polymer of the polymerized liquid crystal has a functionality of 2.20-2.60.

7. The wide-viewing-angle low-voltage PN type LCD of claim 1, wherein the curing light volume of the polymerized liquid crystal is 6500mj/cm²-7200mj/cm²。

8. The wide viewing angle low voltage PN type LCD of claim 1, wherein the rubbing angle of the upper alignment layer is 0 ° -5 °.

9. The wide viewing angle low voltage PN type LCD of claim 1, wherein the rubbing angle of the lower alignment layer is 175 ° -180 °.

10. The wide viewing angle low voltage PN type LCD of claim 1, wherein the upper and lower alignment layers are respectively nested dot relief printing with side lengths of 10um, 7um, 4um, 2 um.