Zero-field vertex bistable nematic guest-host dichroic dye liquid crystal display
By introducing liquid crystal dyes and grating structures into liquid crystal displays, the structure of zero-field vertex bistable liquid crystal displays is simplified, solving the problems of high cost and complex processes in existing technologies, and achieving low-cost and high-yield display effects.
Patent Information
- Application Number
- CN202420531183.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-03-19
AI Technical Summary
Existing zero-field vertex bistable nematic liquid crystal displays have complex structures, numerous manufacturing processes, high costs, and low yields.
By employing liquid crystal dyes and grating structures, the arrangement of the liquid crystal dyes is the same as that of liquid crystals, reducing the number of polarizer layers. Combined with the reflection mechanism and electric field, the color display or light reflection of the liquid crystal dyes can be achieved.
It reduced material costs, simplified production processes, improved product yield, and expanded the scope of applications.
Smart Images
Figure CN223808613U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of display, especially to a zero field zenithal bistable display guest host dichroic dye liquid crystal display. BACKGROUND
[0002] Zero field zenithal bistable display (Zenithal Bistable Display) nematic liquid crystal display has the characteristics of zero power consumption display, that is, it can be permanently displayed after power off after refreshing the display picture, and the picture does not flicker, and it also has the characteristics of low power consumption, readable under sunlight, etc. These characteristics can be applied to many scenes, such as electronic labels, electronic books, electronic readers, etc. The existing zenithal bistable liquid crystal display is designed according to the optical principle of nematic liquid crystal. This design must use double-layer polaroid. Figure 7 As shown in the existing zero field zenithal bistable nematic liquid crystal display liquid crystal cell structure diagram, the structure contains two layers of orthogonal polaroid, the lower polaroid is a reflective polaroid, the liquid crystal is horizontally arranged at the lower substrate, and the liquid crystal is vertically arranged at the upper substrate. The arrangement mode is a mixed arrangement mode, which is similar to the traditional TN (twisted nematic) liquid crystal arrangement mode. At this time, due to the optical rotation of the liquid crystal, the liquid crystal display is white background, that is, white display. Figure 8 As shown in the existing zero field zenithal bistable nematic liquid crystal display liquid crystal cell structure diagram, the structure contains two layers of orthogonal polaroid, and the liquid crystal is vertically arranged. The arrangement mode is similar to the traditional VA (vertical alignment) liquid crystal arrangement mode. At this time, due to the optical delay of the liquid crystal, the liquid crystal display is black background, that is, black display. The existing technology has complex structure, multiple production processes, high cost and low yield. UTILITY MODEL CONTENT
[0003] The technical problem to be solved by the utility model is to provide a zero field zenithal bistable display guest host dichroic dye liquid crystal display to solve the above problems.
[0004] The technical solution for solving the above technical problem of the utility model is as follows: a zero field zenithal bistable display guest host dichroic dye liquid crystal display, comprising: liquid crystal, liquid crystal dye, upper substrate, lower substrate, grating and multiple frame glue; the upper substrate is arranged above the lower substrate, the frame glue is arranged between the upper substrate and the lower substrate, the liquid crystal, the liquid crystal dye and the grating are all arranged in the space formed by the upper substrate, the lower substrate and the frame glue, the grating is installed on the lower substrate, the lower substrate is connected with the power supply, and the arrangement mode of the liquid crystal dye is the same as that of the liquid crystal.
[0005] The utility model discloses beneficial effect is: through injecting liquid crystal dye in liquid crystal, and under the electric field, the host-guest characteristic and dichroism characteristic of liquid crystal dye, it is favorable to make liquid crystal dye change with the arrangement change of liquid crystal, and liquid crystal dye can make liquid crystal dye absorb incident light under different arrangement structure, thereby making liquid crystal display the color of liquid crystal dye itself, or make incident light be reflected, thereby display white, or make incident light penetrate lower substrate, thereby transparent display.
[0006] On the basis of the above technical scheme, the utility model still can make improvement as follows.
[0007] Further, the arrangement mode of the liquid crystal and the liquid crystal dye is: vertically arranged or horizontally arranged near one end of the upper substrate, vertically arranged near one end of the lower substrate, and gradually increasing inclined angle arranged in the middle.
