CN114063338A - Display screen - Google Patents
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- CN114063338A CN114063338A CN202111312378.1A CN202111312378A CN114063338A CN 114063338 A CN114063338 A CN 114063338A CN 202111312378 A CN202111312378 A CN 202111312378A CN 114063338 A CN114063338 A CN 114063338A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133616—Front illuminating devices
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- Mathematical Physics (AREA)
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Abstract
The present application relates to a display screen. The method comprises the following steps: the display panel comprises a plurality of light-passing control units distributed in an array; the reflecting layer is opposite to the display panel and used for reflecting the light rays incident from the display panel back to the display panel, and the direction of the light rays incident into the reflecting layer is opposite to the direction of the light rays emitted out of the reflecting layer; the display panel is used for controlling the light rays emitted from the light-passing control units so as to display images. The display screen can effectively reduce the implementation cost.
Description
Technical Field
The application relates to the technical field of display, in particular to a display screen.
Background
Most outdoor large-size display screens are located far away from the power grid. In order to provide enough electric energy for a display screen to display images, a power supply circuit needs to be specially constructed.
However, this results in expensive outdoor display implementation, which severely limits the application of outdoor large-size display screens.
Disclosure of Invention
In view of the above, it is necessary to provide a display screen capable of effectively reducing the implementation cost.
The application provides a display panel, including:
the display panel comprises a plurality of light-passing control units distributed in an array;
the reflecting layer is opposite to the display panel and used for reflecting the light rays incident from the display panel back to the display panel, and the direction of the light rays incident into the reflecting layer is opposite to the direction of the light rays emitted out of the reflecting layer;
the display panel is used for controlling the light rays emitted from the light-passing control units so as to display images.
In one embodiment, the reflective layer comprises a plurality of corner reflectors or glass beads distributed in an array.
In one embodiment, the light-passing control unit comprises a liquid crystal or a diaphragm.
In one embodiment, the display screen further comprises:
a backlight gain layer between the display panel and the reflective layer; the backlight gain layer comprises a plurality of focusing elements distributed in an array, the focusing elements are opposite to at least two light-passing control units, the focusing elements are used for gathering light rays emitted from the opposite light-passing control units to a target light-passing control unit and emitting the light rays, and the target light-passing control unit is a light-passing control unit opposite to the center of the focusing elements.
In one embodiment, the focusing element comprises a focusing lens.
In one embodiment, the display screen further comprises:
and the front light source is used for emitting light rays into the display panel.
In one embodiment, the front light comprises at least one of a spot light and a daylighting array.
In one embodiment, the lighting array includes a plurality of lighting elements distributed in an array, the lighting elements include a conical cylinder, a lighting lens, a condensing lens and an optical fiber, the lighting lens is fixed at the larger end of the conical cylinder, the condensing lens is arranged in the conical cylinder, the input end of the optical fiber is connected with the smaller end of the conical cylinder, and the output end of the optical fiber faces the display panel.
In one embodiment, the display screen further comprises:
the power generation equipment is used for converting solar energy or wind energy into electric energy;
and the storage battery is respectively electrically connected with the power generation equipment and the spotlight and is used for storing the electric energy converted by the power generation equipment and supplying power to the spotlight.
In one embodiment, the display screen further comprises:
and the fluorescent layers are positioned between the display panel and the reflecting layer or positioned on two opposite sides of the display panel respectively with the reflecting layer.
