Full-spectrum light source and module applied to LCD display screen

Abstract

The utility model relates to the technical field of light-emitting diode (LED) light sources, and discloses a full-spectrum light source and module applied to a liquid crystal display (LCD) screen, and the full-spectrum light source and module comprises a printed circuit board (PCB) substrate; the first light-emitting chip and the second light-emitting chip are arranged on the PCB substrate, and the first light-emitting chip and the second light-emitting chip are arranged in series; the driving circuit is respectively connected with the first light-emitting chip and the second light-emitting chip and independently controls the excitation current of the first light-emitting chip and the excitation current of the second light-emitting chip; wherein the first light emitting chip is a purple light chip with the wavelength of 380 nm to 450 nm, and the second light emitting chip is a blue light chip with the wavelength of 450 nm to 470 nm; the first light-emitting chip and the second light-emitting chip are at least covered with a fluorescent powder layer, so that the wave band of light emitted by the first light-emitting chip and the second light-emitting chip ranges from 380 nm to 780 nm.

Description

Technical Field

[0001] The utility model relates to the technical field of LCD light sources, and more specifically, to a full-spectrum light source applied to an LCD display screen. Background Art

[0002] Liquid crystal display screens play a very important role in media publicity and advertising promotion. People see liquid crystal display screens in shopping malls and store promotions on the street. The main components of liquid crystal display screens include light source, reflector, light guide plate, prism, diffuser, polarizing film, filter, alignment film, liquid crystal material, thin mode transistor, etc., which constitute the core part of image display. Among them, the light source is the key component for providing backlight, and its quality and performance directly affect the quality and effect of the entire display screen. In traditional liquid crystal display screens, the commonly used backlight source is cold cathode lamp (CCFL). However, due to its high power, short service life, and uneven brightness, it has gradually been replaced by LCD backlight. LCD backlight has the characteristics of low power consumption, high brightness, long life, and uniform light source, so it is widely used in various types of liquid crystal display screens. LCD backlight usually combines primary color light sources and achieves the mixing of different colors by adjusting their wavelengths. This method can produce colors in most of the visible spectrum, but there may be color deviation or deficiency in some specific color areas.

[0003] In order to solve the full spectrum problem of LCD backlight, some LCD screen manufacturers use LCD backlight sources combined with fluorescent materials to produce a wider spectrum. By controlling the ratio of blue light and yellow light, the color temperature and spectral distribution of white light can be adjusted, but the effect of achieving a full spectrum is still not good; and the number of LCD backlight sources that can be installed in the LCD backlight module is limited, and the product mobility of the module is poor. For LCD screens of different specifications, it is necessary to re-open the mold, and the compatibility is not high. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a full-spectrum light source and module for LCD display screens, which can achieve full-spectrum coverage and have the advantages of easy splicing and expandability.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] In a first aspect of the present application, a full-spectrum light source for an LCD display screen is provided, comprising: a PCB substrate; a first light-emitting chip and a second light-emitting chip arranged on the PCB substrate, the first light-emitting chip and the second light-emitting chip being arranged in parallel; a driving circuit, connected to the first light-emitting chip and the second light-emitting chip, respectively, to independently control the excitation current of the first light-emitting chip and the second light-emitting chip; wherein the first light-emitting chip and the second light-emitting chip are covered with at least one phosphor layer, so that the wavelength band of the light emitted by the first light-emitting chip and the second light-emitting chip is between 380nm and 780nm.

[0007] As a preferred technical solution of the present invention, the first light-emitting chip is a 380nm-450nm purple light chip, and the second light-emitting chip is a 450nm-470nm blue light chip.

[0008] As a preferred technical solution of the utility model, the first light-emitting chip is covered with a 500nm cyan phosphor with a nitride oxide 1222 structure to emit a spectrum in the band of 480nm-520nm; the first light-emitting chip is also covered with a lutetium aluminate LuAG-535nm green phosphor to emit a spectrum in the band of 520nm-550nm; the second light-emitting chip is covered with a yttrium aluminum garnet YAG-570nm yellow phosphor to emit a spectrum in the band of 550nm-590nm, and the second light-emitting chip is also covered with a nitride 1113 structure 628nm red phosphor to emit a spectrum in the band of 600nm-780nm.

[0009] As a preferred technical solution of the present invention, the first light-emitting chip and the second light-emitting chip are arranged in sequence and spaced apart in the length direction of the PCB substrate; each of the first light-emitting chip and each of the second light-emitting chip are connected to the driving circuit through independent pins.

[0010] As a preferred technical solution of the utility model, the thickness of the phosphor layer is 10-20 μm.

