KR102609364B1 - Display apparatus - Google Patents

Abstract

The present invention relates to a display device that reflects light emitted from a light source toward a display panel through a reflective member without a corresponding structure to the light guide plate. The light emitted from the light source uniformly reaches the reflective member so that uniform light is transmitted to the display panel. A plurality of light sources are arranged in a zigzag shape on the substrate so that the light can be incident on the substrate, and the spacing between the plurality of light sources is formed unevenly, so that even if the substrate is placed on one side of the reflective member, light can be irradiated uniformly to the entire area of the reflective member.

Description

Display device {DISPLAY APPARATUS}

The present invention relates to a display device with an improved backlight unit.

In general, a display device is a device that displays a screen and includes a monitor or television. The display device uses a self-luminous display panel such as an organic light-emitting diode (OLED) and a light-receiving display panel such as a liquid crystal display (LCD) panel.

The present invention relates to a light-receiving display panel and includes a display panel made of a liquid crystal panel to display a screen, and a backlight unit disposed on the rear side of the display panel.

The backlight unit is disposed behind the display panel and includes a light emitting diode module, which is a light source that generates light. Light generated from a light source is irradiated to the display panel, but if the light source is placed on one side of the display panel, light cannot be irradiated uniformly to the entire display panel, causing a problem in that a difference in luminance occurs across the entire screen.

One aspect of the present invention provides a display device that can abundantly irradiate light to all sections of a display panel by arranging light sources non-uniformly.

Another aspect of the present invention provides a display device including an auxiliary member so that light irradiated from a light source can be smoothly irradiated to the reflective member when the light irradiated from the light source is irradiated to the display panel through the reflective member.

A display device according to the spirit of the present invention includes a display panel, a top chassis provided in front of the display panel, an optical sheet disposed behind the display panel, a diffusion plate disposed behind the optical sheet, and a top chassis disposed behind the display panel. A bottom chassis including a substrate on which a plurality of light sources are arranged and a first reflection member disposed behind the diffusion plate and reflecting light irradiated from the plurality of light sources toward the diffusion plate, and light irradiated from the plurality of light sources A second reflecting member is disposed between the plurality of light sources and the first reflecting member to reflect the light toward the first reflecting member so that the plurality of light sources reaches the first reflecting member, and the substrate is configured to allow the plurality of light sources to reach the first reflecting member. It is disposed at an angle toward the second reflective member to face the second reflective member, and the plurality of light sources are arranged in a zigzag shape on the substrate.

Additionally, the plurality of light sources are disposed in a first area provided at an end side of the substrate and a second area provided at a center side of the substrate, and the distance between the plurality of light sources disposed in the first area is the second area. It is different from the spacing between the plurality of light sources arranged in the area.

Additionally, the spacing between the plurality of light sources arranged in the first area is wider than the spacing between the plurality of light sources arranged in the second area.

Additionally, the gap between the plurality of light sources gradually narrows from the first area to the second area.

Additionally, the plurality of light sources are arranged in two rows in the longitudinal direction of the substrate.

Additionally, the plurality of light sources are arranged so as not to overlap each other based on the direction in which they are arranged.

Additionally, one surface of the substrate includes an installation surface on which the plurality of light sources are installed, and the installation surface is disposed toward the bottom chassis so that the plurality of light sources face the bottom chassis.

Additionally, the installation surface is inclined at an angle of approximately 30 degrees with respect to the display panel.

Additionally, the second reflection member is coupled to the installation surface.

Additionally, the second reflecting member includes a reflecting surface having a parabolic curved surface.

Additionally, the reflective surface is provided in a concave shape toward the plurality of light sources.

Additionally, the substrate is a display device coupled to the bottom chassis.

A display device according to the spirit of the present invention includes a display panel, a top chassis provided in front of the display panel, an optical sheet disposed behind the display panel, a diffusion plate disposed behind the optical sheet, and radiating light toward the display panel. A plurality of light sources are installed and include a substrate including a long side and a short side, and a bottom chassis that supports the substrate and is spaced apart from the rear of the diffusion plate, and between the plurality of light sources arranged in a direction in which the long side extends. The gap becomes narrower toward the center of the substrate, and the plurality of light sources are arranged so that at least part of the light source overlaps in the direction in which the short side extends.

Additionally, at least a portion of the light emitted from the plurality of light sources is reflected from the bottom chassis and reaches the diffusion plate.

Additionally, the bottom chassis includes a first reflection member that reflects irradiated light toward the diffusion plate.

Additionally, the first reflection member includes a concave curved surface toward the diffusion plate.

Additionally, a second reflection member is provided between the plurality of light sources and the bottom chassis to reflect light toward the bottom chassis so that at least a portion of the light emitted from the plurality of light sources reaches the bottom chassis.

Additionally, the reflective member reflects light emitted from the plurality of light sources in one direction.

Additionally, the reflective member includes a reflective surface provided in a parabolic curved shape.

A display device according to the spirit of the present invention includes a display panel, a top chassis provided in front of the display panel, an optical sheet disposed behind the display panel, a diffusion plate disposed behind the optical sheet, and a top chassis disposed behind the display panel. A bottom chassis including a substrate on which a plurality of light sources is installed and a first reflection member disposed behind the diffusion plate and reflecting light irradiated from the plurality of light sources toward the diffusion plate, and light irradiated from the plurality of light sources and a second reflecting member disposed between the plurality of light sources and the first reflecting member to reflect the light toward the first reflecting member so as to reach the first reflecting member, and arranged in the longitudinal direction of the substrate. The spacing between the plurality of light sources is set to have different lengths between the spacing at the end side of the substrate and the spacing at the center side of the substrate, and the plurality of light sources are arranged in two rows in a direction perpendicular to the one direction.

