CN211123553U - Mirror display device - Google Patents
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- CN211123553U CN211123553U CN201922001724.9U CN201922001724U CN211123553U CN 211123553 U CN211123553 U CN 211123553U CN 201922001724 U CN201922001724 U CN 201922001724U CN 211123553 U CN211123553 U CN 211123553U
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Abstract
The utility model belongs to the technical field of show, a mirror surface display device is related to. The device is including the first polaroid that sets gradually, the reflector layer of reflection certain polarization direction light, if: a metal wire grid polarizer, a brightness enhancement film in an APCF polarizer, a first substrate, a liquid crystal layer, a second substrate, and a second polarizer. Using a reflective layer that reflects light of a certain polarization direction, such as: the brightness enhancement film in the metal wire grid polarizer and the APCF polarizer replaces a half-penetration half-reflection film, and the reflectivity can be doubled. Ordinary LCD commonly used at present carries out special collocation with the reflection stratum among this utility model and forms mirror surface display device, simple structure, and is compatible with traditional preparation technology, and the cost is lower.
Description
Technical Field
The utility model belongs to the technical field of show, a mirror surface display device is related to.
Background
Display devices can be classified into transmissive display devices, reflective display devices, and mirror display devices according to the source of light used to display a picture. Specifically, the light source of the transmissive display device is a backlight module, and the contrast of the display image is reduced outdoors or under strong light; the light source of the reflective display device is an external light source, which has better display effect outdoors and under strong light, but it is difficult to obtain a display picture with high resolution, high contrast and high color quality; the light source of the mirror display device is a backlight module and an external light source, and the problems of a transmission display device and a reflection display device can be effectively solved.
Mirror display is a new display technology that has emerged in recent years, and can display images as well as reflect pictures to be used as mirrors. The intelligent mirror is mainly applied to displaying news key points, weather forecast, calendar, mails, social networks, reminding and other information, and knowing daily information while looking into the mirror, so that the quality of life is really improved through an intelligent technology. The mirror display panel is structurally characterized in that a semi-transparent semi-reflective film is arranged on an existing liquid crystal display panel, and the semi-transparent semi-reflective film can enable a user to see pictures such as weather conditions or real-time news of the day from a mirror surface while using a mirror. The main realization mode of the mirror display device is realized by attaching a half-through half-reflecting polyethylene terephthalate (PET) film or sputtering a half-through half-reflecting metal film on the light-emitting side of the liquid crystal display panel.
For the transflective film structure, due to the influence of the transflective film, the transmittance of the liquid crystal display panel is halved after passing through the transflective film, the reflectance of the ambient light is halved, and the glare phenomenon is generated when the ambient light is strong.
And a phase delay liquid crystal box and an auxiliary polaroid are arranged on the basis of the semi-penetration semi-reflection film mirror surface display structure, so that the transmittance and the reflectivity of the liquid crystal display structure can be adjusted, and the liquid crystal display structure has a local mirror function and a local display function. The disadvantage is that the device is complex and heavy, requiring two liquid crystal cells. In addition, due to the influence of the transflective film, the transmittance of the liquid crystal display panel is halved after passing through the transflective film, the reflectance of ambient light is halved, and the transmittance and the reflectance are lower due to the influence of the phase retardation liquid crystal box.
The mirror surface display base plate in addition on be formed with the reflecting area and the penetration region of repeated arrangement in proper order, the first control unit of the first substrate base plate of mirror surface display base plate, reflecting layer and second control unit penetration region, be formed with reflecting area and penetration region, be provided with the reflecting layer in the reflecting area, reflecting area and penetration region are controlled respectively through first control unit and second control unit, make picture display and mirror surface display no longer go on simultaneously, the influence of the light of reflection when having avoided mirror surface display to picture display. The disadvantages are complex manufacturing process, half of each pixel is reflected and projected, and the resolution is reduced.
