Double-backup redundant liquid crystal backlight light bar

Abstract

The utility model belongs to the technical field of backlight light bars, and particularly relates to a double-backup redundant liquid crystal backlight light bar which comprises a PCB (printed circuit board) strip, LED (light-emitting diode) lamp beads fixed on the PCB strip and a wiring plug fixed at one end of the PCB strip, and the LED lamp beads are arranged along a linear array; the number of the wiring plugs is two, one wiring plug is connected with the LED lamp beads located on the odd number positions, and the other wiring plug is connected with the LED lamp beads located on the even number positions. The LED backlight light bar is of a double-backup redundancy design, namely, the LED lamp beads located on the odd number positions and the LED lamp beads located on the even number positions are mutually independent, the LED lamp beads are lightened at intervals, the brightness requirement cannot be affected, if the LED lamp beads are damaged, the power source connecting wire is directly pulled out and connected to the other wiring plug, and therefore the LED backlight light bar is convenient to use. Maintenance and replacement can be rapidly completed without professionals, the efficiency is high, the time cost and money cost of maintenance are greatly reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of backlight strips, and particularly relates to a dual-backup redundant liquid crystal backlight strip. Background Art

[0002] With the development of display technology, liquid crystals are increasingly widely used. With industrialization, the price of liquid crystals is getting lower and lower, and the application scenarios are no longer limited to TVs and computer monitors. They are also gradually applied to commercial displays, industrial displays, and vehicle displays, slowly replacing some application scenarios of LEDs, especially in indoor, semi-outdoor, and occasions with low brightness requirements.

[0003] The backlight strip is an important part of a liquid crystal display. Since the liquid crystal panel of the liquid crystal display itself does not emit light, in order to achieve the display effect, a backlight module needs to be set on the back side of the liquid crystal panel to realize the display function. The backlight module is divided into a side-light type backlight module and a direct-lit type backlight module according to the structure.

[0004] At present, the main body of the LED backlight strip is mainly composed of a PCB strip, LED lamp beads, and wires.

[0005] In the prior art, multiple mutually parallel LED backlight strips are usually set in a liquid crystal display, and the LED lamp beads of a single LED backlight strip are usually connected in series or in a combination of series and parallel.

[0006] For the LED backlight strip of the prior art, if only a small number of LED lamp beads on one lamp strip are damaged, because there is a backlight board in the liquid crystal display, without considering power consumption, appropriately increasing the brightness of the LED lamp beads can cover up the influence of partial lamp strip damage to a certain extent. However, if a large number of LED lamp beads are damaged, professional technicians must be required for repair, which consumes huge time costs and financial costs, seriously reducing the user experience.

[0007] To solve the above problems, a dual-backup redundant liquid crystal backlight strip is proposed in this application. Content of the Utility Model

[0008] To solve the above problems existing in the prior art, the utility model provides a dual-backup redundant liquid crystal backlight strip, which has the characteristics of convenient use and easy maintenance.

[0009] To achieve the above object, the utility model provides the following technical solution: A dual-backup redundant liquid crystal backlight strip, comprising a PCB strip, LED lamp beads fixed on the PCB strip, and a wiring plug fixed at one end of the PCB strip.

[0010] The LED lamp beads are arranged in a linear array.

[0011] There are two wiring plugs. One wiring plug is connected to the LED lamp beads located at odd positions, and the other wiring plug is connected to the LED lamp beads located at even positions.

[0012] As a preferred technical solution of the present utility model, the LED lamp beads located at odd positions adopt a series and / or parallel connection form.

[0013] As a preferred technical solution of the present utility model, the LED lamp beads located at even positions adopt a series and / or parallel connection form.

[0014] As a preferred technical solution of the present utility model, it further includes:

[0015] A lamp bar bracket, which is fixed inside the display housing, and has an installation groove for installing the PCB bar on the lamp bar bracket, and a slot for the PCB bar to be embedded on the inner wall of the installation groove;

[0016] After the PCB bar is embedded in the slot, a heat dissipation air duct is formed between the lower side of the PCB bar and the inner bottom surface of the installation groove, and heat dissipation holes communicating with the heat dissipation air duct are provided on the bottom surface of the lamp bar bracket.

[0017] As a preferred technical solution of the present utility model, one end of the installation groove is an open end and the other end is a closed end, and the length of the installation groove is equal to the length of the PCB bar.

[0018] As a preferred technical solution of the present utility model, the thickness of the slot is equal to the thickness of the PCB bar.