Additionally, at least a portion of the light emitted from the plurality of light sources is refracted by the second reflecting member, reflected by the first reflecting member, and reaches the diffusion plate.

The present invention has the effect of varying the spacing between the plurality of light sources and arranging them in multiple rows, so that the light generated from the light sources can be evenly irradiated to the entire section of the display panel, thereby ensuring uniformity in dispersion of the light irradiated to the display panel.

In addition, there is an effect that light generated from a plurality of light sources can be easily irradiated to the display panel through a reflective member without a light guide plate or the like.

1 is a perspective view of a display device according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of a display device according to an embodiment of the present invention.
Figure 3 is a side cross-sectional view of a display device according to an embodiment of the present invention.
Figure 4 is a perspective view of a partial configuration of a display device according to an embodiment of the present invention.
Figure 5 is a diagram schematically showing a path along which light is irradiated in a display device according to an embodiment of the present invention.
Figure 6 is a diagram schematically showing a path along which light is irradiated in a display device according to an embodiment of the present invention.
Figure 7 is a front view of a substrate of a display device according to an embodiment of the present invention.
Figure 8 is a perspective view of the configuration of a reflective member of a display device according to an embodiment of the present invention.
Figure 9 is a front view of a substrate of a display device according to another embodiment of the present invention.
Figure 10 is a front view of a substrate of a display device according to another embodiment of the present invention.
Figure 11 is an exploded perspective view of a display device according to another embodiment of the present invention.
Figure 12 is an exploded perspective view of a display device according to another embodiment of the present invention.

The embodiments described in this specification and the configurations shown in the drawings are only preferred examples of the disclosed invention, and at the time of filing this application, there may be various modifications that can replace the embodiments and drawings in this specification.

In addition, the same reference numbers or symbols shown in each drawing of this specification indicate parts or components that perform substantially the same function.

Additionally, the terms used herein are used to describe embodiments and are not intended to limit and/or limit the disclosed invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. The existence or addition of numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

In addition, terms including ordinal numbers such as “first”, “second”, etc. used in this specification may be used to describe various components, but the components are not limited by the terms, and the terms It is used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention. The term “and/or” includes any of a plurality of related stated items or a combination of a plurality of related stated items.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

The terms front and front used hereinafter refer to the front and the direction facing forward relative to the display device 1 shown in FIG. 1, and rear refers to the direction toward the rear of the display device 1.

The description of the present invention takes the flat display device 1 as an example, but can also be applied to a curved display device or a bendable or flexible display device in which the curved state and the flat state are variable.

In addition, it can be applied to all display devices (1) regardless of screen size. For example, products that can be installed on tables, walls, ceilings, such as smart televisions and monitors, tablets, laptops, smart phones, etc. It can also be applied to portable products such as ebooks.

In addition, the backlight unit described below has a plurality of light sources, but depending on the need for explanation, it may be described as a 'light source' or as a 'plural light source'. However, there is no change in the fact that they are arranged in plural numbers on the light source substrate according to an embodiment of the present invention.

FIG. 1 is a perspective view of a display device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a display device according to an embodiment of the present invention, and FIG. 3 is a side view of a display device according to an embodiment of the present invention. It is a cross-sectional view, and Figure 4 is a perspective view of a partial configuration of a display device according to an embodiment of the present invention.

A display device (1) includes a display panel (10) on which an image is displayed, and a diffusion plate disposed behind the display panel (10) to diffuse light transmitted from the rear side and transmit it to the display panel (10) located on the front side. (30) is provided between the display panel 10 and the diffusion plate 30 to improve the optical characteristics of the light diffused by the diffusion plate 30. On the front side of the optical sheet 20 and the display panel 10 It may include a top chassis 40 coupled to the top chassis 40 and a bottom chassis 50 coupled to the rear side of the top chassis 40 and supporting the display panel 10. In addition, although not shown in the drawing, it may further include a middle mold (not shown) coupled between the top chassis 40 and the bottom chassis 50 to support the display panel 10.

The display panel 10 may be made of a liquid crystal panel formed by encapsulating liquid crystal (not shown) between two glass substrates (not shown) each provided with an electrode.

The optical sheet 20 is a diffusion sheet that re-diffuses the light transmitted through the diffusion plate 30, and a prism strip that condenses the diffused light in a direction perpendicular to the display panel 10 and protects the prism sheet. It may include sheets, etc.

The top chassis 40 is disposed at the front of the display panel 10 and may be combined with the bottom chassis 50 disposed at the rear. The display panel 10, the optical sheet 20, and the diffusion plate 30 are disposed between the top chassis 40 and the bottom chassis 50, and the space formed by combining the top chassis 40 and the bottom chassis 50 It can be supported by the bottom chassis 50 within. In addition, although not shown, the display panel 10, etc. is supported by a middle mold (not shown) provided between the top chassis 40 and the bottom chassis 50, and the middle mold (not shown) is connected to the top chassis 40 and the bottom chassis 50. The front and back can be supported by the bottom chassis 50.

According to an embodiment of the present invention, the top chassis 40 can form the front appearance of the display device 1 without a separate cover member. However, the present invention is not limited to this, and a separate front cover covering the top chassis may be provided to define the appearance of the display device 1.

The bottom chassis 50 is disposed at the rear of the display panel 10 and can support the display panel 10 as described above. Additionally, as will be described later, the substrate 100 including the light source 101 and the first and second reflecting members 110 and 120 can be supported.

