Backlight module and display device

Abstract

Embodiments of the present application disclose a backlight module and a display device, and relate to the technical field of display. The backlight module comprises a light guide plate and a lamp plate. The lamp plate comprises a substrate, a white light emitting unit, a red-green-blue light emitting unit and a power supply trace. The white light emitting unit comprises a first blue light emitting chip and a photo-luminescence part for converting blue light into white light. The red-green-blue light emitting unit comprises a red light emitting chip, a green light emitting chip and a second blue light emitting chip. At least one of the red light emitting chip and the green light emitting chip is arranged between the second blue light emitting chip and the first blue light emitting chip. The first power supply trace is connected with the first blue light emitting chip, the second blue light emitting chip and the green light emitting chip, and the second power supply trace is connected with the red light emitting chip. The embodiments of the present application can reduce the influence of the second blue light emitting chip on the white light emitting unit, and can also reduce the number of power supply traces, thereby simplifying the wiring structure of the lamp plate.

Description

Technical Field

[0001] Embodiments of this application relate to the field of display technology, and more particularly to a backlight module and a display device. Background Technology

[0002] The display device may include a backlight module, which may include a white light-emitting unit and red, green and blue light-emitting units. The white light-emitting unit can emit white light, and the red, green and blue light-emitting units can emit red light, green light and blue light.

[0003] A white light-emitting unit may include a first blue light-emitting chip and a photoluminescent unit, wherein the photoluminescent unit is capable of converting the blue light emitted by the blue light-emitting chip into white light. A red-green-blue light-emitting unit may include a red light-emitting chip, a green light-emitting chip, and a second blue light-emitting chip.

[0004] Typically, a large number of power supply traces are required to supply power to the first blue LED, the red LED, the green LED, and the second blue LED, which is not conducive to simplifying the wiring structure of the LED board. Summary of the Invention

[0005] The embodiments of this application provide a backlight module and a display device that can reduce the number of power supply traces and simplify the trace structure of the substrate.

[0006] On one hand, embodiments of this application provide a backlight module. The backlight module includes a light guide plate and a lamp plate. The lamp plate is disposed on the light-incident side of the light guide plate and is used to emit light to the light guide plate to provide backlight for the liquid crystal panel. The lamp plate includes a substrate, light-emitting units, and power lines. The light-emitting units are disposed on one side of the substrate along the thickness direction of the substrate, and there are multiple light-emitting units, including white light-emitting units and red-green-blue light-emitting units. The white light-emitting unit includes a first blue light-emitting chip and a photoluminescent part, which is disposed on the light-emitting side of the first blue light-emitting chip and is used to convert blue light into white light. The red-green-blue light-emitting units are disposed on one side of the white light-emitting units along a first direction, and each red-green-blue light-emitting unit includes multiple light-emitting chips, including a red light-emitting chip, a green light-emitting chip, and a second blue light-emitting chip, which are arranged along the first direction. Along the first direction, at least one of the red and green light-emitting chips is disposed between the second blue light-emitting chip and the first blue light-emitting chip. Power lines are disposed on the substrate. Power traces extend along a first direction and are positioned on one side of multiple light-emitting units along a second direction, perpendicular to the first direction. The power traces include a first power trace and a second power trace. The first power trace connects to a first blue light-emitting chip, a second blue light-emitting chip, and a green light-emitting chip, providing power to these chips. The second power trace connects to a red light-emitting chip, providing power to it.

[0007] In the embodiments of this application, the light-emitting unit includes a white light-emitting unit and red-green-blue light-emitting units, so that the white light-emitting unit can compensate for the intensity of red and green light, which is beneficial to improving the overall luminous efficiency of the light-emitting unit, enabling the display device to have a wider color gamut and higher brightness, which is beneficial to improving the display performance of the display device.

[0008] Along the first direction, at least one of the red light-emitting chip and the green light-emitting chip is disposed between the second blue light-emitting chip and the first blue light-emitting chip, so that at least one of the red light-emitting chip and the green light-emitting chip can isolate the second blue light-emitting chip and the first blue light-emitting chip, reducing the risk of blue light emitted by the second blue light-emitting chip irradiating the photoluminescent part of the white light-emitting unit, that is, reducing the impact of blue light emitted by the second blue light-emitting chip on the white light-emitting unit, so that the white light-emitting unit can emit white light of a set intensity, which is beneficial to improving the display performance of the display device.

[0009] Understandably, the power trace extends along the first direction, enabling it to connect with multiple light-emitting units arranged along the first direction. The power trace is positioned along the second direction on one side of the multiple light-emitting units, reducing the mutual interference between the power trace and the light-emitting units.

[0010] The first power supply trace powers the blue LEDs (including the first and second blue LEDs) and the green LED, while the second power supply trace powers the red LED. This reduces the mutual interference between the power supplies for the blue and green LEDs and the power supply for the red LED. Furthermore, since the blue and green LEDs are powered through the same power supply trace (i.e., the first power supply trace), the number of power supply traces is reduced, as is the space they occupy on the substrate, which simplifies the wiring structure of the LED board.

[0011] In some possible implementations, the number of red light-emitting chips is at least two, and the at least two red light-emitting chips are connected in series and connected to the second power supply line; and / or, the number of green light-emitting chips is at least two, and the at least two green light-emitting chips are connected in series and connected to the first power supply line; and / or, the number of second blue light-emitting chips is at least two, and the at least two second blue light-emitting chips are connected in series and connected to the first power supply line.

[0012] Understandably, at least two red LEDs are connected in series and to the second power supply trace, so that at least two red LEDs do not need to be individually connected to the second power supply trace. At least two green LEDs are connected in series and to the first power supply trace, so that at least two green LEDs do not need to be individually connected to the first power supply trace. At least two second blue LEDs are connected in series and to the first power supply trace, so that at least two second blue LEDs do not need to be individually connected to the first power supply trace.

[0013] The above connection method simplifies the wiring structure of the lamp board, reduces the space occupied by the wiring on the substrate, and facilitates the miniaturization of the substrate.

[0014] In some possible implementations, the plurality of light-emitting units arranged adjacent to each other along a first direction include a first light-emitting unit and a second light-emitting unit. The lamp board also includes a driver chip, and the driver chip and the light-emitting units are disposed on the same side of the substrate. In cases where at least two red light-emitting chips are connected in series and to a second power supply line, at least two green light-emitting chips are connected in series and to a first power supply line, and at least two second blue light-emitting chips are connected in series and to a first power supply line, the at least two second blue light-emitting chips connected in series in the first light-emitting unit and the at least two second blue light-emitting chips connected in series in the second light-emitting unit form a blue light-emitting chip group, which is connected to the first power supply line and the driver chip. Similarly, at least two green light-emitting chips connected in series in the first light-emitting unit and the at least two green light-emitting chips connected in series in the second light-emitting unit form a green light-emitting chip group, which is connected to the first power supply line and the driver chip. Finally, at least two red light-emitting chips connected in series in the first light-emitting unit and the at least two red light-emitting chips connected in series in the second light-emitting unit form a red light-emitting chip group, which is connected to the second power supply line and the driver chip. The white light-emitting unit in the first light-emitting unit and the white light-emitting unit in the second light-emitting unit are connected in series to form a white light-emitting unit group, which is connected to the first power supply line and the driver chip.

[0015] By adopting the above configuration, the number of traces on the substrate can be reduced, which helps to simplify the trace structure, thereby reducing the space occupied by the traces on the substrate and facilitating the miniaturization of the substrate.