[0008] The beneficial effect of the above further scheme is: when the liquid crystal and the liquid crystal dye are vertically arranged, it is favorable to make incident light be reflected, thereby display white, or make incident light penetrate lower substrate, thereby transparent display; when the liquid crystal and the liquid crystal dye are horizontally arranged near one end of the upper substrate, vertically arranged near one end of the lower substrate, and gradually increasing inclined angle arranged in the middle, it is favorable to make liquid crystal dye absorb incident light, thereby making liquid crystal display the color of liquid crystal dye itself.
[0009] Further, it further includes reflection mechanism, and the reflection mechanism is arranged at the bottom end of the lower substrate.
[0010] The beneficial effect of the above further scheme is: the reflection mechanism is favorable to make incident light be reflected when the liquid crystal and the liquid crystal dye are vertically arranged, thereby display white.
[0011] Further, the reflection mechanism is reflective polarizer or white ink or white reflective film.
[0012] The beneficial effect of the above further scheme is: it is favorable to design different optical retardation, and improve the adaptability range of liquid crystal selection.
[0013] Further, the content of the liquid crystal dye in the liquid crystal is 2% to 10%.
[0014] The beneficial effect of the above further scheme is: it is favorable to adjust the content of liquid crystal dye according to display requirement, and then adjust actual display effect. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 The whole structure schematic diagram provided by the embodiment one of the utility model;
[0016] Figure 2 The whole structure schematic diagram provided by the embodiment two of the utility model;
[0017] Figure 3 The whole structure schematic diagram provided by the embodiment three of the utility model;
[0018] Figure 4 The whole structure schematic diagram provided by the embodiment four of the utility model;
[0019] Figure 5 The whole structure schematic diagram provided by the embodiment five of the utility model;
[0020] Figure 6 The whole structure schematic diagram provided by the embodiment six of the utility model;
[0021] Figure 7 The structure schematic of prior art Figure 1 ;
[0022] Figure 8 The structure schematic of prior art Figure 2 .
[0023] Wherein, Figures 1 to 6 The arrow in the figure indicates the path of light, Figures 1 to 8 The double-headed arrow in the figure indicates the installation orientation of the lower substrate.
[0024] In the drawings, the component list represented by each sign is as follows:
[0025] 1, liquid crystal; 2, liquid crystal dye; 3, upper substrate; 4, lower substrate; 5, grating; 6, frame glue; 7, reflecting mechanism. Specific implementation
[0026] The principle and features of the utility model are described below, and the examples are only used to explain the utility model, and are not used to limit the scope of the utility model.
[0027] As Figures 1 to 6As shown, a zero-field vertex bistable nematic phase-host bidirectional dye liquid crystal display includes: liquid crystal 1, liquid crystal dye 2, upper substrate 3, lower substrate 4, grating 5, and multiple frame adhesives 6; the upper substrate 3 is disposed above the lower substrate 4, the frame adhesives 6 are disposed between the upper substrate 3 and the lower substrate 4, the liquid crystal 1, the liquid crystal dye 2, and the grating 5 are all disposed in the space formed by the upper substrate 3, the lower substrate 4, and the frame adhesives 6, the grating 5 is mounted on the lower substrate 4, the lower substrate 4 is connected to a power source, and the arrangement of the liquid crystal dye 2 is the same as that of the liquid crystal 1.
[0028] It should be noted that: host-guest dichroism refers to the characteristic that the liquid crystal dye 2 can dissolve well into the liquid crystal 1 without affecting the performance of the liquid crystal 1. After dissolving into the liquid crystal 1, the liquid crystal dye 2 molecules have good linearity and can maintain a parallel alignment with the liquid crystal 1 molecules. When the liquid crystal 1 molecules change their alignment under the action of an electric field, the liquid crystal dye 2 will change along with the liquid crystal 1 molecules. The liquid crystal dye 2 also has a high dichroism ratio (≥10), a high extinction coefficient (≥0.3), high solubility (≥5%), and high impedance (≥10). 10 It has high stability and good color panorama; at the same time, the liquid crystal dye 2 can be synthesized into different colors according to different requirements, such as yellow, blue, black, etc.; the liquid crystal dye 2 is generally divided into two categories: azo dyes and anthraquinone derivatives.
