KR20160148739A - Floating image display device - Google Patents

Abstract

An embodiment of the present invention relates to a floating image display device, capable of displaying a floating image by using a transparent display device and a reflection mirror and changing the display position of the floating image by changing a curvature and/or position of the reflection mirror. The floating image display device according to an embodiment of the present invention includes the transparent display device and the reflection mirror. The transparent display device includes a transparent display panel on which pixels each including a transmitting unit to transmit light and a light emitting unit to emit the light through one side thereof are prepared. The reflection mirror is arranged on one side of the transparent display panel and reflects the image displayed on the transparent display panel to be displayed as the floating image on the outer side opposite to the one side of the transparent display panel through the transmitting units of the pixels.

Description

[0001] FLOATING IMAGE DISPLAY DEVICE [0002]

An embodiment of the present invention relates to a floating image display device.

Flat panel display devices, which have been developed with the development of LCDs (Liquid Crystal Displays), are expected to contribute to the development of smart phones and LCDs by the rapid technological development of TFT (Thin Film Transistor) LCD, PDP (Plasma Display Panel) and OLED (Organic Light Emitting Display) Is being applied not only to small mobile devices such as tablets, but also to notebooks, monitors and TVs. Recently, flat panel displays have been developed as flexible display devices that can be bent or folded, and as transparent display devices that can see the background.

In particular, recently, a transparent display device is manufactured to be transparently realized using an OLED. A transparent display device using an OLED is transparent when not displaying an image, and displays an image when displaying an image.

Meanwhile, in the conventional floating image display device, an image displayed by a display device of an integral image type is converted into a floating image by using a floating lens such as a convex lens or a fresnel lens. . In this case, since the floating image can not be realized at a position below the focal distance of the floating lens, there is a problem that viewing distance for watching the floating image is limited.

An embodiment of the present invention provides a floating image display device capable of displaying a floating image using a transparent display device and a reflective mirror.

Further, the embodiment of the present invention provides a floating image display device capable of varying the display position of the floating image by varying the curvature and / or position of the reflecting mirror.

A floating image display device according to an embodiment of the present invention includes a transparent display device and a reflection mirror. The transparent display device includes a transparent display panel having pixels each including a transmissive portion that transmits light and a light-emitting portion that emits light on one surface. The reflective mirror is disposed on the one surface of the transparent display panel and reflects the image displayed on the transparent display panel to be displayed as a floating image on the outside of the opposite surface of the transparent display panel through the transparent portions of the pixels.

A still image display apparatus according to another embodiment of the present invention includes a transparent display device and a reflection mirror. The transparent display device includes a transparent display panel having pixels each including a transmissive portion that transmits light and a light-emitting portion that emits light on one surface. The reflective mirror is disposed on the one side of the transparent display panel and reflects the image displayed on the transparent display panel to be displayed as a floating image of a virtual image on the rear side of the reflective mirror.

An embodiment of the present invention uses a transparent display device including pixels each including a transmissive portion that substantially passes light incident from the outside and a light emitting portion that emits light. As a result, the embodiment of the present invention can display the image reflected by the reflection mirror disposed on the front surface of the transparent display device as a floating image on the back surface of the transparent display device through the transparent portions of the transparent display device.

In addition, embodiments of the present invention can adjust the focal length of the reflective mirror by adjusting the curvature of the reflective mirror. As a result, the embodiment of the present invention can adjust the magnification of the floating image and the position at which the floating image is displayed. That is, the embodiment of the present invention can display the floating image at a desired position or by a viewer at a desired magnification by adjusting the curvature of the reflective mirror using the tension providing means.

In addition, embodiments of the present invention can adjust the focal length of the reflective mirror to the outside of the back of the transparent display panel by adjusting the curvature of the reflective mirror. As a result, the embodiment of the present invention can display the floating image as an image in the rear of the reflection mirror 200.

Further, the embodiment of the present invention can display a floating image of a virtual image on the rear side of the reflective mirror at a distance of two times or more the distance between the transparent display panel and the reflective mirror. Therefore, when the embodiment of the present invention is applied to a head-up display (HUD) applied to an automobile, a floating image is displayed in a virtual image behind the reflection mirror, thereby minimizing the driver's focal length change The head-up display information can be viewed.

Further, the embodiment of the present invention can adjust the magnification of the floating image and the position at which the floating image is displayed by adjusting the distance between the reflective mirror and the transparent display panel. That is, the embodiment of the present invention can adjust the distance between the reflective mirror and the transparent display panel by adjusting the positions of the first and second moving means by using the moving means adjustment unit, so that the viewer can adjust the distance between the reflective mirror and the transparent display panel, A floating image can be displayed at a desired magnification.

Further, in the embodiment of the present invention, the external light incident on the back surface of the transparent display panel is transmitted through the transmissive portions of the transparent display panel using the? / 4 plate and the polarizer, reflected by the reflective mirror, It is possible to prevent the viewer from being viewed.