[0016] In some possible implementations, the backlight module further includes a first connection trace, a second connection trace, and a third connection trace. The first connection trace includes a main connection line, a first connection branch line, and a second connection branch line. The main connection line is connected to a first power supply trace. The first connection branch line connects the main connection line to the blue light-emitting chip group. The second connection branch line connects the main connection line to the green light-emitting chip group. The second connection trace connects the first power supply trace to the white light-emitting unit group. The third connection trace connects the second power supply trace to the red light-emitting chip group.

[0017] By adopting the above configuration, multiple second blue light-emitting chips in the blue light-emitting chip group and multiple green light-emitting chips in the green light-emitting chip group can be connected to the first power supply line respectively, so that the first power supply line can supply power to the second blue light-emitting chips and the green light-emitting chips.

[0018] In addition, the first power supply line can also supply power to multiple white light-emitting units in the white light-emitting unit group, and the second power supply line can supply power to at least two red light-emitting chips in the red light-emitting chip group.

[0019] In some possible implementations, along the second direction, the first power trace is closer to the light-emitting unit than the second power trace. The first power trace includes multiple power trace segments, which are spaced apart along the first direction. The backlight module also includes a crossover structure disposed on the substrate and located between two adjacent power trace segments. The crossover structure connects the two power trace segments and crosses a third connection trace.

[0020] Understandably, the cross-line structure is set on the substrate and crosses the third connection trace, so that the third connection trace can be connected to the red light-emitting chip group, reducing the mutual influence between the third connection trace and the first power supply trace.

[0021] In some possible implementations, the multiple power supply traces include a first power supply trace and a second power supply trace spaced apart along a first direction. One of the first and second connecting traces is connected to the first power supply trace, and the other of the first and second connecting traces is connected to the second power supply trace. The first and second light-emitting units form a light-emitting unit group, and there are multiple light-emitting unit groups. Along the first direction, a third connecting trace is located between two adjacent light-emitting unit groups, and the first and second connecting traces are located on both sides of the third connecting trace.

[0022] Understandably, one of the first and second connecting traces is connected to the first power supply trace segment, and the other is connected to the second power supply trace segment. This can reduce the mutual interference when the first connecting trace powers the second blue and green light-emitting chips and the second connecting trace powers the white light-emitting unit (the first blue light-emitting chip). In addition, it can also reduce the mutual interference between the first and second connecting traces, so that the first and second connecting traces do not need to cross, which helps to simplify the wiring structure of the lamp board.

[0023] The first, second, and third connection traces can all be located between two light-emitting unit groups, which can reduce the mutual influence between the connection traces and the light-emitting units, and enable the connection traces to connect to the white light-emitting unit group, the green light-emitting chip group, and the blue light-emitting chip group.

[0024] The first and second connecting traces are located on both sides of the third connecting trace, which improves the ease of connection between the first and second connecting traces and the first and second power supply trace segments. This eliminates the need for the first, second, and third connecting traces to cross each other, thus simplifying the wiring structure of the lamp board.

[0025] In some possible implementations, there are two second blue light-emitting chips, arranged adjacent to each other. This arrangement can increase the intensity of the blue light emitted by the light panel.

[0026] In some possible implementations, the two second blue light-emitting chips include a first second blue light-emitting chip and a second second blue light-emitting chip, which are arranged adjacent to each other. There are two green light-emitting chips, each consisting of a first green light-emitting chip and a second green light-emitting chip, arranged on either side of the first and second blue light-emitting chips. There are also two red light-emitting chips, each consisting of a first red light-emitting chip and a second red light-emitting chip, arranged on either side of the first and second green light-emitting chips.

[0027] Understandably, two green light-emitting chips are respectively positioned on either side of two second blue light-emitting chips, and two red light-emitting chips are respectively positioned on either side of two green light-emitting chips. This allows the multiple light-emitting chips in the red-green-blue light-emitting unit to be arranged sequentially in the order of red light-emitting chip (e.g., first red light-emitting chip), green light-emitting chip (e.g., first green light-emitting chip), second blue light-emitting chip (e.g., first second blue light-emitting chip), second blue light-emitting chip (e.g., second second blue light-emitting chip), green light-emitting chip (e.g., second green light-emitting chip), and red light-emitting chip (e.g., second red light-emitting chip). In other words, the two red light-emitting chips, two green light-emitting chips, and two second blue light-emitting chips can be symmetrically positioned relative to the axis of the red-green-blue light-emitting unit, which helps to improve the mixing effect of red, green, and blue light in the red-green-blue light-emitting unit, thereby improving the display performance of the display device.

[0028] The first red and first green light-emitting chips are disposed between the two second blue light-emitting chips and the white light-emitting unit. The second red and second green light-emitting chips are disposed between the two second blue light-emitting chips and the white light-emitting unit of the other light-emitting units. This allows the red and green light-emitting chips to isolate the second blue light-emitting chips and the white light-emitting unit, reducing the risk of blue light emitted by the second blue light-emitting chips irradiating the photoluminescent part. This enables the white light-emitting unit to emit white light of a set intensity, which is beneficial to improving the display performance of the display device.

[0029] In some possible implementations, the wavelength of the blue light emitted by the first blue light-emitting chip is different from the wavelength of the blue light emitted by the second blue light-emitting chip.

[0030] By setting the wavelength of the blue light emitted by the first blue light-emitting chip to be different from that emitted by the second blue light-emitting chip, the intensity of blue light emitted by the first and second blue light-emitting chips can be controlled to vary according to different display requirements, thereby improving the applicability of the display device.

[0031] On the other hand, embodiments of this application provide a display device. The display device includes a backlight module and a liquid crystal panel as described above. The liquid crystal panel is disposed in the light emission direction of the light guide plate of the backlight module.

[0032] The display device provided in the embodiments of this application includes the backlight module as described above, and therefore has all the above-described beneficial effects, which will not be repeated here. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a display device provided in some embodiments of this application;

[0034] Figure 2 This is a schematic diagram of the structure of a display panel provided in some embodiments of this application;

[0035] Figure 3 This is a schematic diagram of the structure of the lamp panel provided in some embodiments of this application;

[0036] Figure 4 This is a schematic diagram showing the arrangement of multiple light-emitting chips in a red, green, and blue light-emitting unit provided in some embodiments of this application;

[0037] Figure 5 This is a schematic diagram showing the arrangement of multiple light-emitting chips in a red, green, and blue light-emitting unit provided in other embodiments of this application;

[0038] Figure 6 A schematic diagram showing the arrangement of multiple light-emitting chips in a red, green, and blue light-emitting unit provided in some embodiments of this application;

[0039] Figure 7 This is a schematic diagram of the structure of a lamp panel provided in some embodiments of this application;

[0040] Figure 8 This is a schematic diagram of the structure of a lamp panel provided in some embodiments of this application;

[0041] Figure 9 for Figure 8 A magnified schematic diagram of a portion of region C1;

[0042] Figure 10 for Figure 9 A magnified schematic diagram of the C11 region.