The display panel comprises a display panel and a reflection layer, wherein the reflection layer comprises a plurality of light passing control units distributed in an array mode, the light passing amount of the light passing control units can be adjusted, the light passing control units with larger light passing amounts represent bright points, the light passing control units with smaller light passing amounts represent dark points, and the plurality of light passing control units distributed in the array mode can integrally present images. The reflecting layer is opposite to the display panel, reflects light rays emitted from the display panel back to the display panel, can take the ambient light rays emitted to the display panel as backlight of the display panel, does not need self-luminescence of the display screen, and therefore the realization cost of the display screen is effectively reduced. The direction of light entering the reflecting layer is opposite to the direction of light exiting the reflecting layer, and the image display direction is consistent with the light source direction, so that the light entering the display screen can be reflected at high efficiency and is all used for displaying images, the utilization rate of the display screen to ambient light is high, the light of vehicles is effectively utilized to display images to the vehicles, the ambient light is fully utilized to display the images, and the display device is particularly suitable for high-speed scenes which are far away from a power grid and need to be displayed on a screen. And the direction of the display image is changed in real time along with the direction of the light source, so that the direction of the display image can be automatically adjusted to the optimal visual angle.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display screen in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a reflective layer according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a corner reflector according to an embodiment of the present application;
FIG. 4 is a schematic view of the corner reflector of FIG. 3 processing incident light rays;
FIG. 5 is a schematic diagram of the backlight gain layer shown in FIG. 1 processing incident light;
FIG. 6 is a schematic view of an incident light source of a display panel according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a light collection array in an embodiment of the present application.
Description of reference numerals: 10-display panel, 20-reflection layer, 30-backlight gain layer, 40-front light source, 50-fluorescent layer, 60-substrate, 70-sealing layer.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Spatially relative terms such as "upper" and "lower" are defined herein with reference to the drawings. Thus, it will be understood that "upper" and "lower" may be used interchangeably. It will be understood that when a layer is referred to as being "on" another layer, it can be formed directly on the other layer, or intervening layers may also be present. Thus, it will be understood that when a layer is referred to as being "directly on" another layer, there are no intervening layers interposed therebetween.
In the drawings, the size of layers and regions may be exaggerated for clarity. It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. In addition, it will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present. Like reference numerals refer to like elements throughout.
Hereinafter, although terms such as "first", "second", and the like may be used to describe various components, the components are not necessarily limited to the above terms. The above terms are only used to distinguish one component from another. It will also be understood that expressions used in the singular include expressions of the plural unless the singular has a distinctly different meaning in the context. Furthermore, in the following embodiments, it will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features or components, but do not preclude the presence or addition of one or more other features or components.
In the following embodiments, when layers, regions or elements are "connected", it may be interpreted that the layers, regions or elements are not only directly connected but also connected through other constituent elements interposed therebetween. For example, when layers, regions, elements, etc. are described as being connected or electrically connected, the layers, regions, elements, etc. may be connected or electrically connected not only directly or directly but also through another layer, region, element, etc. interposed therebetween.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. When a statement such as "at least one (or" an) of … … is placed after a list of elements (elements), the entire list of elements (elements) is modified rather than modifying individual elements (elements) in the list.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
Electronic or electrical devices and/or any other related devices or components (e.g., display devices including display panels and display panel drivers, wherein the display panel drivers also include driver controllers, gate drivers, gamma reference voltage generators, data drivers, and emission drivers) according to embodiments of the inventive concepts described herein may be implemented using any suitable hardware, firmware (e.g., application specific integrated circuits), software, or a combination of software, firmware, and hardware. For example, various components of these devices may be formed on one Integrated Circuit (IC) chip or on separate IC chips. In addition, various components of these devices may be implemented on a flexible printed circuit film, a Tape Carrier Package (TCP), a Printed Circuit Board (PCB), or formed on one substrate. In addition, various components of these devices may be processes or threads that execute on one or more processors in one or more computing devices, thereby executing computer program instructions and interacting with other system components to perform the various functions described herein. Moreover, those skilled in the art will recognize that the functions of the various computing devices may be combined or integrated into a single computing device, or that the functions of a particular computing device may be distributed across one or more other computing devices, without departing from the spirit and scope of the exemplary embodiments of the present inventive concept.
Although exemplary embodiments of a display module and a display apparatus including the same have been particularly described herein, many modifications and variations will be apparent to those skilled in the art. It will thus be appreciated that display modules and display devices incorporating the same constructed in accordance with the principles of the present invention may be implemented other than as specifically described herein. The application is also defined in the claims and their equivalents.