Disclosure of Invention
The utility model aims at the problems of complex structure, heavy weight, complex process and higher manufacturing cost of the traditional mirror display device; and in the prior art, the reflectivity is reduced by half due to the influence of the transflective film, and then the influence of an 1/4 wave plate or other additional devices is considered, so that the device has the problem that the mirror reflectivity is further reduced compared with the prior art, and a novel mirror display device is provided.
In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:
the device comprises a first polarizer, a reflecting layer (such as a metal wire grid polarizer and a brightness enhancement film in an APCF (active light control filter) polarizing plate) for reflecting light in a certain polarization direction, a first substrate (containing a TFT (thin film transistor) array), a liquid crystal layer, a second substrate (containing a color film) and a second polarizer, which are sequentially arranged, as shown in figure 1.
The working principle of mirror function realization: the environment natural light enters the device through the polaroid to form polarized light, and the polarized light returns to the polaroid through the reflecting layer by virtue of reflection of the reflecting layer, so that the mirror surface function is realized.
The working principle of the display function implementation is as follows: the brightness change is realized by the liquid crystal molecules under the driving of an electric field.
Preferably, the liquid crystal device of this technique can adopt an IPS mode, an FFS mode, a VA mode, and a TN mode.
The working principle of the metal wire grid polarizer is as follows: a metal wire-grid polarizer can selectively transmit TM polarized light components (polarization direction perpendicular to the wire grid direction, i.e., p light) and reflect TE polarized light components (polarization direction parallel to the wire grid direction, i.e., s light), as shown in fig. 2.
Preferably, the working principle of the brightness enhancement film in the APCF polarizer is that the brightness enhancement film is prepared by using a multilayer film, and the brightness enhancement film can realize the same functions as the metal wire grid polarizer.
Preferably, the reflective layer may be attached to the first polarizer to form a composite film, and in the metal wire grid polarizer technology, the reflective layer may be directly formed on the outer surface of the first substrate, or may be formed on the inner surface of the first substrate, i.e., between the substrate and the TFT array.
The technical requirements are as follows:
the polarization direction of the reflected light of the reflecting layer is the same as the direction of the transmission axis of the first polaroid, namely the polarization direction of the transmission of the reflecting layer is vertical to the direction of the transmission axis of the first polaroid.
In the IPS, FFS or VA display mode, the liquid crystal layer of the liquid crystal is required to have a thickness of 1/2 wavelengths, which is equivalent to a half-wave plate, and the wavelength is selected in the visible light range, and generally, the wavelength of the green light wave to which the human eye is sensitive is preferably selected.
The utility model provides a liquid crystal display device preparation technology is compatible with L CD preparation technology, transparent glass substrate or transparent plastic substrate can be adopted to wherein base plate, generally under the condition that does not influence the device performance, select more frivolous base plate, thickness like glass can be between 0.1 ~ 0.4mm, TFT (thin film transistor) array on the base plate, various membrane preparation is the same with L CD technology, do not describe here in detail, glue seals around the two-layer glass, the centre is the liquid crystal layer, the thickness of liquid crystal layer is generally 2 ~ 5um, the base plate surface coating who contacts with the liquid crystal has organic orientation layer (generally for polyimide class material)) Generally, the rubbing or photo-alignment technique aligns the liquid crystal molecules in the desired direction; the metal wire grid polarizer is formed by nanoimprint lithography and physical vapor deposition, or by conventional etching method, and the metal layer can be selectively plated with silver, aluminum, name, or TiO2The working principle of the brightness enhancement film in the APCF polarizing plate is that the brightness enhancement film is prepared by adopting a multilayer film, and the thickness of the brightness enhancement film is dozens of microns.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
1. the reflectivity can be doubled by using a reflective layer (such as a metal wire grid polarizer, a brightness enhancement film in an APCF polarizer) to reflect light in a certain polarization direction instead of a transflective film.
2. Ordinary LCD commonly used at present carries out special collocation with the reflection stratum among this utility model and forms mirror surface display device, simple structure, and is compatible with traditional preparation technology, and the cost is lower.
