CN100529909C - Replaceable lamp tube module for liquid crystal display device - Google Patents

Abstract

The invention discloses a lamp tube module for a liquid crystal display device, which comprises a lamp tube and a reflecting device. The reflector longitudinally encloses at least one side of the lamp tube and has a removal mechanism at one end for facilitating removal of the lamp tube module. When the lamp tube module is assembled on the liquid crystal display device, the disassembling mechanism is exposed for disassembling.

Description

Replaceable lamp module for liquid crystal display device

technical field

The invention relates to a replaceable lamp tube module for a liquid crystal display device, in particular to a replaceable lamp tube module with a detachment mechanism for a liquid crystal display device.

Background technique

Backlight Module (Backlight Module) is an optical component that provides liquid crystal display (Liquid Crystal Display, LCD) products as the back light source. It is mainly composed of light source, light guide plate, optical film, plastic frame and so on. At present, there are mainly three types of backlights: Electro Luminescence (EL), Cold Cathode Fluorescent Lamp (CCFL) and Light Emitting Diode (LED).

As far as the scope of application is concerned, cold light sheets and light emitting diodes are mainly used for small-sized, monochromatic (green, red) liquid crystal displays. Recently, white light (full-color) cold light film and light-emitting diode backlight products have also appeared one after another. However, due to its relatively dark brightness, it is basically used for small-sized liquid crystal displays below 4 inches, such as: mobile phones, personal digital assistants (PDAs), game consoles, etc. As for the full-color (white light), large-size brightness backlight, the current mainstream is still to use cold-cathode fluorescent lamps as light sources, and after years of technological development, cold-cathode fluorescent lamps have mature technology, high reliability, and stable performance.

For example, US Patent No. 5,815,227 discloses a backlight device for a liquid crystal display. It includes a light guide plate (Light Inducing Plate) located on the bottom of the LCD, a lamp tube (Lamp) located at one end of the light guide plate, and a lamp cover (Lamp Cover) that reflects the light of the lamp tube to the light guide plate. Wherein, the lamp tube and the lampshade together form a lamp module, which can be fixed on the light guide plate or disassembled from the light guide plate through a locking mechanism. The locking mechanism includes two pairs of locking projections (Locking Protmsions) and two pairs of locking holes (Locking Holes), wherein the locking projections are respectively arranged on the upper and lower surfaces of the light guide plate, and the locking holes are respectively Set on the corresponding part of the lampshade. When replacing the lamp module, the two pairs of locking projections and locking holes should be fastened correspondingly at the same time, so as to realize the fixing of the lamp module.

US Patent No. 5,280,372 discloses another backlight device for a compact liquid crystal display device. The backlight device (Back Light Device) includes a Light Transmitting Plate (Light Transmitting Plate) arranged parallel to the Liquid Crystal Element (Liquid Crystal Element), a light source (Light Source) set close to the Light Transmission Plate, and a light source (Light Source) that reflects the light emitted by the light source to the A reflector (Reflector) of the light transmission plate and a bracket (Frame) for supporting the backlight device. The light source adopts cold cathode fluorescent tube (Cold Cathode Tube, CCFT), and the light source obtains the required electric energy through the corresponding light source wire (Lead Wire) and electrical connector (Connector).

Among them, the light source and the reflector form a side-drawing type light tube module (Light Source Unit). The backlight device has a slide mechanism (Slide Mechanism), which includes a guide rail (Guide Rail) arranged at one end of the bracket. One end of the guide rail is open so that the reflector can slide along it. In this way, when the cold cathode fluorescent lamp fails or cannot emit light normally due to aging, the lamp module is disassembled through the sliding mechanism, and after a good cold cathode fluorescent lamp is replaced, the replaced lamp module is put back into the backlight device.

However, in the process of replacing the replaceable lamp module of the prior art, the operator easily pulls the lamp source wire, which damages the solder joints of the lamp tube, resulting in failure of the high-voltage test (Hi-Pot Test) or jumping of the lamp source wire Fire (Lamp Cable Burnout) caused customer complaints, and even industrial safety incidents.

Therefore, it is necessary to design a lamp module, which can prevent the lamp source cable from being pulled during the replacement process, resulting in failure of the high-voltage test (Hi-Pot Test) or lamp cable burnout. .

Contents of the invention

The object of the present invention is to provide a replaceable lamp module for LCD display device, which has a detachment mechanism for convenient replacement of the lamp module, so that the lamp can be avoided during the replacement of the lamp module. The power line is pulled and causes the high-voltage test (Hi-Pot Test) or the light source line flashover (LampCable Burnout) phenomenon.