As described in the background art, the prior art outdoor large-sized display has a problem of expensive realization cost, and the inventor has found that the problem occurs because the outdoor large-sized display requires a lot of electric power for self-illumination. As the arrangement area of most outdoor large-size display screens is far away from a power grid, only a power supply circuit can be specially built to provide enough electric energy for the outdoor large-size display screens.
Further, because the outdoor display screen has large size and high brightness, the power supply equipment of the outdoor display screen cannot be obtained by the tiger naturally, and usually needs special construction and design, and comprises risk precautionary measures such as insurance, lightning protection and the like besides conventional voltage reduction and constant current. The display screen is a typical low-voltage high-current working characteristic, and the loss along the way, including the wire resistance, needs to be comprehensively considered. This also directly leads to the display screen power supply equipment to have certain requirements for external environmental conditions, mainly can provide long-term and stable high voltage power.
In addition, the maximum operation and maintenance cost of the outdoor display screen is the heat dissipation energy consumption under the outdoor condition, and the fault maintenance of heat dissipation and aging of parts is realized. Most outdoor display screens are eventually scrapped due to rapid aging of components. And the display screen enters an aging acceleration stage, the heat dissipation efficiency is reduced due to the fact that the marked events are faults of a radiator in the screen body and dust accumulation, and components in the screen are exposed in a high-temperature environment for a long time.
The display screen is relatively sealed, so that external environment airflow is difficult to enter the screen body, and heat circulation is realized; and secondly, in order to ensure clear display of the outdoor display screen, the high brightness of the lamp beads is usually required to be maintained for a long time, a large amount of electric energy is consumed by the high brightness of the lamp beads, the conversion efficiency of the electric energy is limited, and part of unconverted current is converted into heat.
In fact, the erection of outdoor display screens is subject to many environmental constraints, which are compromised comprehensively in the overall cost and the erection yield, and all of the above problems are directly accounted as the limited cost of the display screen. The realization cost of the outdoor large-size display screen is high, the erection conditions of the display screens at most positions are greatly limited, and the development and popularization of the outdoor large-size display screen are limited.
For the above reasons, the present application provides a display screen including a display panel and a reflective layer that are oppositely disposed. The reflecting layer is used for reflecting the light rays emitted from the display panel back to the display panel, and the direction of the light rays emitted into the reflecting layer is opposite to the direction of the light rays emitted out of the reflecting layer, so that the light rays emitted to the display screen from the outside can be reflected back to the display panel along the original path after passing through the display panel. The display panel comprises a plurality of light-transmitting control units which are distributed in an array mode and used for controlling light rays emitted from all the light-transmitting control units, so that the light rays emitted to the display screen from the outside and reflected back to the display panel are utilized to display images under the action of all the light-transmitting control units. The light of the display image comes from the outside, and the display screen is not required to be self-luminous, so that the electric energy required by the display screen is greatly reduced, a power supply circuit is not required to be specially built, the building difficulty of the outdoor large-size display screen is greatly reduced, the realization cost of the display screen applied to the outdoors is effectively reduced, and the application of the outdoor large-size display screen is effectively promoted.
Moreover, the display screen provided by the application realizes picture display by utilizing an ambient light reflection mode, and the outdoor environment can provide abundant ambient light just, so that the display screen reaches high enough brightness. The outdoor wind energy and solar energy can provide a control power supply for picture display, so that the display screen provided by the application is particularly suitable for being applied outdoors.
In addition, the picture display is realized only by utilizing the ambient light reflection mode, so that when the weather is good, the illumination intensity of ambient light is high, the contrast of the display screen is high, and a good display effect can be realized. However, when the weather is not good, the illumination intensity of the ambient light is low, the brightness of the display screen is insufficient, the contrast is low, and a good display effect is difficult to achieve. At night, the illumination of ambient light is weak, the visibility is poor, and the display screen cannot normally display at all. The direction that the reflection stratum was penetrated to light is opposite with the direction that jets out the reflection stratum in this application, and the display direction of picture is unanimous with the source direction of ambient light like this, can be to the vehicle display picture of passing through the display screen. The display screen sets up in the roadside, and when the vehicle was through the display screen, the car light shines the display screen, and the display screen utilizes car light display picture to the vehicle. In the process of moving the vehicle, the angle of the light emitted by the vehicle lamp and entering the display screen can be changed along with the movement of the vehicle, and meanwhile, the direction of the display image of the display screen can be changed along with the movement of the vehicle, so that the display image can be kept visible in the whole process that the vehicle passes through the display screen. When the vehicle leaves the display screen, the display screen does not display the picture due to lack of ambient light. All environment light display frames are effectively utilized, the brightness display frames of the display screen can be improved in real time according to the display needs of the frames, the problem that the display effect is not good when the environment light is not enough in irradiation is solved, the display screen displays when the vehicle passes through the display screen and does not display when the vehicle leaves the display screen and does not need to display, and the display benefit of the display screen can be optimal.
