KR102289938B1 - Transparent display device and Multi-display system using The same - Google Patents

Abstract

A transparent display device according to an embodiment of the present invention includes a transparent liquid crystal panel; and a control unit for adjusting the brightness of the image displayed on the transparent liquid crystal panel and the transmittance of the light irradiated to the transparent liquid crystal panel, wherein the transparent liquid crystal panel is disposed on the back side and integrated with the LED bar provided along the edge line It includes a manufactured light guide plate.

Description

Transparent display device and multi-transparent display device using same

The present invention relates to a transparent display device and a multi-transparent display device using the same.

In recent years, as society enters a full-fledged information age, the field of display that processes and displays a large amount of information has developed rapidly, and various display devices have been developed and spotlighted in response to this.

Specific examples of such a display device include a liquid crystal display (LCD), an organic light emitting diode (OLED), a plasma display panel device (PDP), and a field emission display device (Field Emission). Display device: FED), electroluminescence display device (ELD), etc. are mentioned, and these display devices show excellent performance of thinness, light weight, and low power consumption and are widely used.

On the other hand, recently, research on a transparent display device that allows a user to see an object or image located on the opposite side through the display device has been actively conducted due to its characteristics. Such a transparent display device has the advantages of space utilization, interior and design, and is accelerating the development so that it can be used in a wider area.

However, the transparent display device has a problem in that visibility is greatly changed by external light due to its characteristics.

To explain this in more detail, the transparent display device has to maintain a black state in a state in which no image is implemented, but when the surroundings are bright, there is a problem in that the black state cannot be maintained because background light passes through the pixels.

In addition, even when implementing an image, the image of the background is overlapped by the influence of external light, and there is a problem in that the sharpness and visibility of the image are deteriorated.

Patent Publication No. 10-2015-0034407

An object of the present invention is to provide a transparent display device capable of solving the conventional problems and a multi-transparent display device using the same.

A transparent display device according to an embodiment of the present invention for solving the above problems is a transparent liquid crystal panel; and an illuminance sensor for detecting external illuminance. a brightness control unit for adjusting the light brightness of the LED bar according to the detected external illuminance; and a control unit for controlling brightness of an image displayed on the transparent liquid crystal panel and transmittance of light irradiated to the transparent liquid crystal panel, wherein the transparent liquid crystal panel includes: a first protective glass; a transparent LCD adhered to the first protective glass; a PDLC that is adhered to the LCD and controls the transmittance of the light according to a control signal provided from the outside; a second protective glass adhered to the PDLC; and a light guide plate which is disposed on the rear surface and is manufactured integrally with the LED bar provided along the edge line, wherein the light guide plate has a periodic linear nanopattern having a pitch of 1 nm to 1000 nm, and the periodic linear It is characterized in that the ratio of the pitch of the nanopattern to the height of the pattern is 1:0.5 to 10.

Although preferred embodiments of the present invention have been described above, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the following claims. will be able to understand

When the transparent display device according to an embodiment of the present invention is used, there is an effect that an image and a rear surface can be visually recognized at the same time by providing a transparent display device in which a side backlight is implemented using an LED bar.

1 is a block diagram of a transparent display device according to an embodiment of the present invention.
FIG. 2 is an exemplary view showing a vertical cross-sectional structure of the liquid crystal panel shown in FIG. 1 .
3 is an exemplary diagram illustrating a connection relationship between a transparent LCD, a data driver, a gate driver, and a timing controller of the transparent display device of FIG. 1 .
4 is an exemplary diagram illustrating a state change of a PDLC according to a power-on state.
FIG. 5 is an exemplary view illustrating an example of a linear nanopattern of the light guide plate shown in FIG. 1 .
6 is a view showing an actual photograph of the light guide plate shown in FIG. 5 .
7 is a block diagram illustrating a multi-transparent display device according to an embodiment of the present invention.
FIG. 8 is an actual photograph of the multi-transparent display device illustrated in FIG. 7 .
9 illustrates an example computing environment in which one or more embodiments disclosed herein may be implemented.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings. Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings.

However, the present invention may be embodied in various different forms, and is not limited to the described embodiments. In addition, in order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals in the drawings denote the same members.

