TWI683158B - Illumination device and liquid crystal display module thereof - Google Patents

Abstract

An illumination device comprises a heat sink, a light bar and a barrier member. The heat sink includes a bottom plate, a standing plate and a support portion. The support portion is disposed on an upper surface of the bottom plate, and the support extends to two opposite edges of the bottom plate in a horizontal direction. The standing plate is disposed on the upper surface of the bottom plate, extends in a direction in parallel to the horizontal direction, and has an inner wall surface facing the support portion. The inner wall surface, the bottom plate, and the support portion define a trench, in which the trench extends in a direction parallel to the horizontal direction and at least one end of the trench is equipped with an opening. The barrier member is disposed corresponding to the opening to close the opening. The barrier prevents insects from invading the trench to damage the light bar.

Description

Light source device and its liquid crystal display

The invention relates to a light source device of a backlight module, in particular to a light source device that prevents insects from invading and destroying a light bar.

The backlight module generates high heat due to the light bar, and the light bar needs to be attached to a heat sink to increase heat dissipation efficiency. Normally, the heat dissipation plate is cut out after the aluminum extrusion process. There will be a groove-shaped area in the heat dissipation plate, and the light bar is usually arranged on the vertical wall surface in this area.

Due to the limitation of the aluminum extrusion process, the front and back ends of the aforementioned groove-like region cannot be closed by the aluminum extrusion process. The light emitted by the light bar usually causes insects to enter the backlight module, and because the light-emitting diode contains silicon components, insects such as ants will bite and destroy the light-emitting diode.

Therefore, preventing light sources (especially light-emitting diodes) from biting light bars by ants and the like has become a technical problem to be solved.

In view of the above problems, an embodiment of the present invention provides a light source device, which can prevent insects from invading and destroying the light bar.

One or more embodiments of the present invention provide a light source device including a heat sink, a light bar, and a blocking member. The heat sink includes a bottom plate, a vertical plate and a supporting portion; the supporting portion is disposed on a top surface of the bottom plate, and the supporting portion extends to opposite sides of the bottom plate in a horizontal axis direction The vertical plate is arranged on the top surface, extends parallel to the horizontal axis, and has an inner wall surface facing the support portion; wherein, a groove is defined between the inner wall surface, the bottom plate and the support portion, the groove extending direction is parallel to the horizontal direction In the axial direction, at least one end of the slot is an opening, and the bottom plate further has a notch located at the opening of the slot. The light bar is arranged on the inner wall surface; the blocking member is arranged corresponding to the opening to close the opening; and the blocking member further comprises a body and a necking section, the shape of the body matches the cross-sectional shape of the groove, the necking section is connected to the body, and the neck The shortened section is used to insert the gap. Through the setting of the blocking member, the insect is prevented from invading the slot and causing damage to the light bar.

In at least one embodiment, the blocking member is fixed to the bottom plate. In at least another embodiment, the blocking member has a hook, and the bottom plate has a button hole, the hook is combined with the button hole, and the blocking member is fixed to the bottom plate.

In at least yet another embodiment, the blocking member includes a base, the base is connected to the necking section, and the hook extends from the base.

In at least one embodiment, the thickness of the bottom plate adjacent to the notch is less than the thickness of the rest of the bottom plate; the height of the necking section is equal to the thickness of the bottom plate adjacent to the notch; and the thickness of the necking section plus the thickness of the base is equal to the bottom plate The rest of the thickness.

In at least one embodiment, the light source device further includes a back plate, and the blocking member and the bottom plate are fixed to the back plate.

In at least one embodiment, in a direction perpendicular to the bottom plate, the height of the light bar does not exceed the height of the vertical plate.

In at least one embodiment, the length of the light bar projected in the horizontal axis direction is greater than the length of the support portion projected in the horizontal axis direction and less than the length of the riser projected in the horizontal axis direction.

In at least one embodiment, in a direction perpendicular to the bottom plate, the height of the blocking member is equal to or greater than the height of the support portion.

In at least one embodiment, the light source device further includes two positioning members, fixed to the inner wall surface, and respectively abutting the two ends of the light bar. In at least another embodiment, one of the blocking member and the positioning member is integrally formed.

The invention also provides a liquid crystal display, which includes the aforementioned light source device, a plastic frame, a backplane, a display medium and a light guide plate. The plastic frame is combined with the back plate to form an accommodating space, and the bottom plate of the light source device is disposed on the back plate. The display medium and the light guide plate are located in the accommodating space, the light guide plate is located below the display medium, and the support portion is supported by the light guide plate.