Because the display screen that this application provided itself need not to give out light or only need supply very little light source can reach good display effect, so the consumption of this application display screen is very low to do not have the heat that the heavy current received the line resistance to influence the conversion, do not have the heat to accumulate the high thermal environment that reduces device life's problem at the inside formation of display screen. And the luminous ambient light who deviates from and filters in the display screen that comes from of the display screen that this application provided, luminance can be less than external ambient light, can not lead to the environment to appear light pollution because of the display screen, effectively avoids appearing the highlight and shows that to disturb other equipment work or influence personnel's sight. The outdoor display device is simple in structure, light and thin in machine body and particularly suitable for being applied to outdoor display scenes.
Referring to fig. 1, an embodiment of the present application provides a display screen, which includes a display panel 10 and a reflective layer 20. The display panel 10 includes a plurality of light-passing control units distributed in an array. The reflective layer 20 is opposite to the display panel 10, and reflects light incident from the display panel 10 back to the display panel 10, and the direction of light incident on the reflective layer 20 is opposite to the direction of light exiting from the reflective layer 20. The display panel 10 is used to control light emitted from each light-passing control unit to display an image.
In this embodiment, the light transmission amount of the light transmission control unit can be adjusted, the light transmission control unit with a larger light transmission amount appears as a bright spot, the light transmission control unit with a smaller light transmission amount appears as a dark spot, and the whole of the plurality of light transmission control units distributed in an array can present an image. The reflective layer 20 reflects light incident from the display panel 10 back to the display panel 10, and ambient light emitted toward the display panel 10 can be used as backlight of the display panel 10, so that self-luminescence of the display screen is not required, and the implementation cost of the display screen is effectively reduced. The direction of light entering the reflecting layer 20 is opposite to the direction of light exiting the reflecting layer 20, and the image display direction is consistent with the light source direction, so that the light entering the display screen can be reflected at high efficiency and is all used for displaying images, the utilization rate of the display screen to ambient light is high, the light of vehicles is effectively utilized to display images to the vehicles, the ambient light is fully utilized to display the images, and the display device is particularly suitable for high-speed scenes which are far away from a power grid and need to be displayed on a screen. And the direction of the display image is changed in real time along with the direction of the light source, so that the direction of the display image can be automatically adjusted to the optimal visual angle.
As shown in fig. 2, in some embodiments of the present application, the reflective layer 20 includes a plurality of corner reflectors 21 or glass beads distributed in an array to achieve the primary reflection of light incident from the display panel 10 back to the display panel 10.
As shown in fig. 3, the corner reflector 21 illustratively includes three flat mirrors perpendicular to each other.
As shown in fig. 4, after entering the reflective layer 20 from any direction through the display panel 10, the ambient light is reflected from the first plane mirror of the corner reflector 21 to the second plane mirror, and then reflected back to the display panel 10 from the second plane mirror of the corner reflector 21. Since the angle of incidence of the light reflected by the mirrors is equal to the exit angle, plus the sum of the exit angle α of the light at the first mirror and the angle of incidence β of the light at the second mirror is equal to the angle γ between the first and second mirrors, the sum of the angle of incidence α of the light at the first mirror, the angle α of exit at the first mirror, the angle β of incidence at the second mirror, and the angle β of exit at the second mirror is equal to the angle γ between the first and second mirrors multiplied by 2. Since the first flat mirror is perpendicular to the second flat mirror, the sum of the angle of incidence α of the light on the first flat mirror, the angle of exit α on the first flat mirror, the angle of incidence β on the second flat mirror, and the angle of exit β on the second flat mirror equals 180 °. At this time, the light entering the reflective layer 20 through the display panel 10 is parallel to the light reflected back to the display panel 10 by the reflective layer 20, and the direction of the light entering the reflective layer 20 is opposite to the direction of the light exiting the reflective layer 20.