Throughout the specification, when a part “includes” a certain component, it does not exclude other components unless otherwise stated, but may further include other components.

Hereinafter, a transparent display device and a multi-transparent display device using the same according to an embodiment of the present invention will be described in more detail based on the accompanying drawings.

1 is a block diagram of a transparent display device according to an embodiment of the present invention, FIG. 2 is an exemplary view showing a vertical cross-sectional structure of the liquid crystal panel shown in FIG. 1, and FIG. 3 is a transparent LCD of the transparent display device of FIG. , a data driver, a gate driver, and a timing controller are exemplary views showing the connection relationship, FIG. 4 is an exemplary view showing a state change of the PDLC according to a power applied state, and FIG. 5 is a linear nanopattern of the light guide plate shown in FIG. It is an exemplary view showing an example, and FIG. 6 is a view showing an actual photograph of the light guide plate shown in FIG. 5 .

First, referring to FIGS. 1 to 3 , the transparent display device 100 according to an embodiment of the present invention is a device for recognizing an object located on the back of the device as the transparent display device displays an image and has transparency at the same time. , more specifically, includes a liquid crystal panel 200 and a control unit 300 .

The liquid crystal panel 200 is a panel for displaying an image provided from the outside, and includes a first protective glass 210 , a transparent LCD 220 , a PDLC 230 , a second protective glass 240 , and a light guide plate 250 . do.

The transparent LCD 220 receives an image output from an external imaging device through the image input unit of the controller 300 and displays it.

For reference, the transparent LCD 220 is a first enclosure such as a transparent Lexan-like enclosure, Advanced Link Photonics (ALP), Inc. A first polarizer retardation film with a half-wave mirror having a mirror reluctance of 15 to 60 percent, such as a polarizer retardation film manufactured by Irvine, Calif., 0 to 30 percent A first having a diffractive or diffractive surface or element having a surface haze therebetween, a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED) surrounding an optical grade plastic. 1 optical grade plastic, a second diffusing surface having a surface haze of 0 to 60 percent, a first transflective film such as a translucent film manufactured by ALP, Inc., an LCD panel, a transflective film manufactured by ALP, Inc. and a second optical grade plastic having the same second transflective film, a third diffusing surface having a surface haze of 0 to 60 percent, a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED) surrounding the optical grade plastic; 4 Half-wave mirrors having a specular reluctance of 15 to 60 percent, such as a polarizer retardation film manufactured by ALP, Inc., a device having a diffusing or diffractive surface or a surface haze between 0 and 30 percent. A second polarizer retardation film having a second enclosure and a second enclosure such as a transparent Lexan-like enclosure may be configured.

The above-described configurations are only examples and may be substituted with other configurations.

Next, the PDLC (Polymer Dispered Liquid Crystal: 230) may be located at the rear of the transparent LCD 220, and may be a unit that adjusts the transmittance of light according to a control signal provided from the outside.

For reference, in the PDLC 230 , fine liquid crystal droplets are formed in the matrix of a polymer material, so that the transmittance of light is changed in response to a voltage applied from the outside.

The PDLC 230 is controlled from a completely transparent state to a transmittance of 1 to 100% according to the intensity of a voltage applied by the control of the controller 300, and has a characteristic of becoming a milky opaque state when the voltage is turned off. .

The PDLC 230 may be manufactured in various forms if the transmittance of light may be adjusted based on the processing signal of the controller 300 , and if the image beam projected on the panel is scattered and the image is formed and displayed forward. That is, the PDLC 230 may be formed in a thin sheet form or a panel form, or may be formed in a form in which a sheet is attached to a transparent panel.

Next, the light guide panel (LGP) 250 may be a unit that uniformly distributes light coming from a light source located on the side of the transparent LCD 220 over a desired area. The light guide plate 250 is provided with an LED bar 251 serving as a light source at an edge line.

The light guide plate 250 is a light guide plate on which linear nanopatterns are formed, the periodic linear nanopatterns have a pitch of 1 nm to 1000 nm, and the ratio of the pattern pitch to the pattern height is 1:0.5 to 10 days.