In at least one embodiment, the plastic frame has a hollow display window; the edge of the display window has a frame edge that extends horizontally inward, the frame edge extends over the groove and partially overlaps the light guide plate; and the display medium is located on the display Window.

In at least one embodiment, the liquid crystal display further includes a cushion material disposed between the frame edge and the light guide plate.

In the present invention, the light bar is accommodated in the enclosed area through the configuration of the blocking member and the structure of the heat dissipation seat, thereby preventing insects (such as ants) that invade the electronic device from causing insect bite damage to the light bar.

100‧‧‧Light source device

110‧‧‧Cooling seat

112‧‧‧Bottom plate

112a‧‧‧Top

112b‧‧‧button hole

112c‧‧‧Notch

114‧‧‧Standing board

114a‧‧‧Inner wall

116‧‧‧Support

118‧‧‧Trench

120‧‧‧Light bar

122‧‧‧Substrate

124‧‧‧Light source

126‧‧‧Locating parts

130‧‧‧block

132‧‧‧Card hook

134‧‧‧Body

135‧‧‧Fixed Department

136‧‧‧Neckdown

138‧‧‧Base

200‧‧‧LCD

210‧‧‧Backboard

220‧‧‧Light guide plate

230‧‧‧Plastic frame

230a‧‧‧Display window

230b‧‧‧Border

240‧‧‧Display medium

250‧‧‧Material

X‧‧‧horizontal axis

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a partial perspective view of the first embodiment of the present invention, showing a state in which some components are exploded.

3 is a partial perspective view of the first embodiment of the present invention.

4 is a partially exploded perspective view of the first embodiment of the present invention.

5 is a side view of the first embodiment of the present invention.

6 is a schematic cross-sectional view of a liquid crystal display using the light source device in the first embodiment of the present invention.

7 is another schematic cross-sectional view of a liquid crystal display using the light source device in the first embodiment of the present invention.

FIG. 8 is a partial perspective view of a second embodiment of the present invention, showing a state in which some components are exploded.

9 is a side view of the second embodiment of the present invention.

FIG. 10 is a partial perspective view of a third embodiment of the present invention, showing a state in which some components are exploded.

11 and 12 are schematic cross-sectional views of some elements in the third embodiment of the present invention.

FIG. 13 is a partial perspective view of a fourth embodiment of the present invention, showing a state in which some components are exploded.

In the drawings, for the sake of clarity, the widths of some elements, regions, etc. are exaggerated. Throughout the specification, the same reference numerals denote the same elements. It should be understood that when an element such as an element is referred to as being “on” or “connected to” another element, it can be directly on or connected to the other element, or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present.

It should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, or sections, these elements, components, regions, and/or sections do not Should be limited by these terms. These terms are only used to distinguish one element, component, region, or section from another element, component, region, layer, or section. Accordingly, the "first element", "component", "region", or "portion" discussed below may be referred to as the second element, component, region, or portion without departing from the teachings herein.

In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship between one element and another element, as shown. It should be understood that relative terms are intended to include different orientations of the device than those shown in the figures. For example, if the device in one drawing is turned over, the element described as being on the "lower" side of the other element will be oriented on the "upper" side of the other element. Thus, the exemplary term "lower" may include "lower" and "upper" orientations, depending on the particular orientation of the drawings. Similarly, if the device in one of the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "below" or "below" can include an orientation of above and below.

Please refer to FIGS. 1 to 3, which is a light source device 100 disclosed in the first embodiment of the present invention. The light source device 100 includes a heat sink 110, a light bar 120, and two blocking members 130. The light source device 100 is used as a side light source 124 of the liquid crystal display 200, and is particularly provided on a back plate 210 of the liquid crystal display 200, and projects light from the light incident surface of a light guide plate 220 laterally. The back plate 210 includes a bottom shell as a part of the outer shell and a metal piece combined with the bottom shell for strengthening the structure. Both the bottom case and the metal parts are part of the back plate 210. The following description and drawings will not distinguish the difference between the bottom case and the metal parts. Since the heat sink 110 needs to be combined with the back plate 210, the back plate 210 can also be regarded as a part of the light source device 100.