In some embodiments of the present application, the light-passing control unit includes a liquid crystal or a diaphragm.
The liquid crystal can adjust the brightness of the image, and can perform adaptive adjustment according to the brightness of external light, so that the display screen can stably display the image. The diaphragm is simple to control, the energy consumption is low, and the endurance is longer.
Illustratively, the light-passing control unit further includes a color filter.
When the light-passing control unit includes both liquid crystal and color filters, ambient light reflected by the reflective layer 20 can pass through the color filters of different colors to obtain light of corresponding colors, and then the transmittance of the light of different colors can be adjusted by controlling the color filters to twist corresponding to the liquid crystal, so that the adjustment of color and brightness is realized, and the display screen finally displays a color image. When the light-passing control unit includes only liquid crystal, the display screen displays a gray image.
When the light-passing control unit includes both the diaphragm and the color filter, the ambient light reflected by the reflective layer 20 passes through the color filter to obtain light of a corresponding color, and then the presence or absence of light can be controlled by controlling the on-off of the color filter corresponding to the diaphragm, so that the display screen finally displays a monochrome image. When the light-passing control unit includes only the diaphragm, the display screen displays a black-and-white image.
In practical applications, the brightness of the display image on the display screen is highly correlated with the ambient light. When the external light environment is good, the brightness of the display image of the display screen is high. When the external light environment is poor, the brightness of the display image of the display screen is low. In order to stabilize the display image on the display screen, in some embodiments of the present application, the light-passing control unit includes a liquid crystal and an optical sensor, and the optical sensor is connected to the liquid crystal.
In this embodiment, by adding the optical sensor, the light brightness can be detected, and then the liquid crystal is adjusted based on the light brightness, so as to control the brightness of the display image of the display screen within a certain range.
Illustratively, the optical sensor is a light-sensitive sensor or a brightness sensor.
In other embodiments of the present application, the display panel 10 further includes a light-shielding grid for performing a preliminary light-shielding process. The shielding grating can block part of light rays, and light pollution caused by overhigh brightness of images displayed by the display screen is avoided.
In practical applications, the amount of ambient light incident on the display screen is limited, and there is a loss in the display screen, so that the brightness of the image displayed on the display screen is lower than that of the ambient light, which affects the display effect of the display screen. In view of the above, in some embodiments of the present application, as shown in conjunction with fig. 3, the display screen further includes a backlight gain layer 30. The backlight gain layer 30 is located between the display panel 10 and the reflective layer 20. The backlight gain layer 30 includes a plurality of focusing elements 31 distributed in an array, the focusing elements 31 are opposite to at least two light-passing control units, the focusing elements 31 are used for gathering the light rays entering from the opposite light-passing control units to a target light-passing control unit, and the target light-passing control unit is a light-passing control unit opposite to the center of the focusing elements 31.
In this embodiment, the display panel further includes a backlight gain layer 30, the backlight gain layer 30 is located between the display panel 10 and the reflective layer 20, and light rays incident on the display panel 10 and reflected back to the display panel 10 by the reflective layer 20 pass through the backlight gain layer 30. The backlight gain layer 30 comprises a plurality of focusing elements 31 distributed in an array mode, the focusing elements 31 are opposite to at least two light-passing control units, the focusing elements 31 gather light rays emitted from the opposite light-passing control units to the light-passing control units opposite to the centers of the focusing elements 31, the number of the light rays in the target light-passing control units is increased by reducing the number of the light rays in other light-passing control units, scattered light surfaces with low brightness are gathered into concentrated light spots with high brightness, partial pixel points can be sacrificed, the brightness is concentrated in a few pixel points, the brightness of a displayed image is improved, the contrast of a display screen is improved, and the display effect of the display screen is ensured. In addition, the target light-transmitting control unit is concentrated with at least two light-transmitting control units, so that the quantity of light in the target light-transmitting control unit is possibly higher than that of ambient light, the contrast of the display screen is improved, and the display screen can achieve a better display effect.