The light guide plate 250 has a continuous linear pattern with a nano-level pitch, unlike a dot-shaped pattern, which is a discontinuous pattern form, and thus does not adopt a structure in which the density distribution of the pattern is different. It has the advantage of being able to induce efficient dispersion of light and making the light guide plate thinner. As mentioned earlier, "pitch" means the spacing between two adjacent linear patterns.

On the other hand, the linear pattern may preferably be a linear pattern having a shape such as a straight line, a waveform, a curved line, a circular shape, a triangular shape, a rectangular shape, a hexagonal shape, and the like. no.

Preferably, the circle-shaped linear, the triangular-shaped linear, the rectangular-shaped linear, and the hexagonal-shaped linear are concentric, that is, arranged in a form having the same center to form a periodic linear pattern. In one embodiment of the present invention, a straight linear pattern is periodically formed to have a linear pattern in which the shape of valleys and mountains are repeatedly formed.

The material of the light guide plate 250 is polymethyl methacrylate (PMMA), polycarbonate (PC), acrylic resin, cyclo olefin polymer (COP), polyvinyl alcohol (polyvinyl alcohol). , PVA), and may be at least one selected from the group consisting of polyvinyl chloride (PVC), but is not limited thereto.

Therefore, as in the prior art, the LED bar 251 is disposed on the side of the light guide plate 250 without a backlight on the rear or upper surface, and as it is manufactured integrally with the light guide plate, there is no need for a separate internal space for providing a backlight as in the prior art, Accordingly, in the conventional liquid crystal display device that has been removed, it may be possible to see the rear side as a space for the backlight.

Meanwhile, the transparent display apparatus 100 according to an embodiment of the present invention may include a data driver 201 , a gate driver 202 , and a timing controller 203 .

The data driver 201 drives the plurality of data lines by supplying data voltages to the plurality of data lines DL to DLm connected to the transparent LCD.

The gate driver 202 sequentially drives the plurality of gate lines GL1 to GLn by sequentially supplying scan signals to the plurality of gate lines GL1 to GLn.

The timing controller 203 controls the data driver 201 and the gate driver 202 by supplying various control signals to the data driver 201 and the gate driver 202 .

The timing controller 203 starts scanning according to the timing implemented in each frame, converts externally input image data to match the data signal format used by the data driver 201, and outputs the converted image data. , control the data operation at an appropriate time according to the scan.

The gate driver 202 sequentially drives the plurality of gate lines by sequentially supplying a scan signal of an on voltage or an off voltage to the plurality of gate lines under the control of the timing controller 203 .

The gate driver 202 may be located on only one side according to a driving method or a transparent LCD design method, or may be located on both sides in some cases.

Also, the gate driver 202 may include one or more gate driver integrated circuits.

Each gate driver integrated circuit is connected to a bonding pad of the transparent LCD 220 by a tape automated bonding (TAB) method or a chip-on-glass (COG) method, or a gate in panel (GIP) method. It may be implemented as a type and directly disposed on the transparent LCD 220 , or may be integrated and disposed on the transparent LCD 220 in some cases.

Each gate driver integrated circuit may be implemented in a Chip On Film (COF) method. In this case, the gate driving chip corresponding to each gate driver integrated circuit may be mounted on a flexible film, and one end of the flexible film may be bonded to the transparent LCD.

When a specific gate line is opened, the data driver 201 converts the image data received from the timing controller into an analog data voltage and supplies the data to the plurality of data lines to drive the plurality of data lines.

The data driver 201 may include at least one source driver integrated circuit to drive a plurality of data lines.

Each source driver integrated circuit may be connected to the bonding pad of the LCD and/or PLCD by a Tape Automated Bonding (TAB) method or a COG method, or may be directly disposed. Accordingly, it may be disposed directly on the transparent LCD.

In addition, each source driver integrated circuit may be implemented in a Chip On Film (COF) method. In this case, the source driving chip corresponding to each source driver integrated circuit is mounted on a flexible film, one end of the flexible film is bonded to at least one source printed circuit board (Source Printed Circuit Board), and the other end is bonded to the LCD. do.