As shown in FIGS. 2, 3 and 4, the heat sink 110 includes a bottom plate 112 and a vertical plate 114. A support portion 116 is provided on a top surface 112a of the bottom plate 112, and the support portion 116 extends to opposite sides of the bottom plate 112 in a horizontal axis direction X to form a retaining wall junction connecting the opposite sides Structure. The support portion 116 may be integrally formed on the bottom plate 112, for example, the support portion 116 may be a convex hull structure formed on the bottom plate 112 by stamping or aluminum extrusion. However, the present invention does not exclude that the support portion 116 is provided as an independent component, and is fixed to the top surface 112a by fixing means such as welding, bonding, and snapping.

As shown in FIGS. 4 and 5, the vertical plate 114 is disposed on the top surface 112 a and has an inner wall surface 114 a facing the support portion 116. The inner wall surface 114a is substantially perpendicular to the top surface 112a, and the vertical plate 114 extends parallel to the horizontal axis direction X. In a specific embodiment, the length of the vertical plate 114 projected in the horizontal axis direction X is greater than the length of the support portion 116 projected in the horizontal axis direction X. The vertical plate 114 may be integrally formed on the bottom plate 112, for example, the vertical plate 114 may be an upright structure formed on the edge of the bottom plate 112 by stamping or aluminum extrusion. However, the present invention does not exclude that the stand plate 114 is provided as an independent component, and is fixed to the top surface 112a by fixing means such as welding, bonding, and snapping, and the position of the stand plate 114 is not limited to be located at the edge of the bottom plate 112.

As shown in FIGS. 4 and 5, a distance is maintained between the inner wall surface 114 a and the support portion 116, and a groove 118 is defined between the inner wall surface 114 a, the bottom plate 112 and the support portion 116. The extending direction of the groove 118 is parallel to the horizontal axis direction X, and both ends of the groove 118 are respectively an opening, and correspond to opposite sides.

As shown in FIGS. 4 and 5, the light bar 120 is provided on the inner wall surface 114a. In a specific embodiment, the height of the light bar 120 does not exceed the height of the vertical plate 114 in a direction perpendicular to the bottom plate 112. The length of the light bar 120 projected in the horizontal axis direction X is greater than the length of the support portion 116 projected in the horizontal axis direction X, but is smaller than the length of the vertical plate 114 projected in the horizontal axis direction X. The light bar 120 includes a substrate 122 and a plurality of light sources 124. The substrate 122 is disposed on the inner wall surface 114a, and the plurality of light sources 124 are disposed on the substrate 122. The thermal energy generated by the plurality of light sources 124 is conducted to the heat sink 110 through the substrate 122. A specific embodiment of the light source 124 is a light emitting diode, using surface assembly technology (surface Mount technology (SMT) is electrically disposed on the substrate 122. The light source device 100 further includes two positioning members 126, fixed to the inner wall surface 114a of the vertical plate 114, and respectively abutting the two ends of the light bar 120, that is, the two ends of the substrate 122, to position the light bar 120.

As shown in FIGS. 1, 2, 3 and 5, the blocking member 130 is disposed on opposite sides of the bottom plate 112 and closes the opening. In the first embodiment, the blocking member 130 and the bottom plate 112 of the heat sink 110 are fixed to the back plate 210 of the liquid crystal display 200, and the position of the blocking member 130 is configured to close the opening of the slot 118, but the blocking member 130 is not excluded It is directly fixed to the bottom plate 112. In the first embodiment, the light source device 100 has two blocking members 130 respectively closing the openings at both ends of the groove 118, but it is not excluded that the light source device 100 has only one blocking member 130 closing the opening at one end and the other end The opening of the part is closed in other ways.

As shown in FIG. 5, in a direction perpendicular to the bottom plate 112, the height of the blocking member 130 is equal to or greater than the height of the support portion 116, and the width of the blocking member 130 is greater than the maximum width of the groove 118, so that the blocking member 130 can The opening is completely shielded in a direction parallel to the bottom plate 112.

As shown in FIG. 6, in the assembled LCD 200, the plastic frame 230 is combined with the back plate 210 to form an accommodating space. Between the plastic frame 230 and the back plate 210 are the display medium 240, the light guide plate 220, and the bottom plate 112, respectively. The display medium 240 includes a liquid crystal display panel and necessary optical films. The light guide plate 220 is located below the display medium 240, and the support portion 116 is supported by the light guide plate 220 so that the light guide plate 220 and the bottom plate 112 maintain a separation distance. The edge of the light guide plate 220 is located on the groove 118, so that the light incident surface corresponds to the light source 124 of the light bar 120 in the horizontal height.