1 is a perspective view schematically showing a floating image display apparatus according to an embodiment of the present invention;
2 is an exploded perspective view showing a floating image display apparatus according to an embodiment of the present invention;
FIG. 3 is an exemplary view showing the transparent display device of FIG. 2; FIG.
4 is an exemplary view showing pixels included in the display area of FIG. 3;
5 is a cross-sectional view taken along line I-I 'of FIG. 4;
Figures 6A-6C illustrate exemplary reflective mirrors.
7 is a side cross-sectional view showing an example of the floating image display device of FIG. 1 in detail;
8 is an exemplary view showing a floating image displayed by a transparent display panel and a reflection mirror of a first curvature.
9 is an exemplary view showing a floating image displayed by a transparent display panel and a reflective mirror of a second curvature;
10 is an exemplary view showing a floating image displayed by a transparent display panel and a reflection mirror of a third curvature;
11 is a side cross-sectional view showing another example of the floating image display device of FIG. 1 in detail;
12 is an exemplary view showing a floating image displayed when the distance between the transparent display panel and the reflective mirror is the first distance;
13 is an exemplary view showing a floating image displayed when a distance between a transparent display panel and a reflective mirror is a second distance;
FIG. 14 is a side cross-sectional view showing another example of the floating image display device of FIG. 1 in detail. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Where the terms "comprises," "having," "consisting of," and the like are used in this specification, other portions may be added as long as "only" is not used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

The terms "X-axis direction "," Y-axis direction ", and "Z-axis direction" should not be construed solely by the geometric relationship in which the relationship between them is vertical, It may mean having directionality.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, May refer to any combination of items that may be presented from more than one.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other, partially or wholly, technically various interlocking and driving, and that the embodiments may be practiced independently of each other, It is possible.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view schematically showing a floating image display apparatus according to an embodiment of the present invention. 2 is an exploded perspective view showing a floating image display apparatus according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, a floating image display apparatus according to an embodiment of the present invention includes a transparent display device 100, a reflective mirror 200, and a reflective mirror storage cover 300.

The transparent display device 100 is a display device which can be viewed transparently and thereby can display a background image. That is, the transparent display device 100 is capable of transmitting light, and can emit a predetermined light to display an image. A detailed description of the transparent display device 100 will be given later with reference to FIGS. 3 to 5. FIG.

The reflective mirror 200 is disposed on one side of the transparent display device 100. One side of the transparent display device 100 is defined as a front side of the transparent display device 100 and a side opposite to the side of the transparent display device 100 is defined as a front side of the transparent display device 100. [ It is defined as the back surface. The reflective mirror 200 is disposed in a direction in which the transparent display device 100 displays an image. The reflective mirror 200 may be a concave mirror having a concave surface facing the front surface of the transparent display device 100.

The reflective mirror 200 reflects the image of the transparent display device 100 so that the image reflected by the reflective mirror 200 passes through the transparent display device 100 to the back side of the transparent display device 100, (floating image). The floating image is an image displayed in a space a predetermined distance from the display surface of the transparent display device 100, and is an image displayed as floating at a predetermined distance from the transparent display device 100. A method of displaying a floating image using a transparent display device 100 and a reflective mirror 200 according to an embodiment of the present invention will be described with reference to FIGS. 8 to 10, 12, and 13, do.

The reflective mirror 200 may be formed as a spherical mirror curved inward as shown in FIG. 6A, but is not limited thereto. For example, the reflective mirror 200 has a curved shape inward like a spherical mirror, but may be formed to be larger or smaller than the curvature of the spherical mirror.

Also, the reflection mirror 200 may be formed as a mirror curved inward only in the longitudinal direction (x-axis direction) of the transparent display device as shown in FIG. 6B. However, in this case, the floating image is formed only in the longitudinal direction (x-axis direction) of the transparent display device, and it is difficult to form the floating image in the unidirectional direction (y-axis direction).

Also, the reflection mirror 200 may be formed as a mirror curved inward only in a unidirectional direction (y-axis direction) of the transparent display device as shown in FIG. 6C. However, in this case, a floating image is formed only in one direction (y-axis direction) of the transparent display device, and it is difficult to form a floating image in the longitudinal direction (x-axis direction).

The reflective mirror storage cover 300 is formed to have a larger size than the reflective mirror 200 so as to accommodate the reflective mirror 200 to protect the reflective mirror 200 from an external impact. Note that the reflective mirror storage cover 300 may be formed of plastic such as polycarbonate and polyethylene terephthalate, but is not limited thereto. The reflective mirror housing cover 300 can be fixed using a transparent member such as a transparent display device 100 and a fixing member such as a screw or an adhesive and an adhesive film. Alternatively, the reflection mirror storage cover 300 may be fixed to the support member supporting the reflection mirror 200 using a fixing member or an adhesive member. Alternatively, the reflection mirror housing cover 300 may be fixed to the guide rail for moving the reflection mirror 200 using a fixing member or an adhesive member.

3 is an exemplary view showing the transparent display device of FIG. 3, the transparent display device 100 according to the exemplary embodiment of the present invention has been described with reference to an organic light emitting display (OLED). However, the OLED display may be a liquid crystal display (LCD) And may also be implemented as an electrophoresis display.

3, the transparent display device 100 includes a transparent display panel 110, a gate driver 120, a source driver IC 130 A flexible film 140, a circuit board 150, and a timing control unit 160. [

The transparent display panel 110 includes a lower substrate 111, an upper substrate 112, and a liquid crystal layer interposed between the lower substrate 111 and the upper substrate 112. The lower substrate 111 may be provided with thin film transistors and organic light emitting layers. The upper substrate 112 may be an encapsulating substrate.

