CN210668423U - Display device and liquid crystal display device - Google Patents

Abstract

The utility model relates to a display device and a liquid crystal display device, the display device comprises a liquid crystal panel and a backlight unit attached to the back of the liquid crystal panel, the backlight unit comprises a substrate, an anode conducting layer, an organic light-emitting material layer and a cathode conducting layer which are sequentially connected from bottom to top; the liquid crystal display device includes the above-described display device. The utility model provides a backlight unit provides the backlight for liquid crystal display panel, has replaced traditional LED backlight unit, makes display device whole more frivolous, has improved display device's screen and has accounted for the ratio to overcome the limited defect is used to the OLED device that brings because of traditional OLED device manufacturing cost is high, the productivity is low, and improved the production efficiency of OLED device.

Description

Display device and liquid crystal display device

Technical Field

The utility model relates to a show technical field, especially relate to a display device and liquid crystal display device.

Background

With the development of the information-oriented society, various types of display devices for displaying images are increasingly demanded, and various types of display devices, such as liquid crystal display devices, plasma liquid crystal panel devices, and organic light emitting diode devices, have been widely used in human lives, studies, and works.

The traditional liquid crystal display device generally adopts an LCD screen and an LED backlight module to be combined, but in light emitted by an LED, the blue light content is more, so that the blue light harm can be caused, and the traditional liquid crystal display device is limited by a light mixing area of the backlight module, so that the screen occupation ratio is lower, the display device is gradually replaced by an OLED screen without the backlight module, but the manufacturing cost of the OLED screen is higher, the production capacity is lower, and the application of the OLED display device is limited.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a display device and a liquid crystal display apparatus, so as to overcome the defects of high production cost and low productivity of the conventional display device.

The utility model provides a technical scheme that above-mentioned technical problem adopted is:

the utility model provides a display device, include liquid crystal display panel and laminate in the backlight unit at liquid crystal display panel back, backlight unit includes substrate, positive pole conducting layer, organic light emitting material layer and the negative pole conducting layer that from the bottom up connected gradually, still includes first metal conducting layer and second metal conducting layer, first metal conducting layer is located between positive pole conducting layer and the organic light emitting material layer, second metal conducting layer is located the organic light emitting material layer with between the negative pole conducting layer.

In a preferred embodiment, the organic light emitting material layer includes a first light emitting unit layer and a second light emitting unit layer, and an intermediate layer is disposed between the first light emitting unit layer and the second light emitting unit layer.

In a preferred embodiment, the first light emitting unit layer comprises a first hole transport layer, a first organic light emitting layer, a first electron transport layer and a first electron injection layer which are sequentially stacked from bottom to top; the second light-emitting unit layer comprises a second hole transport layer, a second organic light-emitting layer, a second electron transport layer and a second electron injection layer which are sequentially stacked from bottom to top.

In a preferred embodiment, the anode conductive layer and the cathode conductive layer are transparent conductive oxide films; the first metal conducting layer is made of silver, silver alloy, aluminum alloy, copper or copper alloy; the second metal conducting layer is one or more of a magnesium indium alloy film, a silver film, a copper alloy film, an aluminum film and an aluminum alloy film.

In a preferred embodiment, the protective layer is disposed above the cathode conductive layer, and the protective layer is one or more of a silicon compound film, an aluminum oxide film, a nickel alloy film, and a copper alloy film.

In a preferred embodiment, the liquid crystal display further comprises a protective base layer attached to the surface of the liquid crystal panel.

In a preferred embodiment, the liquid crystal panel includes a liquid crystal layer, and a first polarizer and a second polarizer disposed on both sides of the liquid crystal layer.

The utility model also provides a liquid crystal display device, including foretell display device.

The utility model discloses following beneficial effect has at least:

the utility model provides a backlight unit provides the backlight for liquid crystal display panel, has replaced traditional LED backlight unit, makes display device whole more frivolous, has improved display device's screen and has accounted for the ratio to overcome the limited defect is used to the OLED device that brings because of traditional OLED device manufacturing cost is high, the productivity is low, and improved the production efficiency of OLED device.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic diagram of a structure of one embodiment of a display device;

FIG. 2 is a schematic diagram of the structure of one embodiment of a layer of organic light emitting material;

FIG. 3 is a schematic diagram of an embodiment of a liquid crystal panel.

