KR102401918B1 - Mirror type Display Device - Google Patents

Abstract

The present invention relates to a mirror-type display device capable of minimizing the occurrence of a diffraction pattern due to a diffraction phenomenon, comprising: a display panel including a plurality of light emitting units; and a reflective plate disposed on the display panel and having a plurality of openings for transmitting light emitted from the plurality of light emitting units, wherein the openings of the reflective plate are circular.

Description

Mirror type Display Device

The present invention relates to a mirror-type display device, and more particularly, to a mirror-type display device capable of minimizing diffractive reflection.

As the information society develops, the demand for a display device for displaying an image is increasing in various forms. For example, it has rapidly developed into a thin, light, and large-area Flat Panel Display Device (FPD) that replaces a bulky cathode ray tube (CRT). As such a flat panel display, Liquid Crystal Display (LCD), Plasma Display Panel (PDP), Electroluminescent Display (EL), Field Emission Display (FED) , and various flat panel display devices such as an electrophoretic display (ED) have been developed and utilized.

In these display devices, recently, a mirror type display that displays an image when the display panel is operating but has a mirror function when not in use so that it can display an image and reflect an image at the same time has been developed. have

The mirror-type display device may include a film structure or patterns (eg, a mirror pattern) having a reflective function to implement a mirror function (mirror function). A plurality of openings corresponding to regions for transmitting light are formed between adjacent mirror patterns. These openings are usually formed to correspond to the light emitting area of the display device. Since the light emitting area of the display device is usually defined by the intersection of gate lines and data lines, the openings between the mirror patterns have a rectangular shape formed according to the arrangement of gate lines and data lines to secure the light emitting area. will have However, since the distance from the center of the opening to each side is not constant, the portion having a relatively small side of the rectangular opening acts like a slit. When light passes through the openings between these mirror patterns, diffraction patterns are generated due to the diffraction of light, so there is a problem that prevents viewing of the displayed image.

An object of the present invention is to solve the above problems, and to provide a mirror-type display device capable of minimizing the occurrence of diffraction patterns due to diffraction when viewing an image.

According to a first aspect of the present invention, there is provided a mirror type display device comprising: a display panel including a plurality of light emitting units; and a reflective plate disposed on the display panel and having a plurality of openings for transmitting light emitted from the plurality of light emitting units, wherein the openings of the reflective plate are circular.

Areas of the plurality of openings of the reflector may be set in proportion to an area of the light emitting unit.

The plurality of openings may include a first color opening that transmits light of a first color, second color openings that transmit light of a second color, and a third color opening that transmits light of a third color having an opening; A portion of the second color openings is arranged to form a first rectangle enclosing the first color opening, and other portions of the second color openings are arranged to form a second rectangle enclosing the third color opening, wherein the first The quadrangle and the second quadrangle may share one side.

The plurality of openings may include a first color opening for transmitting light of a first color, a second color opening spaced apart from the first color opening and transmitting light of a second color, and the first and second color openings a first opening spaced apart from and having a third color opening through which light of a third color is transmitted; A line connecting the center of the first color opening, the center of the second color opening, and the center of the third color opening forms a triangle.

The first color opening and the second color opening may be alternately disposed in a first direction, and a line connecting the center of the first color opening and the center of the second color opening may form a vertical line.

The first color opening and the second color opening are alternately arranged in a first direction, and a line connecting the center of the first color opening and the center of the second color opening forms a predetermined angle with respect to a vertical line. can

The plurality of openings may include a fourth color opening spaced apart from the third color opening of the first opening and transmitting light of the first color, the third color opening spaced apart from the third color opening and the fourth color opening of the second color. a second opening having a fifth color opening for transmitting light, a sixth color opening spaced apart from the fourth and fifth color openings for transmitting light of the third color; A line connecting the center of the third color opening and the center of the third color opening and the line connecting the center of the first color opening and the center of the fifth color opening may have a predetermined angle.