The source printed circuit board may be connected to the control printed circuit board through a connection medium such as a flexible flat cable (FFC) or a flexible printed circuit (FPC).

On the other hand, the transparent display device 100 according to the embodiment of the present invention is connected to the output terminal of the image recording medium (eg, MPEG board, USB, SD card, notebook, PC / DIVX, any one) and the cable to the recording Images stored in the media or real-time images can be output.

Meanwhile, the transparent display apparatus 100 according to an embodiment of the present invention may further include an illuminance sensor module 400 .

The illuminance sensor module 400 adjusts the brightness of the LED bar 251 based on detection information of detecting the illuminance of external light.

The illuminance sensor module 400 may include an illuminance sensor for detecting external illuminance and a brightness adjusting unit for adjusting the light brightness of the LED bar according to the detected external illuminance.

That is, the illuminance sensor module 400 is an LED control sensor device, and can adjust the brightness of the screen image by detecting the illuminance deviation between day and night to automatically or manually adjust the illuminance.

7 is a block diagram illustrating a multi-transparent display device according to an embodiment of the present invention, and FIG. 8 is an actual product photograph of FIG.

7 and 8 , the multi-transparent display apparatus 2000 according to an embodiment of the present invention includes a plurality of transparent display units 2100 , 2200 , 2300 , 2400 and an image processing unit 2500 .

Each of the plurality of transparent display units 2100, 2200, 2300, 2400 is a device capable of displaying an image and a rear view at the same time, and as shown in FIG. 1, a first protective glass 210, a transparent LCD 220 , the PDLC 230 , the second protective glass 240 and the light guide plate 250 may include a liquid crystal panel.

In addition, each of the transparent display units 2100 , 2200 , 2300 , and 2400 includes data drivers 2101 , 2201 , 2301 , 2401 , gate drivers 2102 , 2202 , 2302 , 2402 , and timing controllers 2103 , 2203 , 2303 and 2403 . ), and the functions of each data driver, gate driver, and timing controller are replaced with the description of FIG. 2 .

The multi-transparent display device of the present invention may be coupled in up, down, left, and right directions, and in the present invention, a form having four will be described as an example. On the other hand, the present invention is not limited to the number and/or the combination direction.

Next, the image processing unit 2500 outputs a divided image obtained by dividing a single image provided from the outside to the plurality of transparent display units.

Meanwhile, the multi-transparent display device of the present invention may include a touch panel and an interface unit interworking with a touch signal of the touch panel. When the touch panel is attached to the front side, an interactive function with a viewer can be implemented.

Accordingly, in the multi-transparent display device of the present invention, when a light source device, a power supply device, and a media board (image processing device) are mounted in a frame and exhibits are arranged in the frame, images and exhibits can be displayed at the same time.

Here, the difference between a general liquid crystal display device and the transparent display device of the present invention is whether the liquid crystal panel is transparent, and even a transparent panel cannot implement transparent view by itself if there is no auxiliary light source around the transparent panel.

According to the present invention, an image can be output to a transparent LCD by attaching a PDLC and a light guide plate to the transparent LCD without securing a space for the backlight on the rear surface of the transparent panel. The liquid crystal panel presented in the present invention can be implemented with a thickness of 3 cm to 7 cm.

9 is a diagram illustrating an example computing environment in which one or more embodiments disclosed herein may be implemented, and is an illustration of a system 1000 including a computing device 1100 configured to implement one or more embodiments described above. shows For example, computing device 1100 may be a personal computer, server computer, handheld or laptop device, mobile device (mobile phone, PDA, media player, etc.), multiprocessor system, consumer electronics, minicomputer, mainframe computer, distributed computing environments including any of the aforementioned systems or devices, and the like.

The computing device 1100 may include at least one processing unit 1110 and a memory 1120 . Here, the processing unit 1110 may include, for example, a central processing unit (CPU), a graphic processing unit (GPU), a microprocessor, an Application Specific Integrated Circuit (ASIC), Field Programmable Gate Arrays (FPGA), and the like. and may have a plurality of cores.