Detailed Description

The conception, specific structure and technical effects of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, so as to fully understand the objects, aspects and effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the description of the upper, lower, left, right, etc. used in the present invention is only relative to the mutual positional relationship of the components of the present invention in the drawings.

Furthermore, 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. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.

Referring to fig. 1, the display device in this embodiment includes a liquid crystal panel 10 and a backlight unit 20 attached to the back of the display device, wherein the backlight unit 20 provides a backlight source for the liquid crystal panel 10. The backlight unit 20 includes a substrate 21, an anode conductive layer 22, an organic light emitting material layer 23, and a cathode conductive layer 24, which are sequentially connected from bottom to top. The substrate 21 is made of a transparent material and serves as a mounting base for other elements, and the anode conductive layer 22 and the cathode conductive layer 24 serve to conduct electricity to the organic light emitting material and transmit an external electric field to the organic light emitting material layer 23, thereby causing the organic light emitting material layer 23 to emit light.

By attaching the liquid crystal panel 10 and the backlight unit 20, the backlight unit 20 provides a backlight source for the liquid crystal panel 10, and replaces a traditional LED backlight module, so that the whole display device is lighter and thinner, the defect that the application of the OLED device is limited due to high production cost and low productivity of the traditional OLED device is overcome, and the production efficiency of the OLED device is improved. Moreover, because the thickness of each layer of material in the backlight unit 20 is in the nanometer or micron level, the thickness of the formed backlight unit 20 is smaller and is not more than 0.3mm, so that the whole display device is thinner and thinner, and the use performance of the display device is optimized.

Preferably, the substrate 21 may be made of glass, polyimide, PI (plastic material) or PTE (polyethylene terephthalate); the anode conductive layer 22 and the cathode conductive layer 24 are both transparent conductive oxide films, such as one of ITO films, AZO films, GZO films, GAZO films, IZO films, and IZTO films.

The anode conductive layer 22 and the cathode conductive layer 24 have a film thickness of 5-50nm, a refractive index of 1.9-2.0, a visible light transmittance of 85% or more, and a resistivity of less than 5x10^-3Ωcm。

Preferably, a first metal conductive layer 25 is further disposed between the anode conductive layer 22 and the organic light emitting material layer 23, and a second metal conductive layer 26 is further disposed between the organic light emitting material layer 23 and the cathode conductive layer 24, so as to improve the conductive efficiency to the organic light emitting material layer 23. The first metal conductive layer 25 is silver, silver alloy, aluminum alloy, copper or copper alloy; the second metal conductive layer 26 is one or more of a magnesium-silver alloy thin film, a silver alloy thin film, a copper alloy thin film, an aluminum thin film, and an aluminum alloy thin film.

Referring to fig. 2, the organic light emitting material layer 23 is a POLED (polymer organic light emitting diode) structure or a SMOLED (low molecular organic light emitting diode) structure, the organic light emitting material layer 23 includes a first light emitting unit layer 231 and a second light emitting unit layer 232, an intermediate layer 233 for supplying electric charges is disposed between the first light emitting unit layer 231 and the second light emitting unit layer 232, and the intermediate layer 233 may be replaced by an electrode or a material having a similar function. Under the regulation of the applied electric field, the intermediate layer 233 can generate electrons and holes, and the generated electrons and holes are combined with holes injected from the anode and electrons injected from the cathode, respectively, in the first light emitting unit layer 231 and the second light emitting unit layer 232 to emit light. The organic light emitting material layer 23 has uniform light emission, the uniformity can reach 100%, and the display device can meet the light emission uniformity index.

Preferably, the first light emitting unit layer 231 is formed by stacking a first hole injection layer 2311, a first hole transport layer 2312, a first organic light emitting layer 2313, a first electron transport layer 2314 and a first electron injection layer 2315 from bottom to top; the second light emitting unit layer 232 is formed by stacking a second hole injection layer 2321, a second hole transport layer 2322, a second organic light emitting layer 2323, a second electron transport layer 2324 and a second electron injection layer 2325 from bottom to top. The first hole injection layer 2311, the first hole transport layer 2312, the first organic light emitting layer 2313, the first electron transport layer 2314 and the first electron injection layer 2315 are stacked in this order from bottom to top by using an evaporator, so that the first light emitting unit layer 231 is plated, and the second light emitting unit layer 232 is plated in the same manner as the first light emitting unit layer 231.