[0043] Explanation of icon numbers:

[0044] 100-Light board, 110-Substrate, 111-Substrate body, 112-Protrusion, 120-Light-emitting unit, 121-First light-emitting unit, 122-Second light-emitting unit, 120a-Light-emitting unit group, 130-White light-emitting unit, 131-First blue light-emitting chip, 132-Photoluminescent part, 140-Red, green, and blue light-emitting unit, 141-Light-emitting chip, 1411-Red light-emitting chip, 1411a-First red light-emitting chip, 1411b-Second red light-emitting chip, 1412-Green light-emitting chip, 1412a-First green light-emitting chip, 1412b-Second green light-emitting chip, 1413-Second blue light-emitting chip, 1413a-First second blue light-emitting chip, 1413b-Second second blue light-emitting chip, 170-Power trace, 171-First power trace, 1711- Power trace segment, 1711a - First power trace segment, 1711b - Second power trace segment, 172 - Second power trace, 180 - Driver chip, 191 - First connection trace, 1911 - Main connection line, 1912 - First connection branch line, 1913 - Second connection branch line, 192 - Second connection trace, 193 - Third connection trace, 220 - Light guide plate, 200 - Backlight module, 201 - Crossover line Structure, 202-Terminal block, 230-Heat sink, 231-Base plate, 232-Side plate, 300-Display panel, 310-Back plate, 311-First sub-board, 312-Second sub-board, 320-LCD panel, 321-Drive circuit layer, 322-LCD layer, 3221-LCD molecules, Color filter 323, 400-Display device, 410-Housing, Q-Axis of red, green and blue light-emitting unit 140. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0047] As used herein, terms such as “equal,” “parallel,” and “perpendicular” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equal items less than or equal to 5% of either one.

[0048] In the embodiments of this application, the directional indications used to explain the structure and movement of different components, such as up, down, left, right, front, and back, are relative. These indications are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, these directional indications will also change accordingly.

[0049] Figure 1 This is a schematic diagram of the structure of a display device provided in some embodiments of this application. For example... Figure 1 As shown, an embodiment of this application provides a display device 400, which has an image display function.

[0050] The display device 400 can be a television, laptop computer, tablet computer, in-vehicle computer, smartphone, and smartwatch, etc. The embodiments of this application do not further limit the specific form of the display device 400.

[0051] In some examples, such as Figure 1 As shown, the display device 400 includes a display panel 300 and a housing 410. The housing 410 is connected to the display panel 300 and protects the display panel 300. Understandably, the display panel 300 is capable of displaying image information.

[0052] Figure 2 This is a schematic diagram illustrating the structure of a display panel provided in some embodiments of this application. In some examples, such as... Figure 2 As shown, the display panel 300 may include a backlight module 200 and a liquid crystal panel 320. Understandably, the backlight module 200 is capable of emitting light.

[0053] In some examples, such as Figure 2 As shown, the backlight module 200 may include a lamp board 100 and a light guide plate 220.

[0054] A lamp panel 100 is disposed on the light-incident side of the light guide plate 220. The lamp panel 100 emits light to the light guide plate 220 to provide backlight for the liquid crystal panel 320. For example, the liquid crystal panel 320 is disposed in the light-emitting direction of the light guide plate 220. Understandably, the light guide plate 220 can guide the light emitted from the lamp panel 100 to the liquid crystal panel 320. For example, the backlight module 200 in which the light guide plate 220 guides the light can be referred to as an edge-lit backlight module.

[0055] In other examples, the backlight module 200 may not include a light guide plate. In this case, the liquid crystal panel 320 can be positioned on the light-emitting side of the lamp board 100, so that the light emitted by the light-emitting unit 120 of the lamp board 100 can illuminate the liquid crystal panel 320, that is, the lamp board 100 can provide backlight for the liquid crystal panel 320. For example, a backlight module in which the liquid crystal panel 320 is positioned on the light-emitting side of the lamp board 100 can be called a direct-lit backlight module.

[0056] The embodiments of this application take the backlight module 200 as an example of an edge-lit backlight module, and will continue to illustrate with examples.

[0057] In some examples, such as Figure 2 As shown, the lamp panel 100 includes a substrate 110 and a light-emitting unit 120, with the light-emitting unit 120 disposed on one side of the substrate 110 along the thickness direction of the substrate 110.

[0058] The substrate 110 may include at least one of a printed circuit board (PCB) and a flexible printed circuit (FPC). Taking a PCB as an example, the substrate 110 may be a single-layer aluminum substrate. Alternatively, the substrate 110 may be a multilayer substrate, or it may be a copper substrate. The embodiments of this application do not further limit the specific form of the substrate 110.

[0059] The light-emitting unit 120 is capable of emitting light. For example, the light-emitting unit 120 may include a light-emitting diode (LED), such as a micro light-emitting diode (Micro LED) or a sub-millimeter light-emitting diode (Mini LED). The embodiments of this application do not further limit the specific form of the light-emitting diode included in the light-emitting unit 120.

[0060] In some examples, the number of light-emitting units 120 is multiple. For example, when the backlight module 200 is a direct-lit backlight module, the multiple light-emitting units 120 may also be arranged in an array along the first direction X and the second direction Y on the substrate 110. When the backlight module 200 is an edge-lit backlight module, the multiple light-emitting units 120 may be arranged at intervals along the first direction X on the substrate 110.

[0061] The first direction X and the second direction Y are perpendicular. Understandably, the first direction X and the second direction Y can be perpendicular or approximately perpendicular; that is, the angle between the first direction X and the second direction Y can be 90°, 88°, or 89°, etc.

[0062] For example, such as Figure 2 As shown, the liquid crystal panel 320 may include a driving circuit layer 321 and a liquid crystal layer 322 stacked together. The driving circuit layer 321 includes multiple driving circuits; for example, the driving circuits may be thin film transistor (TFT) driving circuits. The liquid crystal layer 322 includes multiple liquid crystal molecules 3221. The driving circuits can apply a deflection voltage to the liquid crystal molecules 3221, causing the liquid crystal molecules 3221 to deflect under the influence of the deflection voltage, thereby transmitting or blocking light.

[0063] Continue to refer to Figure 2 The LCD panel 320 may also include a color filter 323, which is disposed on the light-emitting side of the liquid crystal layer 322. The color filter 323 may have red, green, and blue pixels. Red pixels transmit red light, green pixels transmit green light, and blue pixels transmit blue light.

[0064] Understandably, by controlling the deflection angle of the liquid crystal molecules 3221, red, green and blue light of different intensities can pass through the color filter 323, thereby enabling the display panel 300 to achieve full-color display.

[0065] For example, the liquid crystal panel 320 may also include an optical film layer (not shown in the figure), which may be disposed on the light-incident side of the liquid crystal layer 322. The optical film layer may include prisms and light-diffusing films, etc., whereby the prisms are used to enhance brightness and the light-diffusing films are used to uniformly distribute light.

[0066] Alternatively, the optical film layer may also include other film layers besides the prism and the light-diffusing film. The embodiments of this application do not further limit the specific form of the optical film layer. The lamp board 100 of the backlight module 200 is illustrated below.

[0067] Figure 3 This is a schematic diagram of the structure of a lamp panel provided in some embodiments of this application. In some examples, such as... Figure 3As shown, the light-emitting unit 120 includes a white light-emitting unit 130 and a red-green-blue light-emitting unit 140. Understandably, the white light-emitting unit 130 is capable of emitting white light, and the red-green-blue light-emitting unit 140 is capable of emitting red light, green light, and blue light.

[0068] The light-emitting unit 120 includes a white light-emitting unit 130 and red, green and blue light-emitting units 140, so that the white light-emitting unit 130 can compensate for the intensity of red and green light, improve the overall luminous efficiency of the light-emitting unit 120, and enable the display device 400 to have a wider color gamut and higher brightness, which is beneficial to improving the display performance of the display device 400.

[0069] Continue to refer to Figure 3 In some examples, the white light-emitting unit 130 includes a first blue light-emitting chip 131 and a photoluminescent part 132. The photoluminescent part 132 is disposed on the light-emitting side of the first blue light-emitting chip 131 and is used to convert blue light into white light.