Although not shown, a rear cover may be provided on the rear of the bottom chassis 50 to form the rear exterior of the display device 1, and the exterior itself may be formed without a separate cover member like the top chassis 40. there is.

A substrate 100 on which a plurality of light sources 101 are installed may be disposed on the lower side of the bottom chassis 50. The light source 101 is a point light source that can be thinned into a thin screen and may include a light emitting diode (LED).

In the case of a conventional display device, a direct type is used in which light is directly irradiated by arranging light emitting diodes in the rear area facing the entire surface of the display panel, and light emitting diodes are arranged on the end surface of the light guide plate, especially on both sides, to irradiate light to the light guide plate. Light was irradiated to the display in an edge-type manner, causing surface light to be emitted from the display unit by the light guide plate.

In the case of the direct type, a substrate for light-emitting diodes that covers the entire surface of the display panel is required, so a large number of light-emitting diodes are required. Each light-emitting diode includes a lens that diffuses light, so the substrate is enlarged and the built-in components are installed. There was a problem of increased cost because there were many of these, and in the case of the edge type, an additional light guide plate was included, which could limit the molding of the product, and the insertion of the light guide plate could cause the problem of the thickness of the display panel becoming thicker.

To solve this problem, in the display device according to an embodiment of the present invention, in order to use the minimum light source 101, the substrate 100 including the light source 101 is disposed on only one side of the bottom chassis 50, and the substrate 100 including the light source 101 is placed on the bottom instead of the light guide plate. By including reflective members 110 and 120 that can be easily mounted on the chassis 50, light can be effectively irradiated toward the display panel 10.

In detail, the substrate 100 may be disposed on the lower side of the bottom chassis 50, and the light source 101 may be disposed inclined toward the bottom chassis 50 so that the light source 101 faces toward the bottom chassis 50. The substrate 100 may be provided in the shape of a rectangular plate with one side extending long, and may include an installation surface 102 on which a plurality of light sources 101 are arranged.

The substrate 100 may be disposed on the front lower side of the bottom chassis 50 by a support member 130 coupled to the bottom chassis 50 and disposed to protrude toward the front of the bottom chassis 50 . The support member 130 may further support not only the substrate 100 but also the second reflection member 120, which will be described later. The support member 130 may be provided to be detachable from the substrate 100, but is not limited to this and may be provided to be molded integrally with the bottom chassis 50.

In addition, the present invention is not limited to one embodiment, and the substrate 100 may be supported by a structure other than the support member 130, and the substrate 100 may be directly coupled to the bottom chassis 50. Additionally, it may be arranged in the same configuration as the middle mold other than the bottom chassis 50 and placed on the lower front of the bottom chassis 50.

A first reflection member 110 may be disposed on the front side of the bottom chassis 50 to reflect light generated from the light source 101 to the display panel 10. According to one embodiment of the present invention, the substrate 100 is disposed only on one side of the display device 1, so light cannot be uniformly irradiated to the entire area of the display panel 10. Accordingly, the light uniformity of the display panel 10 changes and the luminance on the screen is not uniform, which may reduce the reliability of the performance of the display device 1.

Accordingly, the light generated from the light source 101 is reflected through the first reflecting member 110 provided on the front of the bottom chassis 50 with an area corresponding to the display panel 10 and spreads over the entire area of the display panel 10. Light can be irradiated without being concentrated on one side.

According to an embodiment of the present invention, the light emitted from the light source 101 may be reflected by the first reflective member 110 disposed on the front side of the bottom chassis 50 and directed toward the display panel 10. , but is not limited to this, and the light emitted from the light source 101 may be directly reflected on the bottom chassis 50 and irradiated toward the display panel 10.

In other words, the bottom chassis 50 can perform the same role as a reflective member without a separate configuration. To increase the efficiency of light reflection, a release material may be coated or applied to the front of the bottom chassis 50, and a reflective sheet may be used. A light may be attached to the front part of the bottom chassis 50.

Between the substrate 100 and the first reflecting member 110, there is a gap between the substrate 100 and the first reflecting member 110 so that the light generated from the light source 101 can smoothly reach the first reflecting member 110. It may include a second reflecting member 120 disposed.

As shown in FIG. 4, the second reflecting member 120 is disposed adjacent to the substrate 100 and can reflect at least a portion of the light generated from the light source 101 toward the first reflecting member 110. there is.

The second reflecting member 120 may be provided in the form of a reflector. The second reflecting member 120 may include a reflecting surface 121 that is disposed on the side facing the light source 101 and has a curved surface to reflect the light emitted from the light source 101 toward the first reflecting member 110. there is.

The reflective surface 121 may include a concave curved surface toward the light source 101 and may reflect incident light toward the first reflective member 110.

The second reflection member 120 is disposed on the front lower side of the bottom chassis 50 to correspond to the substrate 100 and may be supported by the support member 130. It is disposed between the substrate 100 and the first reflective member 110 in the front-back direction on the display device 1 and can guide at least a portion of the light emitted from the light source 101 to the second reflective member 120. This will be described in detail later.

The present invention is not limited to one embodiment, and the substrate 100 may be disposed on the side or upper side of the bottom chassis 50 . In this case, the second reflective member 120 may be disposed corresponding to the side on which the substrate 100 is disposed, and the reflective surface 121 of the second reflective member 120 is connected to the light source 100 and the first reflective member ( 110) and can be formed concavely toward.

Additionally, the substrate 100 may be disposed on not only one side of the bottom chassis 50 but also on multiple sides. Preferably, it can be placed on the opposite side. That is, it may be symmetrically disposed on the upper and lower sides or on both sides of the bottom chassis 50, respectively. In this case, the second reflecting member 120 is provided to correspond to the number of substrates 100 and can reflect the light irradiated from the light source 101 disposed on each substrate 100 to the first reflecting member 110. .