Drawings
Fig. 1 is a schematic view of a mirror display device structure.
Fig. 2 is a schematic diagram of the operation of a metal wire grid polarizer.
FIG. 3 is a schematic view of a structure of IPS or FFS mode mirror display.
FIG. 4 is a cross-sectional view of a structure of an IPS or FFS mode mirror display device.
FIG. 5 is a schematic view of a structure of IPS or FFS mode mirror display.
FIG. 6 is a schematic view of a structure of IPS or FFS mode mirror display.
FIG. 7 is a schematic view of a structure of an IPS or FFS mode mirror display.
FIG. 8 is a schematic view of a VA mode mirror display structure.
FIG. 9 is a schematic view of a VA mode mirror display structure.
FIG. 10 is a schematic view of a TN mode mirror display structure.
FIG. 11 is a schematic view of a TN mode mirror display structure.
The reference numbers are 1 first substrate, 2 first polaroid, 3 second substrate, 4 second polaroid, 5 liquid crystal layer, 6 reflecting layer, 7 direction of transmission axis of second polaroid, 8 direction of reflected light polarization and 9 direction of transmission axis of first polaroid.
Detailed Description
In order that the above objects, features and advantages of the present invention may be more clearly understood, the present invention will be further described with reference to specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.
The embodiment is described by taking a metal wire grid polarizer as an example, and the principle of using the brightness enhancement film in the APCF polarizer as a reflective layer is similar to that of the metal wire grid polarizer.
The device comprises a first polarizer 2, a reflecting layer 6 (such as a metal wire grid polarizer and a brightness enhancement film in an APCF (active light control) polarizer) for reflecting light in a certain polarization direction, a first substrate 1 (containing a TFT (thin film transistor) array), a liquid crystal layer 5, a second substrate 3 (containing a color film) and a second polarizer 4 which are sequentially arranged, as shown in figure 1.
Example 1, as shown in figure 3. The long axis direction of the liquid crystal molecules is along the direction of the y axis, the transmission axes of the first polarizer 2 and the second polarizer 4 are along the direction of the x axis, and the polarization direction of the reflected light of the reflecting layer 6 is the same as the direction 7 of the transmission axis of the second polarizer, namely the polarization direction of the transmission of the reflecting layer 6 is vertical to the direction 9 of the transmission axis of the first polarizer. The working principle is as follows: when no electric field is applied, the ambient natural light incident to the device is linearly polarized after passing through the second polarizer 4, and in this state, the polarization direction is not changed, and the light is directly emitted after being reflected by the reflective layer 6, thereby realizing the mirror function, as shown in fig. 4.
When the average optical axis (director) of the liquid crystal forms an angle of 45 degrees with the y axis, the liquid crystal layer 5 at this time is equivalent to 1/2 wave plates, natural ambient light incident to the device is linearly polarized after passing through the first polarizer 2, when reaching the reflective layer 6 (metal wire grid polarizer), the linearly polarized light still passes through one 1/2 wave plate, but the linear polarization direction is rotated by 90 degrees, namely, along the y axis, the polarization direction is consistent with the polarization direction of transmitted light of the reflective layer at this time, the transmitted light is completely absorbed by the first polarizer 2 through the reflective layer, and the dark state is presented.
When the average optical axis (director) of the liquid crystal and the y axis form an angle theta (between 0 and 45 degrees), the natural ambient light entering the device passes through the first polarizer 2 to form linearly polarized light, and when reaching the reflecting layer 6 (metal wire grid polarizer), the linearly polarized light still passes through an 1/2 wave plate, but the linearly polarized direction is changed by an angle 2 theta, namely the included angle with the x axis is 2 theta, the component of the linearly polarized light in the y axis direction is absorbed by the reflecting layer, the component of the linearly polarized light in the x axis direction passes through the reflecting layer 6, and after passing through the liquid crystal layer 5, the linearly polarized light still passes through a 1/2 wave plate, but the linearly polarized direction of the component in the x axis direction is changed by an angle 2 theta, namely the included angle with the x axis is 2 theta, and the component of the linearly polarized light in the y axis direction is absorbed by the second polarizer, the component of the linearly polarized light in the x-axis direction is transmitted through the second polarizing plate and exits the display device, forming a gray state.