[0070] Understandably, the first blue light-emitting chip 131 can emit blue light, and the blue light emitted by the first blue light-emitting chip 131 can illuminate the photoluminescent unit 132, which can convert the blue light into white light.

[0071] For example, the first blue light-emitting chip 131 may include a chip body and pins. The chip body is used to emit blue light, and the pins are disposed on one side of the chip body and connected to the chip body. The pins are used to connect to the substrate 110. The pins may include anode pins and cathode pins, which are spaced apart.

[0072] The photoluminescent part 132 may cover the light-emitting chip body of the first blue light-emitting chip 131, or the photoluminescent part 132 may be disposed on the side of the light-emitting chip body of the first blue light-emitting chip 131 away from the pins of the first blue light-emitting chip 131.

[0073] For example, the photoluminescent part 132 may include a photoluminescent body and conversion particles. The conversion particles are disposed within the photoluminescent body and are used to convert blue light into white light. The conversion particles may include at least one of phosphor and yttrium aluminum garnet (YAG) powder. The embodiments of this application do not further limit the specific form of the conversion particles or the concentration of the conversion particles within the photoluminescent body.

[0074] Continue to refer to Figure 3In some examples, the red-green-blue light-emitting unit 140 is disposed along a first direction X on one side of the white light-emitting unit 130. The red-green-blue light-emitting unit 140 includes a plurality of light-emitting chips 141, which include a red light-emitting chip 1411, a green light-emitting chip 1412, and a second blue light-emitting chip 1413. The red light-emitting chip 1411, the green light-emitting chip 1412, and the second blue light-emitting chip 1413 are arranged along the first direction X. That is, the red light-emitting chip 1411, the green light-emitting chip 1412, and the second blue light-emitting chip 1413 in the white light-emitting unit 130 and the red-green-blue light-emitting unit 140 can be arranged along the first direction X.

[0075] Understandably, the red light-emitting chip 1411 can emit red light, the green light-emitting chip 1412 can emit green light, and the second blue light-emitting chip 1413 can emit blue light.

[0076] Figure 4 This is a schematic diagram showing the arrangement of multiple light-emitting chips in a red, green, and blue light-emitting unit provided in some embodiments of this application. Figure 5 This is a schematic diagram showing the arrangement of multiple light-emitting chips in a red, green, and blue light-emitting unit provided in other embodiments of this application.

[0077] For example, such as Figure 3 , Figure 4 , Figure 5 As shown, the number of light-emitting chips 141 can be three, four, five, or six, etc. When the number of light-emitting chips 141 is three, the three light-emitting chips 141 include a red light-emitting chip 1411, a green light-emitting chip 1412, and a second blue light-emitting chip 1413.

[0078] When the number of light-emitting chips 141 is four, such as Figure 4 As shown, the four light-emitting chips 141 may include two red light-emitting chips 1411, one green light-emitting chip 1412, and one second blue light-emitting chip 1413. Alternatively, the four light-emitting chips 141 may also include two green light-emitting chips 1412, one red light-emitting chip 1411, and one second blue light-emitting chip 1413. Or, the four light-emitting chips 141 may further include two second blue light-emitting chips 1413, one red light-emitting chip 1411, and one green light-emitting chip 1412.

[0079] When the number of light-emitting chips 141 is five, such as Figure 5As shown, the five light-emitting chips 141 may include two red light-emitting chips 1411, two green light-emitting chips 1412, and one second blue light-emitting chip 1413. Alternatively, the five light-emitting chips 141 may also include two red light-emitting chips 1411, two second blue light-emitting chips 1413, and one green light-emitting chip 1412. Or, the five light-emitting chips 141 may also include two green light-emitting chips 1412, two second blue light-emitting chips 1413, and one red light-emitting chip 1411.

[0080] When the number of light-emitting chips 141 is six, such as Figure 3 As shown, the six light-emitting chips 141 may include two red light-emitting chips 1411, two green light-emitting chips 1412, and two second blue light-emitting chips 1413. Alternatively, the six light-emitting chips 141 may also include three red light-emitting chips 1411, one green light-emitting chip 1412, and one second blue light-emitting chip 1413. Or, the six light-emitting chips 141 may also include other numbers of red light-emitting chips 1411, green light-emitting chips 1412, and second blue light-emitting chips 1413.

[0081] Understandably, the red, green, and blue light-emitting unit 140 may also include other numbers of light-emitting chips 141, and the embodiments of this application do not further limit this. The number of red light-emitting chips 1411, green light-emitting chips 1412, and second blue light-emitting chips 1413 may be equal or unequal.

[0082] In some examples, such as Figure 3 As shown, along the first direction X, at least one of the red light-emitting chip 1411 and the green light-emitting chip 1412 is disposed between the second blue light-emitting chip 1413 and the first blue light-emitting chip 131.

[0083] Understandably, the first blue light-emitting chip 131 can be the first blue light-emitting chip 131 in the light-emitting unit 120 to which the second blue light-emitting chip 1413 belongs, or the first blue light-emitting chip 131 can also be the first blue light-emitting chip 131 in the light-emitting unit 120 adjacent to the second blue light-emitting chip 1413.

[0084] For example, when there are two red light-emitting chips 1411, the two red light-emitting chips 1411 can be respectively disposed on both sides of the second blue light-emitting chip 1413, so that the red light-emitting chips 1411 can be disposed between the second blue light-emitting chip 1413 and the first blue light-emitting chip 131.

[0085] When there are two green light-emitting chips 1412, the two green light-emitting chips 1412 can be respectively disposed on both sides of the second blue light-emitting chip 1413, so that the green light-emitting chip 1412 can be disposed between the second blue light-emitting chip 1413 and the first blue light-emitting chip 131.

[0086] When there is one red light-emitting chip 1411 and one green light-emitting chip 1412, the red light-emitting chip 1411 and the green light-emitting chip 1412 can be respectively disposed on both sides of the second blue light-emitting chip 1413, so that both the red light-emitting chip 1411 and the green light-emitting chip 1412 can be disposed between the second blue light-emitting chip 1413 and the first blue light-emitting chip 131.

[0087] Understandably, along the first direction X, at least one of the red light-emitting chip 1411 and the green light-emitting chip 1412 is disposed between the second blue light-emitting chip 1413 and the first blue light-emitting chip 131, so that at least one of the red light-emitting chip 1411 and the green light-emitting chip 1412 can isolate the second blue light-emitting chip 1413 and the white light-emitting unit 130, reducing the risk of blue light emitted by the second blue light-emitting chip 1413 irradiating the photoluminescent part 132 of the white light-emitting unit 130, that is, reducing the impact of the blue light emitted by the second blue light-emitting chip 1413 on the white light-emitting unit 130, so that the white light-emitting unit 130 can emit white light of a set intensity, which is beneficial to improving the display performance of the display device 400.

[0088] Figure 6 This is a schematic diagram showing the arrangement of multiple light-emitting chips in a red, green, and blue light-emitting unit provided in some embodiments of this application.

[0089] For example, the number of second blue light-emitting chips 1413 can be one, or the number of second blue light-emitting chips 1413 can be at least two.

[0090] When the number of the second blue light-emitting chips 1413 is at least two, such as Figure 3 As shown, at least two second blue light-emitting chips 1413 can be arranged adjacent to each other, or, as... Figure 6 As shown, at least two second blue light-emitting chips 1413 can be arranged at intervals.