Hereinafter, the light generated from the light source 101 is irradiated to the display panel 10 (or diffusion plate 30, hereinafter collectively described as the display panel 10) through the first and second reflection members 110 and 120. The process is explained in detail.

Figures 5 and 6 are diagrams schematically showing a path through which light is irradiated in a display device according to an embodiment of the present invention, Figure 7 is a front view of the substrate of the display device according to an embodiment of the present invention, and Figure 8 is a perspective view of the configuration of a reflective member of a display device according to an embodiment of the present invention.

As shown in FIG. 5, the substrate 100 may be arranged so that the light source 101 faces the first and second reflective members 110 and 120. In detail, the installation surface 102 of the substrate 100 may be arranged to face the bottom chassis 50. Accordingly, the installation surface 102, which is the surface on which light is irradiated, may be arranged to face the opposite side of the display panel 10.

The substrate 100 may be inclined so that light from the light source 101 can reach the upper part H1 of the first reflective member 110. The angle at which light is irradiated from the light emitting diode of the light source 101 is usually around 120 degrees, but when the substrate 100 is placed horizontally to the direction in which the first reflecting member 110 extends, the angle of the first reflecting member 110 This is because the amount of light that can reach the upper part (H1) is reduced.

Accordingly, the substrate 100 is disposed at an angle, and the angle at which it is inclined relative to the display panel 10 may preferably be approximately 30 degrees. However, it is not limited to this and may vary depending on the shape in which the first and second reflecting members 110 and 120 are formed.

As described above, unlike existing edge-type or direct-type display devices, the substrate 100 is disposed only on one side of the display device 1 having a quadrangular appearance, and the other side is not disposed on the substrate 100. The amount of light irradiated may decrease.

In detail, according to one embodiment of the present invention, since the substrate 100 is disposed on the lower side of the bottom chassis 50, the lower part (H2) of the first reflecting member 110, which is a side adjacent to the substrate 100, is relative to the lower part (H2) of the first reflecting member 110. However, a large amount of light may not be irradiated to the upper part H1 of the first reflective member 110, which is the other side spaced apart from the substrate 100.

Accordingly, as the light irradiated to the first reflection member 110 is overall non-uniform, the light reflected thereby and directed to the display panel 10 may also be irradiated to the display panel 10 non-uniformly.

That is, there is relatively more light on the side of the display panel 10 corresponding to the lower part (H2) of the first reflecting member 110 than on the side of the display panel 10 corresponding to the upper part (H1) of the first reflecting member 110. irradiation, and thus the luminance of the upper and lower sides of the display panel 10 may be distributed differently, and a dark portion may be formed on the upper side of the display panel 10 with low luminance.

The second reflecting member 120 can be placed between the light source 101 and the first reflecting member 110 in order to spray the light focused on the lower part (H2) of the first reflecting member 110 to the upper part (H1). there is.

In detail, the reflecting surface 121 of the second reflecting member 120 is provided to have a concave curved surface toward the light source 101 and the first reflecting member 110, so that the light irradiated from the light source 101 is transmitted to the first reflecting member ( 110) can be reflected to the side.

The reflective surface 121 may include a parabolic curved surface. Additionally, the reflective surface 121 of the light source 101 may be placed at the focus of the parabola. Additionally, the first reflecting member 110 may be disposed in the direction in which the axis of the parabola of the reflecting surface 121 faces.

When the light emitted from the light source 101 reaches the reflecting surface 121, the light may be reflected by the reflecting surface 121 and reflected in a direction parallel to the axis of the parabola. This is because, as described above, the light source 101 is disposed at the focus of the parabola of the reflection surface 121.

Accordingly, all of the light L1 reflected through the reflective surface 121 may be directed in one direction in parallel. The surface of the first reflecting member 110 is disposed in the parabolic axis direction of the reflecting surface 121, so that all light L1 reflected through the reflecting surface 121 can reach the first reflecting member 110.

In detail, the light L1 irradiated from the light source 101 toward the reflecting surface 121 is reflected in the parabolic axis direction of the reflecting surface 121 and reaches the upper part (H1) of the first reflecting member 110. It can be directed toward the display panel 10 by the first reflection member 110.

If there is no second reflecting member 120, all light corresponding to L1 is irradiated to the lower part (H2) of the first reflecting member 110 and is transmitted to the upper (H1) and lower part (H2) of the first reflecting member (110). Although the difference in uniformity of the irradiated light may be very large, a portion of the light irradiated to the lower part (H2) of the first reflecting member 110 by the second reflecting member 120 is transmitted to the upper part (H1) of the first reflecting member 110. It can reach the side and cancel out the difference in irradiation amount.

As shown in FIG. 5, part of the light emitted from the first light source 101 may be light L1 that passes through the second reflective member 120 and heads to the upper part H1 of the first reflective member 110. The light L2 irradiated to be directed upward from the second reflecting member 120 may be reflected directly on the first reflecting member 110 rather than toward the second reflecting member 120 and may reach the display panel 10. . A part of L2 may reach the lower part (H2) of the first reflecting member 110 and the other part may reach the upper part (H1) of the first reflecting member 110.

Additionally, another part of the light emitted from the light source 101 may be emitted directly toward the display panel 10 without being reflected by the reflective members 110 and 120 (L3).

