WO2014109533A1

WO2014109533A1 - Lcd device and show window having same

Info

Publication number: WO2014109533A1
Application number: PCT/KR2014/000182
Authority: WO
Inventors: 김대용; 경충현; 안희철
Original assignee: 네오뷰코오롱 주식회사
Priority date: 2013-01-10
Filing date: 2014-01-08
Publication date: 2014-07-17
Also published as: KR20140090888A

Abstract

The present invention relates to an LCD device and a show window having the same, and more specifically, to: an LCD device comprising an OLED lighting unit as a back light unit of a liquid crystal display unit having an LCD, and having a transparent screen formed by using a transparent liquid crystal display unit and a transparent OLED lighting unit; and a show window having the same.

Description

LCD display device and show window having same

The present invention relates to an LCD display device and a show window having the same. Specifically, the LCD unit includes a LED unit as a backlight unit of a liquid crystal display unit provided as an LCD, and transparently includes the LCD unit and the LED display unit. The present invention relates to an LCD display device forming a screen, and a show window having the same.

In general, a liquid crystal display (LCD) is a display device, which is generally provided in various electronic devices, and visually displays information input as an electrical signal on a screen. Units are required, but they are widely used because they consume less power and are convenient to carry.

In addition, in recent years, many technologies have been developed for the LCD, and a transparent LCD using sunlight or an external light as a back light unit is in the spotlight as a next generation display device that can create a new market.

In addition, the backlight unit is a light source device that emits light behind a screen of a display device including an LCD, and the LCD itself does not emit light, so the light entering the front side is reflected back to the mirror behind the liquid crystal, It has a function to adjust the amount and color of the light emitted from the back light, the screen of the LCD can be seen by the backlight unit.

In addition, the backlight unit may be mounted on the top, bottom or left and right of the LCD, the type of CCFL (cold-pole fluorescent lamp), EEFL (external electrode fluorescent lamp), LED (light emitting diode), FFL ( Flat fluorescent lamps) and the like, and may include a diffused light guide plate in which light is evenly spread over the entire LCD screen.

On the other hand, when the LCD is provided as a display device, since the backlight unit is essentially provided, there is a problem in that unnecessary space is consumed by the backlight unit.

In addition, in the case of a mobile terminal having the LCD as a display device, the backlight unit should be mounted in a narrow space of a mechanism, thereby limiting the size and shape of the mobile terminal.

In addition, in the case of various applications that can be equipped with the LCD, there is a problem that generates the size, shape and structural limitations due to the mounting of the backlight unit.

On the other hand, in shops or department stores, etc., the display window is installed to display the products for the advertising of the products to sell and to look at the products displayed from the outside, but the conventional show window is a simple glass window does not provide any additional functions at all There was this.

The present inventors have made efforts to develop alternative lighting that can be applied as a backlight unit of an LCD, consumes less space, and can be provided transparently. As a result, the technical configuration of an LCD display device and a show window having the same can be developed. Thus, the present invention has been completed.

Accordingly, an object of the present invention is to provide an LCD display device which functions as a backlight unit of an LCD and minimizes space consumption, and a show window having the same.

Another object of the present invention is to provide an LCD display device which functions as a backlight unit of an LCD and which can be provided transparently, and a show window having the same.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a display image on the screen, the liquid crystal display having a predetermined transmittance; And an LED lighting unit for emitting light from a rear surface of the liquid crystal display unit and displaying the screen of the liquid crystal display unit from the outside, wherein the LED display unit is transparently formed with a transparent negative electrode. To provide.

The present invention also provides a show window having an LCD display device.

In a preferred embodiment, the touch panel is located on the front or rear of the liquid crystal display, the touch panel unit for detecting a user's touch to generate an electric signal.

In a preferred embodiment, the computing unit for inputting data previously stored in a predetermined storage space as an electrical signal to the liquid crystal display to display the data as a display image on the screen of the liquid crystal display; further includes a.

In an exemplary embodiment, the computing unit may be electrically connected to the LED lighting unit and the touch panel unit, and may be 'ON' or 'OFF' of the LED lighting unit, or may be configured according to an electrical signal output from the touch panel unit. To perform control and processing.

In a preferred embodiment, the five LED lighting unit is provided to emit light in one direction or in both directions.

In a preferred embodiment, the five LED lighting unit includes a transparent LED (TOLED) panel.

In a preferred embodiment, the five LED lighting unit, the substrate; A first electrode formed on the substrate; An organic material layer formed on the first electrode; A second electrode formed on the organic material layer; And a light-transmitting layer formed between at least one of the organic material layer and the second electrode and the upper portion of the second electrode, the light transmitting layer including any one of an oxide-based, nitride-based, salt, and composites thereof. The second electrode is characterized in that the transparent negative electrode.