Preferably, the protective layer 27 is further included, the protective layer 27 is attached above the cathode conductive layer 24, and the protective layer 27 is any one or more of a silicon oxide film, a silicon nitride film, an aluminum oxide film, an aluminum nitride film, a titanium oxide film and a titanium nitride film. Improve the weatherability of cathode metal motor through setting up protective layer 27, reduce the difficult degree of encapsulation, do benefit to OLED's volume production and reduction in production cost.

Before the backlight unit 20 is processed, the substrate 21 is pre-processed, including static electricity removal, ion beam bombardment, heating and degassing, and the like, and is coated layer by layer. The backlight unit 20 can be processed by an evaporator and a sputtering machine, and the processing technology is simple, reduces the production cost of the display device, and has high production efficiency. And the backlight unit 20 basically has no light mixing area, so that the screen ratio of the display device is larger, and the display effect of the display device is improved.

The display device in this embodiment further includes a protective base layer 30, the protective base layer 30 is located on the upper surface of the liquid crystal panel 10, and the protective base layer 30 may be a glass panel or a protective film, so as to prevent the liquid crystal panel 10 from being scratched or damaged and affecting the display effect of the display device.

The liquid crystal panel 10 includes a first polarizing plate 11 and a second polarizing plate 12, and a liquid crystal layer 13 formed between the first polarizing plate 11 and the second polarizing plate 12. The liquid crystal layer 13 can change the polarization state of light, and enables unidirectional light to be emitted from the first polarizer 11 through the action of the first polarizer 11 and the second polarizer 12, so as to improve the brightness of the display area of the display device. A filter 14 is disposed between the first polarizer 11 and the liquid crystal layer 13, and is used for adjusting the color and brightness of light emitted from the liquid crystal layer 13.

Preferably, the liquid crystal panel 10 includes a touch functional module, and the touch functional module is embedded in a liquid crystal pixel of the liquid crystal panel 10, or embedded in the optical filter 14, the first polarizer 11, or the second polarizer 12, so as to analyze and identify the induced contact signal, thereby achieving a corresponding operation purpose of the display device.

The protective substrate 30 and the liquid crystal panel 10 may be bonded and fixed by OCA optical cement.

The backlight unit 20 and the liquid crystal panel 10 are both connected with a circuit board, and the circuit board is electrically connected with other functional modules to switch the working states of the backlight unit 20 and the liquid crystal panel 10, so that the display device achieves different display effects.

The utility model also provides a liquid crystal display device, including foretell display device, this liquid crystal display device can be other application display device's such as LCD TV, liquid crystal computer, cell-phone equipment.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims (8)

1. The utility model provides a display device, its characterized in that, including liquid crystal display panel and laminate in the unit in a poor light at liquid crystal display panel back, the unit in a poor light includes substrate, positive pole conducting layer, organic light emitting material layer and the negative pole conducting layer that from the bottom up connected gradually, still includes first metal conducting layer and second metal conducting layer, first metal conducting layer is located between positive pole conducting layer and the organic light emitting material layer, second metal conducting layer is located the organic light emitting material layer with between the negative pole conducting layer.

2. The display device according to claim 1, wherein the organic light emitting material layer comprises a first light emitting unit layer and a second light emitting unit layer with an intermediate layer disposed therebetween.

3. The display device according to claim 2, wherein the first light emitting unit layer comprises a first hole transport layer, a first organic light emitting layer, a first electron transport layer and a first electron injection layer which are stacked in this order from bottom to top; the second light-emitting unit layer comprises a second hole transport layer, a second organic light-emitting layer, a second electron transport layer and a second electron injection layer which are sequentially stacked from bottom to top.

4. The display device according to claim 1, wherein the anode conductive layer and the cathode conductive layer are each a transparent conductive oxide thin film; the first metal conducting layer is made of silver, silver alloy, aluminum alloy, copper or copper alloy; the second metal conducting layer is one or more of a magnesium indium alloy film, a silver film, a copper alloy film, an aluminum film and an aluminum alloy film.

5. The display device according to claim 1, further comprising a protective layer disposed over the cathode conductive layer, wherein the protective layer is one or more of a silicon compound film, an aluminum oxide film, a nickel alloy film, and a copper alloy film.

6. The display device according to claim 1, further comprising a protective base layer attached to a surface of the liquid crystal panel.

7. The display device according to claim 1, wherein the liquid crystal panel comprises a liquid crystal layer, and a first polarizing plate and a second polarizing plate disposed on both sides of the liquid crystal layer.

8. A liquid crystal display device comprising the display device according to any one of claims 1 to 7.

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