KR20100101733A - Lgiht unit and display apparatus having the same - Google Patents

Abstract

PURPOSE: A light unit and a light emitting module is provided to tiled a bottom unit arranged in a light emitting module, thereby improving the light directions angles. CONSTITUTION: A first light emitting module(125) has a light emitting diode and is tilted to a first angle on a bottom cover. A plurality of light emitting diodes is arrayed with at least one row on a substrate and on the substrate. A light unit(145) comprises a light member arranged on the first light emitting module. The bottom cover has a first bottom part which is tilted at a first angle.

Description

Light unit and display device having same {LGIHT UNIT AND DISPLAY APPARATUS HAVING THE SAME}

The embodiment relates to a light unit and a display device having the same.

The display device is a CRT (Cathode Ray Tube), a liquid crystal display (LCD) using an electro-optic effect, a plasma display device (PDP: Plasma Display Panel) using a gas discharge and an EL display device using an electroluminescent effect (ELD: Electro Luminescence Display), among which researches on liquid crystal displays are being actively conducted.

Since most liquid crystal display devices are light-receiving devices that display an image by controlling the amount of light coming from the outside, a separate light source for illuminating the LCD panel, that is, a backlight unit, is required.

The embodiment provides a light unit including a light emitting module tilted at a predetermined angle and a display device having the same.

The embodiment provides a light unit including a light emitting module having a direction angle pattern tilted at a predetermined angle, and a display device having the same.

The embodiment provides a light unit including a light emitting module having a bottom portion tilted on a bottom cover and a light emitting diode disposed on the bottom portion, and a display device having the same.

The embodiment provides a light unit in which a light emitting module is disposed on a bottom portion having a three-dimensional shape, and a display device having the same.

Light unit according to the embodiment, the bottom cover; A first light emitting module having a light emitting diode and tilted at a first angle to the bottom cover; It includes an optical member disposed on the first light emitting module.

A bottom cover having a first bottom part tilted at a first angle; A first light emitting module having a light emitting diode and disposed on the first bottom portion of the bottom cover; A light unit including an optical member disposed on the first light emitting module; And a display panel on the light unit.

According to the embodiment, the light directing angle of the light emitting diode may be improved by tilting the bottom portion on which the light emitting module is disposed.

The embodiment can reduce the number of light emitting diodes.

Embodiments can prevent hot spots or brightness unevenness.

Hereinafter, with reference to the accompanying drawings as follows.

1 is an exploded perspective view illustrating a display device according to a first embodiment, and FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1.

Referring to FIG. 1, the display device 100 includes a bottom cover 110, light emitting modules 125, 126, and 127, an optical sheet 140, and a display panel 150. The bottom cover 110, the light emitting modules 125, 126, and 127, and the optical sheet 140 may function as the light unit 145.

A groove 111 having a predetermined depth may be formed in the bottom cover 110, and a sidewall 113 vertical or inclined with respect to a flat horizontal plane may be formed around the groove 111. The side wall 113 may be formed or removed as a separate structure, but is not limited thereto.

The bottom cover 110 may be made of aluminum (Al), magnesium (Mg), zinc (Zn), titanium (Ti), tantalum (Ta), hafnium (Hf), niobium (Nb), and the like. It is not limited to.

The bottom cover 110 has a flat bottom portion 112 and first and second bottom portions 114 and 116 tilted at predetermined angles on a portion of the flat bottom portion 112.

The first bottom part 114 and the second bottom part 116 may be formed in a three-dimensional shape such as a right triangle shape, and the first bottom part 114 is formed on an extension line of the flat bottom part 112. The second bottom portion 116 is inclined in one direction by the first angle θ1, and the second bottom portion 116 faces the first bottom portion 114 in the reverse direction of the first direction on an extension line of the flat bottom portion 112. Inclined by the second angle θ2.

The first angle θ1 is formed between 0 <θ1 <90 °, and the second angle θ2 is formed between 0 <θ2 <90 ° and at opposite angles. In addition, the first angle θ1 and the second angle θ2 may be the same angle or different angles. In addition, the positions of the first bottom part 114 and the second bottom part 116 may be formed at positions symmetrical to each other or asymmetric positions.

The light emitting modules 125, 126, and 127 are disposed on the bottom cover 110, and the optical sheet 140 and the display panel 150 are disposed on the light emitting modules 125, 126, and 127.

The first light emitting module 125 is disposed on the first bottom portion 114 of the bottom cover 110, and the second light emitting module 126 is disposed on the second bottom portion 116. The third light emitting module 127 is disposed on the flat bottom 112.