In a preferred embodiment, the oxide series includes any one of MoO 3, ITO, IZO, IO, ZnO, TO, TiO 2, SiO 2, WO 3, Al 2 O 3, Cr 2 O 3, TeO 2, SrO 2.

In a preferred embodiment, the nitride series includes any one of SiN, AIN.

In a preferred embodiment, the salts include any one of Cs 2 CO 3, LiCO 3, KCO 3, NaCO 3, LiF, CsF, ZnSe.

In a preferred embodiment, the thickness of the light transmitting layer is formed to be less than 0.1nm 100nm.

In an exemplary embodiment, the organic material layer includes an electron transport layer formed by doping any one of metals having low work function and composites thereof to facilitate electron injection from the second electrode.

In a preferred embodiment, the low work function metals include any one of Cs, Li, Na, K, Ca.

In a preferred embodiment, the composites thereof comprise any one of Li-Al, LiF, CsF, Cs2CO3.

In a preferred embodiment, the five LED lighting unit is a TOLED panel showing a transmittance of 70 to 99% according to the wavelength (nm).

In a preferred embodiment, the thickness of the five LED lighting unit is formed to 1.0mm or more and 1.8mm or less.

In a preferred embodiment, the liquid crystal display is provided with a transparent liquid crystal display (LCD).

The present invention has the following excellent effects.

First, according to the LCD display device and the show window provided with the same according to an embodiment of the present invention, since the backlight unit of the liquid crystal display unit includes a thin LED type lighting unit, it consumes space while replacing the conventional backlight unit. Minimal effect can be obtained.

In addition, according to the LCD display device and the show window having the same according to an embodiment of the present invention, since the liquid crystal display and the LED lighting unit can be provided transparently, an effect of forming a transparent LCD screen can be obtained.

1 is a view showing an LCD display device according to an embodiment of the present invention.

2 to 3 is a view showing an example of the LED lighting unit functions as a backlight unit according to an embodiment of the present invention.

Figure 4 is a cross-sectional view showing an LED lighting unit according to an embodiment of the present invention.

The terms used in the present invention were selected as general terms as widely used as possible, but in some cases, the terms arbitrarily selected by the applicant are included. In this case, the meanings described or used in the detailed description of the present invention are considered, rather than simply the names of the terms. The meaning should be grasped.

Hereinafter, with reference to the preferred embodiment shown in the accompanying drawings will be described in detail the technical configuration of the present invention.

However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Like numbers refer to like elements throughout the specification.

1 is a view showing an LCD display device according to an embodiment of the present invention, Figures 2 to 3 are views showing an example of the LED lighting unit functions as a backlight unit according to an embodiment of the present invention.

1 to 3, an LCD display device according to an embodiment of the present invention has an advantage that the space consumption is remarkably less than that of a conventional backlight unit, and has a transparency. In order to provide an LCD display device having alternative lighting that can be applied as a backlight unit, the LCD device includes a liquid crystal display (100), an LED lighting unit (200), a touch panel unit (300), and a computing unit (400). .

The liquid crystal display 100 is for displaying a display image on a screen, preferably an LCD (Liquid Crystal Display), more preferably may be provided with a transparent LCD having a predetermined transmittance.

In addition, the LCD displays a display image including numerals or other arbitrary icons on the screen by using dielectric anisotropy in which the arrangement direction of the liquid crystal is changed by a voltage applied from the outside. Meanwhile, in the case of the LCD, the display image is displayed on the screen while selectively transmitting the light emitted from the backlight unit, which is a device for irradiating light. In addition, a driving IC connected to the touch panel unit 300 and the computing unit 400, which will be described later, may be mounted on the liquid crystal display unit 100.

On the other hand, the LCD can be understood by known techniques, so detailed configuration and the like are omitted.

The LED lighting unit 200 emits light from the rear surface of the liquid crystal display 100 to function as a backlight unit, and preferably allows the screen of the liquid crystal display 100 to be viewed from the outside.

Here, the LED lighting unit 200 is an organic light emitting diode using a self-luminous phenomenon or a phenomenon in which electrons and holes (charged particles corresponding to electrons) injected from a negative electrode and a positive electrode combine in an organic material to emit light It can be provided as an OLED (Organic Light Emitting Diode) panel. Preferably, the negative electrode of the LED lighting unit 200 may be provided as a transparent negative electrode.

In addition, the LED lighting unit 200 may be provided as a transparent organic light emitting diode (TOLED) panel.