The plurality of openings may include a seventh color opening spaced apart from the second color opening of the first opening to transmit the light of the first color, and a first opening spaced apart from the seventh color opening to transmit the light of the second color. a third opening having an eight color opening and a ninth color opening spaced apart from the seventh and eighth color openings to transmit light of the third color; and a tenth color opening spaced apart from the ninth color opening of the third opening and the fifth color opening of the second opening to transmit the light of the first color, and the second color opening spaced apart from the tenth color opening and a fourth opening spaced apart from the tenth and eleventh openings and having a twelfth color opening through which the light of the third color is transmitted, A first triangle is formed by a line connecting the center of the first color opening, the center of the second color opening, and the center of the third color opening, the center of the fourth color opening of the second opening, the A second triangle is formed by a line connecting the center of the fifth color opening and the center of the sixth color opening, the center of the seventh color opening of the third opening, the center of the eighth color opening, and A third triangle is formed by a line connecting the centers of the ninth color openings, the center of the tenth color opening of the fourth opening, the center of the eleventh color opening, and the center of the twelfth color opening A fourth triangle is formed by the connecting line, and a quadrangle is formed by the line connecting the center of the first triangle, the center of the second triangle, the center of the third triangle, and the center of the fourth triangle. have.

According to the mirror-type display device of the present invention, since the openings of the reflecting plate are configured in a circular shape so that the openings have slits of the same size, the effect of maximally suppressing the diffraction phenomenon that occurs when light emitted from the light emitting area passes through the openings can get

1 is a cross-sectional view schematically showing a mirror type display device according to an embodiment of the present invention;
2 is a plan view illustrating a reflector of a mirror type display device according to a first embodiment of the present invention;
3 is a plan view showing a reflector of a mirror type display device according to a second embodiment of the present invention;
4 is a plan view showing the area A shown in FIG. 3 in more detail;
5 is a simulation diagram of the diffraction phenomenon of light appearing according to the opening of the reflector shown in FIG. 3;
6 is a plan view showing a reflector of a mirror type display device according to a second embodiment of the present invention;
7 is a plan view showing the area B shown in FIG. 6 in more detail;
8 is a simulation view of the diffraction phenomenon of light appearing according to the opening of the reflector shown in FIG. 6;
9 is a view showing a reflection image of a display panel and a simulation diagram obtained by diffraction of a reflector structure according to the prior art (Comparative Examples 1 to 3) and a reflector according to the first embodiment of the present invention;

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be embodied in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative and not limited to the matters shown in the present invention. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. When 'including', 'having', 'consisting', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, cases including the plural are included unless otherwise explicitly stated.

In interpreting the components, it is construed as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'next to', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

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

Each feature of the various embodiments of the present invention may be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each embodiment may be implemented independently of each other or may be implemented together in a related relationship. may be

Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the accompanying drawings. Like reference numerals refer to substantially identical elements throughout. In the following description, if it is determined that a detailed description of a known function or configuration related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted or briefly described.

Hereinafter, a mirror type display device according to an embodiment of the present invention will be described with reference to FIG. 1 .

1 is a cross-sectional view schematically illustrating a mirror type display device according to an exemplary embodiment of the present invention.

Referring to FIG. 1 , a mirror type display device according to an embodiment of the present invention includes a display panel DP and a mirror unit MP attached to the display panel DP by an adhesive layer AD.

The display panel DP includes a first substrate SUB1 and a pixel array disposed on the first substrate SUB1 to display an input image. The pixel array may include pixels defined by intersections of data lines and gate lines. Pixels are arranged in a matrix form at intersections of data lines and gate lines. Each of the pixels may include a light emitting diode that is a self-emission device or a liquid crystal cell. The example of FIG. 1 shows a case in which a pixel is formed of a light emitting diode, which is a self-light emitting device.

On the first substrate SUB1 of the display panel DP, a thin film transistor layer TL including a thin film transistor disposed in each pixel region, a light emitting part EP connected to each thin film transistor of the thin film transistor layer TL; An encapsulation film ENC sealing each light emitting part EP may be included.

The thin film transistors constituting the thin film transistor layer TL may be implemented as p-type or n-type. In addition, the semiconductor layer of the TFTs constituting the pixel may include amorphous silicon, polysilicon, or oxide.

The light emitting part EP includes a first electrode E1 connected to the thin film transistor of the thin film transistor layer TL, an organic layer OL disposed on the first electrode E1, and an organic layer OL disposed on the organic layer OL. A second electrode E2 is included. The organic layer includes an emission layer (EML), a hole injection layer (HIL) and a hole transport layer (HTL) disposed on one side of the emission layer, and an electron transport layer (Electron) disposed on the other side of the emission layer It may include a transport layer (ETL) and an electron injection layer (EIL).