The change from a bright state to a gray state to a dark state, the emergent light intensity and cos can be realized by controlling the voltage4And (2) is in direct proportion, so that the display function is realized, and information such as news key points, weather forecasts, calendars, mails, social networks, reminders and the like is displayed.
Example 2: the direction of the transmission axis of the second polarizer in example 1 was changed to the y-axis direction, as shown in fig. 4. The long axis direction of the liquid crystal molecules is along the direction of the y axis, the transmission axis of the first polaroid is along the direction of the x axis, and the polarization direction of the reflected light of the reflecting layer is vertical to the transmission axis direction of the second polaroid.
The working principle is as follows:
when no electric field is applied, ambient natural light incident to the device passes through the second polarizer 4 to form linearly polarized light, the polarization direction is not changed in the state, the polarization direction is the same as the polarization direction of transmitted light of the reflecting layer, and the linearly polarized light is absorbed by the first polarizer 2 after passing through the reflecting layer 6 to realize a dark state.
When an electric field is applied to drive the liquid crystal molecules, when the average optical axis (director) of the liquid crystal is at an angle of 45 degrees to the y-axis, the liquid crystal at this time is equivalent to 1/2 wave plate, and when the ambient natural light incident to the device passes through the first polarizer to form linearly polarized light and reaches the reflecting layer 6 (metal wire grid polarizer), which is equivalent to passing through an 1/2 wave plate, is still linearly polarized light, but the linear polarization direction is rotated by 90 degrees, i.e., along the x-axis, where the polarization direction coincides with the polarization direction of the reflected light from the reflective layer, is completely reflected, this linearly polarized light passes through the liquid crystal layer 5, which again corresponds to an 1/2 wave plate, still being linearly polarized light, however, the linear polarization direction is rotated by 90 degrees, the polarization direction of the linearly polarized light reaching the second polarizer 4 is identical to the transmission axis direction of the second polarizer 4, and the linearly polarized light is completely emitted, and the state is a mirror mode.
When the average optical axis (director) of the liquid crystal and the y axis form an angle theta (between 0 and 45 degrees), the natural ambient light entering the device passes through the first polarizer 2 to form linearly polarized light, and when reaching the reflecting layer 6 (metal wire grid polarizer), the linearly polarized light still passes through an 1/2 wave plate, but the linearly polarized direction is changed by an angle 2 theta, namely the included angle with the y axis is 2 theta, the component of the linearly polarized light in the y axis direction is absorbed by the reflecting layer, the component of the linearly polarized light in the x axis direction passes through the reflecting layer 6, and after passing through the liquid crystal layer 5, the linearly polarized light still passes through a 1/2 wave plate, but the linearly polarized direction of the component in the x axis direction is changed by an angle 2 theta, namely the included angle with the x axis is 2 theta, and the component of the linearly polarized light in the x axis direction is absorbed by the second polarizer, the component of the linearly polarized light in the y-axis direction is transmitted through the second polarizing plate and exits the display device, forming a gray state.
The change from a bright state to a gray state to a dark state, the emergent light intensity and sin can be realized by controlling the voltage4(2 x theta) is in direct proportion, realizes the display function, and displays news key points, weather forecast, calendar and mailsPieces, social networks, reminders, etc.
Example 3: the direction of the alignment of the liquid crystals in example 1 was changed to a direction at an angle of 45 degrees to the y-axis as shown in fig. 6.