[0019] As a preferred technical solution of the present utility model, it further includes:

[0020] A fixing foot, on which a fixing hole is processed, and the lamp bar bracket is fixed on the fixing foot.

[0021] As a preferred technical solution of the present utility model, it further includes:

[0022] A connecting block, which is fixed on the outer wall of the lamp bar bracket;

[0023] A threaded column, which is fixed on the fixing foot and passes through the connecting block;

[0024] A locking nut, which is installed on the protruding end of the threaded column by means of screw thread engagement;

[0025] A support spring, which is sleeved on the threaded column and is located between the fixing foot and the connecting block.

[0026] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0027] The LED backlight strip in the present utility model adopts a dual-backup redundancy design, that is, the LED lamp beads located in the odd positions and the even positions are independent of each other. The LED lamp beads are lit in an intermittent manner, which will not affect the brightness requirement. And if an LED lamp bead is damaged, the power connection wire can be directly unplugged and connected to another wiring plug, and it can be quickly repaired and replaced without professional personnel, with high efficiency, and the time cost and money cost of maintenance are greatly reduced, improving the user experience.

[0028] Some of the additional advantages and beneficial effects of this application will be given below, some will become obvious from the following description, or will be understood through the practice of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0030] Figure 1 is a schematic structural diagram of the present utility model;

[0031] Figure 2 is a schematic wiring principle diagram of the first form of the LED lamp beads in the present utility model;

[0032] Figure 3 is a schematic wiring principle diagram of another form of the LED lamp beads in the present utility model;

[0033] Figure 4 is an isometric structural diagram of the present utility model;

[0034] Figure 5 For the present utility model Figure 4 is an enlarged structural diagram of part A;

[0035] Figure 6 is an isometric structural diagram of the lamp bar bracket in the present utility model.

[0036] In the figure: 1, PCB strip; 2, LED lamp bead; 3, wiring plug; 4, lamp bar bracket; 41, installation groove; 411, slot; 42, heat dissipation air duct; 43, connecting block; 44, heat dissipation hole; 5, fixing foot; 51, fixing hole; 6, threaded post; 7, locking nut; 8, support spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention. Embodiment 1

[0038] Please refer to Figure 1 、 Figure 2 、 Figures 4 - 6 The present invention provides the following technical solutions: A dual-backup redundant LCD backlight strip, including a PCB strip 1, LED lamp beads 2 fixed on the PCB strip 1, and a wiring plug 3 fixed at one end of the PCB strip 1.

[0039] Furthermore, as shown by Figure 1 and Figure 2 In this embodiment, the LED lamp beads 2 are arranged in a linear array, and there are two wiring plugs 3. One wiring plug 3 is connected to the LED lamp beads 2 in the odd positions, and the other wiring plug 3 is connected to the LED lamp beads 2 in the even positions. After adopting the above design, in this embodiment, the LED backlight strip is a dual-backup redundant design, that is, the LED lamp beads 2 in the odd positions and the even positions are independent of each other, and the LED lamp beads 2 are lit in an intermittent manner, which will not affect the brightness requirement. And if an LED lamp bead 2 is damaged, directly unplug the power connection line and connect it to the other wiring plug 3. It can be quickly repaired and replaced without professional personnel, with high efficiency, and the time cost and money cost of maintenance are greatly reduced, improving the user experience.

[0040] It should be noted that the above solutions are only exemplary solutions of the present invention and are not used to limit the present invention. The present invention is an exemplary introduction with a long-strip LED backlight strip. In specific use, the LED backlight strip is not limited to a long strip shape. For other shaped LED backlight strips, the dual-backup redundant design of the present invention can also be adopted, such as a circular ring shape, etc., and an intermittent lighting design can be adopted.

[0041] Optionally, as shown by Figure 1 and Figure 2 In this embodiment, the LED lamp beads 2 in the odd positions are connected in series and / or in parallel. The LED lamp beads 2 in the illustration of the present invention are in a parallel form, and the LED lamp beads 2 do not affect each other, that is, the damaged LED lamp beads 2 do not affect the normal lighting of the LED lamp beads 2.

[0042] In actual use, the connection method between the LED lamp beads 2 should be designed according to actual usage requirements and is not limited to series or parallel connections. For the series connection form, the current in each LED lamp bead 2 is equal, but the voltage gradually increases. The advantage of series connection is that the circuit is simple and suitable for scenarios where a single LED lamp bead 2 needs to emit light. The disadvantage is that when one LED lamp bead 2 is damaged, the entire circuit will not work.