The encapsulation film ENC is a layer that prevents moisture or air from penetrating from the outside and protects it from external impact, and may have a structure in which an organic film and an inorganic film are alternately stacked.

The mirror unit MP includes a second substrate SUB2 and a reflection plate RE disposed on one surface of the second substrate SUB2 . The reflective plate RE includes an opening OP formed to correspond to the light emitting part EP disposed in each pixel. The light generated by the light emitting unit EP is emitted through the opening OP of the reflective plate RE.

Hereinafter, the reflector RE of the mirror type display device according to the first embodiment of the present invention will be described in more detail with reference to FIG. 2 .

2 is a plan view illustrating a reflection plate of the mirror type display device according to the first embodiment of the present invention.

Referring to FIG. 2 , the reflector RE may include openings RO, GO, and BO exposing the R (red), G (green), and B (blue) emission regions of the light emitting part.

In FIG. 2 , the openings RO, GO, and BO of the reflector RE include red openings RO for transmitting red light, green openings GO for transmitting green light; and blue openings BO for transmitting blue light. The four green openings GO are arranged to form a first rectangle surrounding the one red opening RO, and among the green openings surrounding the red opening RO, two green openings and the other two green openings are blue It is disposed to form a second quadrangle surrounding the opening BO.

According to this configuration, four green openings GO are arranged to surround the red opening RO, and four green openings GO are arranged to surround the blue opening BO adjacent thereto, and the four green openings GO are arranged adjacent thereto. Two of the openings GO are arranged to share the adjacent red opening RO and the blue opening BO. The openings RO, GO, and BO of the reflector RE are based on the area of the same light emitting region. It is formed so that the slit size can be maximized. Accordingly, the openings RO, GO, and BO of the reflector RE are formed in a circular shape. When the openings RO, GO, and BO of the reflection plate RE are formed in a circular shape, the distance from the center of the circle to the circumference is the same at any position on the circumference. Accordingly, since the openings have slits of the same size, it is possible to obtain the effect of maximally suppressing the diffraction phenomenon that occurs when the light emitted from the light emitting area passes through the openings.

Although the red opening RO, the green opening GO, and the blue opening BO have the same size in the embodiment of FIG. 2 , the present invention is not limited thereto. For example, in the case of an electroluminescent display device, the sizes of the red opening RO, the green opening GO, and the blue opening BO may be set differently to correspond to the area of the light emitting part EP. It should be construed as belonging to the present invention.

Next, the reflecting plate RE of the mirror type display device according to the second embodiment of the present invention will be described in more detail with reference to FIGS. 3 to 5 .

3 is a plan view illustrating a reflection plate of a mirror type display device according to a second embodiment of the present invention. FIG. 4 is a plan view showing the region A shown in FIG. 3 in more detail, and FIG. 5 is a simulation view for diffraction of light appearing according to the opening of the reflector shown in FIG. 3 .

Although FIG. 3 shows that the red, green, and blue openings RO1 , GO1 , BO1 ; RO2 , GO2 , and BO2 of the reflector RE have the same size, those having different sizes also belong to the present invention. Accordingly, FIG. 4 showing a partial area A of FIG. 3 shows the openings RO1, GO1, BO1; RO2, It should be clearly understood that the depiction of configurations with different sizes of GO2 and BO2) does not depart from the scope of FIG. 3 .

The example of FIG. 4 exemplifies the case of an electroluminescent display, and the lifespan of the light emitting material used in the light emitting layer emitting red, green, and blue light varies according to material properties. In the electroluminescent display device, a light emitting material emitting red light has a longer lifespan than a light emitting material emitting green light, and a light emitting material emitting green light has a longer lifespan than a light emitting material emitting blue color. Therefore, in order to approximately equalize the lifetime of the three-color light-emitting material, the area of the light-emitting layer of the light-emitting material of the short-lived color should be larger than the area of the light-emitting layer of the light-emitting material of the long-lived color. This is because, if the area is increased, the current density per unit area can be lowered, thereby extending the device lifespan. As a result, the area of the red light emitting layer is smaller than that of the green light emitting layer, and the area of the green light emitting layer is smaller than the area of the blue light emitting layer.