In order to achieve the above object, the lamp module for LCD display device of the present invention includes a lamp and a reflector. The reflecting device encloses at least one side of the lamp tube in the longitudinal direction, and is provided with a detachment mechanism at one end thereof for conveniently detaching the lamp tube module. When the lamp module is assembled on the LCD display device, the disassembly mechanism is exposed for disassembly.

The reflector includes first, second and third sides connected together in sequence, the first and third sides are parallel to each other, the first, second and third sides of the reflector enclose the lamp in a non-enclosed manner Tube. The dismounting mechanism for conveniently dismounting the lamp module of the present invention is provided on one end of the first side.

The dismounting device is a concave structure, a perforated structure or a convex structure that can be fastened by fingers or tools.

The two ends of the lamp tube of the lamp tube module are respectively provided with first and second cushions which play a fixed role and have certain elasticity, and one end of the lamp tube is wrapped by the first cushion, and the other end of the lamp tube is close to the dismounting mechanism. At one end, the lamp tube passes through the second cushion; and the reflector also wraps the first and second cushions sideways.

In a preferred embodiment of the present invention, the first side of the reflecting device extends outwardly from the second side longer than the third side extends outwardly from the second side. The reflector is actually a reflector. In addition, the light tube module of the present invention also includes a light source wire electrically connected to the light tube, one end of which is electrically connected to the end of the light tube away from the dismantling mechanism, and the other end is bent over and runs from the same direction as the end of the light tube close to the dismantling mechanism. Extend outward.

The invention utilizes the detachment mechanism design on the reflector of the lamp tube for easy extraction, so that the lamp source line can be avoided from being pulled during the replacement process, and the operation of taking out the lamp tube module can be successfully completed. Therefore, adopting the design of the present invention has the following advantages: the corresponding replacement operation can be conveniently performed without increasing the existing space for replacing the lamp module; Line jump (Lamp Cable Burnout) risk; and without any additional attachment parts.

Description of drawings

FIG. 1 is a three-dimensional schematic diagram of the overall structure of a replaceable lamp module used in an LCD display device according to the present invention;

Figure 2 is an enlarged schematic view of area A in Figure 1;

FIG. 3 is a schematic diagram of a combined structure of a replaceable lamp module used in an LCD display device of the present invention mounted on a liquid crystal display device;

FIG. 4 is an enlarged schematic view of area B in FIG. 3 .

Description of main component symbols

1 Lamp module 2LCD display device

10 Reflecting device 11 Disassembly mechanism

12 light tubes 13 light source lines

15 first side 16 second side

17 third side 20 back panel

21 The first cushion 22 The second cushion

24 openings 26 electrical connectors

Detailed ways

The detailed description and technical content of the replaceable lamp module used in the liquid crystal display device of the present invention are now described as follows in conjunction with the accompanying drawings:

Please refer to FIG. 1 and FIG. 2 , FIG. 1 is a lamp module 1 according to an embodiment of the present invention, and FIG. 2 is an enlarged view of area A in FIG. 1 . The light tube module 1 used in the LCD display device in this embodiment includes a reflector 10 , a light tube 12 , a light source line 13 and an electrical connector 26 . The reflector 10 encloses at least one side of the lamp tube 12 in the longitudinal direction, and is provided with a detachment mechanism 11 at one end thereof for conveniently detaching the lamp tube module 1 . One end of the light source wire 13 is electrically connected to the end of the lamp tube 12 away from the disassembly mechanism 11, and the other end is bent and extends outward in the same direction as the end of the lamp tube 12 close to the disassembly mechanism 11 to pass through an electrical connector 26 Connect to power supply (not shown).

The reflector 10 includes a first side 15, a second side 16 and a third side 17 connected together in sequence, the first and the third side 15, 17 can be parallel to each other, and the first and the third side 15, 17 can be perpendicular to the third side. Two sides 16 are set. The first, second and third sides 15, 16, 17 of the reflector 10 form a groove for enclosing the lamp tube 12 in a non-enclosed manner. The detachment mechanism 11 of the present invention is disposed on one end of the first side 15 extending in the longitudinal direction.