As shown in fig. 5, ambient light incident on the display screen is reflected and refracted by the backlight gain layer 30, the reflected light is directly reflected to the target light-transmission control unit, and the refracted light is reflected by the reflective layer 20 for the second time and then reaches the target light-transmission control unit. At this moment, the direction that ambient light jetted out the display screen no longer follows the direction change of jeting into the display screen, and the visual angle that the display screen shows the image can the grow, and the ambient light that jets into the display screen from arbitrary angle all can play the light filling effect to the image that the display screen shows.
Illustratively, the degree of focusing of the focusing element 31, and the number of light-passage control units opposite to the focusing element 31, are inversely related to the number of incident light rays of a single light-passage control unit.
If the number of the incident light rays of a single light-passing control unit is large, the focusing degree of the focusing element 31 is low, and the number of the light-passing control units opposite to the focusing element 31 is small, the brightness of the display image of the display screen can reach the visual range. Therefore, only a few pixels are used for receiving light, most pixels are used for displaying images, and the display screen is high in pixel density, high in resolution and good in display quality.
If the number of the incident light rays of a single light-passing control unit is small, the focusing degree of the focusing element 31 is high, and the number of the light-passing control units opposite to the focusing element 31 is large, so that the brightness of the display image of the display screen can reach the visible range. Most of pixels are used for receiving light on the display screen like this, and only a few pixels are used for displaying image, and the resolution ratio of display screen is lower, nevertheless is obvious to the promotion effect of luminance, can guarantee the display effect of image.
Illustratively, the focusing element 31 comprises a focusing lens.
Specifically, the degree of focusing of a single focusing lens, the number of focusing lenses included in the focusing element 31 and the degree of focusing of the focusing element 31 are positively correlated. When a higher degree of focusing of the focusing element 31 is required, a focusing lens with a higher degree of focusing may be selected and/or a larger number of focusing lenses may be combined. When a lower degree of focusing of the focusing element 31 is desired, a lower degree of focusing lens, and/or a smaller number of focusing lenses, may be selected.
In practical applications, the amount of ambient light incident on the display screen is limited, and there is a loss in the display screen, so that the brightness of the image displayed on the display screen is lower than that of the ambient light, which affects the display effect of the display screen. In view of the above, in some embodiments of the present application, as shown in fig. 1, the display screen further includes a front light source 40 for emitting light into the display panel 10.
In this embodiment, the display screen further includes a front light source 40, the front light source 40 emits light into the display panel 10, the light emitted into the display panel 10 can be increased, and then the light reflected back to the display panel 10 by the reflective layer 20 is increased, so as to increase the brightness of the display image displayed on the display panel 10, and finally improve the quality of the display image displayed on the display panel 10.
Illustratively, the front light 40 includes at least one of a spot light and a lighting array.
The spotlight can self-illuminate, influence of natural environment can be ignored, and the display screen is guaranteed to have a good display effect. The lighting array can collect ambient light from other areas and supply the ambient light to the display panel 10, no extra power consumption is required, and the energy consumption of the display screen is low.
Illustratively, the spotlight is connected to the optical sensor.
When the ambient light is good, the spotlight is turned off, and the display screen can display images by completely utilizing the ambient light. Because the light comes from the surrounding environment completely, the brightness of the display image can be changed in a self-adaptive manner according to the field environment, and the problem of light pollution can be avoided. At this moment, the display screen does not need to provide a light source at noon or afternoon with higher temperature in a day, so that the energy consumption is very low and the display screen does not generate heat. When ambient light is not good, although the spot lamp is turned on and can generate heat, the spot lamp is positioned at lower night or rainy days, the display screen can easily dissipate heat, and the heat cannot be generated.