[0091] like Figure 6As shown, when at least two second blue light-emitting chips 1413 are spaced apart, a portion (one, two, or more) of the red light-emitting chips 1411 and the green light-emitting chips 1412 can be located between the multiple second blue light-emitting chips 1413, and another portion (one, two, or more) of the red light-emitting chips 1411 and the green light-emitting chips 1412 can be located between the second blue light-emitting chips 1413 and the first blue light-emitting chip 131.

[0092] In some examples, the number of red light-emitting chips 1411 can be at least two, and the number of green light-emitting chips 1412 can be at least two.

[0093] Continue to refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 For example, the red-green-blue light-emitting unit 140 may include at least four light-emitting chips 141, and along the first direction X, two of the at least four light-emitting chips 141 that emit the same color are symmetrically arranged about the axis Q of the red-green-blue light-emitting unit 140.

[0094] Taking the red light-emitting chip 1411 as an example, such as Figure 4 As shown, when an even number (e.g., two) of the at least four light-emitting chips 141 are red light-emitting chips 1411, the two red light-emitting chips 1411 are symmetrical about the axis Q of the red-green-blue light-emitting unit 140. Figure 6 As shown, when at least four light-emitting chips 141 include an odd number (e.g., three) of red light-emitting chips 1411, two of the three red light-emitting chips 1411 are symmetrical about the axis Q of the red-green-blue light-emitting unit 140.

[0095] Understandably, symmetrically arranging two of the four light-emitting chips 141 with the same emitting color about the axis Q of the red, green and blue light-emitting unit 140 can improve the uniformity of the arrangement of light-emitting chips 141 of different colors in the red, green and blue light-emitting unit 140, which is beneficial to improving the mixing effect of red, green and blue light, reducing the risk of color separation in the light-emitting unit 120, thereby improving the display performance of the display device 400.

[0096] In other examples, the red, green and blue light-emitting unit 140 may include at least four light-emitting chips 141. Along the first direction X, two of the four light-emitting chips 141 that emit the same color may also be asymmetrically arranged about the axis Q of the red, green and blue light-emitting unit 140 to meet different light-emitting display requirements.

[0097] In some examples, such as Figure 3As shown, there are two second blue light-emitting chips 1413, which are arranged adjacent to each other. This increases the intensity of the blue light emitted by the lamp panel 100.

[0098] In some examples, such as Figure 3 As shown, the two second blue light-emitting chips 1413 include a first second blue light-emitting chip 1413a and a second second blue light-emitting chip 1413b, which are arranged adjacent to each other.

[0099] Continue to refer to Figure 3 In some examples, there are two green light-emitting chips 1412, including a first green light-emitting chip 1412a and a second green light-emitting chip 1412b, which are disposed on both sides of a first second blue light-emitting chip 1413a and a second second blue light-emitting chip 1413b.

[0100] There are two red light-emitting chips 1411, including a first red light-emitting chip 1411a and a second red light-emitting chip 1411b. The first red light-emitting chip 1411a and the second red light-emitting chip 1411b are disposed on both sides of the first green light-emitting chip 1412a and the second green light-emitting chip 1412b.

[0101] Understandably, two green light-emitting chips 1412 are respectively disposed on both sides of two second blue light-emitting chips 1413, and two red light-emitting chips 1411 are respectively disposed on both sides of two green light-emitting chips 1412, so that the multiple light-emitting chips 141 in the red-green-blue light-emitting unit 140 can be arranged in the order of red light-emitting chip 1411 (e.g., first red light-emitting chip 1411a), green light-emitting chip 1412 (e.g., first green light-emitting chip 1412a), second blue light-emitting chip 1413 (e.g., first second blue light-emitting chip 1413a), second blue light-emitting chip 1413 (e.g., first second blue light-emitting chip 1413a), second blue light-emitting chip 1413a, second green light-emitting chip 1412 ... For example, the second blue light-emitting chip 1413b), the green light-emitting chip 1412 (e.g., the second green light-emitting chip 1412b), and the red light-emitting chip 1411 (e.g., the second red light-emitting chip 1411b) are arranged in sequence, that is, the two red light-emitting chips 1411, the two green light-emitting chips 1412, and the two second blue light-emitting chips 1413 can be symmetrically arranged with respect to the axis Q of the red-green-blue light-emitting unit 140, which is beneficial to improve the mixing effect of red, green and blue light in the red-green-blue light-emitting unit 140, thereby improving the display performance of the display device 400.

[0102] The first red light-emitting chip 1411a and the first green light-emitting chip 1412a are disposed between the two second blue light-emitting chips 1413 and the white light-emitting unit 130. The second red light-emitting chip 1411b and the second green light-emitting chip 1412b are disposed between the two second blue light-emitting chips 1413 and the white light-emitting unit 130 of the other light-emitting unit 120. This allows the red light-emitting chip 1411 and the green light-emitting chip 1412 to isolate the second blue light-emitting chip 1413 and the white light-emitting unit 130, reducing the risk of blue light emitted by the second blue light-emitting chip 1413 irradiating the photoluminescent part 132. This allows the white light-emitting unit 130 to emit white light of a set intensity, which is beneficial to improving the display performance of the display device 400.

[0103] In other examples, the first red light-emitting chip 1411a and the second red light-emitting chip 1411b may be respectively disposed on both sides of the two second blue light-emitting chips 1413, and the first green light-emitting chip 1412a and the second green light-emitting chip 1412b may be respectively disposed on both sides of the two red light-emitting chips 1411.

[0104] In some examples, the wavelength of the blue light emitted by the first blue light-emitting chip 131 is different from the wavelength of the blue light emitted by the second blue light-emitting chip 1413.

[0105] For example, the wavelength of the blue light emitted by the first blue light-emitting chip 131 can be greater than the wavelength of the blue light emitted by the second blue light-emitting chip 1413, or the wavelength of the blue light emitted by the first blue light-emitting chip 131 can be less than the wavelength of the blue light emitted by the second blue light-emitting chip 1413.

[0106] For example, the first blue light-emitting chip 131 emits blue light with a wavelength range of 455 nanometers (nm) to 460 nm, and the second blue light-emitting chip 1413 emits blue light with a wavelength range of 440 nm to 455 nm. Alternatively, the first blue light-emitting chip 131 emits blue light with a wavelength range of 440 nm to 455 nm, and the second blue light-emitting chip 1413 emits blue light with a wavelength range of 455 nm to 460 nm.

[0107] Alternatively, the first blue light-emitting chip 131 and the second blue light-emitting chip 1413 may also emit blue light with wavelengths in other wavelength ranges. The embodiments of this application do not further limit the wavelength range of the blue light emitted by the first blue light-emitting chip 131 and the second blue light-emitting chip 1413.

[0108] Taking the first blue light-emitting chip 131 emitting blue light with a wavelength range of 455nm~460nm and the second blue light-emitting chip 1413 emitting blue light with a wavelength range of 440nm~455nm as an example, when the display requirement is a wider color gamut, the luminous intensity of the first blue light-emitting chip 131 can be controlled to be less than the luminous intensity of the second blue light-emitting chip 1413, so that the light-emitting unit 120 can emit stronger short-wavelength blue light to broaden the color gamut.

[0109] When the display requirement is eye protection, the light intensity of the first blue light-emitting chip 131 can be controlled to be greater than the light intensity emitted by the second blue light-emitting chip 1413, so that the light-emitting unit 120 can emit stronger long-wavelength blue light to achieve the effect of eye protection.