In the display area DA of the transparent display panel 110, the pixels arranged in the intersecting regions of the gate lines, the data lines, the gate lines and the data lines are formed. The pixels of the display area DA can display an image. A detailed description of each of the pixels in the display area DA will be described later with reference to FIGS. 4 and 5. FIG.

The gate driver 120 supplies the gate signals to the gate lines according to the gate control signal input from the timing controller 160. In FIG. 3, the gate driver 120 is formed on the outside of one side of the display area DA of the transparent display panel 110 in a gate driver in panel (GIP) manner, but the present invention is not limited thereto. That is, the gate driver 120 may be formed on the outside of both sides of the display area DA of the transparent display panel 110 by a GIP method, or may be formed of a driving chip, mounted on a flexible film, Or may be attached to the transparent display panel 110 in a similar manner.

The source driver IC 130 receives the digital video data and the source control signal from the timing controller 160. The source driver IC 130 converts the digital video data into analog data voltages according to the source control signal and supplies the analog data voltages to the data lines. When the source drive IC 130 is fabricated from a driving chip, the source drive IC 130 may be mounted on the flexible film 140 using a chip on film (COF) method or a chip on plastic (COP) method.

The size of the lower substrate 111 is larger than that of the upper substrate 112, thereby exposing a part of the upper surface of the lower substrate 111. Pads, such as data pads, are provided on a portion of the exposed upper surface of the lower substrate 111. Wires connecting the pads and the source drive IC 130 and wirings connecting the pads and the wirings of the circuit board 150 may be formed in the flexible film 140. The flexible film 140 is adhered to the pads using an anisotropic conducting film, whereby the pads and the wirings of the flexible film 140 can be connected.

The circuit board 150 may be attached to the flexible films 140. The circuit board 150 may be implemented with a plurality of circuits implemented with driving chips. For example, the timing control unit 160 may be mounted on the circuit board 150. [ The circuit board 150 may be a printed circuit board or a flexible printed circuit board.

The timing controller 160 receives digital video data and a timing signal from an external system board (not shown). The timing control unit 60 generates a gate control signal for controlling the operation timing of the gate driving unit 20 and a source control signal for controlling the source drive ICs 30 based on the timing signal. The timing controller 60 supplies a gate control signal to the gate driver and a source control signal to the source driver ICs 30.

FIG. 4 is an exemplary view showing pixels included in the display area of FIG. 3. FIG. 5 is a cross-sectional view taken along line I-I 'of FIG.

4 and 5, the pixel P includes a transmissive portion TA and a light emitting portion EA. The light emitting portion EA may include a plurality of light emitting portions. In FIGS. 4 and 5, the light emitting unit EA includes the red light emitting unit RE, the green light emitting unit GE, and the blue light emitting unit BE. However, the present invention is not limited thereto.

The transmissive portion TA is an area through which light incident from the outside passes almost as it is. The green light emitting portion GE is a region for emitting green light and the blue light emitting portion BE is a region for emitting blue light. The blue light emitting portion EA is a region for emitting light, the red light emitting portion RE is a region for emitting red light, It is a light emitting region.

5, a transistor element T, an anode electrode AND, an organic layer EL, and a cathode electrode CAT are formed on the red light emitting portion RE, the green light emitting portion GE, and the blue light emitting portion BE, .

The transistor element T includes an active layer ACT provided on the lower substrate 111, a first insulating film I1 provided on the active layer ACT, a gate electrode GE provided on the first insulating film I1 A second insulating film I2 provided on the gate electrode GE and a second insulating film I2 provided on the second insulating film I2 and connected to the active layer ACT through the first and second contact holes CNT1 and CNT2 And includes a source electrode SE and a drain electrode DE. In FIG. 5, the transistor element T is formed by a top gate method, but the present invention is not limited thereto, and the transistor element T may be formed by a bottom gate method.

The anode electrode AND is connected to the drain electrode DE of the transistor element T through the third contact hole CNT3 passing through the interlayer insulating film ILD provided on the source electrode SE and the drain electrode DE do. Between the adjacent anode electrodes (AND), barrier ribs are provided, so that the adjacent anode electrodes (AND) can be electrically isolated.

An organic layer EL is provided on the anode electrode AND. The organic layer EL may include a hole transporting layer, an organic light emitting layer, and an electron transporting layer. A cathode electrode (CAT) is provided on the organic layer (EL) and the barrier rib (W). When a voltage is applied to the anode electrode (AND) and the cathode electrode (CAT), holes and electrons move to the organic light emitting layer through the hole transporting layer and the electron transporting layer, respectively.

Although FIG. 5 illustrates that the transparent display panel 110 is implemented by a top emission method, the present invention is not limited thereto, and may be implemented by a bottom emission method. The reflective mirror 200 is disposed on the upper substrate 112 of the transparent display panel 110 in the case of the front emission type because the reflective mirror 200 is disposed in the light emission direction of the transparent display panel 110, (111) of the lower substrate (110).

In the top emission type, since the light of the organic layer EL emits in the direction of the upper substrate, the transistor T may be provided broadly below the barrier rib W and the anode electrode AND. Accordingly, the front emission type has an advantage that the design area of the transistor T is wider than that of the back emission type. In the front emission type, it is preferable that the anode electrode (AND) is formed of a metal material having a high reflectivity such as aluminum, a laminate structure of aluminum and ITO, and the cathode electrode (CAT) is formed of a transparent metal material such as ITO or IZO.