Illustratively, the spotlight is mounted on the front or side of the display screen, and out of the display direction of the display screen, to direct the display direction of the display screen toward the user. For example, the spotlight is installed below the display screen and follows the direction of light emitted by the car light, so that the direction of the image displayed on the display screen is consistent with the driving direction of the car, and the user is positioned at the optimal viewing angle of the display screen.
As shown in fig. 6, the display screen is disposed at the roadside, and usable light sources include a street lamp a, a spot lamp B, and a car lamp C. Street lamp A interval sets up in the both sides of road, and it is big to illuminate the area, and luminance and directive property are relatively weak. The spotlight B is erected in front of the display screen, and has stronger brightness and directivity. The car light C is only available when the car passes through the display screen, and the randomness is strong. The use of three kinds of light is coordinated, and the luminance that the display screen shows the image is better, can satisfy the needs that show the image.
As shown in fig. 7, the lighting array exemplarily includes a plurality of lighting members distributed in an array, and the lighting members include a tapered cylinder 41, a lighting lens 42, a condensing lens 43, and an optical fiber 44. The lighting lens 42 is fixed at the larger end of the tapered cylinder 41, the condenser lens 43 is disposed in the tapered cylinder 41, the input end of the optical fiber 44 is connected to the smaller end of the tapered cylinder 41, and the output end of the optical fiber 44 faces the display panel 10.
In each lighting member, a lighting lens 42 is fixed at the larger end of the conical cylinder 41, and can collect a larger amount of ambient light. The condenser lens 43 is disposed in the tapered cylinder 41, and can collect the ambient light collected by the light collecting lens 42 to the smaller end of the tapered cylinder 41. The smaller end of the tapered cylinder 41 at the input end of the optical fiber 44 is connected, and the output end of the optical fiber 44 faces the display panel 10, so that light rays in the tapered cylinder 41 can be guided to the display panel 10, and the brightness of images displayed on the display screen is improved.
Illustratively, the daylighting lens 42 is disposed toward one of the sky, street lights, and road surface. When the lighting lens 42 is arranged towards the sky, the sunlight can be collected for backlight gain. When the lighting lens 42 is disposed toward the road surface, the light emitted from the vehicle lamp can be collected for backlight gain.
Illustratively, the front light 40 includes a plurality of light collection arrays for collecting light from different areas. For example, the lighting lens 42 of at least one lighting array faces the road surface, collects the reflected light from the road surface after being irradiated by the vehicle lamp, and projects the light onto the display panel 10 through the condensing lens 43 and the optical fiber 44; the lighting lens 42 of at least one lighting array faces the street lamp, collects light emitted by the street lamp, and projects the light onto the display panel 10 through the condenser lens 43 and the optical fiber 44; the lighting lens 42 of the at least one lighting array is oriented towards the direction of the vehicle driving towards the display screen, collects the light emitted by the vehicle lamp, and projects the light onto the display panel 10 through the condenser lens 43 and the optical fiber 44. These lighting arrays, in addition to the light collected by the display panel 10, can achieve a good display effect.
In practical application, the expressway has no street lamp, does not have the condition of building a spotlight, and only the car lamp can be used. The car light is far away from the display screen, the brightness of light reaching the display screen is limited, and the contrast of images displayed by the display screen is low. And the light of car light is concentrated, can only shine the subregion of display screen, and the unable complete display image of display screen to the display area can follow car light fast movement, and the user hardly sees clearly. Therefore, when the light source is provided by the vehicle lamp only at night, the display quality of the display screen is poor. Based on the above, in some embodiments of the present application, the display panel further includes a phosphor layer 50, as shown in fig. 1. The fluorescent layer 50 is disposed between the display panel 10 and the reflective layer 20, or disposed on opposite sides of the display panel 10 from the reflective layer 20, respectively.
In this embodiment, the display panel further includes a fluorescent layer 50, and the fluorescent layer 50 is excited by light to form afterglow, which can make an image displayed by the display panel stay for a period of time, during which the image displayed by the display panel can be seen, so that the display time of the display panel is prolonged by the afterglow of the fluorescent layer 50.
