KR102456595B1 - A transparent diplay device for a vehicle - Google Patents

Abstract

A transparent display device for a vehicle according to an embodiment of the present invention is formed for electrical connection of a base substrate, a plurality of micro LED chips arranged on the base substrate, and the micro LED chips, and is formed only on one side of the base substrate It includes an electrode wiring formed to be connected to an external power source. According to one embodiment of the present invention, there is an effect that information can be provided to the user by being displayed in the same viewing range without obstructing the viewing range of the driver in front of the vehicle.

Description

A transparent display device for a vehicle {A transparent display device for a vehicle}

The present invention relates to a transparent display device for a vehicle.

In general, flat panel display devices include a liquid crystal display (LCD), a plasma display panel (PDP), a projection type transparent display device, an organic light-emitting diode (OLED), and the like. LCD and PDP are currently widely used in TV, navigation, DMB receiver, etc., but display an image using an opaque glass substrate.

Such display devices using display elements such as LCD and PDP are installed on the dashboard or in the corner of the driver's seat so as not to interfere with driving. There was a problem that there was a constant risk of safety accidents.

In addition, even in the case of a transparent display that increases the transmittance, the structural limitations of electrical connection, the problem of electrical efficiency due to the adoption of transparent materials, and various factors according to the applied device or environment when implemented in a basic thin film form The need to effectively maintain durability has emerged.

KR 2016-0150487 A

SUMMARY OF THE INVENTION An object of the present invention is to provide a transparent display device for a vehicle capable of displaying information at the same position in a driving direction without obstructing the driver's view in front of the vehicle.

In addition, in order to make the unnecessary opaque area due to electrical connection to the minimum position and area that does not interfere with the visibility of the display when placed on the front and rear glass of the vehicle, the electrical wiring is the outermost of the driver's visibility range and the vehicle power connection and An object of the present invention is to provide a transparent display device for a vehicle disposed on one side, which is a minimum distance.

The transparent display device for a vehicle according to an embodiment of the present invention is formed for electrical connection of a base substrate, a plurality of micro LED chips arranged on the base substrate, and the micro LED chips, and is formed only on one side of the base substrate It includes an electrode wiring formed to be connected to an external power source.

Here, it may further include an electrically conductive contact electrode formed on the base substrate and contact-coupled to a wider corresponding surface on the lower surface of the LED chip.

In addition, the plurality of micro LED chips are respectively arranged in a longitudinal direction corresponding to one side of the base substrate and a transverse direction crossing the longitudinal direction, and the electrode wiring is electrically connected to the contact electrode, It may include a first electrode wiring that electrically connects the LED chips formed in the direction to each other and a second electrode wiring that is connected to the contact electrodes of each of the LED chips in the longitudinal direction to extend on one side of the base substrate.

In addition, the mutual arrangement interval of the plurality of micro LED chips in the longitudinal direction and the transverse direction may be formed in a range of 150㎛ to 500㎛.

In addition, the plurality of micro LED chips may have a size of 30×30 to 100×100 μm.

In addition, the first electrode wiring and the second electrode wiring may be made of a conductive metal, and a matte organic material may be coated on the upper surface.

In addition, the first electrode wiring and the second electrode wiring may be formed in a mesh pattern made of a conductive metal.

In addition, the first electrode wiring and the second electrode wiring are electrically insulated from each other, and the patterns of the first electrode wiring and the second electrode wiring correspond to the pattern of the first electrode wiring and the second electrode wiring other than the region where the first electrode wiring and the second electrode wiring are formed. It may further include a dummy pattern formed on the base substrate so as to extend to the pattern.

In addition, the first electrode wiring, the second electrode wiring, and the dummy pattern are formed of the same material, and the first electrode wiring, the second electrode wiring, and the dummy pattern are spaced apart by a predetermined distance to include an electrical short circuit. can

The features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

Prior to this, the terms or words used in the present specification and claims should not be construed in a conventional and dictionary meaning, and the inventor may properly define the concept of the term to describe his invention in the best way. Based on the principle that there is, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

According to one embodiment of the present invention, there is an effect that information can be provided to the user by being displayed in the same viewing range without obstructing the viewing range of the driver in front of the vehicle.

In addition, it is possible to improve the durability of the display device by arranging micro-unit LED chips on the base substrate. There is an effect of improving the visibility of the transparent display device.

In addition, by applying a matt organic material on the electrode wiring for the electrical wiring on the base substrate, there is an effect of reducing the reflectance due to the metal and improving the visibility of the transparent display device.

In addition, by forming the bezel part, which is the external power connection part of the electrode wiring that makes the electrical connection of the LED chip on the base substrate, to be disposed only at one end, the visibility range is effectively secured when disposed on the front or rear glass of the vehicle, and at the same time, the external power supply There is an effect that the electrical connection can be implemented more efficiently.