The working principle is as follows:
when the electric field is not applied, the magnetic field is not applied,
when no electric field is applied, when the optical axis (director) of the liquid crystal molecule forms an angle of 45 degrees with the y-axis, the liquid crystal at this time is equivalent to 1/2 wave plates, the ambient natural light incident to the device, linearly polarized light formed after passing through the first polarizer 2, and when reaching the reflective layer (metal wire grid polarizer), the liquid crystal still is linearly polarized light after passing through a 1/2 wave plate, but the linear polarization direction is rotated by 90 degrees, namely along the y-axis direction, at this time, the polarization direction is consistent with the polarization direction of the transmitted light of the reflective layer, and the transmitted light completely penetrates through the reflective layer and is absorbed by the first polarizer, and the dark state is presented.
When an electric field is applied, when the average optical axis (director) of the liquid crystal is parallel to the y axis, the ambient natural light incident to the device is linearly polarized after passing through the second polarizer, and in the state, the polarization direction is not changed, and the light is directly emitted after being reflected by the reflecting layer, so that the mirror function is realized, and the state is also the brightest state of the display function.
When the average optical axis (director) of the liquid crystal and the y axis form an angle theta (between 0 and 45 degrees), the natural ambient light entering the device passes through the first polarizer 2 to form linearly polarized light, and when reaching the reflecting layer 6 (metal wire grid polarizer), the linearly polarized light still passes through an 1/2 wave plate, but the linearly polarized direction is changed by an angle 2 theta, namely the included angle with the x axis is 2 theta, the component of the linearly polarized light in the y axis direction is absorbed by the reflecting layer, the component of the linearly polarized light in the x axis direction passes through the reflecting layer 6, and after passing through the liquid crystal layer 5, the linearly polarized light still passes through a 1/2 wave plate, but the linearly polarized direction of the component in the x axis direction is changed by an angle 2 theta, namely the included angle with the x axis is 2 theta, and the component of the linearly polarized light in the y axis direction is absorbed by the second polarizer, the component of the linearly polarized light in the x-axis direction is transmitted through the second polarizing plate and exits the display device, forming a gray state.
By controlling the voltageCan realize the change from a bright state to a gray state to a dark state, the emergent light intensity and cos4And (2) is in direct proportion, so that the display function is realized, and information such as news key points, weather forecasts, calendars, mails, social networks, reminders and the like is displayed.
Example 4: the direction of the alignment of the liquid crystal in example 2 was changed to a direction at an angle of 45 degrees to the y-axis as shown in fig. 7.
The working principle is as follows:
when the liquid crystal molecules are driven without applying an electric field, when the optical axis (director) of the liquid crystal is at an angle of 45 degrees to the y-axis, the liquid crystal at this time is equivalent to 1/2 wave plate, and when the ambient natural light incident to the device passes through the first polarizer to form linearly polarized light and reaches the reflecting layer 6 (metal wire grid polarizer), which is equivalent to passing through an 1/2 wave plate, is still linearly polarized light, but the linear polarization direction is rotated by 90 degrees, i.e., in the direction along the x-axis, where the polarization direction coincides with the polarization direction 8 of the reflected light from the reflective layer, is completely reflected, this linearly polarized light passes through the liquid crystal layer 5, which again corresponds to an 1/2 wave plate, still being linearly polarized light, but the linear polarization direction is rotated by 90 degrees, the polarization direction of the linearly polarized light reaching the second polarizer is consistent with the transmission axis direction of the second polarizer, and the linearly polarized light is completely emitted, and the state is a mirror mode.
When an electric field is applied, when the optical axis (director) of the liquid crystal is parallel to the y axis, the environment natural light entering the device is linearly polarized after passing through the second polarizer, under the state, the polarization direction is not changed, the polarization direction is the same as the polarization direction of the transmission light of the reflecting layer, and the transmission light passes through the reflecting layer and is absorbed by the first polarizer to realize a dark state.
