CN100368894C - Protection structure of light source - Google Patents

Abstract

The invention relates to a light source protection structure, wherein two sides of a reflector are respectively convexly provided with a salient point, the salient points are adjacent to an opening of the reflector and are inwards protruded out of an accommodating space of the reflector, and the salient points are respectively correspondingly positioned on non-light-emitting electrode regions at two ends of a light source. Therefore, the salient points do not affect the light source of the light source, the product brightness of the backlight module can be maintained, and in the impact test process of the backlight module, the salient points can effectively block the movement of the light guide plate, so that the problem of impacting the light source caused by the movement of the light guide plate can be avoided. Similarly, two sides of the lamp cover of the backlight module are respectively bent upwards to form a blocking piece, the blocking piece is positioned between the opening of the reflector and the light guide plate, and the blocking piece can also block the movement of the light guide plate to achieve the effect.

Description

Light source protection structure

field of invention

The present invention relates to a protection structure of a light source, in particular to a protection structure suitable for preventing a light guide plate from colliding with a light source, such as a liquid crystal display and the like.

technical background

Liquid crystal display (LCD) is a display that does not emit light by itself, but can only produce display functions through an external light source, such as a light source, and the backlight module formed by it plays the role of light source in the liquid crystal display. One of the most important key components of the display.

In addition, general precision electronic products need to undergo basic testing before they go on the market to ensure that the products are of acceptable quality and protect the rights of consumers. The backlight module is no exception. Major manufacturers also have a complete set of quality control and service systems for backlight modules, so as to strictly implement the quality management and control of backlight modules. Especially in the current environment of fierce market competition, various manufacturers set up strict testing standards to demonstrate the reliability of their product quality and win the recognition of the market, such as the so-called reliability testing.

Please also refer to the three-dimensional exploded view of the existing backlight module in FIG. 1 and the sectional view of the protection structure of the existing light source in FIG. 92, prism sheet 93, diffusion sheet 94 etc., then assemble a reflector 95 and a lamp cover 96 at the side edge 911 of lower casing plate 91 simultaneously, and be provided with a light source 97 in reflector 95, this light source is a light tube.

When the above-mentioned backlight module 9 is subjected to the so-called reliability test, the backlight module 9 is bumped in the direction of a fixed angle, such as the -Y direction. At the same time, it is checked whether a specific point on the backlight module 9 is cracked. , when impacted, the light guide plate 92 in the backlight module 9 will produce a sliding action, and the light guide plate 92 will hit the light source 97 due to the sliding action, causing the light source 97 to break and affect its light emission, thereby causing the overall backlight module 9 Luminance, ie the apparent brightness of the overall backlight module 9 is affected.

It can be seen from FIG. 2 that traditionally, in order to prevent the light guide plate 92 from colliding with the light source 97, a flap 951 is bent downward on both sides of the reflector 95, and the flaps 951 on both sides are located on the non-luminous sides of the light source 97. In the electrode area 971 , and the two folded pieces 951 can form the blocking effect of the light guide plate 92 and will not affect the light emission of the light source 97 .

However, the material of the reflector 95 is generally a thin metal sheet, so even if the folded sheet 951 is bent downward, the impact force is not enough to prevent the light guide plate 92 from sliding. In addition, the practice of cutting the reflector 95 and bending the flap 951 downward will also cause the problem of stress concentration and affect the strength of the overall reflector 95, and the light source of the light source 97 will also pass through the cut. Outward divergence, causing optical anomalies.

In addition, the method of cutting the reflector 95 and bending the folded piece 951 downward will not only cause burrs on the folded piece 951, but also be difficult to manufacture, which is not very ideal.

In addition to the above method, there is also a method of directly sticking adhesive tape on the light guide plate 92 to prevent the light guide plate 92 from slipping and hitting the light source 97. However, the adhesive force of the adhesive tape is not enough for the so-called reliability test.