As described above, the light source 101 is disposed on the lower part (H2) of the first reflection member 110 in order to offset the light uniformity that occurs when most of the light emitted from the light source 101 reaches the lower part (H2). A portion of the light reaching the lower part (H2) was reflected to the upper part (H1) through the second reflecting member (120).

The reflecting surface 121 of the second reflecting member 120 has a parabolic shape and can focus and effectively direct the light reflected through the reflecting surface 121 to the first reflecting member 110, but the reflected light is directed in one direction. There is a problem that only goes to .

At this time, when the position of the light source 101 disposed at the focus of the parabola of the reflecting surface 121 is changed, the focal length may change and the area where the reflected light reaches the first reflecting member 110 may vary.

In addition, when light reaches the first reflecting member 110 directly from the light source 101, if the position where the light source 101 is placed is changed, the angle of the light irradiated to the first reflecting member 110 changes, resulting in more reflections. 1. Light may be irradiated to the area of the reflecting member 110.

To this end, as shown in FIG. 7, the light source 101 may not be arranged in a row on the substrate 100 but in a zig-zag shape. In the case of a conventional substrate, the light sources are arranged in a row on the substrate, so the light is irradiated only at a certain location, and the angle at which the light is irradiated to the display panel or light guide plate is constant.

As shown in FIG. 6, in the case of the present invention, a plurality of light sources 101 are arranged alternately in two rows A1 and A2 on the substrate 100 to increase the angle of light irradiated to the reflective members 110 and 120.

That is, when the plurality of light sources 101 are arranged in a row in A1 or A2 as in the existing invention, the angle at which the light is irradiated will be constant, but when the plurality of light sources 101 are arranged in this row in A1 and A2, the second reflecting member 120 The angle of light irradiated to the side or the angle of light irradiated directly to the first reflecting member 110 increases, so that light uniformity can be maintained more consistently.

Assuming that the maximum irradiation angle of the light LA1 irradiated from the light source 101 arranged in the A1 column and the light LA2 irradiated from the light source 101 arranged in the A2 column each is approximately 120 degrees, as shown in FIG. 6 In LA1, the position of the light source 101 arranged in the A1 row is located above the light source 101 arranged in the A2 row and is further spaced apart from the first reflecting member 50, so the position of the first reflecting member 110 is greater than that of LAB. A large amount can reach the upper part (H1).

Therefore, light can be uniformly irradiated to the entire area of the first reflection member 110, so that light can be reflected from the surface area of the first reflection member 110 and be uniformly incident on the entire area of the display panel 10. .

As shown in FIG. 7 , the light source 101 may include a long side 103 extending to one side of the substrate 100 and a short side 104 perpendicular to the long side 103. The long side 103 may extend in the left and right directions of the display panel 10, that is, in the longitudinal direction of the display panel 10.

The plurality of light sources 101 may be arranged in a direction in which the long side 103 extends. As described above, the plurality of light sources 101 may be arranged based on columns A1 and A2 located at different positions with respect to the direction in which the short side 104 extends.

The plurality of light sources 101 may be spaced apart with a gap between the light sources 101 . Assuming that the direction in which the long side 103 extends is the

In addition, when the direction in which the short side 104 extends is called the Y-axis, the gap formed between A1 and A2 in the Y-axis direction is a number provided so that some areas of the plurality of light sources 101 arranged at A1 and A2 overlap with respect to the Y-axis. there is. This is because if the length between A1 and A2 becomes longer, the angle at which light is irradiated increases, the amount of light irradiated to the outside of the first and second reflective members increases, and the irradiated light density may decrease.

However, the present invention is not limited to one embodiment, and the distance between A1 and A2 may vary depending on the areas of the display panel 10 and the first reflective member 110. Additionally, it may vary depending on the difference in the gap provided between the substrate 10 and the first and second reflecting members 110 and 120. That is, the distance between A1 and A2 may vary depending on the degree to which the display panel 10, the substrate 100, and the reflective members 110 and 120 are disposed inside the display device 1. In some cases, the length between A1 and A2 may be long so that the plurality of light sources 101 arranged in columns A1 and A2 can be spaced apart from each other based on the Y axis.

As shown in FIG. 8, the first reflection member 110 may be provided to correspond to the shape of the bar bottom chassis 50 supported by the bottom chassis 50. The first reflection member 110 may be provided in a concave shape in both left-right and up-down directions.

The first reflection member 110 includes a concave portion 111 provided in a concave shape toward the display panel 10. The concave portion 111 may be provided in a concave shape in the vertical direction by the upper reflective surface 113 and the lower reflective surface 112, and is also concave in the left and right directions by the side reflective surfaces 114 provided on both sides. It can be prepared by:

The upper, lower, and side reflective surfaces 112, 113, and 114 may be disposed at an angle so that the center side of the concave portion 111 is concave toward the rear. Additionally, the upper, lower, and side reflective surfaces 112, 113, and 114 may include a curved shape, but are not limited thereto and may include a straight shape.

The first reflection member 110 may include expanded polystyrene (EPS) material. EPS material may have multiple fine pores arranged on the surface area. Accordingly, a plurality of fine pores are provided on the surface area of the first reflecting member 110, and the light incident on the first reflecting member 110 is not only reflected regularly but also diffusely reflected by the plurality of pores and may be directed toward the display panel 10. .

The light incident on the entire surface of the upper and lower side reflection surfaces (112, 113, 114) is reflected diffusely, so that the light is not reflected toward the display panel 10 in a unidirectional state, but is reflected in multiple directions and is incident on the display panel 10. can be formed relatively uniformly.

The side reflective surface 114 may be disposed adjacent to the substrate 100 (see FIG. 4), whereby the amount of light incident on the side reflective surface 114 increases with respect to the upper reflective surface 112 and the lower reflective surface. It may be more than the (113) side.