[0110] Understandably, when blue light shines on the photoluminescent unit 132, it can excite red and green light. The red and green light mix to form yellow light, and the yellow light mixes with the blue light, thus enabling the white light-emitting unit 130 to emit white light. In other words, when the wavelength of the blue light emitted by the first blue light-emitting chip 131 is relatively long, the white light emitted by the white light-emitting unit 130 can contain blue light with a relatively long wavelength, thereby protecting the eyes.

[0111] In other words, by setting the wavelength of the blue light emitted by the first blue light-emitting chip 131 to be different from the wavelength of the blue light emitted by the second blue light-emitting chip 1413, the first blue light-emitting chip 131 and the second blue light-emitting chip 1413 can be controlled to emit blue light of different intensities according to different display requirements, thereby improving the applicability of the display device 400.

[0112] For example, the red light-emitting chip 1411 emits red light in the wavelength range of 630nm to 650nm. Alternatively, the red light-emitting chip 1411 may also emit red light in other wavelength ranges. The green light-emitting chip 1412 emits green light in the wavelength range of 500nm to 570nm. Alternatively, the green light-emitting chip 1412 may also emit green light in other wavelength ranges. The embodiments of this application do not further limit the wavelength range of red light emitted by the red light-emitting chip 1411 and the wavelength range of green light emitted by the green light-emitting chip 1412.

[0113] Continue to refer to Figure 3 In some examples, the substrate 110 is strip-shaped, with its length direction parallel to the first direction X, and its width direction parallel to the second direction Y.

[0114] For example, when the backlight module 200 is a direct-lit backlight module, the lamp board 100 may include multiple substrates, and the multiple substrates 110 may be arranged along the second direction Y and the first direction X. When the backlight module 200 is an edge-lit backlight module, the lamp board 100 may include one substrate 110, or it may include multiple substrates 110 arranged along the first direction X.

[0115] In some examples, the long side of the first blue light-emitting chip 131 is parallel to the width direction of the substrate 110, and the short side of the first blue light-emitting chip 131 is parallel to the length direction of the substrate 110. This arrangement helps to reduce the space occupied by the white light-emitting unit 130 in the length direction of the substrate 110.

[0116] At least one light-emitting chip 141 in the red-green-blue light-emitting unit 140 has its long side parallel to the width direction of the substrate 110, and its short side parallel to the length direction of the substrate 110. This arrangement can increase the density of light-emitting chips 141 in the red-green-blue light-emitting unit 140 and help reduce the space occupied by the red-green-blue light-emitting unit 140 in the length direction of the substrate 110.

[0117] In this way, a greater number of light-emitting units 120 can be arranged on the substrate 110 along the first direction of the substrate 110, which can improve the brightness of the lamp panel 100, thereby improving the brightness of the backlight module 200 and improving the display performance of the display device 400.

[0118] For example, the first blue light-emitting chip 131, the red light-emitting chip 1411, the green light-emitting chip 1412, and the second blue light-emitting chip 1413 can all be disposed on the substrate 110 using a flip-chip method. The first blue light-emitting chip 131, the red light-emitting chip 1411, the green light-emitting chip 1412, and the second blue light-emitting chip 1413 can be packaged using a chip-scale package (CSP) method.

[0119] Understandably, the smaller size of the chip packaged using the CSP method is beneficial for increasing the number of the first blue light-emitting chip 131, the red light-emitting chip 1411, the green light-emitting chip 1412, and the second blue light-emitting chip 1413 on the substrate 110, thereby increasing the brightness of the backlight module 200.

[0120] Alternatively, the first blue light-emitting chip 131, the red light-emitting chip 1411, the green light-emitting chip 1412, and the second blue light-emitting chip 1413 can also be packaged using a package on board (POB) method.

[0121] The packaging methods of the first blue light-emitting chip 131, the red light-emitting chip 1411, the green light-emitting chip 1412, and the second blue light-emitting chip 1413 can be the same or different. The embodiments of this application do not further limit the packaging methods of the first blue light-emitting chip 131, the red light-emitting chip 1411, the green light-emitting chip 1412, and the second blue light-emitting chip 1413.

[0122] Figure 7 This is a schematic diagram of the structure of a lamp panel provided in some embodiments of this application. In some examples, such as... Figure 7 As shown, the lamp board 100 also includes a power supply trace 170, which is disposed on the substrate 110. The power supply trace 170 extends along a first direction X and is disposed along a second direction Y on one side of the plurality of light-emitting units 120.

[0123] Understandably, the power supply line 170 is connected to the light-emitting unit 120 and can supply power to the light-emitting unit 120.

[0124] The power trace 170 extends along the first direction X, enabling it to connect with multiple light-emitting units 120 arranged along the first direction X. The power trace 170 is positioned along the second direction Y on one side of the multiple light-emitting units 120, which reduces the mutual interference between the power trace 170 and the light-emitting units 120.

[0125] In some examples, such as Figure 7 As shown, the power trace 170 includes a first power trace 171 and a second power trace 172.

[0126] The first power supply line 171 is connected to the first blue light-emitting chip 131, the second blue light-emitting chip 1413, and the green light-emitting chip 1412. The first power supply line 171 is used to supply power to the first blue light-emitting chip 131, the second blue light-emitting chip 1413, and the green light-emitting chip 1412.

[0127] The second power supply line 172 is connected to the red light-emitting chip 1411, and the second power supply line 172 is used to supply power to the red light-emitting chip 1411.

[0128] For example, the first power trace 171 and the second power trace 172 can be spaced apart along the second direction Y.

[0129] The first power supply trace 171 supplies power to the blue light-emitting chips (including the first blue light-emitting chip 131 and the second blue light-emitting chip 1413) and the green light-emitting chip 1412, while the second power supply trace 172 supplies power to the red light-emitting chip 1411. This reduces the mutual interference between the power supply of the blue and green light-emitting chips 1412 and the power supply of the red light-emitting chip 1411. Furthermore, the blue and green light-emitting chips 1412 are powered through the same power supply trace 170 (i.e., the first power supply trace 171), which reduces the number of power supply traces 170, simplifies the wiring structure of the lamp board 100, reduces the space occupied by the power supply traces 170 on the substrate 110, and facilitates the miniaturization of the substrate 110.

[0130] In other examples, power trace 170 may also include a third power trace. The first power trace 171 is connected to the blue LED chip (including the first blue LED chip 131 and the second blue LED chip 1413) to power the blue LED chip. The third power trace is connected to the green LED chip 1412 to power the green LED chip 1412.

[0131] This configuration allows the blue and green LED chips 1412 to be powered separately, which helps to reduce the mutual interference between the blue and green LED chips 1412.

[0132] Continue to refer to Figure 7 In some examples, the number of red light-emitting chips 1411 is at least two, and the at least two red light-emitting chips 1411 are connected in series and connected to the second power supply line 172; and / or, the number of green light-emitting chips 1412 is at least two, and the at least two green light-emitting chips 1412 are connected in series and connected to the first power supply line 171; and / or, the number of second blue light-emitting chips 1413 is at least two, and the at least two second blue light-emitting chips 1413 are connected in series and connected to the first power supply line 171.

[0133] Understandably, at least two red LEDs 1411 are connected in series and to the second power supply trace 172, so that the at least two red LEDs 1411 do not need to be individually connected to the second power supply trace 172. At least two green LEDs 1412 are connected in series and to the first power supply trace 171, so that the at least two green LEDs 1412 do not need to be individually connected to the first power supply trace 171. At least two second blue LEDs 1413 are connected in series and to the first power supply trace 171, so that the at least two second blue LEDs 1413 do not need to be individually connected to the first power supply trace 171.