In addition, there are grooves cut directly on both sides of the light guide plate 92, and the lower shell plate 91 is used as a barrier, but this method requires additional design of the shape of the light guide plate 92, and may easily cause optical anomalies.

Contents of the invention

The protective structure of the light source of the present invention is used with a backlight module, and the backlight module includes a light guide plate and a light source.

In addition, the protective structure of the light source of the present invention includes a reflector, and the reflector has an accommodating space, an opening, and a protruding point.

In addition, the light source is accommodated in the accommodating space of the reflector and emits light toward the opening side, and the light guide plate is correspondingly adjacent to the opening of the reflector.

In the above structure, the protruding point is adjacent to the opening of the reflector and protrudes inwardly out of the accommodation space. When the backlight module is subjected to vibration, the protruding point can limit the movement of the light guide plate and prevent the light guide plate from colliding with the light source.

It can be seen from the above that when the so-called reliability test is performed on the bumps of the reflector, during the impact test of the backlight module, the bumps of the reflector can effectively block the movement of the light guide plate, thereby avoiding the damage caused by the movement of the light guide plate. Issues with hitting light sources.

The above-mentioned light source can be a lamp tube, and its two ends can respectively include a non-luminescent electrode area, and the position of the bump of the reflector can correspond to the non-luminescent electrode area, so the bump will not affect the light source, that is, it can maintain The brightness of the backlight module product.

The bumps of the above-mentioned reflector can be formed by mechanical forming, preferably by stamping, and the shape of the bumps can be elliptical bumps, or circular, square bumps and the like. As for the aforementioned reflector, it can be formed by bending a reflective sheet, for example, by bending a metal sheet, preferably by bending an aluminum sheet.

In addition, the above-mentioned backlight module may include a prism sheet and a diffusion sheet, and the prism sheet and the diffusion sheet may be respectively laminated above the light guide plate. Of course, the backlight module may also be laminated with glass and the like.

In addition, another form of the protective structure of the light source of the present invention is used with a backlight module, and the backlight module includes a light guide plate and a light source.

In addition, the protective structure of the light source of the present invention includes a lamp cover and a reflector, wherein the lamp cover has a baffle formed on the lamp cover, and the reflector is arranged on the lamp cover, and the reflector has a accommodating space, and an opening.

In addition, the light source is accommodated in the accommodating space of the reflector and emits light toward the opening side, and the light guide plate is correspondingly adjacent to the opening of the reflector.

In the above structure, the blocking piece protrudes between the light source and the light guide plate. When the backlight module is subjected to vibration, the blocking piece can limit the movement of the light guiding plate and prevent the light guiding plate from colliding with the light source.

Similarly, it can be seen from the above structure that when the so-called reliability test is performed on the stopper of the lamp cover, the stopper of the lamp cover can effectively block the movement of the light guide plate during the impact test of the backlight module, thereby avoiding the impact caused by the light guide plate. The movement of the light board caused the problem of hitting the light source.

The above-mentioned light source can be a lamp tube, and its two ends can respectively include a non-luminous electrode area, and the position of the baffle can correspond to the non-luminous electrode area, so the light source will not be affected, and the brightness of the backlight module product can also be maintained. .

An opening can be provided on the reflector, and the baffle of the lamp cover can pass through the opening and protrude between the light source and the light guide plate. The aforementioned reflector can also include an extension plate, which is stacked on the lamp cover, and the aforementioned opening can be opened on the extension plate.

In addition, the shape of the baffle of the above-mentioned lamp cover can be a semicircle, or it can be triangular, square, semi-elliptical, trapezoidal, or other shapes, etc., and the cross-sectional shape of the baffle of the lamp cover can be an L shape, Or oblique, semicircular, triangular, or other shapes.

In addition, the reflector can be formed by bending a reflective sheet, for example, by bending a metal sheet, preferably by bending an aluminum sheet.

In addition, the backlight module may also include a prism sheet and a diffusion sheet, and the prism sheet and the diffusion sheet are respectively stacked above the light guide plate. Of course, the backlight module may also be stacked with glass and the like.