As described above, each of the pixels P of the transparent display device 100 according to the embodiment of the present invention includes a transmissive portion TA that substantially passes light incident from the outside and a light emitting portion EA ). As a result, in the embodiment of the present invention, the image reflected by the reflection mirror 200 is displayed as a floating image on the back surface of the transparent display device 100 in which an image is displayed through the transmissive portions TA of the transparent display device 100 . On the other hand, when the displayed image of the transparent display device 100 is a two-dimensional image, the floating image is displayed to the viewer in two dimensions.

FIG. 7 is a side cross-sectional view showing an example of the floating image display apparatus of FIG. 1 in detail. 7, in addition to the transparent display device 100, the reflective mirror 200, and the reflective mirror storage cover 300, a floating image display device according to an embodiment of the present invention includes a reflective mirror 200, And a curvature varying unit 400 for adjusting the curvature.

The transparent display panel 110, the reflective mirror 200, and the reflective mirror storage cover 300 of FIG. 7 have already been described in detail with reference to FIGS.

The reflection mirror 200 may include a base plate 210 and a mirror reflection layer 220 provided on the base plate 210, as shown in FIG.

The base plate 210 may be formed to have a predetermined curvature. 8 to 10, the base plate 210 has a material capable of changing its curvature when a predetermined force is applied by the curvature-variable portion to adjust the curvature of the reflective mirror 200. [ For example, the base plate 210 may be a plastic such as polycarbonate and polyethylene terephthalate.

The mirror reflection layer 220 can be formed of any material that can mirror-reflect. In addition, the mirror reflection layer 220 may be formed in a sheet form and then attached to the base plate 210, but is not limited thereto.

The curvature variable portion 400 includes a support 410, a fixing member 420, a tension providing means 430, and a tension adjusting portion 440.

The support 410 is located on the backside of the reflective mirror 200 and is for supporting the reflective mirror 200. The support 410 may be fixed to the reflective mirror housing cover 300.

The fixing member 420 fixes the support base 410 and the base plate 210 of the reflection mirror 200. The fixing member 420 can fix the center of the support 410 and the center of the base plate 210 of the reflective mirror 200.

The tension providing means 430 connects both ends of the tension adjusting unit 440 disposed at both ends of the support table 410 and the base plate 210 of the reflection mirror 200 with a predetermined tension. That is, the center of the reflection mirror 200 is fixed to the support 410, a predetermined tension is applied to both ends, and the base plate 210 of the reflection mirror 200 has a curvature The curvature of the reflective mirror 200 can be changed according to the tension of the tension providing means 430. [

The tension adjusting unit 440 may be disposed at each of both ends of the support table 410. The tension adjusting unit 440 can adjust the tension of the tension providing means 430. [ For example, the tension adjusting unit 440 can adjust the tension providing unit 430 to connect the supporting table 410 and the reflecting mirror 200 with a first tension. In this case, And may have a first curvature r1. The tension adjusting unit 400 may adjust the tension providing unit 430 to connect the supporting table 410 and the reflecting mirror 200 with the second tension. In this case, And may have a curvature r2. Further, the tension adjusting unit 400 may adjust the tension providing unit 430 to connect the supporting bar 410 and the reflecting mirror 200 with a third tensile force. In this case, And may have a curvature r3. It should be noted that the tension providing means 430 may be a string and the tension adjusting unit 440 may be an electric reel for winding and unwinding a string.

As described above, the embodiment of the present invention can vary the curvature of the reflective mirror 200 using the curvature variable portion 400. Since the focal length of the reflective mirror 200 is changed when the curvature of the reflective mirror 200 is changed, the position at which the floating image is displayed can be changed. Hereinafter, the display position of the floating image according to the curvature variable of the reflection mirror 200 will be described in detail with reference to FIGS. 8 to 10. FIG.

8 is an exemplary view showing a floating image displayed by a transparent display panel and a reflection mirror of a first curvature. 8 shows a floating image displayed when the reflective mirror 200 is adjusted to have the first curvature r1 by the curvature varying unit 400. [

The floating image fim is an image displayed in a space a predetermined distance from the display surface of the transparent display device 100 and means an image displayed as floating at a predetermined distance from the transparent display device 100. [ The floating image fim can be displayed by reflecting the image im displayed on the transparent display panel 110 as shown in Fig. Therefore, when the reflective mirror 200 is a spherical mirror as shown in FIG. 6A, the image im displayed on the transparent display panel 110 can be displayed upside down, right and left reversely. Alternatively, when the reflective mirror 200 is a mirror curved in the longitudinal direction (x-axis direction) as shown in FIG. 6B, the left and right images im displayed on the transparent display panel 110 can be reversed. Alternatively, when the reflective mirror 200 is curved only in a unidirectional direction (y-axis direction) as shown in FIG. 6C, the upper and lower portions of the image im displayed on the transparent display panel 110 may be reversed.