The memory 1120 may be a volatile memory (eg, RAM, etc.), a non-volatile memory (eg, ROM, flash memory, etc.), or a combination thereof. Additionally, computing device 1100 may include additional storage 1130 . Storage 1130 includes, but is not limited to, magnetic storage, optical storage, and the like. The storage 1130 may store computer readable instructions for implementing one or more embodiments disclosed herein, and other computer readable instructions for implementing an operating system, an application program, and the like. Computer readable instructions stored in storage 1130 may be loaded into memory 1120 for execution by processing unit 1110 . Computing device 1100 may also include input device(s) 1140 and output device(s) 1150 .

Here, the input device(s) 1140 may include, for example, a keyboard, mouse, pen, voice input device, touch input device, infrared camera, video input device, or any other input device, or the like. Further, the output device(s) 1150 may include, for example, one or more displays, speakers, printers, or any other output device, or the like. Also, the computing device 1100 may use an input device or an output device included in another computing device as the input device(s) 1140 or the output device(s) 1150 . Computing device 1100 may also include communication connection(s) 1160 that enable computing device 1100 to communicate with another device (eg, computing device 1300 ).

Here, communication connection(s) 1160 may be a modem, network interface card (NIC), integrated network interface, radio frequency transmitter/receiver, infrared port, USB connection, or other for connecting computing device 1100 to another computing device. It may include interfaces. Also, the communication connection(s) 1160 may include a wired connection or a wireless connection. Each component of the above-described computing device 1100 may be connected by various interconnections such as a bus (eg, peripheral component interconnection (PCI), USB, firmware (IEEE 1394), optical bus structure, etc.) and may be interconnected by a network 1200 . As used herein, terms such as "component," "system," and the like, generally refer to a computer-related entity that is hardware, a combination of hardware and software, software, or software in execution.

For example, a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. For example, both an application running on a controller and a controller may be a component. One or more components may reside within a process and/or thread of execution, and components may be localized on one computer or distributed between two or more computers.

The present invention is not limited by the above embodiments and the accompanying drawings. For those of ordinary skill in the art to which the present invention pertains, it will be apparent that the components according to the present invention can be substituted, modified and changed without departing from the technical spirit of the present invention.

In the above, the present invention has been described in detail with reference to the embodiments, but those of ordinary skill in the art to which the present invention pertains may make various substitutions, additions and modifications within the scope not departing from the technical spirit described above. Of course, it should be understood that such modified embodiments also fall within the protection scope of the present invention as defined by the appended claims below.

100: transparent display device
200: transparent liquid crystal panel
201: data driver
202: gate driver
203: timing controller
210: first protective glass
220: transparent LCD
230: PDLC
240: second protective glass
250: light guide plate
251: LED bar
300: control unit
400: illuminance sensor module

Claims (1)

In the transparent display device manufactured without a backlight and an internal space for providing the backlight on the rear surface of the transparent panel,
The transparent liquid crystal panel includes: a transparent liquid crystal panel from which the backlight and an inner space for providing the backlight are removed;
an illuminance sensor for detecting external illuminance;
a brightness control unit for adjusting the light brightness of the LED bar of the transparent liquid crystal panel according to the detected external illuminance; and
And a control unit for adjusting the brightness of the image displayed on the transparent liquid crystal panel and the transmittance of the light irradiated to the transparent liquid crystal panel,
The transparent liquid crystal panel
a first protective glass;
a transparent LCD adhered to the first protective glass;
a PDLC that is adhered to the LCD and controls the transmittance of the light according to a control signal provided from the outside;
a second protective glass adhered to the PDLC; and
and a light guide plate in contact with the rear surface of the second protective glass and integrally formed with the LED bar provided along an edge line,
The light guide plate is formed with a periodic linear nanopattern having a pitch of 1 nm to 1000 nm,
The periodic linear nanopattern (a linear pattern in which the shape of valleys and mountains is repeatedly formed, a wavy pattern, a curved pattern, and a circular linear pattern having a periodic linear pattern arranged in a form having concentricity) and a triangular-shaped linear pattern, a square-shaped linear pattern, and a hexagonal-shaped linear pattern) have a pitch and a height ratio of 1:0.5 to 10,
A transparent display device, further comprising an image input unit connected to an image input/output terminal of an external image device by a cable.

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