When the amount of light incident on each of the reflective surfaces 112, 113, and 114 becomes uneven, it is difficult for the light density to be uniformly incident on the entire area of the display panel 10, as described above. Therefore, when a plurality of light sources 101 are arranged at equal intervals in the direction of the long side 103 of the substrate 100, the amount of light incident on the center side of the display panel 10 is relatively reduced, so that a dark portion is formed on the center side of the display panel 10. Problems may arise that may form.

In order to prevent this, the spacing between the plurality of light sources 101 can be varied and the number of the plurality of light sources 101 arranged in the direction of the long side 103 can be varied depending on the area in which they are arranged. That is, when the area adjacent to the end of the substrate 100 is defined as the first area (A) and the area adjacent to the center of the substrate 100 is defined as the second area (B), a plurality of light sources disposed in the first area The number of light sources 101 can be varied by increasing the distance DA between the light sources 101 to be larger than the distance DB between the light sources 101 disposed in the second area B.

The length of DA of the plurality of light sources 101 arranged in the first area (A) is relatively longer than the length of DB, so the number of light sources 101 arranged in the second area (B) may be smaller than the number of light sources 101 arranged in the second area (B). .

As described above, the first reflecting member 110 has a shape that becomes concave toward the center, so the substrate 100 and the first reflecting member move from the first area (A) to the second area (B) of the substrate 110. The surfaces of (110) may be spaced apart.

Accordingly, the distance between the plurality of light sources 101 becomes narrower toward the center of the second area B, so that the largest amount of light sources 101 can be arranged in the center of the second area B.

The gap DA1 formed at the end of the first area A is longer than the gaps DA2 and DA3 arranged toward the center, and the lengths of DA2 and DA3 are closer to the center of the substrate 100 as they move toward DA3. If it is arranged accordingly, it can be arranged to gradually decrease.

Additionally, the length of DB1 provided adjacent to the first area (A) in the second region (B) may be longer than the length of DB2 disposed at the center of the substrate 100.

However, the distance between the plurality of light sources 101 according to an embodiment of the present invention is not limited to this and may be provided differently depending on the shape in which the first reflecting member 110 is formed. This will be explained below.

Hereinafter, a display device 1 according to another embodiment of the present invention will be described. Configurations other than the substrates 100' and 100" and the first inclined member described below are the same as those of the display device 1 according to the above-described embodiment of the present invention, so their descriptions are omitted.

9 and 10 are front views of a substrate of a display device according to another embodiment of the present invention.

As described above, the arrangement of the plurality of light sources 101' arranged on the substrate 100' according to the shape of the first inclined member may be formed differently from the arrangement of the light sources 101 according to an embodiment of the present invention. .

As shown in FIG. 9, the plurality of light sources 101' may be arranged with the same spacing D in the direction in which the long side 103 extends.

Although not shown in the drawing, if the first inclined member does not have a side reflective surface 114 and is composed of an upper reflective surface 113 and a lower reflective surface 112, unlike in one embodiment of the present invention, the first inclined member is It can be provided in a concave shape only in the vertical direction. At this time, a certain amount of light may be uniformly incident on the first reflecting member from the plurality of light sources 101' in the direction of the long side 103 of the substrate 100'.

Accordingly, even if the plurality of light sources 101' are arranged at equal intervals with respect to the long side 103 direction, a uniform amount of light can be radiated to the left and right sides of the display panel 10.

Unlike this, a plurality of concave portions of the first inclined member may be provided and some portions may be formed in a convex shape. Accordingly, in order to uniformly offset the amount of light, the concave portion of the substrate 100' corresponding to the portion provided is formed. In the area, the spacing between the plurality of light sources 101' is narrowed so that the plurality of light sources 101' can be concentrated, and the first inclined member is disposed relatively adjacent to the substrate 100' compared to the concave portion. A relatively small number of light sources 101' may be disposed in the area of the substrate 100' corresponding to .

As shown in FIG. 10, the length between columns A1 and A2 can be formed to be long so that the plurality of light sources 101" arranged in A1 and A2 based on the Y axis do not overlap. In this case, the light sources 101" arranged in columns A1 and A2 are The distance between the plurality of light sources 101" is formed to be relatively large, so that a large angle at which light can be irradiated in the vertical direction can be provided.

Therefore, even when the substrate 100" and the first inclined member are disposed at a relatively large interval, the angle of light that can be irradiated from the plurality of light sources 101" is large, so that the light is uniformly distributed over the entire area of the first inclined member. can be investigated.

In addition, a plurality of light sources 101" disposed in columns A1 and A2 may be arranged to overlap with respect to the Accordingly, the plurality of light sources 101" may be freely arranged to be overlapped with respect to the

The display device 1 according to an embodiment of the present invention is configured to irradiate light to the display panel 10 through the reflecting members 110 and 120 without using a light guide plate, and since the light guide plate is not used, the thickness of the display panel 10 is reduced. can be formed thinly, and the manufacturing cost can be reduced by excluding the light guide plate configuration.

However, the light guide plate serves to irradiate a uniform amount of light from the light source to the display panel 10. In the absence of the light guide plate, it is difficult to irradiate a uniform amount of light to the display panel 10.

To solve this problem, the light density irradiated to the display panel 10 can be adjusted by arranging the plurality of light sources 101 arranged on the substrate 100 non-uniformly in the up and down and left and right directions.

Hereinafter, a display device 1' according to another embodiment of the present invention will be described. Since the configuration described below is the same as the configuration of the display device 1 according to an embodiment of the present invention described above, the description thereof will be omitted.