The first to third light emitting modules 125, 126, and 127 may be arranged in one or a plurality in the horizontal direction or the vertical direction of the bottom cover 110. In addition, the first and second light emitting modules 125 and 126 may be disposed to face each other with respect to the center line in the horizontal or vertical direction of the bottom cover 110.

According to an embodiment, the third light emitting module 127 and the first light emitting module 125 may be alternately arranged, and the third light emitting module 127 and the second light emitting module 126 may be alternately arranged. Three light emitting modules 125, 126, and 127 may be alternately arranged. In addition, the first light emitting module 125 and the second light emitting module 126 may be alternately arranged.

A plurality of first light emitting modules 125 may be disposed in one region based on the center line of the bottom cover 110, and a plurality of second light emitting modules 126 may be disposed in the other region. The tilt angles of the plurality of first light emitting modules 125 or the second light emitting module 126 may be formed at the same or different angles within 0 <first angle <90 ° or 0 <second angle <90 °. In this case, the tilt angle may be made smaller toward the outer direction based on the center line of the bottom cover.

The first to third light emitting modules 125, 126, and 127 may include a substrate 121 and a light emitting diode 122. The substrate 121 may include a flexible PCB, a metal PCB, and a general PCB. Is a configuration in which a plurality of substrates are arranged in at least one column. The light emitting diode 122 may be mounted in a packaged form after being mounted as an LED chip, or may be mounted in a packaged state, and may include colored LEDs (RED LED, GREEN LED, BLUE LED, etc.) or white LEDs having at least one color. It may include, but is not limited to this.

1 and 2, the light unit 145 includes a third light emitting module 127 disposed on the flat bottom 112 of the bottom cover 110, and a second light emitting module 125 tilted at both sides thereof. ) And a third light emitting module 126 are disposed. The first to third light emitting modules 125, 126, and 127 may emit light with light directivity angle patterns in different directions, thereby improving the overall light directivity angle.

The first light emitting module 125 forms a direction angle pattern A2 oriented in a vertical direction in the left direction, and the second light emitting module 126 is a direction angle pattern oriented in a vertical direction in a right direction ( A3) is formed, and the first light emitting module 127 forms a directivity angle pattern A1 directed in the vertical direction. By irradiating light with the directivity angle patterns A1, A2, and A3 in the different directions, hot spots or luminance unevenness can be eliminated, and uniform luminance and chromaticity can be provided.

The first and second light emitting modules 125 and 126 may be tilted to increase a distance between the light emitting modules.

The optical sheet 140 is disposed at predetermined intervals from the light emitting modules 125, 126, and 127, and includes one or more sheets and / or one or more kinds of optical sheets. The optical sheet 140 may optionally include a diffusion sheet, a prism sheet, an illuminance enhancement film, a protective sheet, and the like. The diffusion sheet diffuses the incident light, the horizontal and vertical prism sheets focus the incident light onto the display area, and the brightness enhancement film makes the luminance distribution uniform.

The display panel 150 is disposed on the optical sheet 140. The display panel 150 may be implemented as a liquid crystal display panel and displays information by light emitted from the light emitting modules 125, 126, and 127.

3 is a side cross-sectional view of the light unit according to the second embodiment. In the description of the second embodiment, the same parts as in the first embodiment will be denoted by the same reference numerals and redundant description thereof will be omitted.

Referring to FIG. 3, the light unit 145A includes a plurality of light emitting modules 124 tilted in the first direction.

Two inclined surfaces 115A and 115B may form predetermined interior angles θ3, θ4, and θ5 at the bottom of the bottom cover 110, and a cross section may be formed in a triangular shape. The two inclined surfaces 115A and 115 may be symmetrical or asymmetrical, and the inner angles θ3, θ4 and θ5 of the two inclined surfaces 115A and 115B may be the same or different. In addition, any one of the two inclined surfaces 115A and 115 may not be formed, but is not limited thereto.

The light emitting module 124 may be disposed on the first inclined plane 115A and / or the second inclined plane 115B, and the directivity angle pattern A5 emits light in a diagonal orientation pattern instead of the vertical image direction. I will investigate. The degree of overlap of the directivity angle patterns A5 may vary according to the arrangement interval of the triangular structures having the two inclined surfaces 115A and 115B and the inner angles θ3, θ4 and θ5 of the two inclined surfaces 115A and 115B.

The two inclined surfaces 115A and 115B may be integrally injection-molded at the bottom of the bottom cover 110 or may be disposed at the bottom of the bottom cover 110 as a separate structure, but is not limited thereto.

4 is a view illustrating a light unit according to a third embodiment, FIG. 5 is a partially enlarged view of the polygonal body of FIG. 3, and FIG. 6 is a sectional view taken along the line B-B of FIG. 5.