When the average optical axis (director) of the liquid crystal and the y axis form an angle theta (between 0 and 45 degrees), the natural ambient light entering the device passes through the first polarizer to form linearly polarized light, and when reaching the reflecting layer 6 (metal wire grid polarizer), the linearly polarized light still passes through an 1/2 wave plate, but the linearly polarized direction is still linearly polarized light, namely the angle with the y axis is 2 theta, the component of the linearly polarized light in the y axis direction is absorbed by the reflecting layer, the component of the linearly polarized light in the x axis direction passes through the reflecting layer, and after passing through the liquid crystal layer 5, the linearly polarized light still passes through a 1/2 wave plate, but the linearly polarized direction of the component in the x axis direction is still linearly polarized light, but the linearly polarized direction of the component in the x axis direction is changed by the angle of 2 theta, namely the angle with the x axis is 2 theta, and the component of the linearly polarized light in the x axis direction is absorbed by the second, the component of this linearly polarized light in the y-axis direction is transmitted through the second polarizing plate 4 and exits the display device, forming a gray state.
The change from a bright state to a gray state to a dark state, the emergent light intensity and sin can be realized by controlling the voltage4And (2) is in direct proportion, so that the display function is realized, and information such as news key points, weather forecasts, calendars, mails, social networks, reminders and the like is displayed.
Example 5, the liquid crystal of this example was operated in VA mode.
The long axis direction of the liquid crystal molecules and the direction of the z axis in example 1 were aligned, and an electric field was applied to tilt the liquid crystal molecules from the upright state to the flat state, and the projection of the average optical axis of the liquid crystal molecules in the xy plane formed an angle of 45 degrees with the y axis, as shown in fig. 8.
Example 6:
the long axis direction of the liquid crystal molecules and the direction of the z axis in example 2 were aligned, and an electric field was applied to tilt the liquid crystal molecules from the upright state to the flat state, and the projection of the average optical axis of the liquid crystal molecules in the xy plane formed an angle of 45 degrees with the y axis, as shown in fig. 9.
Example 7 in this example the liquid crystal was operated in TN mode.
The long axis direction of the liquid crystal molecules and the direction of the z axis in example 1 were aligned, and an electric field was applied to tilt the liquid crystal molecules from the upright state to the flat state, and the projection of the average optical axis of the liquid crystal molecules in the xy plane formed an angle of 45 degrees with the y axis, as shown in fig. 10.
In example 8, the long axis direction of the liquid crystal molecules in example 2 and the z-axis direction were aligned, and an electric field was applied to tilt the liquid crystal molecules from the upright state to the flat state, and the projection of the average optical axis of the liquid crystal molecules in the xy plane formed an angle of 45 degrees with the y-axis, as shown in fig. 11.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. A mirror display device is characterized by sequentially comprising a first polarizer, a reflecting layer, a first substrate, a liquid crystal layer, a second substrate and a second polarizer, wherein the reflecting layer reflects light in the same polarization direction as the transmission axis of the first polarizer, and the liquid crystal layer has the thickness of 1/2 wavelengths.
2. The mirror display device according to claim 1, wherein the reflective layer is a brightness enhancement film in a metal wire grid polarizer or an APCF polarizer.
3. A mirror display device according to claim 1, wherein the first substrate comprises a TFT array and the second substrate comprises a color film.
4. The mirror display device according to claim 1, wherein the device operation mode is an IPS mode, an FFS mode, a VA mode or a TN mode.
5. The mirror display device according to claim 1, wherein the reflective layer is attached to the first polarizer by forming a composite film, or the reflective layer is an outer surface of the first substrate.
6. The mirror display device according to claim 1, wherein the liquid crystal layer has a thickness of 1/2 wavelengths of green light waves.
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| CN201922001724.9U CN211123553U (en) | 2019-11-19 | 2019-11-19 | Mirror display device |
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| CN201922001724.9U CN211123553U (en) | 2019-11-19 | 2019-11-19 | Mirror display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114815365A (en) * | 2021-01-28 | 2022-07-29 | 合肥京东方光电科技有限公司 | Display module assembly and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114815365A (en) * | 2021-01-28 | 2022-07-29 | 合肥京东方光电科技有限公司 | Display module assembly and display device |
| CN114815365B (en) * | 2021-01-28 | 2024-05-10 | 合肥京东方光电科技有限公司 | Display module and display device |
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