Figure 11 is an exploded perspective view of a display device according to another embodiment of the present invention.

The above-described substrate 100 can also be applied to a conventional direct-type display device 1'. As shown in FIG. 11, the display device 1' according to another embodiment of the present invention is arranged to be spaced apart from the rear side of the display panel 1 forming the screen and the display panel 10, and includes a display panel ( 10) may include a substrate 200 on which a light source 201 that supplies light is installed.

In addition, the display device 1' includes a middle mold 60 that supports the display panel 10, and a top chassis 40 that maintains the display panel 10 supported on the front side of the middle mold 60. It may include a bottom chassis 50 that accommodates the substrate 100 and is coupled to the middle mold 13 to maintain the substrate 100 disposed on the rear side of the middle mold 60.

A reflective sheet 90 may be provided on the inner side of the bottom chassis 50 to reflect light irradiated toward the inner side of the bottom chassis 50 toward the display panel 10.

Between the display panel 10 and the substrate 200, there is a diffusion member 30 for diffusing the light supplied from the light source 201, and an optical sheet for improving the optical characteristics of the light transmitted through the diffusion member 30 ( 20) can be placed.

The front side of the light source 201 may include a lens that diffuses light generated from a plurality of light emitting diodes operating as the light source 201. The lens serves to diffuse the light generated from the light emitting diode so that an even distribution of light can be transmitted to the display panel 10 as a whole.

The substrate 200 is formed in a square bar shape and includes a plurality of printed circuit boards 200 spaced apart from each other up and down, and a plurality of light sources 201 are installed spaced apart from each other on the plurality of substrates 200. Accordingly, the light sources 201 are arranged to be spaced apart from each other up and down and left and right on the rear side of the display panel 11.

As described above, even in the direct display device 1', if the amount of light incident on the display panel 10 is not uniform, a problem in which a dark area may be formed on the screen may occur. In order to solve this problem, the light sources 201 arranged on the substrate 200 can be arranged to be staggered in this row.

The length of this column may vary depending on the size of the display panel 10, the distance between the display panel 10 and the substrate 200, the number of substrates 200, etc. Additionally, although not shown, the spacing between the plurality of light sources 201 on the substrate 200 may be non-uniform. The interval between the plurality of light sources 201 may also be freely determined according to the above-mentioned conditions.

Hereinafter, a display device 1" according to another embodiment of the present invention will be described. The configuration described below is the same as the configuration of the display device 1" according to an embodiment of the present invention described above. omit.

Figure 12 is an exploded perspective view of a display device according to another embodiment of the present invention.

The above-described substrate 100 can also be applied to a conventional edge-type display device 1".

The display device 1" may include a display panel 10, an optical sheet 20, a top chassis 40, a bottom chassis 50, and a cover 90 forming the rear of the bottom chassis. Additionally, the display A substrate 300 is disposed at the rear of the panel 10 and on which the light source 301 is installed, and may include a light guide plate 70 provided to guide the light emitted from the light source 301 to the display panel 10. The light guide plate 70 converts the light emitted from the light source 301 into a surface light source and directs it to the display panel 10. Additionally, the light guide plate 70 may include a reflective sheet 71.

The light source 301 may be provided on at least a portion of the circumference of the light guide plate 70 to irradiate light. The light source 301 may be disposed along the short side or the long side of the light guide plate 70. The position of the light source 301 is not limited, and it is sufficient as long as it is disposed along at least a portion of the circumference of the light guide plate 70 to irradiate light to the light guide plate 70. Additionally, the light source 301 may be disposed on at least one side of the display panel 10 within the bottom chassis 50 . As an example, as shown in FIG. 12, the light source 301 may be placed in a pair on both rear sides of the display panel 10, but is not limited to this and may be placed on one side of the display module 10. there is.

The inside of the top chassis 40 and the bottom chassis 50 may further include a middle mold 60 on which at least some of the internal components can be seated. The middle mold 60 may be provided to support the optical sheet 20 and/or the display panel 10 while fixing the light guide plate 70.

The light emitted from the light source 301 is reflected by the reflective sheet 71 provided on the rear side of the bottom chassis 50 and is guided to the display panel 10. That is, the reflective sheet 71 serves to guide the light emitted from the light source 301 to the display panel 10.

The light source 301 may be disposed at an edge portion of the light guide plate 70 . The light source 301 may be disposed on both sides of the space between the light guide plate 70 and the inner surface of the bottom chassis 50, that is, on the bottom side of the second chassis 50. Accordingly, light emitted from the light source 301 may be irradiated to the rear part of the bottom chassis 50 through the space between the light guide plate 70 and the rear part of the bottom chassis 50.

The light guide plate 70 may be provided to allow light emitted from the light source 301 to pass through. The light guide plate 70 may be formed of a transparent resin material so that light emitted from the light source 301 can pass through. Additionally, the light guide plate 70 may be disposed at a certain distance from the light source 301 to reduce deformation caused by heat generated from the light source 301.

The light source 301 disposed on the substrate 300 may be disposed in a zigzag shape in the direction in which the substrate extends. In the case of the edge-type display device 1", the light density irradiated to the display panel 10 can be made uniform by the light guide plate 70, but as in another embodiment of the present invention, the substrate 300 has a plurality of By varying the arrangement of the light source 301, the density of light incident on the light guide plate 70 can be uniformly adjusted to increase the efficiency of the light guide plate 70.

The present invention is not limited to the embodiments described above, and it is obvious to those skilled in the art that various modifications and changes can be made without departing from the spirit of the present invention. Therefore, it should be said that modifications or variations fall within the scope of the patent claims of the present invention.