In some embodiments of the present application, the display screen further comprises a power generation device and a battery. Power generation plants are used to convert solar or wind energy into electrical energy. The storage battery is respectively electrically connected with the power generation equipment and the spotlight and is used for storing the electric energy converted by the power generation equipment and supplying power to the spotlight.
In this embodiment, the power generation device converts solar energy into electric energy to be stored in the storage battery when the lighting condition is good, or converts wind energy into electric energy to be stored in the storage battery when wind exists, and then supplies power to the spotlight when the lighting condition is not good, such as at night, and thus, a power supply circuit does not need to be additionally laid, and the realization cost is low.
Illustratively, the power generation equipment comprises a solar panel, or the power generation equipment comprises a windmill and a generator, and a rotating shaft of the windmill is coaxially connected with the generator.
In practical applications, the amount of ambient light incident on the display screen is limited, and there is a loss in the display screen, so that the brightness of the image displayed on the display screen is lower than that of the ambient light, which affects the display effect of the display screen. In view of the above, in some embodiments of the present application, the display screen further comprises a backlight light source. And a backlight light source for emitting light into the display panel 10.
Illustratively, the backlight light source has the same structure as the front light source 40, and is not described in detail herein. Wherein the output ends of the optical fibers 44 are connected to the reflective layer 20.
Specifically, as shown in fig. 1, the display panel further includes a substrate 60 and a sealing layer 70, and the reflective layer 20, the display panel 10, and the sealing layer 70 are sequentially stacked on the substrate 60. The substrate 60 plays a role of bearing, and the sealing layer 70 can prevent the inside of the display screen from being polluted and corroded by the external environment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A display screen, wherein the display screen comprises:
the display panel comprises a plurality of light-passing control units distributed in an array;
the reflecting layer is opposite to the display panel and used for reflecting the light rays incident from the display panel back to the display panel, and the direction of the light rays incident into the reflecting layer is opposite to the direction of the light rays emitted out of the reflecting layer;
the display panel is used for controlling the light rays emitted from the light-passing control units so as to display images.
2. A display screen in accordance with claim 1, wherein the reflective layer comprises a plurality of corner reflectors or glass beads distributed in an array.
3. The display screen of claim 1, wherein the light control unit comprises a liquid crystal or a diaphragm.
4. A display screen according to any one of claims 1 to 3, wherein the display screen further comprises:
a backlight gain layer between the display panel and the reflective layer; the backlight gain layer comprises a plurality of focusing elements distributed in an array, the focusing elements are opposite to at least two light-passing control units, the focusing elements are used for gathering light rays emitted from the opposite light-passing control units to a target light-passing control unit and emitting the light rays, and the target light-passing control unit is a light-passing control unit opposite to the center of the focusing elements.
5. A display screen in accordance with claim 4, wherein the focusing element comprises a focusing lens.
6. The display screen of claim 4, further comprising:
and the front light source is used for emitting light rays into the display panel.
7. A display screen in accordance with claim 6, wherein the front-facing light source comprises at least one of a spot light and a daylighting array.
8. The display screen of claim 7, wherein the lighting array comprises a plurality of lighting elements distributed in an array, the lighting elements comprise a conical cylinder, a lighting lens, a condensing lens and an optical fiber, the lighting lens is fixed at a larger end of the conical cylinder, the condensing lens is arranged in the conical cylinder, an input end of the optical fiber is connected with a smaller end of the conical cylinder, and an output end of the optical fiber faces the display panel.
9. The display screen of claim 7, further comprising:
the power generation equipment is used for converting solar energy or wind energy into electric energy;
and the storage battery is respectively electrically connected with the power generation equipment and the spotlight and is used for storing the electric energy converted by the power generation equipment and supplying power to the spotlight.
10. A display screen according to any one of claims 1 to 3, wherein the display screen further comprises:
and the fluorescent layers are positioned between the display panel and the reflecting layer or positioned on two opposite sides of the display panel respectively with the reflecting layer.
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Application publication date: 20220218 |