Accordingly, the areas of the openings RO1 , GO1 , BO1 ; RO2 , GO2 , and BO2 of the reflector RE may also be formed in the following order of size, as illustrated in FIG. 4 .

Red opening (RO1) < Green opening (GO1) < Blue opening BO1)

3 and 4 , in the area A of the reflector RE, the first opening OP1 and the second opening OP2 corresponding to the unit pixels P1 and P2 including the red, green, and blue light emitting units, respectively. ) are placed adjacent to each other.

The first opening OP1 includes a first red opening RO1 , a first green opening GO1 , and a first blue opening BO1 , and the second opening OP2 includes a second red opening RO2 and a second opening BO1 . It includes two green openings GO1 and a second blue opening BO2 .

Lines connecting the centers of the first red opening RO1, the first green opening GO1, and the first blue opening BO1 of the first opening OP1 form a triangle, and the first red opening RO1 ) and the first green opening GO1 are arranged such that a line connecting the centers thereof forms a first vertical line with respect to one side of the reflector RE.

Lines connecting the centers of the second red opening RO2, the second green opening GO2, and the second blue opening BO2 of the second opening OP2 also form a triangle, and the second red opening RO2 ) and the second green opening GO2 are arranged such that a line connecting the centers thereof forms a second vertical line spaced apart from the first vertical line by a predetermined distance.

If the first opening OP1 and the second opening OP2 are repeatedly arranged in the horizontal direction and the vertical direction in this way, the configuration of FIG. 3 may be obtained.

In the configuration of FIG. 3 , a line connecting the center of the first red opening RO1 , the center of the first green opening GO1 , and the center of the first blue opening BO1 may be arranged to be a straight line. However, the present invention is not limited thereto, and may be disposed as shown in FIG. 4 .

Referring to FIG. 4 , the first red opening RO1 and the first green opening GO1 are disposed such that a line connecting the centers of the first blue light emitting layer BO1 on the left side is positioned on a vertical line, and the second The red opening RO2 and the second green opening GO2 are configured such that a line connecting the center of the blue light emitting layer BO1 on a right side is disposed on a vertical line.

The arrangement of the first red opening RO1 and the first green opening GO1, the second red opening RO2, and the second green opening GO2 with the blue light emitting layer BO1 as the center will be described in more detail as follows. same.

First, the center of the circle constituting the first blue opening BO1 is B1, the center of the circle constituting the first red opening RO1 is R1, the midpoint of the circle constituting the first green opening GO1 is G1, A center of a circle constituting the second red opening RO2 is denoted by R2, and a center of a circle constituting the second green opening GO2 is denoted by G2.

The line segment connecting the center R1 of the first red opening RO1 and the center B1 of the blue opening BO1 is R1B1, and the center G2 of the second green opening GO2 and the center B1 of the first blue opening BO1 are connected. Assuming that the line segment G2B1 and the line segment connecting the center R1 of the first red opening RO1 and the center G2 of the second green opening GO2 is R1G2, the first angle θ1 is formed by the line segment R1B1 and the line segment R1G2, and the line segment A second angle θ2 is formed by G2B1 and the line segment R1G2.

A line connecting the center R1 of the first red opening RO1 and the center B1 of the first blue opening BO1 is R1B1, the center G2 of the second green opening GO2 and the center B1 of the first blue opening BO1 are Assuming that the connecting line segment is G2B1, and the line segment connecting the center R1 of the first red opening portion RO1 and the center G2 of the second green opening portion GO2 is R1G2, the first angle θ1 is formed by the line segment R1B1 and the line segment R1G2. , a second angle θ2 is formed by the line segment G2B1 and the line segment R1G2.

A line segment connecting the center R2 of the second red opening RO2 and the center B1 of the first blue opening BO1 is R2B1, the center G1 of the first green opening GO1 and the center B1 of the first blue opening BO1 are If the connecting line segment is G1B1, and the line segment connecting the center R2 of the second red opening part RO2 and the center G1 of the first green opening part GO1 is R2G1, the third angle θ3 is formed by the line segment R2B1 and the line segment R2G1. , a fourth angle θ4 is formed by the line segment G1B1 and the line segment R2G1. The first angle θ1 to the fourth angle θ4 may be arbitrarily set at an angle greater than 0 and less than 90 degrees.