Brief description of the drawings

FIG. 1 is an exploded perspective view of an existing backlight module;

2 is a cross-sectional view of a protective structure of an existing light source;

Fig. 3 is the three-dimensional exploded view of the first preferred embodiment of the present invention;

4 is a partial enlarged schematic view of the first preferred embodiment of the present invention;

Fig. 5 is the sectional view of the first preferred embodiment of the present invention;

6 is a partial enlarged schematic view of a second preferred embodiment of the present invention;

7 is a partially enlarged schematic view of a third preferred embodiment of the present invention;

Fig. 8 is a three-dimensional exploded view of a fourth preferred embodiment of the present invention;

Fig. 9 is a partially enlarged schematic view of a fourth preferred embodiment of the present invention;

Figure 10 is a sectional view of a fourth preferred embodiment of the present invention;

Fig. 11 is a partially enlarged schematic diagram of a fifth preferred embodiment of the present invention;

Fig. 12 is a partially enlarged schematic view of a sixth preferred embodiment of the present invention;

Fig. 13 is a partial enlarged schematic view of the seventh preferred embodiment of the present invention;

Fig. 14 is a partial enlarged schematic view of the eighth preferred embodiment of the present invention;

Fig. 15 is a sectional view of the ninth preferred embodiment of the present invention;

Fig. 16 is a sectional view of the tenth preferred embodiment of the present invention;

Fig. 17 is a sectional view of an eleventh preferred embodiment of the present invention.

Detailed ways

Please refer to Fig. 3 at the same time, which is a three-dimensional exploded view of the first preferred embodiment of the present invention, Fig. 4 is a partially enlarged schematic diagram of the first preferred embodiment of the present invention, and Fig. 5 is a cross-sectional view of the first preferred embodiment of the present invention, wherein There is a backlight module 1, and this backlight module 1 includes a lower shell plate 11, a light guide plate 12, a reflector 13, a light source 14, a prism sheet 15, and a diffusion sheet 16, wherein the light guide plate 12, The prism sheet 15 and the diffuser sheet 16 are respectively stacked above the lower casing 11 , and the reflector 13 is arranged on one side edge of the lower casing 11 . Of course, the so-called backlight module 1 will also be laminated with other components such as glass (not shown in the figure).

In addition, the reflector 13 is surrounded by an accommodating space 131 and an opening 132 . The opening 132 therein faces to the lower shell 11 , and in this embodiment, the reflector 13 is formed by bending an aluminum reflector. The light source 14 is accommodated in the accommodation space 131 of the reflector 13, and the two ends of the light source 14 respectively include a non-light-emitting electrode area 141, which can be connected with wires to generate a light source. In this embodiment, the light source 14 is one light tube.

In addition, the light guide plate 12 in the figure corresponds to the opening 132 adjacent to the reflector 13 and the light source 14 in the accommodating space 131 of the reflector 13, and a convex point is respectively protruded on both sides of a long axis of the reflector 13 of the reflector 13. 133. In this embodiment, the bumps 133 are respectively formed by stamping, and the shapes of the bumps 133 are respectively oval bumps. At the same time, the bumps 133 on both sides of the reflector 13 are adjacent to the sides of the reflector 13. The opening 132 protrudes inward from the accommodating space 131 of the reflector 13 , and the bumps 133 on both sides of the reflector 13 correspond to the non-light-emitting electrode regions 141 located at two ends of the light source 14 .

Therefore, it can be seen from the above structure that the bumps 133 on both sides of the reflector 13 are respectively located at the non-light-emitting electrode regions 141 at both ends of the light source 14, so the light source produced by the light source 14 will not be affected, that is, the light source 14 can maintain its irradiating function and can Maintain the product luminance of the backlight module 1, and during the so-called reliability test, during the impact test of the backlight module 1, the bumps 133 on both sides of the reflector 13 can effectively block the movement of the light guide plate 12, and avoid The problem of hitting the light source 14 is caused by the movement of the light guide plate 12 .