[0011] In the second aspect of the present application, a module for LCD display screen is also provided, including a first slot plate and a second slot plate, the first slot plate and the second slot plate are arranged in parallel, and connecting mechanisms are arranged on both sides between the first slot plate and the second slot plate, the full-spectrum light source as above is placed in the first slot plate and the second slot plate, and limiting holes are provided on both sides of the full-spectrum light source, slots are provided at the bottom of the first slot plate and the second slot plate on one side of the plurality of limiting holes, baffles are placed on both sides above the two full-spectrum light sources, and telescopic mechanisms are arranged between both sides of the baffle and the first slot plate and the second slot plate, and limiting plug plates are fixed under the plurality of baffles, and one end of the limiting plug plate passes through the limiting hole and is inserted in the slot.

[0012] As a preferred technical solution of the utility model, mounting plates are fixed around the bottom of the first slot plate and the second slot plate, and mounting holes are opened on the mounting plates.

[0013] As a preferred technical solution of the utility model, the connecting mechanism includes an upper plate and a lower plate, the upper plate is fixed on both sides of the second slot plate, and an upper sliding hole is opened on the upper plate, the lower plate is fixed on both sides of the first slot plate, and a lower sliding hole is opened on the lower plate, a sliding plate is slidably arranged in the lower sliding hole, one end of the sliding plate passes through the lower sliding hole and the upper sliding hole and is fixed with a limiting plate, and the limiting plate is placed on one side of the upper plate, sliding rods are fixed on both sides of the side walls of the sliding rod, one end of the sliding rod passes through the lower sliding hole and is fixed with a side plate, a spring is sleeved on the outside of the two sliding rods, one end of the spring is fixed to the lower plate, and the other end of the spring is fixed to the side plate.

[0014] As a preferred technical solution of the utility model, a pull ring is fixed above the baffle.

[0015] As a preferred technical solution of the utility model, the telescopic mechanism includes a slide groove and a side slide plate, the slide groove is opened on the inner walls of the first slot plate and the second slot plate, the side slide plate is fixed on both sides of the baffle plate, and the side slide plate is slidably arranged in the slide groove, and a side slide rod is fixed on the side wall of the slide groove, one end of the side slide rod passes through the side slide plate and is fixed to the other side wall of the slide groove, a side spring is sleeved on one side of the side slide rod, one end of the side spring is fixed on the side slide plate, and the other end of the side spring is fixed to the side wall of the slide groove, and the side spring is in a compressed state.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. The full-spectrum light source is through the PCB substrate, and the first light-emitting chip and the second light-emitting chip arranged on the PCB substrate, by controlling the excitation current of the first light-emitting chip and the second light-emitting chip, and through the excitation current of the first light-emitting chip and the second light-emitting chip to trigger the full-spectrum band; the spectrum light source can provide a wider color gamut, making the color richer and more realistic. This is particularly important for image processing, animation, high-definition video and other fields, and can provide a better visual experience.

[0018] 2. The module places the full-spectrum light source in the slot plate, and the full-spectrum light source can be installed in the slot plate by passing the limiting plug plate through the limiting hole. The two slot plates can be spliced ​​together through the connecting mechanism, so that splicing can be achieved as needed, which facilitates the control of the overall length of the full-spectrum light source. If other sizes of LCD display screens are required, only more slot plates need to be added without re-opening the mold, which increases scalability and mobility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a full-spectrum light source for an LCD display screen provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the structure of another full-spectrum light source for an LCD display screen provided by an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the three-dimensional structure of a module of an LCD display screen provided by an embodiment of the utility model;

[0022] Figure 4 A schematic diagram of a top view of a module of an LCD display screen provided by an embodiment of the utility model;

[0023] Figure 5 The main structural diagram of the module of the LCD display screen provided by the embodiment of the utility model is shown;

[0024] Figure 6 A schematic diagram of the connection mechanism structure of a module of an LCD display screen provided by an embodiment of the utility model;

[0025] Figure 7 The present invention is a schematic diagram of the telescopic mechanism structure of a module of an LCD display screen provided by an embodiment of the present invention.