When the openings of the reflector shown in FIG. 3 are arranged in the manner shown in FIG. 4 , the center lines of the first red opening RO1 , the first blue opening BO1 , and the second green opening GO2 do not coincide with each other. Therefore, it is possible to reduce the degree of overlap of the diffraction phenomenon, so that the effect of reducing the diffraction phenomenon can be obtained.

FIG. 5 is a simulation diagram for a diffraction phenomenon of light appearing according to the configuration shown in FIG. 4, and it can be seen that the interference fringe due to the diffraction phenomenon is weakened.

Next, the reflector RE of the mirror type display device according to the third embodiment of the present invention will be described in more detail with reference to FIGS. 6 to 8 .

6 is a plan view illustrating a reflection plate of a mirror type display device according to a third embodiment of the present invention. FIG. 7 is a plan view showing the region B shown in FIG. 6 in more detail, and FIG. 8 is a simulation view for diffraction of light appearing according to the opening of the reflector shown in FIG. 6 .

Although FIG. 6 shows that the red, green, and blue openings RO1 , GO1 , BO1 ; RO2 , GO2 , and BO2 of the reflector RE have the same size, different sizes also belong to the present invention. Accordingly, FIG. 7 showing a partial area A of FIG. 6 shows the openings RO1, GO1, BO1; RO2, of the reflector RE according to the size of the red (R), green (G), and blue (B) emission areas It should be clearly understood that the depiction of configurations with different sizes of GO2 and BO2) does not depart from the scope of FIG. 6 .

The example of FIG. 7 exemplifies the case of the electroluminescent display device as in FIG. 4 . The area of the red light emitting layer may be smaller than that of the green light emitting layer, and the area of the green light emitting layer may be formed smaller than the area of the blue light emitting layer.

6 and 7 , in the region B of the reflector RE, a first opening OP1 corresponding to the unit pixels P1 , P2 , P3 , and P4 including the red, green, and blue light emitting units, respectively, is provided. The second opening OP2 , the third opening OP3 , and the fourth opening OP4 are vertically and horizontally adjacent to each other.

The first opening OP1 includes a first red opening RO1 , a first green opening GO1 , and a first blue opening BO1 . The second opening OP2 is disposed in a right direction of the first opening RO1 , and includes a second red opening RO2 , a second green opening GO2 , and a second blue opening BO2 . The third opening OP3 is disposed below the first opening RO1 , and includes a third red opening RO3 , a third green opening GO3 , and a third blue opening BO3 . The fourth opening OP4 is disposed in a right direction of the third opening OP3 and a lower direction of the second opening OP2 , and includes a fourth red opening RO4 , a fourth green opening GO4 , and a fourth blue opening. (BO4).

Lines connecting the centers of the first red opening RO1 , the first green opening GO1 , and the first blue opening BO1 of the first opening OP1 form a first triangle, and the first red opening A line connecting RO1 and the center of the first green opening GO1 is disposed to have a predetermined angle with respect to a vertical line passing through the center of the first red opening RO1.

Lines connecting the centers of the second red opening RO2 , the second green opening GO2 , and the second blue opening BO2 of the second opening OP2 also form a second triangle, the second red opening A line connecting RO2 and the center of the second green opening GO2 is disposed to have a predetermined angle with respect to a vertical line passing through the center of the second red opening RO2.

Lines connecting respective centers of the third red opening RO3, the third green opening GO3, and the third blue opening BO3 of the third opening OP3 form a third triangle, and the third red opening A line connecting RO3 and the center of the third green opening GO3 is disposed to have a predetermined angle with respect to a vertical line passing through the center of the third red opening RO3.

Lines connecting the centers of the fourth red opening RO4 , the fourth green opening GO4 , and the fourth blue opening BO4 of the fourth opening OP4 also form a fourth triangle, and the fourth red opening BO4 A line connecting RO4 and the center of the fourth green opening GO4 is disposed to have a predetermined angle with respect to a vertical line passing through the center of the fourth red opening RO4.

Also, the center a of the first triangle and the center b of the second triangle are connected, the center b of the second triangle and the center c of the third triangle are connected, and the center c of the third triangle and the center d of the fourth triangle are connected. When connected, a rectangular shape can be obtained.