1 is a schematic plan view of a transparent display device for a vehicle according to an embodiment of the present invention;
2 is a partial plan view of a transparent display device for a vehicle according to an embodiment of the present invention;
3 is an enlarged view of a portion of FIG. 2
4 is a cross-sectional view taken along line C-C' of FIG. 2;
5 is a cross-sectional view of a transparent display device for a vehicle according to an embodiment of the present invention;

The objects, specific advantages and novel features of one embodiment of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. In addition, terms such as "one side", "the other side", "first", "second" are used to distinguish one component from another component, and the component is limited by the terms not. Hereinafter, in describing an embodiment of the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of an embodiment of the present invention will be omitted.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals indicate like members.

1 is a schematic plan view of a transparent display device for a vehicle 1 according to an embodiment of the present invention, FIG. 2 is a partial plan view of a transparent display device for a vehicle 1 according to an embodiment of the present invention, and FIG. 3 is a diagram of FIG. An enlarged view of a portion, FIG. 4 is a cross-sectional view taken along line C-C′ of FIG. 2 , and FIG. 5 is a cross-sectional view of the transparent display device 1 for a vehicle according to an embodiment of the present invention.

A transparent display device for a vehicle according to an embodiment of the present invention (1), a base substrate (10), a plurality of micro LED chips (20) arranged on the base substrate (10), and the micro LED chip (20) It is formed for electrical connection and includes an electrode wiring 22 formed so that the external power source 40 is connected only on one side of the base substrate 10 .

The transparent display device 1 for a vehicle according to an embodiment of the present invention may be disposed on a front window or a rear window of a general vehicle. By arranging the display device 1 within the viewing range of the front side, the driver can check the necessary information through the vehicle display device 1 even while driving or stopping within the range that is not obstructed by the front view.

As such, the transmittance of the transparent display device 1 should be at least 50% or more so as not to obstruct the front view while being disposed within the viewing range of the driver riding in the vehicle, and the base substrate 10 of the transparent display device 1 is also It is preferable to select a transparent material or a material having a visible light transmittance of at least 50% or more.

Specifically, polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene naphthalate (PEN), polyether sulfone (PES), cyclic olefin polymer (COC), TAC (Triacetylcellulose) ) film, polyvinyl alcohol (PVA) film, polyimide (PI) film, polystyrene (PS), biaxially oriented polystyrene (K-resin containing biaxially oriented PS; BOPS), glass or tempered glass, etc. It is preferable to form In addition, in order to improve the adhesion of the electrode wiring 22 or the dummy pattern 50, which will be described later, formed on the base substrate 10, a high frequency treatment or a primer treatment is performed on one surface of the base substrate 10. A surface treatment layer may be formed.

As shown in FIG. 1 , the micro LED chip 20 is arranged on the base substrate 10 in the transverse and longitudinal directions to implement a display. The LED chip 20 has a size of a micro unit, and a display can be implemented with at least three LED chips 20 (red, green and blue LEDs) on the base substrate 10 .

The size of the LED chip 20 is implemented in a micro-scale with a length of a × a' of 30 × 30 μm to 100 × 100 μm, so that a set of pixels capable of outputting an image on a display can be implemented. The LED chip 20 may be arranged in a range of 150 μm to 500 μm in consideration of a resolution for realizing a display in the vertical or horizontal direction. If the spacing is less than 150㎛, it may affect the structure and driving reliability of the electrical connection, and if it exceeds 500㎛, it is because it is difficult to properly implement the display resolution may significantly reduce the visibility of the user.

The LED chip 20 may be laminated to be electrically connected to the contact electrode 21 , which is a conductive metal electrode formed on the base substrate 10 (see FIG. 4 ). The contact electrode 21 is formed to be wider than the corresponding area to which the LED chip 20 is coupled, so that light efficiency can be effectively improved. The LED chip 20 is formed on the contact electrode 21 , and through the contact electrode 21 , an electrical connection circuit with an external power source or a separate power source can be electrically implemented by using an electrode wiring 22 to be described later.

As shown in FIG. 2 , the electrode wiring 22 is connected to each LED chip 20 for electrical connection of the LED chip 20 and is connected to an external power source 40 . In one embodiment of the present invention, the electrode wiring 22 of the LED chip 20 is connected to an external power source only on one side of the base substrate 10 by forming the bezel part 30 on the front or rear window of the vehicle. It is possible to implement a more stable structure of electrical connection within a range that does not obstruct the driver's field of vision.

The electrode wiring 22 is configured to be individually electrically connected to the first electrode wiring 22a for electrical connection between each LED chip 20, and for electrical connection of each LED chip 20 to an external power source. By including the second electrode wiring 22b, it is connected to (+) and (-) poles so that ON/OFF control can be implemented in a circuit.

The electrode wiring 22 is formed of a conductive metal material for conduction, and includes copper (Cu), aluminum (Al), gold (Au), silver (Ag), titanium (Ti), palladium (Pd), and chromium (Cr). ) or a combination thereof may be used to form a mesh pattern.