[0026] In the figure: 1. first slot plate; 2. second slot plate; 3. full-spectrum light source; 4. connecting mechanism; 41. lower plate; 42. upper plate; 43. lower sliding hole; 44. upper sliding hole; 45. slide plate; 46. limit plate; 47. slide bar; 48. spring; 49. side plate; 5. mounting plate; 6. mounting hole; 7. baffle; 8. pull ring; 9. telescopic mechanism; 91. slide groove; 92. side slide plate; 93. side slide bar; 94. side spring; 10. limit hole; 11. limit plug plate; 12. slot. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Embodiment 1

[0029] See also Figure 1 as well as Figure 2A full-spectrum light source 3 applied to an LCD display screen comprises a PCB substrate 31, the PCB substrate 31 is in a strip shape, a first light-emitting chip 32 and a second light-emitting chip 33 are on the PCB substrate 31, and the first light-emitting chip 32 and the second light-emitting chip 33 are arranged in parallel; a driving circuit 34 is respectively connected to the first light-emitting chip 32 and the second light-emitting chip 33, and independently controls the excitation current of the first light-emitting chip 32 and the second light-emitting chip 33; wherein the first light-emitting chip 32 is a 380nm-450nm purple light chip, and the second light-emitting chip 33 is a 450nm-470nm blue light chip; the first light-emitting chip 32 and the second light-emitting chip 33 are covered with at least one layer of phosphor layer (not shown in the figure), so that the wavelength band of the light emitted by the first light-emitting chip 32 and the second light-emitting chip 33 is between 380nm and 780nm.

[0030] Furthermore, the first light-emitting chip 32 is covered with a 500nm cyan phosphor with a nitride oxide 1222 structure to emit a spectrum in the range of 480nm-520nm; the first light-emitting chip is also covered with a lutetium aluminate LuAG-535nm green phosphor to emit a spectrum in the range of 520nm-550nm.

[0031] Furthermore, the second light-emitting chip 33 is covered with yttrium aluminum garnet type YAG-570nm yellow phosphor to emit a spectrum in the band of 550nm-590nm, and the second light-emitting chip is also covered with nitride 1113 structure 628nm red phosphor to emit a spectrum in the band of 600nm-780nm.

[0032] The first light emitting chips 32 and the second light emitting chips 33 are arranged in sequence and spaced apart from each other. Each of the first light emitting chips 32 and the second light emitting chips 33 is connected to the driving circuit 34 via an independent pin.

[0033] In an optional way, such as Figure 1 As shown, each column includes only one light-emitting chip, and along the length direction of the PCB substrate 31, the first light-emitting chip 32, the second light-emitting chip 33, the first light-emitting chip 32... are arranged in order, and each first light-emitting chip 32 and the second light-emitting chip 33 are connected to the driving circuit 34 through independent pins.

[0034] In another alternative, if Figure 2As shown, the first light-emitting chip 32 and the second light-emitting chip 33 may also be arranged in parallel, and each column includes two light-emitting chips, specifically, a first light-emitting chip 32 and a second light-emitting chip 33 opposite thereto, that is, along the length direction of the PCB substrate 31, each row includes a plurality of first light-emitting chips 32 and a plurality of second light-emitting chips 33, and the first light-emitting chip 32 and the second light-emitting chip 33 are arranged in parallel (or may be staggered), and each first light-emitting chip 32 and the second light-emitting chip 33 are also connected to the driving circuit 34 through independent pins.

[0035] Furthermore, the thickness of the phosphor layer is 10-20 μm.

[0036] In summary, Embodiment 1 provides a full-spectrum light source 3 for an LCD display screen, which combines a first light-emitting chip 32 (purple chip) and a second light-emitting chip 33 (blue chip), as well as a phosphor layer covering the chip, to provide a wider full-spectrum output for the LCD display screen. More realistic and natural color reproduction. Due to its full-spectrum characteristics, a complete spectrum from ultraviolet to infrared can be produced, thereby providing a wider color gamut and higher color saturation. The LCD display screen is able to display richer and more accurate colors, especially in the red and green areas. Secondly, this light source improves the energy efficiency of the LCD display screen. By independently controlling the excitation current of the first light-emitting chip 32 and the second light-emitting chip 33, the intensity and color of the output light can be precisely adjusted. The full-spectrum light source 3 can produce brighter and more saturated light by optimizing the excitation current ratio of the first light-emitting chip 32 and the second light-emitting chip 33, as well as the excitation power spectrum of the phosphor layer. This helps to improve the brightness and contrast of the display screen and improve the user experience.