Please refer to Fig. 6, which is a partially enlarged schematic diagram of the second preferred embodiment of the present invention, wherein the shapes of the bumps 134 are respectively shown as circles; please refer to Fig. 7, which is a partially enlarged schematic diagram of the third preferred embodiment of the present invention The schematic diagram shows that the shapes of the bumps 135 are square. It can be seen that the shape of the bumps is not subject to any limitation, but can be any shape.

Please also refer to Fig. 8, which is a three-dimensional exploded view of the fourth preferred embodiment of the present invention, Fig. 9 is a partially enlarged schematic view of the fourth preferred embodiment of the present invention, and Fig. 10 is a cross-sectional view of the fourth preferred embodiment of the present invention, A backlight module 2 is shown therein, and the backlight module 2 includes a lower shell 21, a light guide plate 22, a reflector 23, a light source 24, a lamp cover 25, a prism sheet 26, and a diffusion sheet 27 , wherein the light guide plate 22 , the prism sheet 26 , and the diffuser sheet 27 are respectively stacked above the lower casing 21 , and the lamp cover 25 is disposed on one side edge 211 of the lower casing 21 . Of course, the so-called backlight module 2 will also be laminated with other elements such as glass (not shown in the figure).

In addition, the reflector 23 in the figure is stacked on the lamp cover 25 , and the reflector 23 is surrounded by an accommodating space 231 and an opening 232 , and the opening 232 faces the lower shell 21 . In this embodiment, the reflector 23 is formed by bending an aluminum reflector, and the reflector 23 extends outwards with an extension plate 234, and the extension plate 234 is stacked on the lamp cover 25. At the same time, the Two openings 233 are respectively defined on two sides of the extension plate 234 , and are respectively adjacent to the openings 232 of the reflector 23 .

In addition, the light source 24 is accommodated in the accommodation space 231 of the reflector 23, and the two ends of the light source 24 respectively include a non-light-emitting electrode area 241, which can be connected with wires to generate the light source. In this embodiment, the light source 24 is a light tube. The light guide plate 22 corresponds to the opening 232 adjacent to the reflector 23 and the light source 24 in the accommodating space 231 of the reflector 23 .

Please note that on both sides of the lamp cover 25 there are respectively upwardly bent blocking pieces 251 , which respectively pass through the openings 233 formed on both sides of the extension plate 234 of the reflector 23 . In this embodiment, the baffles 251 on both sides of the lamp cover 25 are semicircular, and their cross-sectional shapes are respectively L-shaped. The non-light-emitting electrode region 241 at the end protrudes upward and is located between the opening 232 of the reflector 23 and the light guide plate 22 .

Therefore, the method of protruding upward on both sides of the lamp cover 25 to arrange a blocking plate 251 and making them respectively located in the non-light-emitting electrode regions 241 at both ends of the light source 24 will not affect the light source generated by the light source 24, that is, the backlight can be maintained. The luminance of the product of the module 2, and during the so-called reliability test, during the impact test of the backlight module 2, the baffles 251 on both sides of the lamp cover 25 can effectively block the movement of the light guide plate 22, thereby avoiding the The movement of the light panel 22 creates a problem of hitting the light source 24 .

Please refer to Fig. 11, which is a partially enlarged schematic diagram of the fifth preferred embodiment of the present invention, wherein the shapes of the blocking pieces 252 are respectively triangular; please refer to Fig. 12, which is a partially enlarged schematic diagram of the sixth preferred embodiment of the present invention , wherein the shapes of the baffles 253 are respectively square; please refer to FIG. 13 , which is a partially enlarged schematic diagram of the seventh preferred embodiment of the present invention, wherein the shapes of the baffles 254 are shown as semi-elliptical; please refer to FIG. 14 , This figure is a partially enlarged schematic view of the eighth preferred embodiment of the present invention, wherein the shapes of the blocking pieces 255 are respectively trapezoidal. It can be seen that the shape of the baffle is not subject to any limitation, but can be any shape.