If the first opening OP1, the second opening OP2, the third opening OP3, and the fourth opening OP4 are repeatedly arranged in the horizontal and vertical directions in this way, the configuration of FIG. 6 can be obtained do.

Referring to FIG. 7 , a line connecting the center of the first red opening RO1 and the center of the first green opening GO1 forms the center of the first red opening RO1 on the left side of the first blue light emitting layer BO1 . A line connecting the center of the second red opening RO2 and the center of the second green opening GO2 is arranged to have a predetermined angle with the vertical line passing through it and connects the center of the first blue light emitting layer BO1 on the right side. A line is disposed to have a predetermined angle with a vertical line passing through the center of the second red opening RO2.

The arrangement of the first red opening RO1 and the first green opening GO1, and the second red opening RO2 and the second green opening GO2 centered on the first blue light emitting layer BO1 will be described in more detail. As follows.

First, the center of the circle constituting the first blue opening BO1 is B1, the center of the circle constituting the first red opening RO1 is R1, the midpoint of the circle constituting the first green opening GO1 is G1, A center of a circle constituting the second red opening RO2 is denoted by R2, and a center of a circle constituting the second green opening GO2 is denoted by G2.

The line segment connecting the center R1 of the first red opening RO1 and the center B1 of the blue opening BO1 is R1B1, and the center G2 of the second green opening GO2 and the center B1 of the first blue opening BO1 are connected. Assuming that the line segment G2B1 and the line segment connecting the center R1 of the first red opening RO1 and the center G2 of the second green opening GO2 is R1G2, the first angle θ1 is formed by the line segment R1B1 and the line segment R1G2, and the line segment A second angle θ2 is formed by G2B1 and the line segment R1G2.

A line segment connecting the center R2 of the second red opening RO2 and the center B1 of the first blue opening BO1 is R2B1, and the center G1 of the first green opening GO1 and the center B1 of the blue opening BO1 are connected. Assuming that the line segment G1B1 and the line segment connecting the center R2 of the second red opening RO2 and the center G1 of the first green opening GO1 is R2G1, the third angle θ3 is formed by the line segment R2B1 and the line segment R2G1, and the line segment A fourth angle θ4 is formed by G1B1 and the line segment R2G1. The first angle θ1 to the fourth angle θ4 may be arbitrarily set at an angle greater than 0 and less than 90 degrees.

When the openings of the reflector shown in FIG. 6 are arranged in the same manner as shown in FIG. 7 , the center lines of the first red opening RO1 , the first blue opening BO1 , and the second green opening GO2 do not coincide with each other. and a line connecting the center of the first red opening and the center of the first green opening is the center of the third red opening RO3 of the third opening OP3 positioned below the first opening OP1 and the third green Since it does not form a straight line with the line connecting the centers of the opening GO3, the degree of overlap of the diffraction phenomenon can be further reduced compared to the second embodiment, so that the effect of reducing the diffraction phenomenon can be obtained.

FIG. 8 is a simulation diagram for a diffraction phenomenon of light appearing according to the configuration shown in FIG. 7, and it can be seen that the interference fringe due to the diffraction phenomenon is further weakened.

Next, with reference to FIG. 9, an effect obtainable from the reflector of the mirror type display device according to the embodiment of the present invention will be described.

9 is a view showing a reflection image of a display panel and a mitral photograph obtained by the diffraction phenomenon of the reflector structure (Comparative Examples 1 to 3) according to the prior art and the reflector according to the first embodiment of the present invention.

Referring to FIG. 9 , Comparative Example 1 shows that the reflective plate opening is formed in a triangular and rhombus shape, and diffraction patterns are generated in the horizontal, vertical, and diagonal directions by diffraction of light passing through the opening. .

Comparative Example 2 is a case in which the openings of the reflecting plate are formed in triangles having different sizes, and shows that diffraction patterns are generated in the shape of stars by diffraction of light passing through the openings.

Comparative Example 3 is a case in which the openings of the reflector are formed in quadrilaterals having different sizes, and shows that diffraction patterns are generated in an X-shape by diffraction of light passing through the openings.