In addition, the LED lighting unit 200 may be provided in various forms, but preferably may be formed on the back of the liquid crystal display 100 in a thin film form. Here, the thickness of the LED lighting unit 200 may be formed to 1.0mm or more and 1.8mm or less.

Therefore, while the LED lighting unit 200 functions as a backlight unit of the liquid crystal display 100, the consumption of space due to the LED lighting unit 200 is minimized.

On the other hand, the LED lighting unit 200 may be provided in a structure that emits light only in one direction, preferably may be provided to emit light in both directions. This is more preferable when both the LED lighting unit 200 and the liquid crystal display unit 100 are transparent.

That is, the LED lighting unit 200 in the form of a thin film may be provided with a structure capable of emitting light to the front surface and also light to the rear surface, and the light emitted may be adjusted according to the characteristics of the negative electrode.

The touch panel unit 300 is for detecting a user's touch, and is preferably provided at the front of the liquid crystal display 100. In addition, the touch panel unit 100 detects a user's touch and generates an electric signal, and the electric signal is output to the computing unit 400 to be described later.

Here, the touch panel unit 300 is a capacitive method for detecting a voltage difference between the XY electrode patterns by, for example, the analyzer is pressed by a pen or a hand, and the conductive film is pressed by the force to be in contact with the XY electrode pattern. It may be an input device for generating a signal electrical signal by.

In addition, the touch panel unit 300 may be positioned on the rear surface of the liquid crystal display unit 100. In this case, the touch panel unit 300 may be located between the liquid crystal display unit 100 and the ODL illumination unit 200. .

The computing unit 400 inputs data previously stored in a predetermined storage space to the liquid crystal display unit 100 as an electric signal so that the data is displayed as a display image on the screen of the liquid crystal display unit 100. The liquid crystal display 100, the LED lighting unit 200, and the touch panel unit 300 are electrically connected to the liquid crystal display unit 100, the LED lighting unit 200, and the touch panel unit 300. It may be provided to control.

In addition, the computing unit 400 is, for example, 'on' or 'off' the OLED lighting unit 200, or is provided to perform the control and processing according to the electrical signal output from the touch panel unit 300. . In this case, the control and processing performed by the computing unit 400 may display a display image on the screen of the liquid crystal display unit 100 according to an electrical signal generated by the touch panel unit 300, or may store data previously stored in a storage space. It includes a variety of electronic controls and processing, such as calling.

In addition, the computing unit 400 is substantially formed in a separate space from the liquid crystal display unit 100, the LED lighting unit 200 and the touch panel unit 300, or the CPU or MCU of the electronic device, While being provided as an MPU or the like, the liquid crystal display 100, the LED lighting unit 200, and the touch panel 300 may be electrically connected to perform control and processing.

On the other hand, the LCD display device according to an embodiment of the present invention, for example, can be applied to a mobile terminal including a smart phone, a mobile phone, functions as a backlight unit, the LED lighting unit 200 with less space consumption Since the narrow spatial constraints of the mobile terminal can be eliminated, and if the liquid crystal display 100 and the LED lighting unit 200 is provided transparently, the screen of the mobile terminal can be formed transparent and external The subject may be checked through the screen of the mobile terminal.

In addition, the LCD display device according to an embodiment of the present invention is transparently provided with the liquid crystal display unit 100 and the LED display unit 200 is a show window which is installed to look at the goods displayed in the store or department store from the outside In the case of applying to the show window, the products may be exposed even at night by emitting light, or the displayed products may be displayed while displaying information or an advertisement image on the displayed products. Maximize the effect of advertising on products.

Of course, the LCD display device according to an embodiment of the present invention can be applied to various electronic devices that can use the LCD as a screen.

4 is a cross-sectional view showing an LED lighting unit according to an embodiment of the present invention.

Referring to FIG. 4, an LED lighting unit of an LCD display device according to an embodiment of the present invention includes a substrate 205, a first electrode 210, a second electrode 220, an organic material layer 230, and a light transmitting layer ( 240) and the like.

The substrate 205 supports the first electrode 210, the second electrode 220, the organic layer 230, and the light transmitting layer 240. The substrate 205 uses a glass material or a plastic material having transparency to allow light emitted therethrough.

The first electrode 220 is also commonly referred to as a lower electrode, and is formed on the substrate 205. In addition, the first electrode 210 is an anode, which is an anode (+), and a substrate (by a thermal deposition method using a sputtering method, an ion plating method, an electron gun, or the like). 205 is formed. Here, although the first electrode 210 according to the embodiment of the present invention uses a permeable indium tin-oxide electrode, a permeable phosphorus-zinc oxide electrode may be used. .