[0029] The beneficial effects of this invention are as follows: By injecting liquid crystal dye into the liquid crystal, and under the influence of an electric field, the host-guest characteristics of the liquid crystal dye, and its dichroic properties, the liquid crystal dye can change with the arrangement of the liquid crystal. Under different arrangement structures, the liquid crystal dye can absorb incident light, thus displaying the color of the liquid crystal dye itself; or it can reflect the incident light, thus displaying white; or it can allow the incident light to penetrate the lower substrate, thus displaying transparently. Compared to existing zero-field bistable liquid crystal displays, this invention eliminates at least one polarizer layer, reducing material costs and production processes, thereby lowering production costs and indirectly improving yield. Furthermore, depending on the application requirements, a polarizer can be omitted, expanding the product's application range.
[0030] Preferred, such as Figures 1 to 6 As shown, the liquid crystal 1 and the liquid crystal dye 2 are arranged as follows: they are arranged vertically or horizontally near one end of the upper substrate 3, and vertically near one end of the lower substrate 4, with the middle part arranged at a gradually increasing tilt angle.
[0031] The beneficial effect of the above preferred scheme is that when the liquid crystal and the liquid crystal dye are vertically arranged, the incident light is reflected, thereby displaying white color, or the incident light penetrates the lower substrate, thereby transparently displaying.
[0032] Preferably, as shown in the figure, the liquid crystal 1 and the liquid crystal dye 2 are arranged in a manner that one end close to the upper substrate 3 is horizontally arranged, one end close to the lower substrate 4 is vertically arranged, and the middle is arranged in a gradually increasing inclined angle. Figures 1 to 4 Preferably, as shown in the figure, the liquid crystal 1 and the liquid crystal dye 2 are arranged in a manner that one end close to the upper substrate 3 is horizontally arranged, one end close to the lower substrate 4 is vertically arranged, and the middle is arranged in a gradually increasing inclined angle.
[0033] The beneficial effect of the above preferred scheme is that when the liquid crystal and the liquid crystal dye are vertically arranged, the incident light is reflected, thereby displaying white color.
[0034] Preferably, the reflecting mechanism 7 is a reflective polarizer or white ink or white reflective film.
[0035] The beneficial effect of the above preferred scheme is that it is beneficial to design different optical retardation, thereby improving the adaptability range of liquid crystal selection.
[0036] Preferably, the content of the liquid crystal dye 2 in the liquid crystal 1 is 2% to 10%.
[0037] The beneficial effect of the above preferred scheme is that it is beneficial to adjust the content of the liquid crystal dye according to the display requirement, thereby adjusting the actual display effect.
[0038] The utility model will be further described through several embodiments as follows:
[0039] Embodiment one.
[0040] Preferably, as shown in the figure, the liquid crystal 1 and the liquid crystal dye 2 are arranged in a manner that one end close to the upper substrate 3 is horizontally arranged, one end close to the lower substrate 4 is vertically arranged, and the middle is arranged in a gradually increasing inclined angle. Figure 1 Under the action of the electric field, due to the guest-host feature and dichroism feature of the liquid crystal dye 2, the liquid crystal dye 2 is arranged in the same manner as the liquid crystal 1, at this time, due to the light absorption characteristics of the liquid crystal dye 2, the light incident to the liquid crystal 1 is absorbed by the liquid crystal dye 2, at this time, the liquid crystal 1 displays the color of the liquid crystal dye 2 itself.
[0041] Embodiment two.
[0042] Preferably, as shown in the figure, the liquid crystal 1 and the liquid crystal dye 2 are arranged in a manner that one end close to the upper substrate 3 is horizontally arranged, one end close to the lower substrate 4 is vertically arranged, and the middle is arranged in a gradually increasing inclined angle. Figure 2As shown, the liquid crystal 1 and liquid crystal dye 2 are arranged vertically; the reflection mechanism 7 is a reflective polarizer. Under the action of an electric field, due to the host-guest characteristics and dichroism of the liquid crystal dye 2, the liquid crystal dye 2 is also arranged in the same way as the liquid crystal 1. At this time, since most of the liquid crystal dye 2 is vertically arranged, the light incident on the liquid crystal 1 is not absorbed by the liquid crystal dye 2, but is reflected by the reflective polarizer, thus displaying a white background, i.e., a white display.
[0043] Example 3.