1: Display device 10: Display panel
20: optical sheet 30: diffusion plate
40: Top Chassis 50: Bottom Chassis
100: substrate 101: light source
102: Installation surface 110: First reflecting member
111: concave portion 112: lower reflective surface
113: upper reflective surface 114: side reflective surface
120: second reflecting member 121: reflecting surface
130: Support member

Claims (20)

display panel;
a top chassis provided in front of the display panel;
An optical sheet disposed behind the display panel;
a diffusion plate disposed behind the optical sheet;
a substrate disposed behind the display panel and on which a plurality of light sources are arranged;
a bottom chassis disposed behind the diffusion plate and including a first reflection member that reflects light emitted from the plurality of light sources toward the diffusion plate;
A second reflecting member disposed between the plurality of light sources and the first reflecting member to reflect the light toward the first reflecting member so that the light emitted from the plurality of light sources reaches the first reflecting member,
The substrate is disposed to be inclined toward the second reflecting member so that the plurality of light sources face toward the second reflecting member,
The second reflecting member includes a reflecting surface including a parabolic curved surface,
Both the first reflecting member and the second reflecting member are disposed on one side of the plurality of light sources,
The plurality of light sources are arranged in two or more rows in a zig-zag shape on the substrate, and are positioned on the focal point of the reflective surface to reflect light from the reflective surface in a direction parallel to the axis of the parabola of the reflective surface. A display device in which two or more rows are arranged. According to claim 1,
The plurality of light sources are disposed in a first area provided at an end side of the substrate and a second area provided at a center side of the substrate,
A display device wherein an interval between the plurality of light sources arranged in the first area is different from an interval between the plurality of light sources arranged in the second area. According to claim 2,
A display device wherein an interval between the plurality of light sources arranged in the first area is wider than an interval between the plurality of light sources arranged in the second area. According to claim 3,
A display device in which an interval between the plurality of light sources gradually narrows from the first area to the second area. According to claim 1,
A display device wherein the plurality of light sources are arranged in two rows in the longitudinal direction of the substrate. According to claim 5,
A display device in which the plurality of light sources are arranged without overlapping each other based on the direction in which they are arranged. According to claim 1,
One surface of the substrate includes an installation surface on which the plurality of light sources are installed, and the installation surface is arranged toward the bottom chassis so that the plurality of light sources face the bottom chassis. According to claim 7,
A display device wherein the installation surface is inclined at an angle of 30 degrees with respect to the display panel. delete According to claim 1,
A display device wherein the reflective surface is provided in a concave shape toward the plurality of light sources. According to claim 1,
A display device wherein the substrate is coupled to the bottom chassis. display panel;
a top chassis provided in front of the display panel;
An optical sheet disposed behind the display panel;
a diffusion plate disposed behind the optical sheet;
a substrate including a long side and a short side on which a plurality of light sources that irradiate light toward the display panel are installed;
It includes a bottom chassis that supports the substrate and is spaced apart from the rear of the diffusion plate,
The bottom chassis includes a reflective surface having a parabolic curved surface and is disposed on one side of the plurality of light sources rather than the other side,
The gap between the plurality of light sources arranged in the direction in which the long side extends becomes narrower toward the center of the substrate,
The plurality of light sources are arranged so that at least part of the light source overlaps in the direction in which the short side extends, are arranged on the substrate in a zig-zag shape of two or more rows, and are symmetrical from the reflective surface to the reflective surface. A display device in which two or more rows are arranged on the focus of the reflective surface to reflect light in a direction parallel to the axis. According to claim 12,
A display device wherein at least a portion of the light emitted from the plurality of light sources is reflected from the bottom chassis and reaches the diffusion plate. According to claim 12,
The bottom chassis includes a first reflection member that reflects irradiated light toward the diffusion plate. According to claim 14,
The first reflection member is a display device including a concave curved surface toward the diffusion plate. According to claim 15,
A display device wherein a second reflection member is provided between the plurality of light sources and the bottom chassis to reflect light toward the bottom chassis so that at least a portion of the light emitted from the plurality of light sources reaches the bottom chassis. According to claim 16,
A display device wherein the first and second reflective members reflect light emitted from the plurality of light sources in one direction. delete display panel;
a top chassis provided in front of the display panel;
An optical sheet disposed behind the display panel;
a diffusion plate disposed behind the optical sheet;
a substrate disposed behind the display panel and on which a plurality of light sources are installed;
a bottom chassis disposed behind the diffusion plate and including a first reflection member that reflects light emitted from the plurality of light sources toward the diffusion plate;
A second reflecting member disposed between the plurality of light sources and the first reflecting member to reflect the light toward the first reflecting member so that the light emitted from the plurality of light sources reaches the first reflecting member,
The second reflecting member includes a reflecting surface having a parabolic curved surface,
Both the first reflecting member and the second reflecting member are disposed on one side of the plurality of light sources, and there is no reflecting member disposed on the other side of the plurality of light sources,
The spacing between the plurality of light sources arranged in the longitudinal direction of the substrate is set at different lengths from the spacing at the end side of the substrate to the spacing at the center side of the substrate,
The plurality of light sources are arranged alternately in two rows in a direction perpendicular to one direction, and are arranged in two or more rows on the focus of the reflecting surface to reflect light from the reflecting surface in a direction parallel to the axis of symmetry of the reflecting surface. The display device on which it is placed. According to claim 19,
A display device wherein at least a portion of the light emitted from the plurality of light sources is refracted by the second reflecting member, reflected by the first reflecting member, and reaches the diffusion plate.

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