In contrast, the reflector structure according to the first embodiment of the present invention is a case in which the opening is formed in a circular shape, and the diffraction pattern is generated in a dotted circular shape, so that the interference fringe due to diffraction is much suppressed compared to Comparative Examples 1-3. can be known

Those skilled in the art from the above description will be able to see that various changes and modifications are possible without departing from the technical spirit of the present invention. In the example shown in the present invention, an electroluminescent display device has been described as an example, but the present invention is not limited thereto, and a liquid crystal display device (LCD), a plasma display panel (PDP), an electric field It can be applied to various flat panel display devices, such as a field emission display device (FED), and an electrophoretic display device (ED). Accordingly, the technical scope of the present invention should not be limited to the content described in the detailed description of the invention, but should be defined by the claims.

SUB1, SUB2: substrate TL: thin film transistor layer
EP: light emitting unit RE: reflector
OP, OP1, OP2, OP3, OP4: opening
RO1, RO2, RO3, RO4: red opening,
GO1, GO2, GO3, GO4: green opening
BO1, BO2, BO3, BO4: Blue opening

Claims (8)

a display panel including a plurality of light emitting units; and
and a reflective plate disposed on the display panel and having a plurality of openings through which light emitted from the plurality of light emitting units is transmitted;
The openings of the reflector are circular,
The plurality of openings may include a first color opening that transmits light of a first color, second color openings that transmit light of a second color, and a third color opening that transmits light of a third color having an opening;
The first color opening is arranged to be surrounded by a first rectangle connecting the centers of the four second color openings to each other,
The third color opening is arranged to be surrounded by a second rectangle connecting the centers of the four second color openings,
A side connecting the centers of the two second color openings of the first rectangle and a side connecting the centers of the two second color openings of the second rectangle are the same side shared by the first rectangle and the second rectangle mirror display. The method of claim 1,
A mirror-type display device in which an area of the plurality of openings of the reflection plate is set in proportion to an area of the light emitting part. delete a display panel including a plurality of light emitting units; and
and a reflective plate disposed on the display panel and having a plurality of openings for transmitting light emitted from the plurality of light emitting units, wherein the openings of the reflective plate are circular;
The plurality of openings,
a first color opening through which light of a first color transmits, a second color opening spaced apart from the first color opening, and a second color opening through which light of a second color transmits, and a third color opening spaced apart from the first and second color openings; a first opening having a third color opening through which colored light is transmitted; and
a fourth color opening spaced apart from the third color opening of the first opening to transmit the light of the first color; a second opening having a fifth color opening and a sixth color opening spaced apart from the fourth and fifth color openings to transmit light of the third color;
A line connecting the center of the first color opening, the center of the second color opening, and the center of the third color opening forms a first triangle, the center of the fourth color opening and the center of the fifth color opening and a line connecting the centers of the sixth color openings form a second triangle,
A line connecting the center of the first color opening and the center of the third color opening and the line connecting the center of the first color opening and the center of the fifth color opening have a predetermined angle. 5. The method of claim 4,
The first color opening and the second color opening are alternately arranged in a first direction, and a line connecting the center of the first color opening and the center of the second color opening forms a vertical line. . 5. The method of claim 4,
The first color opening and the second color opening are alternately arranged in a first direction, and a line connecting the center of the first color opening and the center of the second color opening forms a predetermined angle with respect to a vertical line. mirror display. delete 5. The method of claim 4,
The plurality of openings,
a seventh color opening spaced apart from the second color opening of the first opening to transmit light of the first color; an eighth color opening spaced from the seventh color opening to transmit light of the second color; and a third opening spaced apart from the seventh and eighth color openings and having a ninth color opening for transmitting light of the third color; and
A tenth color opening spaced apart from the ninth color opening of the third opening and the fifth color opening of the second opening to transmit the light of the first color, the second color opening spaced apart from the tenth color opening and a fourth opening spaced apart from the tenth and eleventh openings and having a twelfth color opening through which light of the third color is transmitted;
A third triangle is formed by a line connecting the center of the seventh color opening of the third opening, the center of the eighth color opening, and the center of the ninth color opening,
A fourth triangle is formed by a line connecting the center of the tenth color opening of the fourth opening, the center of the eleventh color opening, and the center of the twelfth color opening,
A mirror type display device in which a quadrangle is formed by a line connecting a center of the first triangle, a center of the second triangle, a center of the third triangle, and a center of the fourth triangle.

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