[0043] For the parallel connection form, the voltage across each LED lamp bead 2 is equal, and the current is shared. The advantage of parallel connection is that it improves the reliability and service life of the circuit because when one LED lamp bead 2 is damaged, the other LED lamp beads 2 can still work normally. The disadvantage is that the design is more complex and requires more components and debugging.

[0044] Therefore, in actual use, it is necessary to select a suitable connection method according to the rated voltage, power, and quantity.

[0045] Optionally, as shown by Figure 1 and Figure 2 in this embodiment, the LED lamp beads 2 located at even positions adopt a series and / or parallel connection form. In the illustration of the present utility model, the LED lamp beads 2 are in a parallel connection form, and the LED lamp beads 2 do not affect each other, that is, the damaged LED lamp beads 2 do not affect the normal lighting of the LED lamp beads 2.

[0046] Optionally, as shown by Figure 1 and Figures 4 - 6 in this embodiment, it further includes: a lamp bar bracket 4. The lamp bar bracket 4 is fixed inside the display housing, and there is an installation groove 41 for installing the PCB bar 1 on the lamp bar bracket 4. There is a slot 411 on the inner wall of the installation groove 41 for the PCB bar 1 to be inserted. After the PCB bar 1 is inserted into the slot 411, a heat dissipation air duct 42 is formed between the lower side of the PCB bar 1 and the inner bottom surface of the installation groove 41, and there are heat dissipation holes 44 on the bottom surface of the lamp bar bracket 4 that communicate with the heat dissipation air duct 42. After adopting the above design, when installing the LED backlight bar, first fix the lamp bar bracket 4 inside the display housing, and then insert the PCB bar 1 into the slot 411 to achieve a pull-out installation, which is convenient and fast for installation and also facilitates quick maintenance. The lower heat dissipation air duct 42 and heat dissipation holes 44 help to achieve air circulation and facilitate the heat dissipation of the LED backlight bar.

[0047] Optionally, as shown by Figure 1 and Figures 4 - 6 in this embodiment, one end of the installation groove 41 is an open end and the other end is a closed end, and the length of the installation groove 41 is equal to the length of the PCB bar 1. After adopting the above design, it is convenient to achieve the positioning plug-in of the PCB bar 1.

[0048] Optionally, byFigure 1 , Figures 4 - 6 As shown in Figures 4 - 6 , in this embodiment, the thickness of the slot 411 is equal to the thickness of the PCB strip 1. After adopting the above design, the stability of the installation of the LED backlight strip can be effectively improved, and accidental movement of the LED backlight strip can be avoided.

[0049] Optionally, as shown in Figure 1 , Figure 4 , and Figure 5 As shown in Figure 5 , in this embodiment, it further includes: a fixing foot 5, a fixing hole 51 is machined on the fixing foot 5, and the lamp bar bracket 4 is fixed on the fixing foot 5. After adopting the above design, the fixing foot 5 is fixed in the display housing by bolts, and the lamp bar bracket 4 is fixed on the fixing foot 5.

[0050] Preferably, as shown in Figure 1 , Figure 4 , and Figure 5 As shown in Figure 5 , in this embodiment, it further includes: a connecting block 43, a threaded post 6, a locking nut 7, and a support spring 8. The connecting block 43 is fixed to the outer wall of the lamp bar bracket 4, the threaded post 6 is fixed on the fixing foot 5, and the threaded post 6 passes through the connecting block 43. The locking nut 7 is installed on the protruding end of the threaded post 6 by thread screwing, and the support spring 8 is sleeved on the threaded post 6 and is located between the fixing foot 5 and the connecting block 43. After adopting the above design, the threaded post 6 is made to pass through the connecting block 43, and the locking nut 7 is tightened on the protruding end of the threaded post 6 to achieve the stable installation of the lamp bar bracket 4. The support spring 8 is used to flexibly support the lamp bar bracket 4, which has the effect of buffering and shock resistance, improving safety. In addition, due to the presence of the support spring 8, the locking nut 7 can be loosened or tightened to finely adjust the installation height of the lamp bar bracket 4, thereby finely adjusting the installation height of the LED backlight strip and adjusting the distance between the LED backlight strip and the backlight panel. Embodiment 2

[0051] Please refer to Figure 3 emphatically. This embodiment is substantially the same as Embodiment 1, except that in this embodiment, a wiring plug 3 is used to connect the LED lamp beads 2 located at odd positions and even positions at the same time, and an automatic switch, namely switches S1 and S2, is provided between the wiring plug 3 and the first LED lamp bead 2. During daily use, only one of the switches S1 and S2 is closed. Based on the foregoing solution, the switches S1 and S2 can be connected to the intelligent power inspection management system. When abnormal current or voltage is detected, it will automatically switch to the other switch without manual switching of different wiring plugs 3.