Specifically, as shown in FIG. 3 , the first electrode wiring 22a and the second electrode wiring 22b for electrical connection of the LED chip 20 are formed in a mesh pattern, and at the same time, the first electrode wiring ( By forming a dummy pattern 50 having the same regular arrangement so as to extend to the mesh pattern of 22a) and the second electrode wiring 22b on the remaining area of the base substrate 10, the visibility of the electrode wiring 22 can be effectively improved. can be reduced.

The dummy pattern 50 may be formed of the same metal material as the electrode wiring 22, and in this case, an electrical short circuit 23 between the first electrode wiring 22a and the second electrode wiring 22b (Fig. As shown in Fig. 3, the reliability of the electrical connection between the first electrode wiring 22a and the second electrode wiring 22b can be secured by forming an electrical short circuit by providing a space between the patterns).

In addition, the dummy pattern 50 may be formed of an insulating material from the beginning for an electrically independent structure from the first electrode wiring 22a and the second electrode wiring 22b. When the dummy pattern 50 is formed of an insulating material, a separate electrical short-circuit part 23 is not provided, and there is an advantage that the problem of electrical connection does not occur even if the pattern is continuously extended.

In addition, since the dummy pattern 50 is not a structure that makes an electrical connection, it is insulated on a region other than the electrode wiring 22 for actual electrical connection using an insulating material or a space away from the above-described contact electrode 21 . is formed with

When the electrode wiring 22 and the dummy pattern 50 are formed of a metal material, a black organic material may be applied to effectively reduce visibility due to the reflection characteristics of the metal due to light. In addition, when the electrode wiring 22 and the dummy pattern 50 are formed of copper (Cu), the blackening treatment can effectively reduce the visibility due to the reflection characteristics of the metal due to the light. Blackening treatment is to oxidize the copper surface to precipitate Cu2O or CuO. Cu2O is brown in color, so it is called Brown Oxide, and CuO is black in color, so it is called Black Oxide. As described above, by blackening the surfaces of the electrode wiring 22 and the dummy pattern 50 , it is possible to prevent light from being reflected, and thus the overall visibility of the display device 1 can be improved.

As shown in FIG. 5 , the transparent display device 1 for a vehicle according to an embodiment of the present invention may further include a protective layer 60 on the LED chip 20 .

The protective layer 60 is to effectively protect the externally exposed display device 1 such as the LED chip 20 and the electrode wiring 22 for electrical connection from the external environment, and is made of a transparent material for display characteristics. It is obvious that the protective layer 60 may be formed. The material of the protective layer 60 is that a flexible or high-strength material may be partially applied to match the characteristics of the protective layer 60 among the above-described materials of the base substrate 10 according to an embodiment of the present invention. Of course.

Although the present invention has been described in detail through specific examples, it is intended to describe the present invention in detail, and the present invention is not limited thereto. It will be clear that the transformation or improvement is possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

1: Transparent display device for vehicle 10: Base substrate
20: LED chip 21: contact electrode
22: electrode wiring 22a: first electrode wiring
22b: second electrode wiring 23: electrical short circuit
30: bezel part 40: external power
50: dummy pattern 60: protective layer

Claims (9)

base substrate;
a plurality of micro LED chips respectively arranged on the base substrate in a longitudinal direction and a transverse direction intersecting the longitudinal direction;
A first electrode wiring connecting the plurality of micro LED chips in the longitudinal direction and each of the plurality of micro LEDs connected to the first electrode wiring are individually connected to each other and extended on one side of the base substrate, the plurality of micro LEDs an electrode wiring comprising a second electrode wiring electrically connecting the chip to an external power source, formed of an electrically conductive metal and arranged in a mesh pattern shape on the base substrate; and
A dummy pattern formed to be electrically insulated from the electrode wiring and extending from the electrode wiring to correspond to the shape of the pattern of the electrode wiring in an entire area other than the area where the electrode wiring is formed on the base substrate; Including, a transparent display device for a vehicle. The method according to claim 1,
It further includes a; electrically conductive contact electrode formed on the base substrate and contact-coupled to a wider corresponding surface on the lower surface of the LED chip,
The first electrode wiring and the second electrode wiring are electrically connected to the contact electrode to be electrically connected to the micro LED chip. delete The method according to claim 1,
An area of each of the plurality of micro LED chips is formed in a range of 30x30 μm to 100x100 μm, and a mutual arrangement interval of the plurality of micro LED chips in a longitudinal or lateral direction is formed in a range of 150 μm to 500 μm, a transparent display device for a vehicle . delete The method according to claim 1,
The first electrode wiring and the second electrode wiring are made of a conductive metal, and a matte organic material is applied on an upper surface of the transparent display device for a vehicle. delete delete The method according to claim 1,
The first electrode wiring, the second electrode wiring, and the dummy pattern are formed of the same material, and the first electrode wiring, the second electrode wiring, and the dummy pattern are spaced apart by a predetermined distance to form an electrical short circuit. Device.

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