Please refer to Fig. 15, which is a cross-sectional view of the ninth preferred embodiment of the present invention, wherein the cross-sectional shapes of the baffles 256 are shown obliquely outwards and upwards respectively; please refer to Fig. 16, which is a sectional view of the tenth preferred embodiment of the present invention The sectional view shows that the sectional shapes of the baffles 257 are semicircular; please refer to FIG. 17 , which is a sectional view of the eleventh preferred embodiment of the present invention, which shows that the sectional shapes of the baffles 258 are triangular. It can be seen from this that the cross-sectional shape of the baffle is not subject to any limitation, but can be any shape.

The above-mentioned embodiments are only examples for convenience of description, and the scope of rights claimed by the present invention should of course be based on the scope described in the claims, rather than being limited to the above-mentioned embodiments.

Claims (14)

1. A light source protection structure used with a backlight module, the backlight module includes a light guide plate and a light source, the light source protection structure includes: A reflector, the reflector has an accommodating space, an opening, and a raised point; Wherein, the light source is accommodated in the accommodating space and emits light toward the opening side, the light guide plate is correspondingly adjacent to the opening, the protruding point is adjacent to the opening and protrudes inwardly out of the accommodating space, when When the backlight module is subjected to vibration, the bump can limit the movement of the light guide plate, thereby preventing the light guide plate from colliding with the light source; Wherein, the light source is a lamp tube, the two ends of the light source respectively include a non-luminescent electrode area, and the position of the bump corresponds to the non-luminescent electrode area. 2. The light source protection structure as claimed in claim 1, wherein the bumps of the reflector are formed by stamping. 3. The light source protection structure as claimed in claim 1, wherein the bumps of the reflector are elliptical bumps. 4. The light source protection structure as claimed in claim 1, wherein the reflector is formed by bending a reflective sheet. 5. The light source protection structure as claimed in claim 4, wherein the reflective sheet is an aluminum sheet. 6 . The light source protection structure according to claim 1 , wherein the backlight module further comprises a prism sheet and a diffusion sheet, and the prism sheet and the diffusion sheet are laminated on the light guide plate respectively. 7. A light source protection structure used with a backlight module, the backlight module includes a light guide plate and a light source, the light source protection structure includes: a lamp cover having a flap formed over the lamp cover; and A reflector is arranged on the lamp cover, and the reflector has an accommodating space and an opening; Wherein, the light source is accommodated in the accommodating space of the reflector, and emits light toward the opening side, and the light guide plate is correspondingly adjacent to the opening of the reflector, and the blocking piece protrudes between the light source and the light guide plate Between, when the backlight module is subjected to vibration, the baffle can limit the movement of the light guide plate, so as to prevent the light guide plate from colliding with the light source; Wherein, the light source is a lamp tube, the two ends of the light source respectively include a non-luminescent electrode area, and the position of the blocking piece corresponds to the non-luminous electrode area. 8 . The light source protection structure as claimed in claim 7 , wherein an opening is defined in the reflector, and the blocking piece of the lamp cover passes through the opening and protrudes between the light source and the light guide plate. 9. The light source protection structure as claimed in claim 8, wherein the reflector further comprises an extension plate stacked on the lamp cover, and the opening is opened on the extension plate. 10. The light source protection structure as claimed in claim 7, wherein the blocking piece of the lamp cover is semicircular. 11. The light source protection structure according to claim 7, wherein the cross-sectional shape of the blocking plate of the lamp cover is L-shaped. 12. The protective structure for light sources as claimed in claim 7, wherein the reflector is formed by bending a reflective sheet. 13. The light protection structure as claimed in claim 12, wherein the reflective sheet is an aluminum sheet. 14. The light source protection structure according to claim 7, wherein the backlight module further comprises a prism sheet and a diffusion sheet, and the prism sheet and the diffusion sheet are stacked on the light guide plate respectively.

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