8, a plane in which the image im is displayed on the transparent display panel 110 is referred to as a first plane P1 and a plane in the center of the reflection mirror 200 in which the image displayed on the transparent display panel 110 is reflected The plane in which the image reflected by the reflective mirror 200 is represented by the floating image fim is defined as a third plane P3. The distance i between the second plane P2 and the third plane P3 can be calculated from the distance o between the first plane P1 and the second plane P2 and the focal distance f. < / RTI >

"O" is the distance between the first plane P1 and the second plane P2, "f" is the distance between the first plane P1 and the second plane P2, "i" is the distance between the second plane P2 and the third plane P3, Represents a focal distance.

On the other hand, the distance d between the first plane P1 and the third plane P3 is a distance from the transparent display panel 110 to the floating image fim. The distance d between the second plane P2 and the third plane P3 (O) between the first plane (P1) and the second plane (P2) at a distance (i) between the first plane (P1) and the second plane (P3). Therefore, the distance d between the first plane P1 and the third plane P3 can be defined as shown in Equation (2).

The magnification m indicating the size of the floating image fim with respect to the size of the image im of the transparent display panel can be defined as shown in Equation (3).

8 illustrates that the distance o between the first plane P1 and the second plane P2: focal length f is 5: 3. In this case, the first plane P1 and the third plane P2 P3 is "5f / 6 ", and the magnification m is 1.5 times.

9 is an exemplary view showing a floating image displayed by a transparent display panel and a reflection mirror of a second curvature. 9 shows a floating image displayed when the curvature changing unit 400 adjusts the reflecting mirror 200 to have a second curvature r2 larger than the first curvature r1.

The floating image fim is an image displayed in a space a predetermined distance from the display surface of the transparent display device 100 and means an image displayed as floating at a predetermined distance from the transparent display device 100. [ The floating image fim can be displayed by reflecting the image im displayed on the transparent display panel 110 as shown in Fig. Therefore, when the reflective mirror 200 is a spherical mirror as shown in FIG. 6A, the image im displayed on the transparent display panel 110 can be displayed upside down, right and left reversely. Alternatively, when the reflective mirror 200 is a mirror curved in the longitudinal direction (x-axis direction) as shown in FIG. 6B, the left and right images im displayed on the transparent display panel 110 can be reversed. Alternatively, when the reflective mirror 200 is a mirror curved in only one direction (y-axis direction) as shown in FIG. 6C, the upper and lower images im displayed on the transparent display panel 110 can be reversed.

9, a plane on which the image im is displayed on the transparent display panel 110 is referred to as a first plane P1, and a plane on which the image displayed on the transparent display panel 110 is reflected, The center plane is referred to as a second plane P2 and the plane in which an image reflected by the reflection mirror 200 is represented by the floating image fim is defined as a third plane P3. The distance i between the second plane P2 and the third plane P3 can be defined as in Equation 1 and the distance d between the first plane P1 and the third plane P3 ) Can be defined as shown in Equation (2). The magnification m indicating the size of the floating image fim with respect to the size of the image im of the transparent display panel can be defined as shown in Equation (3).

When the curvature of the reflective mirror 200 is changed, the focal length f is changed. As the curvature of the reflective mirror 200 increases, the focal length f becomes longer. For example, when the reflective mirror 200 has the first curvature r1, the distance o between the first plane P1 and the second plane P2 as shown in FIG. 8: the focal length f is 5 The distance (o) between the first plane P1 and the second plane P2: the focal length f, as shown in FIG. 9, when the reflective mirror 200 has the second curvature r2, May be 10: 7. When the reflecting mirror 200 has the second curvature r2, the distance d between the first plane P1 and the third plane P3 is "40f / 21? 2f ", and the magnification m 2.33 times.

8 and 9, the embodiment of the present invention can adjust the focal length of the reflective mirror 200 by adjusting the curvature of the reflective mirror 200. As shown in FIG. As a result, the embodiment of the present invention can adjust the position where the floating image fim is displayed and the magnification m of the floating image fim. That is, the embodiment of the present invention can display the floating image fim at a position desired by the viewer or at a desired magnification by adjusting the curvature of the reflective mirror 200 using the tension providing means 430. [

10 is an exemplary view showing a floating image displayed by a transparent display panel and a reflection mirror of a third curvature. 10 shows a floating image displayed when the reflective mirror 200 is adjusted by the curvature varying unit 400 to have a third curvature r3 larger than the second curvature r2.

10, a plane on which the image im is displayed on the transparent display panel 110 is referred to as a first plane P1, and a plane on which the image displayed on the transparent display panel 110 is reflected, The center plane is referred to as a second plane P2 and the plane in which an image reflected by the reflection mirror 200 is represented by the floating image fim is defined as a third plane P3.

Referring to FIG. 10, the focal length f is changed when the curvature of the reflective mirror 200 is changed. As the curvature of the reflective mirror 200 increases, the focal length f becomes longer. 10, the focal distance f is located outside the back surface of the transparent display panel 110. In this case, the viewer can see that the reflection mirror 200 has the third curvature r3, A floating image (fim) of the virtual image located on the back side is viewed.

The distance i between the second plane P2 and the third plane P3 on which the floating image fim of the virtual image is displayed can be defined as shown in Equation 1. [

The distance d between the first plane P1 and the third plane P3 on which the floating image fim of the virtual image is displayed can be defined as shown in Equation 5. [

The magnification m indicating the magnitude of the floating image fim of the virtual image with respect to the size of the image im of the transparent display panel can be defined as shown in Equation (6).