As shown in FIG. 6, the plastic frame 230 has a hollow display window 230a. The edge of the display window 230a has a frame edge 230b extending horizontally inward. The frame edge 230b extends over the groove 118 and partially overlaps the light guide plate 220. The display medium 240 is located in the display window 230a. liquid crystal The display 200 further includes a pad 250 disposed between the frame edge 230b and the light guide plate 220, so that the open area of the groove 118 in the direction perpendicular to the bottom plate 112 is closed by the frame edge 230b, the light guide plate 220, and the pad 250. Therefore, after the plastic frame 230 is combined with the back plate 210, the groove 118 can form a closed area through the combination of the plastic frame 230 and the blocking member 130, so that the light source 124 is located in the closed area, and the light source is protected from insect invasion and damage 124.

Referring to FIG. 6, when the blocking member 130 is made of a soft material and closes the openings at both ends of the groove 118 in a moderately tight manner, the preferred height of the blocking member 130 is equal to the height of the support portion 116, In this way, the blocking member 130 will not contact the side of the light guide plate 220, and a slight displacement of the light guide plate 220 may cause the blocking member 130 to be deformed, which may affect the effect of the blocking element 130 closing the opening.

Referring to FIG. 7, when the blocking member 130 is made of a rigid material, and the height of the blocking member 130 may be greater than the height of the support portion 116, the blocking member 130 appropriately contacts the side of the light guide plate 220 or maintains a small gap, thereby The lateral displacement of the light guide plate 220 is blocked (that is, the displacement parallel to the horizontal axis direction X). Therefore, when the blocking member 130 is made of a rigid material, the blocking member 130 can also be used to position the light guide plate 220.

As shown in FIGS. 8 and 9, a light source device 100 disclosed in the second embodiment of the present invention includes a heat sink 110, a light bar 120 and two blocking members 130 (only one is shown in the figure). In the second embodiment, the shape of the blocking member 130 matches the cross-sectional shape of the groove 118, and the blocking member 130 is elastically deformable. The blocking member 130 is tightly fitted into the groove 118 and is provided corresponding to both ends of the groove 118 to close the opening of the groove 118.

As shown in FIGS. 10 and 11, a light source device 100 disclosed in the third embodiment of the present invention includes a heat sink 110, a light bar 120, and two blocking members 130 Show one). In the third embodiment, the shape of the blocking member 130 matches the cross-sectional shape of the groove 118. The blocking member 130 has a hook 132, and the bottom plate 112 has a button hole 112 b, and the button hole 112 b is located at the opening of the slot 118. The hook 132 is used for being coupled to the button hole 112b, fixing the blocking member 130 to the bottom plate 112, and closing the opening of the end of the groove 118 by the blocking member 130.

Referring to FIGS. 10, 11 and 12, each blocking member 130 includes a body 134, a necked-down section 136, a base 138 and a hook 132. The bottom plate 112 further has a notch 112c at the opening of the slot 118, and the width of the notch 112c is smaller than the width of the bottom of the slot 118. The shape of the body 134 matches the cross-sectional shape of the groove 118. The necking section 136 is connected to the body 134, and the width of the necking section 136 matches the width of the notch 112c to fit into the notch 112c. The base 138 is connected to the necking section 136, and the width of the base 138 is larger than the width of the notch 112c. Moreover, the thickness of the bottom plate 112 adjacent to the portion of the notch 112c is smaller than the thickness of the remaining portion of the bottom plate 112. In a specific embodiment, the height of the necking section 136 is equal to the thickness of the bottom plate 112 adjacent to the notch 112c; the thickness of the necking section 136 plus the thickness of the base 138 is equal to the thickness of the rest of the bottom plate 112, so that the bottom plate 112 can be flat It is placed on the back plate 210 without being skewed by the configuration of the blocking member 130. The hook 132 extends horizontally from the base 138, and is used to buckle into the buckle hole 112 b from the bottom surface of the bottom plate 112. In FIGS. 11 and 12, the partial bottom plate 112 on the left side is the rest of the bottom plate 112, and is not limited to the bottom of the groove 118. As long as the bottom plate 112 is away from the notch 112c, it is shown in FIGS. 11 and 12. The part to be represented by the partial bottom plate 112 on the left.

As shown in FIG. 13, a light source device 100 disclosed in the fourth embodiment of the present invention includes a heat sink 110, a light bar 120, and two blocking members 130 (only one is shown in the figure).