[0037] Embodiment 2

[0038] Based on the first embodiment, Figures 3 to 7 As shown, the second embodiment of the utility model provides a module applied to an LCD display screen, including a first slot plate 1 and a second slot plate 2, the first slot plate 1 and the second slot plate 2 are arranged in parallel, and connecting mechanisms 4 are arranged on both sides between the first slot plate 1 and the second slot plate 2, and the first slot plate 1 and the second slot plate 2 can be spliced ​​together through the connecting mechanism 4, full-spectrum light sources 3 are placed in the first slot plate 1 and the second slot plate 2, and limiting holes 10 are provided on both sides of the full-spectrum light sources 3, and slots 12 are provided on the bottom of the first slot plate 1 and the second slot plate 2 on one side of the plurality of limiting holes 10, baffles 7 are placed on both sides above the two full-spectrum light sources 3, and telescopic mechanisms 9 are arranged between both sides of the baffles 7 and the first slot plate 1 and the second slot plate 2, and limiting plug plates 11 are fixed below the plurality of baffles 7, and one end of the limiting plug plate 11 passes through the limiting hole 10 and is inserted in the slot 12, and the full-spectrum light source 3 can be installed in the first slot plate 1 and the second slot plate 2 by passing one end of the limiting plug plate 11 through the limiting hole 10.

[0039] The first slot plate 1 and the second slot plate 2 are both fixed with mounting plates 5 around their bottoms, and mounting holes 6 are provided on the mounting plates 5 , through which the slot plates can be conveniently mounted.

[0040] The connecting mechanism 4 includes an upper plate 42 and a lower plate 41, wherein the upper plate 42 is fixed on both sides of the second slot plate 2, and an upper sliding hole 44 is provided on the upper plate 42, and the lower plate 41 is fixed on both sides of the first slot plate 1, and a lower sliding hole 43 is provided on the lower plate 41, and a slide plate 45 is slidably provided in the lower sliding hole 43, and one end of the slide plate 45 passes through the lower sliding hole 43 and the upper sliding hole 44 and is fixed with a limiting plate 46, and the limiting plate 46 is placed on one side of the upper plate 42, and the upper plate 42 can be limited by placing the limiting plate 46 on one side of the upper plate 42, so that the first slot plate 1 can be moved. A slot plate 1 and a second slot plate 2 are spliced, and sliding rods 47 are fixed on both sides of the side walls of the slide plate 45. One end of the sliding rod 47 passes through the lower sliding hole 43 and is fixed with a side plate 49. A spring 48 is sleeved on the outside of the two sliding rods 47. One end of the spring 48 is fixed on the lower plate 41, and the other end of the spring 48 is fixed on the side plate 49. When it is necessary to disassemble the first slot plate 1 and the second slot plate 2, it is only necessary to press the side plate 49. Pressing the side plate 49 can drive the slide plate 45 to move, and then move the lower plate 41 to pull the limit plate 46 out along the upper sliding hole 44.

[0041] A pull ring 8 is fixed above the baffle 7 , and the pull ring 8 can be used to facilitate the movement of the baffle 7 .

[0042] Among them, the telescopic mechanism 9 includes a slide groove 91 and a side slide plate 92. The slide groove 91 is opened on the inner wall of the first slot plate 1 and the second slot plate 2. The side slide plate 92 is fixed on both sides of the baffle plate 7, and the side slide plate 92 is slidably arranged in the slide groove 91. A side slide rod 93 is fixed to the side wall of the slide groove 91. One end of the side slide rod 93 passes through the side slide plate 92 and is fixed to the other side wall of the slide groove 91. A side spring 94 is sleeved on one side of the side slide rod 93. One end of the side spring 94 is fixed on the side slide plate 92, and the other end of the side spring 94 is fixed to the side wall of the slide groove 91, and the side spring 94 is in a compressed state. The side spring 94 is in a compressed state to apply a force to the baffle 7, so that the limiting plug plate 11 can be inserted in the limiting hole 10 more stably. When the full-spectrum light source 3 needs to be disassembled, it is only necessary to pull the pull ring 8 to pull the limiting plug plate 11 out of the limiting hole 10.

[0043] The working principle and use process of the utility model are as follows: by placing the full-spectrum light source 3 in the slot plate, the full-spectrum light source 3 can be installed in the slot plate by passing the limiting plug plate 11 through the limiting hole 10, and the two slot plates can be spliced ​​together through the connecting mechanism 4, so that splicing can be achieved according to needs, which facilitates the control of the overall length of the full-spectrum light source. If LCD display screens of other sizes are required, only more slot plates need to be added, and there is no need to re-open the mold, thereby increasing scalability and mobility.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A full-spectrum light source for LCD display screen, characterized in that: include: PCB substrate; A first light-emitting chip and a second light-emitting chip are arranged on the PCB substrate, wherein the first light-emitting chip and the second light-emitting chip are arranged in parallel; A driving circuit, connected to the first light-emitting chip and the second light-emitting chip, respectively, and independently controlling the excitation current of the first light-emitting chip and the second light-emitting chip; Among them, the first light-emitting chip is a 380nm-450nm purple light chip, and the second light-emitting chip is a 450nm-470nm blue light chip; the first light-emitting chip and the second light-emitting chip are covered with at least one layer of phosphor layer so that the wavelength band of the light emitted by the first light-emitting chip and the second light-emitting chip is between 380nm and 780nm.