[0052] It should be noted that the intelligent power inspection management system is a common power management solution in the power system and has been fully disclosed in the prior art, so it will not be elaborated too much herein.

[0053] The circuit connection involved in the present utility model is a conventional means adopted by those skilled in the art, and technical inspiration can be obtained through a limited number of tests, belonging to the prior art that is widely used.

[0054] The components not described in detail in this article are prior art.

[0055] The working principle and usage process of the present utility model: The LED backlight strip of the present utility model is a dual-backup redundant design, that is, the LED lamp beads 2 located at odd positions and even positions are independent of each other. The LED lamp beads 2 are lit in an intermittent manner, which will not affect the brightness requirement. And if an LED lamp bead 2 is damaged, the power connection line can be directly unplugged and connected to another wiring plug 3. It can be quickly repaired and replaced without professional personnel, with high efficiency. The time cost and money cost of maintenance are greatly reduced, improving the user experience.

[0056] In addition, a control form with one wiring plug 3 and two automatic switches can also be adopted. In daily use, only one of the two automatic switches is closed, and the two automatic switches are connected to the intelligent power inspection management system. When abnormal current or voltage is detected, it will automatically switch to the other switch without manual switching of different wiring plugs 3.

[0057] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dual-backup redundant liquid crystal backlight strip, comprising a PCB strip (1), an LED lamp bead (2) fixed on the PCB strip (1), and a wiring plug (3) fixed at one end of the PCB strip (1), characterized in that: The LED lamp beads (2) are arranged along a linear array; Two wiring plugs (3) are provided, one wiring plug (3) is connected to the LED lamp beads (2) located at odd positions, and the other wiring plug (3) is connected to the LED lamp beads (2) located at even positions.

2. The dual-backup redundant LCD backlight strip according to claim 1, characterized in that: The LED lamp beads (2) located at odd positions are connected in series and / or in parallel.

3. The dual-backup redundant LCD backlight strip according to claim 1, characterized in that: The LED lamp beads (2) located at even-numbered positions are connected in series and / or in parallel.

4. The dual-backup redundant LCD backlight strip according to claim 1, characterized in that: Also includes: A light bar bracket (4), the light bar bracket (4) being fixed in a display housing, and having a mounting groove (41) for mounting the PCB strip (1) on the light bar bracket (4), and having a slot (411) on the inner wall of the mounting groove (41) for the PCB strip (1) to be embedded; After the PCB strip (1) is embedded in the slot (411), a heat dissipation duct (42) is formed between the lower side of the PCB strip (1) and the inner bottom surface of the mounting slot (41), and a heat dissipation hole (44) communicating with the heat dissipation duct (42) is provided on the bottom surface of the light strip bracket (4).

5. The dual-backup redundant LCD backlight strip according to claim 4, characterized in that: One end of the installation groove (41) is an open end and the other end is a closed end, and the length of the installation groove (41) is equal to the length of the PCB strip (1).

6. The dual-backup redundant LCD backlight strip according to claim 4, characterized in that: The thickness of the slot (411) is equal to the thickness of the PCB strip (1).

7. The dual-backup redundant LCD backlight strip according to claim 4, characterized in that: Also includes: A fixing foot (5), wherein a fixing hole (51) is processed on the fixing foot (5), and the light bar bracket (4) is fixed on the fixing foot (5).

8. The dual-backup redundant LCD backlight strip according to claim 7, characterized in that: Also includes: A connecting block (43), the connecting block (43) being fixed to the outer wall of the light bar bracket (4); A threaded column (6), wherein the threaded column (6) is fixed on the fixed foot (5), and the threaded column (6) passes through the connecting block (43); A locking nut (7), the locking nut (7) being mounted on the protruding end of the threaded column (6) by means of a threaded engagement; A support spring (8), wherein the support spring (8) is sleeved on the threaded column (6) and is located between the fixed foot (5) and the connecting block (43).

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