The second electrode 220 is also commonly referred to as an upper electrode facing the first electrode 210 and is formed on the organic material layer 230. In addition, the second electrode 220 is a cathode which is a cathode opposite to the first electrode 210 that is an anode (+). The second electrode 220 selects and uses any one of silver (Ag), aluminum (Al), and magnesium-silver (Mg: Ag) alloys, which are transparent metals.

The organic layer 230 is interposed between the first electrode 210 and the second electrode 220 to emit light by energization between the first electrode 210 and the second electrode 220. In addition, the organic layer 230 is a hole injection layer (HIL) 231, a hole transporting layer (HTL) so as to emit light by energization between the first electrode 210 and the second electrode 220 ) 232, an emission layer (EML) 233, an electron transporting layer (ETL) 234, and an electron injection layer (EIL) 235.

The organic layer 230 may include a spin coating method, a thermal evaporation method, a spin casting method, a sputtering method, an e-beam evaporation method, and a chemical vapor phase. It is interposed between the first electrode 210 and the second electrode 220 by a chemical vapor deposition (CVD) method.

In addition, the hole injection layer 231 serves to inject holes from the first electrode 210, and the hole transfer layer 232 is a hole injected from the hole injection layer 231 is the second electrode 220. It plays a role of hole movement to meet electron of.

In addition, the electron injection layer 235 serves to inject electrons from the second electrode 220, and the electron transfer layer 234 has electrons injected from the electron injection layer 235 in the hole transport layer 232. It serves as a movement path of electrons to meet in the light-emitting layer 233 and holes moving from.

In addition, the electron transport layer 234 may be formed by doping any one of metals and composites having a low work function to facilitate electron injection from the second electrode 220, which is electron injection. All may be applied with or without layer 235.

Here, the metals having a low work function may include Cs, Li, Na, K, Ca, and the like, and the complex thereof may include Li-Al, LiF, CsF, Cs2CO3, and the like.

In addition, the emission layer 233 is interposed between the hole transport layer 232 and the electron transport layer 234 to emit light by holes from the hole transport layer 232 and electrons from the electron transport layer 234. That is, the light emitting layer 233 emits light by holes and electrons that meet at the interface with the hole transport layer 232 and the electron transport layer 234, respectively.

The light transmitting layer 240 may be formed between at least one of the organic layer 230 and the second electrode 220 and the upper portion of the second electrode 220. For example, the light transmitting layer 240 may be formed on both the top and bottom surfaces of the second electrode 220, or may be formed on only one of the bottom and top surfaces of the second electrode 220.

In addition, in one embodiment of the present invention, a configuration in which the light transmitting layer 240 is formed on both the upper surface and the lower surface with the second electrode 220 therebetween is illustrated, but is not limited thereto, and the lower surface of the second electrode 220 and Of course, the configuration formed only on any one of the upper surfaces can be equally applied.

In addition, the light transmission layer 240 is a first light transmission layer 241 formed between the organic layer 230 and the second electrode 220, and a second light transmission layer 242 formed on the second electrode 220. ) May be included.

Preferably, the first light transmission layer 241 may be formed between the electron injection layer 235 and the second electrode 220 of the organic material layer 230, or may be formed on the electron injection layer 235 itself. In addition, the second light transmission layer 242 may be stacked on an upper surface of the second electrode 220 opposite to the first light transmission layer 241.

Here, the light transmitting layer 240 functions to allow the second electrode 220 to have a high transmittance while having a transmittance. In addition, the light transmitting layer 240 is formed of a thin film to reduce the sheet resistance of the second electrode 220, thereby preventing the performance degradation of the TOLED panel 20.

In addition, the light transmitting layer 240 of the present invention may include any one of oxide-based, nitride-based, salts, and complexes thereof. Here, the oxide series may include MoO 3, ITO, IZO, IO, ZnO, TO, TiO 2, SiO 2, WO 3, Al 2 O 3, Cr 2 O 3, TeO 2, SrO 2, and the like. In addition, the nitride series may include SiN, AIN, and the like. In addition, the salts may include Cs 2 CO 3, LiCO 3, KCO 3, NaCO 3, LiF, CsF, ZnSe and the like.

As described above, when the oxide-based, nitride-based, salts, and composites of the light-transmitting layer 240 are used, they have excellent transmittance and luminance effects. However, in addition to the above materials, the second electrode 220 All materials may be included to have a high transmittance while having a permeability.