Please refer to FIG. 3 and FIG. 4 together. FIG. 3 is a schematic diagram of the combined structure of the lamp module 1 in FIG. 1 installed on the backplane 20 of the LCD display device 2 . FIG. 4 is an enlarged view of area B in FIG. 3 . Since the side of the LCD display device 2 corresponding to the dismounting mechanism 11 is an opening 24, when the lamp module 1 is assembled on the back plate 20 of the LCD display device 2, the lamp module 1 is put into the back panel through the opening 24. within board 20. When the lamp module 1 is fixed on the backboard 20 , the detachment mechanism 11 is exposed out of the backboard 20 . In this way, when the user wants to detach the lamp module 1 from the back panel 20 of the LCD display device 2, the detachment mechanism 11 can be used as a force application point, and force is applied along the direction C shown in FIG. 3 to remove the lamp module 1 from The opening 24 of the back plate 20 is disengaged.

The dismounting mechanism 11 is a concave structure, a perforated structure or a convex structure that can be buckled by fingers or tools. In a preferred embodiment of the present invention, the detachment mechanism 11 is a perforated structure (as shown in the second figure).

The two ends of the lamp tube 12 of the lamp tube module 1 are respectively provided with first and second cushions 21 and 22 which are fixed and have a certain degree of elasticity, and one end of the lamp tube 12 is wrapped by the first cushion 21, while the second The cushion 22 covers the other end of the lamp tube 12 close to the detachment mechanism 11 and the lamp source wire 13 .

In a preferred embodiment of the present invention, the length of the first side 15 extending outward from the second side 16 of the reflection device 10 is greater than the length of the third side 17 extending outward from the second side 16 . The length of the first side 15 extending outward from the second side 16 may be equal to or slightly shorter than the height of the corresponding side of the second cushion 22 . The reflector 10 is actually a reflector (Lamp Reflector), which is used to reflect the light emitted from the lamp tube 12 . The first, second and third sides 15, 16, 17 may be of laminar structure.

As shown in Fig. 3 and Fig. 4, when the lamp tube 12 breaks down or is aging, in the process of replacing the lamp tube module, it is only necessary to use fingers or tools to act on the dismounting mechanism 11 (such as the dismounting hole structure), and the lamp tube module 1 Pull out the light source cord 13 without pulling it, and then continue the operation of replacing the damaged or aging light tube.

The easy-to-extract disassembly mechanism 11 designed on the lamp reflector 10 can be a square hole, a round hole, a convex structure, etc. In the preferred embodiment shown in Figures 1 to 4, the disassembly mechanism 11 is a square hole , which can be called a disassembly hole (Decomposition Hole), which can be used as a point of force for the fingers during the swapping action.

The invention utilizes the detachment mechanism design on the reflector of the lamp tube for easy extraction, so that the lamp source line can be avoided from being pulled during the replacement process, and the operation of taking out the lamp tube module can be successfully completed. Therefore, adopting the design of the present invention has the following advantages: the corresponding replacement operation can be conveniently performed without increasing the existing space for replacing the lamp module; Line jump (Lamp Cable Burnout) risk, and without any additional attachment parts.

Although the present invention has been disclosed in conjunction with the above preferred embodiments, it is not intended to limit the present invention. Any skilled person can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection of the invention should be defined by the appended claims.

Claims (8)

1. A lamp module for a liquid crystal display device, comprising: a light tube; A reflector, comprising a first side, a second side and a third side, the first, second and third sides form a groove for accommodating the lamp tube and reflecting the light emitted by the lamp tube ;as well as A detachment mechanism is arranged on the reflection device, and the side of the liquid crystal display device corresponding to the detachment mechanism is an opening. When the lamp tube module is assembled on the back plate of the liquid crystal display device, the lamp tube module is inserted into the within the back panel; Wherein when the lamp module is assembled on the liquid crystal display device, the dismounting mechanism is exposed outside the back panel of the liquid crystal display device, and is used to use the dismounting mechanism as a point of force to move the lamp module along the replacement direction of the lamp module. The detachment mechanism exerts force to make the lamp module detach from the opening of the back panel of the liquid crystal display device. 2. The lamp module as claimed in claim 1, wherein the detachment mechanism is a concave structure. 3. The lamp module as claimed in claim 1, wherein the detachment mechanism is a perforation structure. 4. The lamp module as claimed in claim 1, wherein the detachment mechanism is a convex structure. 5. The lamp module as claimed in claim 1, wherein a length of the first side of the reflector extending outward from the second side is greater than a length of the third side extending outward from the second side. 6. The lamp module as claimed in claim 5, wherein the first and third sides of the reflector are parallel to each other and perpendicular to the second side. 7. The light tube module according to claim 1, further comprising a light source wire electrically connected to the light tube. 8. The lamp module according to claim 7, further comprising a first cushion and a second cushion, the first cushion covers one end of the lamp tube, and the second cushion covers the lamp The other end of the source wire and the lamp tube is close to the dismounting mechanism.

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