When the reflective mirror 200 has the third curvature r3, the distance o between the first plane P1 and the second plane P2: the focal distance f is 5: 6 have. In this case, the distance d between the first plane P1 and the third plane P3 is "35f / 6? 6f ", and the magnification is doubled.

10, the embodiment of the present invention can adjust the focal length of the reflective mirror 200 to the outside of the back surface of the transparent display panel 110 by adjusting the curvature of the reflective mirror 200. As a result, the embodiment of the present invention can display the floating image fim as an image in the rear of the reflective mirror 200.

On the other hand, when the reflective mirror 200 is a planar mirror having an infinite focal length f, the distance i between the second plane P2 and the third plane P3 is equal to the distance between the first plane P1 and the second plane The distance d between the first plane P1 and the third plane P3 is equal to the distance between the first plane P1 and the second plane P2, Of the distance (o) between them. That is, in the embodiment of the present invention, a floating image fim of a virtual image is displayed on the rear side of the reflective mirror 200 at a distance of two times or more the distance o between the transparent display panel 110 and the reflective mirror 200 . Therefore, when the embodiment of the present invention is applied to a head-up display (HUD) applied to an automobile, a floating image fim is displayed in an imaginary image behind the reflection mirror 200, Up display information can be viewed while minimizing the focal distance change of the head-up display.

11 is a side cross-sectional view showing still another example of the floating image display device of FIG. 11, in addition to the transparent display device 100, the reflective mirror 200, and the reflective mirror storage cover 300, the floating image display device according to the embodiment of the present invention may be configured to adjust the position of the reflective mirror 200 And a position changing unit 500 for detecting the position.

The transparent display panel 110, the reflective mirror 200, and the reflective mirror storage cover 300 of FIG. 11 have already been described in detail with reference to FIGS.

The position variable portion 500 includes a support 510, a fixing member 520, a guide rail 530, a first moving means 540, a second moving means 550, and a moving means adjusting portion 560 .

The support 510 is located on the backside of the reflective mirror 200 and is for supporting the reflective mirror 200.

The fixing member 520 fixes the support plate 510 and the base plate 210 of the reflective mirror 200. The fixing member 520 can fix the center of the support 510 and the center of the base plate 210 of the reflection mirror 200.

The guide rail 530 is located on the side surface of the reflection mirror 200 and can be fixed to the reflection mirror storage cover 300. The first and second moving means 540 and 550 are inserted into the guide rail 530 and the first and second moving means 540 and 550 are electrically driven under the control of the moving means adjusting unit 560, Lt; RTI ID = 0.0 > 530 < / RTI > The first and second moving means 540 and 550 may be implemented as rollers.

The first moving means 540 may be connected to the rear surface of one end of the base plate 210 of the reflective mirror 200. The second moving means 550 may be connected to one end of the support 510. Accordingly, when the first and second moving means 540 and 550 move along the guide rail 530, the reflecting mirror 200 also moves. Particularly, since the guide rails 530 are arranged in the thickness direction (z-axis direction) of the transparent display panel 110, the reflection mirrors 200 move along the thickness direction (z-axis direction) of the transparent display panel 110 do. Either one of the first and second moving means 540 and 550 may be omitted.

The moving means adjustment unit 560 may be disposed at one end of the guide rail 530. The shifting means adjustment unit 560 can adjust the positions of the first and second shifting means 540 and 550. For example, the moving means adjustment unit 560 may move the first and second means 540 and 550 to the first position to maintain the distance between the reflective mirror 200 and the transparent display panel 110 at a first distance . The moving means adjusting unit 560 can move the first and second moving means 540 and 550 to the second position so that the distance between the reflecting mirror 200 and the transparent display panel 110 can be maintained at the second distance have.

In FIG. 11, for convenience of explanation, it is exemplified that the floating image display apparatus according to the embodiment of the present invention includes only the position variable portion 500 except for the curvature variable portion 400 of FIG. However, the floating image display apparatus according to the embodiment of the present invention may include both the curvature-changing unit 400 and the position-changing unit 500 of FIG.

As described above, the embodiment of the present invention can adjust the distance between the reflective mirror 200 and the transparent display panel 110 using the position variable unit 500. When the distance between the reflective mirror 200 and the transparent display panel 110 is adjusted, the position at which the floating image is displayed can be changed. Hereinafter, the display position of the floating image according to the positional change of the reflective mirror 200 will be described in detail with reference to FIGS. 12 and 13. FIG.

12 is an exemplary view showing a floating image displayed when the distance between the transparent display panel and the reflective mirror is the first distance. 12 shows a floating image displayed when the reflective mirror 200 and the transparent display panel 110 are adjusted by the position changing unit 500 so as to be separated by the first distance s1.

The floating image fim is an image displayed in a space a predetermined distance from the display surface of the transparent display device 100 and means an image displayed as floating at a predetermined distance from the transparent display device 100. [ The floating image fim can be displayed by reflecting the image im displayed on the transparent display panel 110 as shown in Fig. Therefore, when the reflective mirror 200 is a spherical mirror as shown in FIG. 6A, the image im displayed on the transparent display panel 110 can be displayed upside down, right and left reversely. Alternatively, when the reflective mirror 200 is a mirror curved in the longitudinal direction (x-axis direction) as shown in FIG. 6B, the left and right images im displayed on the transparent display panel 110 can be reversed. Alternatively, when the reflective mirror 200 is a mirror curved in only one direction (y-axis direction) as shown in FIG. 6C, the upper and lower images im displayed on the transparent display panel 110 can be reversed.