4 and 5, in the light unit 145B, a plurality of polygons 117 are formed on the flat bottom portion 112 of the bottom cover 110. The plurality of polygons 117 may be spaced apart from each other at predetermined intervals, or may be arranged in at least one row or zigzag form.

At least one light emitting module 128 is disposed on at least one side of the polygon 117. At least one light emitting diode 122 may be mounted on the light emitting module 128 on the substrate 121A.

The polyhedron 117 may be formed in the shape of a polygonal pyramid or pyramid, such as an equilateral triangular pyramid, a pyramidal pyramid (for example, pyramid shape). The polyhedron 117 is an example, and the light emitting module 128 may be tilted by injection molding in a three-dimensional shape such as a rhombus shape, a trapezoid shape, a random three-dimensional shape, or the like.

The light emitting module 128 may be disposed on any one side, both sides, or all sides of the polyhedron 117, which may vary depending on the position of the polyhedron 117, but is not limited thereto.

The substrate 121A may be attached to the side surface of the polyhedron 117, and the size of the substrate 121A may be less than or equal to the size of each side surface of the polyhedron 117. Can be.

In addition, a plurality of lead wires 129 may be drawn out from the substrate 121A, and the lead wires 129 may be electrically connected in series or in parallel with the substrate 121A of another module, or may be bottom cover 110. It may be electrically connected to the circuit board disposed at the bottom of the.

Here, one polyhedron 117 and the light emitting module 128 disposed therein may function as one cluster, and in each cluster, the light directing angle is improved by irradiating light in a diagonal direction except for the vertical image direction. Can give It can also make the light unit slim.

At the bottom of the bottom cover 110, a reflective sheet may be disposed in an area where the polygonal body 117 is not formed.

5 and 6, the inner angle θ6 of the polyhedron 117 may be formed between 0 <θ6 <60 °, and this angle may vary depending on the formation of a three-dimensional structure or a desired orientation angle pattern. Can be.

The light emitting module according to the embodiment is not limited to the corresponding embodiment, and may be mixed with other embodiments and reconfigured, and may be changed within the technical scope. The light emitting module may be used as a light source such as a lighting device, an indicator device, or a display device.

Although the technical spirit of the embodiments has been described in detail according to the above-described preferred embodiments, it should be noted that the above-described embodiments are for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various implementations are possible within the scope of the technical idea of the present invention.

1 is an exploded perspective view of a display device according to a first embodiment.

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a side cross-sectional view of the light unit according to the second embodiment.

4 is a perspective view of a light unit according to a third embodiment.

5 is an enlarged view of the polyhedron of FIG. 4.

6 is a sectional view taken along the line B-B in FIG.

Claims (13)

Bottom cover; A first light emitting module having a light emitting diode and tilted at a first angle to the bottom cover; And a light member disposed on the first light emitting module. The method of claim 1, And a first bottom part tilted at a first angle with respect to the flat bottom part of the bottom cover under the first light emitting module. The method of claim 1, And a second light emitting module having a second bottom portion tilted at a second angle with respect to the flat bottom portion of the bottom cover, and a light emitting diode disposed on the second bottom portion. The method according to claim 2 or 3, And a third light emitting module having a flat bottom portion on the bottom cover and a light emitting diode disposed on the flat bottom portion. The method of claim 3, The first and second light emitting module includes at least one, The light unit is disposed to face each other about the center line in the horizontal or vertical direction of the bottom cover. The method of claim 2, A plurality of first light emitting modules or second light emitting modules are disposed in one region of the center line of the bottom cover. The plurality of first light emitting module or the second light emitting module is formed with the same angle or different angles within 0 <angle <90 ° with respect to the center line of the bottom cover. The method of claim 2, The bottom cover includes a plurality of first bottom portions having a predetermined interval and a plurality of first light emitting modules disposed in a first direction thereon, The side section of the first bottom part is formed in a triangular shape. The method of claim 2, The first bottom portion of the bottom cover is formed of at least one polyhedron, The first light emitting module is disposed on at least one side of the polygon. The method of claim 8, The first light emitting module may include a substrate having a size less than or equal to each side of the polygon; A light unit comprising at least one light emitting diode disposed on the substrate. The method of claim 1, The first light emitting module includes a substrate and a plurality of light emitting diodes arranged on at least one column on the substrate. The method of claim 1, And a reflective sheet disposed on the bottom cover. The method of claim 1, The light unit including a side wall formed around the bottom cover. A bottom cover having a first bottom part tilted at a first angle; A first light emitting module having a light emitting diode and disposed on the first bottom portion of the bottom cover; A light unit including an optical member disposed on the first light emitting module; And And a display panel on the light unit.

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