Referring to FIG. 13, each blocking member 130 includes a body 134 and a fixing portion 135 respectively. The body 134 and the fixing portion 135 are integrally formed. In the fourth embodiment, the body 134 As in the first embodiment, the blocking member 130 is disposed on the back plate 210; in a direction perpendicular to the bottom plate 112, the height of the body 134 is equal to or greater than the height of the support portion 116, and the width of the body 134 is greater than The maximum width of the slot 118 allows the body 134 to completely cover the opening of the slot 118 in a direction parallel to the bottom plate 112. The fixing portion 135 extends from the body 134, and the extending direction of the fixing portion 135 is substantially parallel to the horizontal axis direction X. The fixing portion 135 is used to be fixed to the vertical plate 114 so that the blocking member 130 is disposed on the back plate 210 and closes the opening of the groove 118. When the blocking member 130 is made of a rigid material, the fixing portion 135 can serve as the positioning member 126 of the light bar 120. In other words, in the fourth embodiment, the blocking member 130 and the positioning member 126 are integrally formed.

In the present invention, through the configuration of the blocking member 130 and the structure of the heat dissipation base 110, the light bar 120 is accommodated in a closed area, so as to prevent insects (such as ants) invading the electronic device from causing insect bite damage to the light bar 120.

Although the technical content of the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this art and makes some changes and retouching without departing from the spirit of the present invention should be covered in the present invention. The scope of protection of the present invention shall be subject to the scope of the attached patent application.

100‧‧‧Light source device

110‧‧‧Cooling seat

118‧‧‧Trench

120‧‧‧Light bar

126‧‧‧Locating parts

130‧‧‧block

210‧‧‧Backboard

Claims (11)

A light source device includes: a heat sink including a bottom plate, a vertical plate and a support portion; the support portion is disposed on a top surface of the bottom plate, and the support portion extends in a horizontal axis direction to opposite two of the bottom plate Side; the upright plate is disposed on the top surface, extends parallel to the horizontal axis, and has an inner wall surface facing the support portion; wherein, a groove is defined between the inner wall surface, the bottom plate, and the support portion , The extending direction of the groove is parallel to the horizontal axis direction, and at least one end of the groove is an opening, and the bottom plate further has a notch located at the opening of the groove; a light bar is provided on the inner wall surface ; And at least one blocking element, fixed to the bottom plate, the blocking element corresponding to the opening is provided to close the opening; the blocking element has a hook, and the bottom plate has a buckle hole, the hook is used to combine with the The button hole fixes the blocking member to the bottom plate, and the blocking member further includes a body, a necking section, and a base. The shape of the body matches the cross-sectional shape of the groove, and the necking section is connected to the body. The necking section is used for embedding the notch, the base is connected to the necking section, and the hook extends from the base. The light source device according to claim 1, wherein the thickness of the bottom plate adjacent to the notched portion is smaller than the thickness of the remaining portion of the bottom plate; the height of the necking section is equal to the thickness of the bottom plate adjacent to the notched portion; and the neck The thickness of the constricted section plus the thickness of the base is equal to the thickness of the rest of the bottom plate. The light source device according to claim 1, further comprising a back plate, the blocking member and the bottom plate are fixed to the back plate. The light source device according to claim 1, wherein the inner wall surface is perpendicular to the top surface. The light source device according to claim 1, wherein the length of the light bar projected in the horizontal axis direction is greater than the length of the support portion projected in the horizontal axis direction, and is smaller than the length of the vertical plate projected in the horizontal axis direction length. The light source device according to claim 1, wherein the height of the blocking member is equal to or greater than the height of the supporting portion in a direction perpendicular to the bottom plate. The light source device according to claim 1, further comprising two positioning members, fixed to the inner wall surface, and respectively abutting the two ends of the light bar. The light source device according to claim 7, wherein one of the blocking member and the positioning member is integrally formed. A liquid crystal display, comprising: the light source device according to any one of claim 1 to claim 8; a plastic frame; a back plate, wherein the plastic frame is combined with the back plate to form a receiving space, and the light source device The bottom plate is disposed on the back plate; and a display medium and a light guide plate are located in the accommodating space, the light guide plate is located under the display medium, and the support portion is supported by the light guide plate. The liquid crystal display according to claim 9, wherein: the plastic frame has a hollow display window; the edge of the display window has a frame edge extending horizontally inwards, the frame edge extends to the groove and partially overlaps the A light guide plate; and the display medium is located in the display window. The liquid crystal display according to claim 10, further comprising a cushion material disposed between the frame edge and the light guide plate.

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