12, the plane on which the image im is displayed on the transparent display panel 110 is referred to as a first plane P1 and the plane on the center of the reflection mirror 200 on which the image displayed on the transparent display panel 110 is reflected The plane in which the image reflected by the reflective mirror 200 is represented by the floating image fim is defined as a third plane P3. The embodiment of the present invention adjusts the distance o between the first plane P1 and the second plane P2 to the first distance s1.

The distance i between the second plane P2 and the third plane P3 can be calculated from the distance o between the first plane P1 and the second plane P2 and the focal distance f. < / RTI > Further, the distance d between the first plane P1 and the third plane P3 can be defined as shown in Equation (2). The magnification m indicating the size of the floating image fim with respect to the size of the image im of the transparent display panel can be defined as shown in Equation (3).

12 illustrates that the distance o between the first plane P1 and the second plane P2: focal length f is 5: 3. In this case, the first plane P1 and the third plane P2 P3 is "5f / 6 ", and the magnification m is 1.5 times.

13 is an exemplary view showing a floating image displayed when the distance between the transparent display panel and the reflective mirror is a second distance. 13 shows a floating image displayed when the reflective mirror 200 and the transparent display panel 110 are adjusted by the position changing unit 500 to be separated by the second distance s2.

The floating image fim is an image displayed in a space a predetermined distance from the display surface of the transparent display device 100 and means an image displayed as floating at a predetermined distance from the transparent display device 100. [ The floating image fim can be displayed by reflecting the image im displayed on the transparent display panel 110 as shown in Fig. Therefore, when the reflective mirror 200 is a spherical mirror as shown in FIG. 6A, the image im displayed on the transparent display panel 110 can be displayed upside down, right and left reversely. Alternatively, when the reflective mirror 200 is a mirror curved in the longitudinal direction (x-axis direction) as shown in FIG. 6B, the left and right images im displayed on the transparent display panel 110 may be reversed. Alternatively, when the reflective mirror 200 is a mirror curved in only one direction (y-axis direction) as shown in FIG. 6C, the upper and lower images im displayed on the transparent display panel 110 can be reversed.

13, a plane in which the image im is displayed on the transparent display panel 110 is referred to as a first plane P1 and a plane in the center of the reflection mirror 200 in which the image displayed on the transparent display panel 110 is reflected The plane in which the image reflected by the reflective mirror 200 is represented by the floating image fim is defined as a third plane P3. The embodiment of the present invention adjusts the distance o between the first plane P1 and the second plane P2 to the second distance s2.

The distance i between the second plane P2 and the third plane P3 can be calculated from the distance o between the first plane P1 and the second plane P2 and the focal distance f. < / RTI > Further, the distance d between the first plane P1 and the third plane P3 can be defined as shown in Equation (2). The magnification m indicating the size of the floating image fim with respect to the size of the image im of the transparent display panel can be defined as shown in Equation (3).

The distance d between the first plane P1 and the third plane P3 is changed when the distance o between the reflective mirror 200 and the transparent display panel 110 is changed. The distance d between the first plane P1 and the third plane P3 becomes closer as the distance o between the reflective mirror 200 and the transparent display panel 110 increases. For example, when the distance o between the reflective mirror 200 and the transparent display panel 110 is the first distance s1, the distance between the first plane P1 and the second plane P2 when the distance o between the reflective mirror 200 and the transparent display panel 110 is the second distance s2 as compared with the case where the focal length f is 5: (O) between the first plane P1 and the second plane P2: the focal length f may be 11: 6. When the distance o between the reflective mirror 200 and the transparent display panel 110 is the second distance s2, the distance d between the first plane P1 and the third plane P3 is 11f / 30 1 / 3f ", and the magnification m is 1.2 times.

12 and 13, the embodiment of the present invention adjusts the distance between the reflective mirror 200 and the transparent display panel 110 so that the position where the floating image fim is displayed and the position of the floating image fim, It is possible to adjust the magnification m. That is, in the embodiment of the present invention, the distance between the reflection mirror 200 and the transparent display panel 110 is adjusted by adjusting the position of the first and second moving means 540 and 550 using the moving means adjustment unit 560 So that the viewer can display the floating image fim at a desired position or at a desired magnification of the viewer.

FIG. 14 is a side cross-sectional view showing another example of the floating image display device of FIG. 1 in detail. 14, a floating image display apparatus according to an embodiment of the present invention includes a transparent display device 100, a reflective mirror 200, a reflective mirror storage cover 300, and a curvature variable portion 400, A quarter wave plate 610 and a polarizer 620 attached to the back surface of the polarizer plate 110.

The transparent display panel 110, the reflective mirror 200, and the reflective mirror storage cover 300 of FIG. 14 have already been described in detail with reference to FIGS. The curvature variable portion 400 of Fig. 14 has already been described in detail with reference to Fig.