[0134] The above connection method simplifies the wiring structure, thereby reducing the space occupied by the wiring on the substrate 110 and facilitating the miniaturization of the substrate 110.

[0135] Continue to refer to Figure 7 In some examples, a plurality of light-emitting units 120 arranged adjacent to each other along the first direction X include a first light-emitting unit 121 and a second light-emitting unit 122.

[0136] The lamp board 100 also includes a driver chip 180, which and the light-emitting unit 120 are disposed on the same side of the substrate 110. The driver chip 180 is used to drive the light-emitting unit 120 to emit light.

[0137] For example, the driver chip 180 can be packaged in a CSP manner to reduce the space occupied by the driver chip 180 on the substrate 110, thereby helping to reduce the size of the substrate 110.

[0138] Understandably, the driver chip 180 is disposed on the substrate 110, which can improve the ease of connection between the driver chip 180 and the light-emitting unit 120.

[0139] like Figure 7 As shown, when at least two red light-emitting chips 1411 are connected in series and to the second power supply line 172, at least two green light-emitting chips 1412 are connected in series and to the first power supply line 171, and at least two second blue light-emitting chips 1413 are connected in series and to the first power supply line 171, the at least two second blue light-emitting chips 1413 connected in series in the first light-emitting unit 121 and the at least two second blue light-emitting chips 1413 connected in series in the second light-emitting unit 122 form a blue light-emitting chip group, which is connected to the first power supply line 171 and the driver chip 180. Similarly, the at least two green light-emitting chips 1412 connected in series in the first light-emitting unit 121 and the at least two green light-emitting chips 1412 connected in series in the second light-emitting unit 122 form a green light-emitting chip group, which is also connected to the first power supply line 171 and the driver chip 180. At least two red light-emitting chips 1411 connected in series in the first light-emitting unit 121 and at least two red light-emitting chips 1411 connected in series in the second light-emitting unit 122 form a red light-emitting chip group, which is connected to the second power supply line 172 and the driver chip 180. White light-emitting units 130 in the first light-emitting unit 121 and the second light-emitting unit 122 are connected in series to form a white light-emitting unit group, which is connected to the first power supply line 171 and the driver chip 180.

[0140] Understandably, the driver chip 180 can drive the light-emitting unit 120 to emit light. For example... Figure 7As shown, in two adjacent light-emitting units 120 arranged along the first direction X, multiple red light-emitting chips 1411 in the two red-green-blue light-emitting units 140 are connected in series to the second power supply line 172 and the driver chip 180; multiple green light-emitting chips 1412 in the two red-green-blue light-emitting units 140 are connected in series to the first power supply line 171 and the driver chip 180; and multiple second blue light-emitting chips 1413 in the two red-green-blue light-emitting units 140 are connected in series to the first power supply line 171 and the driver chip 180.

[0141] Furthermore, in the two adjacent light-emitting units 120 arranged along the first direction X, the two first blue light-emitting chips 131 in the two white light-emitting units 130 are connected in series and then connected to the first power supply line 171 and the driver chip 180.

[0142] By adopting the above configuration, the number of traces on the substrate 110 can be reduced, which helps to simplify the trace structure of the lamp board 100, reduce the space occupied by the traces on the substrate 110, and facilitate the miniaturization of the substrate 110.

[0143] Understandably, multiple light-emitting units 120 connected to the same driver chip 180 can form a lamp area, and the substrate 110 may include multiple lamp areas.

[0144] In other examples, the first blue light-emitting chip 131, the second blue light-emitting chip 1413, the red light-emitting chip 1411, and the green light-emitting chip 1412 in different light-emitting units 120 can also be connected to the power supply line 170 and the driver chip 180 respectively. The embodiments of this application do not further limit this.

[0145] Continue to refer to Figure 7 In some examples, along the second direction Y (i.e. the width direction of the substrate 110), the power supply trace 170 and the driver chip 180 are respectively disposed on both sides of the light-emitting unit 120.

[0146] This configuration allows the light-emitting unit 120 to be positioned in the middle region of the substrate 110 along the second direction Y, improving the light-emitting effect of the lamp board 100 and thus enhancing the display effect of the display device 400. Furthermore, it also improves the ease of connection between the light-emitting unit 120 and the power supply trace 170 and the driver chip 180.

[0147] In some examples, the driver chip 180 is able to detect its own temperature. When its own temperature exceeds a set temperature threshold, the driver chip 180 can reduce the current flowing through at least one of the first blue light-emitting chip 131, the second blue light-emitting chip 1413, the red light-emitting chip 1411, and the green light-emitting chip 1412 to reduce the risk of the light-emitting unit 120 overheating and causing damage to other components (such as the light guide plate 220).

[0148] Figure 8 This is a schematic diagram of the structure of a lamp panel provided in some embodiments of this application. Figure 9 for Figure 8 A magnified schematic diagram of the local structure of region C1. Figure 10 for Figure 9 A magnified schematic diagram of the C11 region.

[0149] In some examples, such as Figure 8 , Figure 9 and Figure 10 As shown, the backlight module 200 also includes a first connection trace 191, a second connection trace 192, and a third connection trace 193.

[0150] The first connection trace 191 includes a main connection trace 1911, a first connection branch trace 1912, and a second connection branch trace 1913. The main connection trace 1911 is connected to the first power supply trace 171. The first connection branch trace 1912 connects the main connection trace 1911 to the blue light-emitting chip group. The second connection branch trace 1913 connects the main connection trace 1911 to the green light-emitting chip group.

[0151] By adopting the above configuration, multiple second blue light-emitting chips 1413 in the blue light-emitting chip group and multiple green light-emitting chips 1412 in the green light-emitting chip group can be connected to the first power supply line 171 respectively, thereby enabling the first power supply line 171 to supply power to the second blue light-emitting chips 1413 and the green light-emitting chips 1412.

[0152] The second connection trace 192 connects the first power supply trace 171 and the white light-emitting unit group. The third connection trace 193 connects the second power supply trace 172 and the red light-emitting chip group.

[0153] In this way, the first power supply line 171 can also supply power to multiple white light-emitting units 130 in the white light-emitting unit group, and the second power supply line 172 can supply power to at least two red light-emitting chips 1411 in the red light-emitting chip group.

[0154] In some examples, such as Figure 9 and Figure 10 As shown, along the second direction Y, the first power supply trace 171 is closer to the light-emitting unit 120 than the second power supply trace 172.

[0155] The first power trace 171 includes multiple power trace segments 1711, which are spaced apart along a first direction. The backlight module 200 also includes a crossover structure 201, which is disposed on the substrate 110 and located between two adjacent power trace segments 1711. The crossover structure 201 connects the two power trace segments 1711 and crosses over the third connection trace 193.

[0156] Understandably, the cross-line structure 201 is disposed on the substrate and crosses the third connection trace 193, so that the third connection trace 193 can be connected to the red light-emitting chip group, thereby reducing the mutual influence between the third connection trace 193 and the first power supply trace 171.

[0157] like Figure 9 As shown, in some examples, the plurality of power trace segments 1711 include a first power trace segment 1711a and a second power trace segment 1711b spaced apart along a first direction.

[0158] One of the first connection trace 191 and the second connection trace 192 is connected to the first power supply trace segment 1711a, and the other of the first connection trace 191 and the second connection trace 192 is connected to the second power supply trace segment 1711b.