[0044] like Figure 3 As shown, the liquid crystal 1 and liquid crystal dye 2 are arranged horizontally at one end near the upper substrate 3 and vertically at the other end near the lower substrate 4, with a gradually increasing tilt angle in the middle; the reflective mechanism 7 is white ink or white reflective film. Under the action of an electric field, due to the host-guest characteristics and dichroism of the liquid crystal dye 2, the liquid crystal dye 2 is also arranged in the same way as the liquid crystal 1. At this time, since most of the liquid crystal dye 2 is in a horizontal or tilted arrangement, the light absorption characteristics of the liquid crystal dye 2 cause the light incident on the liquid crystal 1 to be absorbed by the liquid crystal dye 2, and the liquid crystal 1 displays the color of the liquid crystal dye 2 itself.
[0045] Example 4.
[0046] like Figure 4 As shown, the liquid crystal 1 and liquid crystal dye 2 are arranged vertically; the reflective mechanism 7 is white ink or white reflective film. Under the action of an electric field, due to the host-guest characteristics and dichroism of the liquid crystal dye 2, the liquid crystal dye 2 is also arranged in the same way as the liquid crystal 1. At this time, since most of the liquid crystal dye 2 is vertically arranged, the light incident on the liquid crystal 1 is not absorbed by the liquid crystal dye 2, but is reflected by the reflective polarizer, thus displaying a white background, i.e., a white display.
[0047] Example 5.
[0048] like Figure 5 As shown, the liquid crystal 1 and liquid crystal dye 2 are arranged horizontally near the upper substrate 3 and vertically near the lower substrate 4, with a gradually increasing tilt angle in the middle, and no reflection mechanism 7 is provided. Under the action of an electric field, due to the host-guest characteristics and dichroism of the liquid crystal dye 2, the liquid crystal dye 2 also arranges itself in the same way as the liquid crystal 1. At this time, since most of the liquid crystal dye 2 is in a horizontal or tilted arrangement, the light absorption characteristics of the liquid crystal dye 2 cause the light incident on the liquid crystal 1 to be absorbed by the liquid crystal dye 2, and the liquid crystal 1 displays the color of the liquid crystal dye 2 itself.
[0049] Example 6.
[0050] like Figure 6As shown, the arrangement of liquid crystal 1 and liquid crystal dye 2 is vertically arranged, and no reflection mechanism 7 is arranged. Under the action of the electric field, due to the guest-host characteristics and dichroism characteristics of the liquid crystal dye 2, the liquid crystal dye 2 is also arranged according to the arrangement of the liquid crystal 1, at this time, due to the fact that most of the liquid crystal dye 2 is in vertical arrangement, the light incident to the liquid crystal 1 is not absorbed by the liquid crystal dye 2, and the light passes through the lower substrate 4, at this time, the transparent bottom is displayed, that is, transparent display.
[0051] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0052] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0053] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0054] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0055] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.
[0056] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A zero field zenithal bistable nematic guest-host dichroic dye liquid crystal display, characterized in that, Include: Liquid crystal (1), liquid crystal dye (2), upper substrate (3), lower substrate (4), grating (5) and multiple frame glue (6); The upper substrate (3) is arranged above the lower substrate (4), the frame glue (6) is arranged between the upper substrate (3) and the lower substrate (4), the liquid crystal (1), the liquid crystal dye (2) and the grating (5) are arranged in the space formed by the upper substrate (3), the lower substrate (4) and the frame glue (6), the grating (5) is installed on the lower substrate (4), the lower substrate (4) is connected with the power supply, the arrangement mode of the liquid crystal dye (2) is same with the arrangement mode of the liquid crystal (1); The arrangement mode of the liquid crystal (1) and the liquid crystal dye (2) is vertically arranged, which is used for making incident light be reflected, so as to display white color, or making incident light penetrate the lower substrate (4), so as to transparently display, or close to one end of the upper substrate (3) is horizontally arranged, close to one end of the lower substrate (4) is vertically arranged, and the middle is arranged with gradually increasing inclined angle, which is used for making the liquid crystal dye (2) absorb incident light, so as to make the liquid crystal (1) display the color of the liquid crystal dye (2) itself.
2. A zero-field zenithal bistable nematic guest-host dichroic dye liquid crystal display according to claim 1, characterized in that, Further include reflection mechanism (7), the reflection mechanism (7) is arranged at the bottom end of the lower substrate (4).
3. A zero-field zenithal bistable nematic guest-host dichroic dye liquid crystal display according to claim 2, characterized in that, The reflection mechanism (7) is reflective polarizer or white ink or white reflective film.