The polarizing plate 620 can pass only the horizontal or vertical polarized light, and the? / 4 plate 610 phase-delays the incident light by? / 4. the external light incident on the back surface of the transparent display panel 110 is transmitted through the transmissive portions of the transparent display panel 110 and reflected by the reflective mirror 200 after being transmitted through the? / 4 plate 610 and the polarizer 620 It is possible to prevent the viewer from being viewed by being transmitted through the transparent portions of the transparent display panel 110.

For example, when the polarizing plate 620 passes only the horizontal polarized light (⊙), the horizontal polarized light (⊙) passing through the polarizing plate 620 is phase delayed by λ / 4 by the λ / 4 plate 610, And is reflected by the mirror 200 with the phase delayed by 3? / 4. The light retarded by 3? / 4 by the reflection mirror 200 is retarded by? / 4 again by the? / 4 plate 610 to be converted into vertical polarized light, so that the polarizer 620, which passes only the horizontal polarization? Can not pass through.

11 illustrates that the floating image display apparatus according to the embodiment of the present invention includes only the curvature changing unit 400 of FIG. 7 except for the position changing unit 500 of FIG. 11 for convenience of explanation. However, the floating image display apparatus according to the embodiment of the present invention may include both the curvature varying unit 400 of FIG. 7 and the position changing unit 500 of FIG. Alternatively, the floating image display apparatus according to the embodiment of the present invention may include only the position variable portion 500 of FIG. 11 except for the curvature varying portion 400 of FIG. 7 as shown in FIG.

As described above, in the embodiment of the present invention, external light incident on the back surface of the transparent display panel 110 using the? / 4 plate 610 and the polarizer 620 is transmitted through the transparent portions of the transparent display panel 110 It is reflected by the reflective mirror 200 and then transmitted through the transmissive portions of the transparent display panel 110 to prevent the viewer from being viewed.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those embodiments and various changes and modifications may be made without departing from the scope of the present invention. . Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

100: transparent display device 110: transparent display panel
111: lower substrate 112: upper substrate
120: Gate driver 130: Source drive IC
140: flexible film 150: circuit board
160: timing control section 200: reflection mirror
210: base plate 220: mirror reflection layer
300: reflection mirror storage cover 400: curvature variable portion
410, 510: Supports 420, 520: Fixing member
430: tension providing means 440: tension adjusting portion
500: position variable portion 530: guide rail
540: first moving means 550: second moving means
560: moving means adjustment unit 610:? / 4 plate
620: polarizer

Claims (12)

A transparent display device including a transparent display panel having pixels each including a transmissive portion for transmitting light and a light-emitting portion for emitting light on one surface; And
And a reflection mirror disposed on the one surface of the transparent display panel and reflecting the image displayed on the transparent display panel to be displayed as a floating image on the outside of the opposite surface of the transparent display panel through the transparent portions of the pixels A floating image display device. A transparent display device including a transparent display panel having pixels each including a transmissive portion for transmitting light and a light-emitting portion for emitting light on one surface; And
And a reflective mirror disposed on the one surface of the transparent display panel,
Wherein the reflective mirror reflects an image displayed on the transparent display panel to be displayed as a floating image of a virtual image on the rear side of the reflective mirror. 3. The method according to claim 1 or 2,
Wherein the reflection mirror is any one of a spherical mirror, a mirror curved along the longitudinal direction of the transparent display panel, and a mirror curved along one direction of the transparent display panel. 3. The method according to claim 1 or 2,
Wherein the reflecting mirror comprises:
A base plate having a predetermined curvature and having a material capable of changing a curvature when a predetermined force is applied; And
And a mirror reflection layer formed on the base plate. The method according to claim 1,
Further comprising a curvature-varying section for varying a curvature of the reflection mirror. 6. The method of claim 5,
Wherein the floating image is located farther away from the transparent display panel than when the reflective mirror has a first curvature by the curvature-varying portion and has a second curvature larger than the first curvature. 6. The method of claim 5,
Wherein the curvature-
A support positioned on the backside of the reflective mirror for supporting the reflective mirror;
A fixing member for fixing the back surface of the reflective mirror to the support;
A tension adjusting unit disposed at both ends of the support; And
And a tension providing unit that connects the tension adjusting unit and the reflective mirror at both ends with a predetermined tension, and the tension is varied by the tension adjusting unit. The method according to claim 1,
Further comprising a position varying unit for varying a distance between the reflective mirror and the transparent display panel. 9. The method of claim 8,
Wherein the floating image is farther away from the transparent display panel than when the distance between the reflective mirror and the transparent display panel is a first distance and the second distance is farther than the first distance. 9. The method of claim 8,
The position-
A guide rail disposed on a side surface of the reflective mirror in a thickness direction of the transparent display panel;
A first moving means connected to a rear surface of the reflecting mirror and inserted in the guide rail and moving along the guide rail; And
And a movement allowance adjustment unit that adjusts the position of the first movement unit. 3. The method according to claim 1 or 2,
Wherein the transparent display device further comprises a? / 4 plate and a polarizer disposed on the opposite surface of one side of the transparent display panel. 3. The method of claim 2,
Wherein the reflective mirror has a third curvature by the curvature varying unit, and the focal length of the reflective mirror is located outside the opposite side of the one surface of the transparent display panel The floating image display apparatus comprising:

Images