2. The full-spectrum light source according to claim 1, characterized in that: The first light-emitting chip is covered with a 500nm cyan phosphor with a nitride oxide 1222 structure to emit a spectrum in the range of 480nm-520nm; The first light-emitting chip is covered with lutetium aluminate LuAG-535nm green phosphor to emit a spectrum with a wavelength band of 520nm-550nm.

3. The full-spectrum light source according to claim 1, characterized in that: The second light-emitting chip is covered with yttrium aluminum garnet type YAG-570nm yellow phosphor to emit a spectrum in the wavelength range of 550nm-590nm; The second light emitting chip is covered with a nitride 1113 structure 628nm red phosphor to emit a spectrum in the wavelength range of 600nm-780nm.

4. The full-spectrum light source according to claim 1, characterized in that: The first light-emitting chip and the second light-emitting chip are arranged in sequence and spaced apart in the length direction of the PCB substrate; Each of the first light-emitting chips and each of the second light-emitting chips are connected to the driving circuit via independent pins.

5. The full-spectrum light source according to claim 2 or 3, characterized in that: The thickness of the phosphor layer is 10-20 μm.

6. A module applied to an LCD display screen, characterized in that: The invention comprises a first slot plate (1) and a second slot plate (2), wherein the first slot plate (1) and the second slot plate (2) are arranged in parallel, and connecting mechanisms (4) are arranged on both sides between the first slot plate (1) and the second slot plate (2), and the full-spectrum light source according to any one of claims 1 to 5 is placed in the first slot plate (1) and the second slot plate (2); Limiting holes (10) are provided on both sides of the full-spectrum light source (3); slots (12) are provided at the bottom of the first slot plate (1) and the second slot plate (2) on one side of the plurality of limiting holes (10); baffles (7) are placed on both sides above the two full-spectrum light sources; telescopic mechanisms (9) are provided between both sides of the baffles (7) and the first slot plate (1) and the second slot plate (2); limiting plug plates (11) are fixed below the plurality of baffles (7); and one end of the limiting plug plates (11) passes through the limiting hole (10) and is inserted into the slot (12).

7. The module for LCD display screen according to claim 6, characterized in that: Mounting plates (5) are fixed around the bottom of the first slot plate (1) and the second slot plate (2), and mounting holes (6) are provided on the mounting plates (5).

8. The module for LCD display screen according to claim 7, characterized in that: The connecting mechanism (4) comprises an upper plate (42) and a lower plate (41), wherein the upper plate (42) is fixed on both sides of the second slot plate (2), and an upper sliding hole (44) is provided on the upper plate (42), and the lower plate (41) is fixed on both sides of the first slot plate (1), and a lower sliding hole (43) is provided on the lower plate (41), a sliding plate (45) is slidably provided in the lower sliding hole (43), and one end of the sliding plate (45) passes through the lower sliding hole (43) and the upper sliding hole (44). 4) and fixed with a limit plate (46), and the limit plate (46) is placed on one side of the upper plate (42), and sliding rods (47) are fixed on both sides of the side walls of the slide plate (45), one end of the sliding rod (47) passes through the lower sliding hole (43) and is fixed with a side plate (49), and a spring (48) is sleeved on the outside of the two sliding rods (47), one end of the spring (48) is fixed on the lower plate (41), and the other end of the spring (48) is fixed on the side plate (49).

9. The module for LCD display screen according to claim 8, characterized in that: A pull ring (8) is fixed above the baffle (7).

10. The module for LCD display screen according to claim 9, characterized in that: The telescopic mechanism (9) comprises a slide groove (91) and a side slide plate (92); the slide groove (91) is provided on the inner walls of the first slot plate (1) and the second slot plate (2); the side slide plate (92) is fixed on both sides of the baffle plate (7), and the side slide plate (92) is slidably arranged in the slide groove (91); a side slide rod (93) is fixed on the side wall of the slide groove (91); one end of the side slide rod (93) passes through the side slide plate (92) and is fixed on the other side wall of the slide groove (91); a side spring (94) is sleeved on one side of the side slide rod (93); one end of the side spring (94) is fixed on the side slide plate (92), and the other end of the side spring (94) is fixed on the side wall of the slide groove (91), and the side spring (94) is in a compressed state.

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