In addition, although the first light transmitting layer 241 and the second light transmitting layer 242 are made of the same material, the light transmitting layer 240 may be made of different materials. For example, the first light transmitting layer 241 may include an oxide series, and the second light transmitting layer 242 may include a nitride series, salts, or a combination thereof. Alternatively, the first light transmission layer 241 may include a nitride series, and the second light transmission layer 242 may include an oxide series, salts, or a combination thereof. Alternatively, the first light transmitting layer 241 may include salts, and the second light transmitting layer 242 may include an oxide based layer, a nitride based layer, or a combination thereof.

On the other hand, the thickness of the light transmitting layer 240 is preferably formed in less than 0.1nm 100nm. When explaining the reason for limiting the thickness value of the light-transmitting layer 240, for example, the transmittance is increased when the thickness of the light-transmitting layer 240 is less than 0.1nm, but the resistance also increases in proportion to the TOLED panel 20 Degrades performance.

On the other hand, when the thickness of the light transmitting layer 240 becomes larger than 100 nm, the resistance decreases and performance deterioration does not occur, but the transmittance decreases as the thickness of the light transmitting layer 240 increases. In addition, the light transmitting layer 240 according to the embodiment of the present invention is preferably formed by thermal evaporation.

As described above, the present invention has been illustrated and described with reference to preferred embodiments, but is not limited to the above-described embodiments, and is provided to those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.

100: liquid crystal display 200: OLED lighting unit

205: substrate 210: first electrode

220: second electrode 230: organic material layer

231: hole injection layer 232: hole transport layer

233 light emitting layer 234 electron transport layer

235 electron injection layer 240 light transmitting layer

241: first light transmitting layer 242: second light transmitting layer

300: touch panel unit 400: computing unit

Claims

A liquid crystal display which displays a display image on a screen and has a predetermined transmittance;

And an LED lighting unit which emits light from the rear side of the liquid crystal display and makes the screen of the liquid crystal display visible from the outside.

The LED display device, characterized in that the transparent LED including a transparent negative electrode.
The method of claim 1,

And a touch panel unit positioned at the front or the rear of the liquid crystal display unit and configured to detect a user's touch and generate an electric signal.
The method of claim 2,

And a computing unit configured to input data previously stored in a predetermined storage space as an electrical signal to the liquid crystal display to display the data as a display image on the screen of the liquid crystal display.
The method of claim 3, wherein

The computing unit may be electrically connected to the LED lighting unit and the touch panel unit to 'on' or 'off' the LED lighting unit, or to perform control and processing according to an electrical signal output from the touch panel unit. LCD display device, characterized in that provided.
The method of claim 1,

The LED display, the LCD display device, characterized in that provided to emit light in one direction or in both directions.
The method of claim 1,

The LED display unit, LED display device characterized in that it comprises a transparent LED (TOLED) panel.
The method of claim 1,

The OLED lighting unit,

Board;

A first electrode formed on the substrate;

An organic material layer formed on the first electrode;

A second electrode formed on the organic material layer; And

And a light-transmitting layer formed between at least one of the organic material layer and the second electrode and the upper portion of the second electrode, the light transmitting layer including any one of oxide-based, nitride-based, salts, and composites thereof.

And the second electrode is the transparent negative electrode.
The method of claim 7, wherein

The oxide-based LCD device including any one of MoO 3, ITO, IZO, IO, ZnO, TO, TiO 2, SiO 2, WO 3, Al 2 O 3, Cr 2 O 3, TeO 2, SrO 2.
The method of claim 7, wherein

The nitride series of the LCD display device comprising any one of SiN, AIN.
The method of claim 7, wherein

The salt is an LCD display device including any one of Cs2CO3, LiCO3, KCO3, NaCO3, LiF, CsF, ZnSe.
The method of claim 7, wherein

The thickness of the light transmitting layer is an LCD display device, characterized in that formed in less than 0.1nm 100nm.
The method of claim 7, wherein

And the organic material layer includes an electron transport layer formed by doping any one of metals having low work function and composites thereof to facilitate electron injection from the second electrode.
The method of claim 12,

The metal having a low work function is an LCD display device including any one of Cs, Li, Na, K, Ca.
The method of claim 12,

The complex of these LCD display device including any one of Li-Al, LiF, CsF, Cs2CO3.
The method of claim 7, wherein

The LED display unit, the LED display device, characterized in that the TOLED panel showing a transmittance of 70 to 99% according to the wavelength (nm).
The method of claim 7, wherein

The OLED display, the thickness of the LCD display device, characterized in that formed in more than 1.0mm 1.8mm.
The method of claim 1,

The liquid crystal display, LCD display device characterized in that provided with a transparent liquid crystal (LCD).
A show window comprising an LCD display device according to any one of claims 1 to 17.