[0159] Understandably, one of the first connecting trace 191 and the second connecting trace 192 is connected to the first power supply trace segment 1711a, and the other is connected to the second power supply trace segment 1711b. This can reduce the mutual interference when the first connecting trace 191 supplies power to the second blue light-emitting chip 1413 and the green light-emitting chip 1412, and the second connecting trace 192 supplies power to the white light-emitting unit 130 (the first blue light-emitting chip 131). In addition, it can also reduce the mutual interference between the first connecting trace 191 and the second connecting trace 192, so that the first connecting trace 191 and the second connecting trace 192 do not need to cross, which helps to simplify the wiring structure of the lamp board 100.

[0160] In some examples, such as Figure 7 As shown, the first light-emitting unit 121 and the second light-emitting unit 122 form a light-emitting unit group 120a, and there are multiple light-emitting unit groups 120a. It can be understood that different light-emitting unit groups 120a correspond to different driving chips 180.

[0161] Along the first direction X, the third connecting line 193 is located between two adjacent light-emitting unit groups 120a, and the first connecting line 191 and the second connecting line 192 are located on both sides of the third connecting line 193.

[0162] Understandably, the first connection trace 191, the second connection trace 192, and the third connection trace 193 can all be located between the two light-emitting unit groups 120a, which can reduce the mutual influence between the connection traces and the light-emitting units 120, and enable the connection traces to connect to the white light-emitting unit group, the green light-emitting chip group, and the blue light-emitting chip group.

[0163] The first connecting trace 191 and the second connecting trace 192 are located on both sides of the third connecting trace 193, which can improve the convenience of connection between the first connecting trace 191 and the second connecting trace 192 and the first power supply trace segment 1711a and the second power supply trace segment 1711b. This eliminates the need for the first connecting trace 191, the second connecting trace 192 and the third connecting trace 193 to cross each other, which helps to simplify the wiring structure of the lamp board 100.

[0164] For example, such as Figure 10 As shown, a portion of the first connecting trace 191 can be disposed on the side of the third connecting trace 193 away from the white light-emitting unit 130, and the second connecting trace 192 can be disposed on the side of the third connecting trace 193 close to the white light-emitting unit 130.

[0165] In some examples, along the second direction Y, the anode pin of the first blue light-emitting chip 131 is closer to the power supply trace 170 than the cathode pin of the first blue light-emitting chip 131. The second connection trace 192 is connected to the anode pin of the first blue light-emitting chip 131 in the first light-emitting unit 121.

[0166] Understandably, the anode pin of the first blue light-emitting chip 131 is closer to the power supply trace 170 than the cathode pin of the first blue light-emitting chip 131, so that the second connection trace 192 extends along the second direction Y, thereby connecting the first power supply trace 171 and the anode pin of the first blue light-emitting chip 131, which helps to simplify the structure of the second connection trace 192.

[0167] For example, the cathode pin of the first blue light-emitting chip 131 in the first light-emitting unit 121 is connected to the anode pin of the first blue light-emitting chip 131 in the second light-emitting unit 122, and the cathode pin of the first blue light-emitting chip 131 in the second light-emitting unit 122 is connected to the driver chip 180, so that the driver chip 180 can drive the white light-emitting unit group to emit light.

[0168] Along the second direction Y, the cathode pin of the first red light-emitting chip 1411a is closer to the power supply trace 170 relative to the anode pin of the first red light-emitting chip 1411a, the cathode pin of the first green light-emitting chip 1412a is closer to the power supply trace 170 relative to the anode pin of the first green light-emitting chip 1412a, and the cathode pin of the first second blue light-emitting chip 1413a is closer to the power supply trace 170 relative to the anode pin of the first second blue light-emitting chip 1413a.

[0169] Along the second direction Y, the anode pin of the second red light-emitting chip 1411b is closer to the power supply trace 170 relative to the cathode pin of the second red light-emitting chip 1411b; the anode pin of the second green light-emitting chip 1412b is closer to the power supply trace 170 relative to the cathode pin of the second green light-emitting chip 1412b; and the anode pin of the second blue light-emitting chip 1413b is closer to the power supply trace 170 relative to the cathode pin of the second blue light-emitting chip 1413b.

[0170] The first connecting trace 191 is connected to the anode pin of the first green light-emitting chip 1412a in the first light-emitting unit 121, and to the anode pin of the first second blue light-emitting chip 1413a in the first light-emitting unit 121. The third connecting trace 193 is connected to the anode pin of the first red light-emitting chip 1411a in the first light-emitting unit 121.

[0171] For example, such as Figure 10 As shown, the first connection line 191 can surround a portion of the white light-emitting unit 130, the first connection branch line 1912 can be connected to the anode pin of the first second blue light-emitting chip 1413a in the first light-emitting unit 121, and the second connection branch line 1913 can be connected to the anode pin of the first green light-emitting chip 1412a in the first light-emitting unit 121.

[0172] The cathode pin of the first green light-emitting chip 1412a in the first light-emitting unit 121 can be connected to the anode pin of the second green light-emitting chip 1412b in the first light-emitting unit 121. The cathode pin of the second green light-emitting chip 1412b in the first light-emitting unit 121 can be connected to the anode pin of the first green light-emitting chip 1412a in the second light-emitting unit 122. The cathode pin of the first green light-emitting chip 1412a in the second light-emitting unit 122 can be connected to the anode pin of the second green light-emitting chip 1412b in the second light-emitting unit 122. The cathode pin of the second green light-emitting chip 1412b in the second light-emitting unit 122 can be connected to the driver chip 180, so that the driver chip 180 can drive the green light-emitting unit group to emit light.

[0173] The cathode pin of the first second blue light-emitting chip 1413a in the first light-emitting unit 121 can be connected to the anode pin of the second second blue light-emitting chip 1413b in the first light-emitting unit 121. The cathode pin of the second second blue light-emitting chip 1413b in the first light-emitting unit 121 can be connected to the anode pin of the first second blue light-emitting chip 1413a in the second light-emitting unit 122. The cathode pin of the first second blue light-emitting chip 1413a in the second light-emitting unit 122 can be connected to the anode pin of the second second blue light-emitting chip 1413b in the second light-emitting unit 122. The cathode pin of the second second blue light-emitting chip 1413b in the second light-emitting unit 122 can be connected to the driver chip 180, so that the driver chip 180 can drive the blue light-emitting unit group to emit light.

[0174] For example, such as Figure 10 As shown, the third connection trace 193 can surround a portion of the white light-emitting unit 130 and is connected to the anode pin of the first red light-emitting chip 1411a in the first light-emitting unit 121.

[0175] The cathode pin of the first red light-emitting chip 1411a in the first light-emitting unit 121 can be connected to the anode pin of the second red light-emitting chip 1411b in the first light-emitting unit 121. The cathode pin of the second red light-emitting chip 1411b in the first light-emitting unit 121 can be connected to the anode pin of the first red light-emitting chip 1411a in the second light-emitting unit 122. The cathode pin of the first red light-emitting chip 1411a in the second light-emitting unit 122 can be connected to the anode pin of the second red light-emitting chip 1411b in the second light-emitting unit 122. The cathode pin of the second red light-emitting chip 1411b in the second light-emitting unit 122 can be connected to the driver chip 180, so that the driver chip 180 can drive the red light-emitting chip group to emit light.

[0176] By adopting the above configuration, the structure of the wiring connecting the power supply line 170 and the first blue light-emitting chip 131, the red light-emitting chip 1411, the green light-emitting chip 1412 and the second blue light-emitting chip 1413 can be simplified, and the wiring structure of chips with the same light-emitting color connected in series can be simplified, reducing the space occupied by the wiring on the substrate 110 and facilitating the miniaturization of the substrate 110.

[0177] Refer again Figure 2 In some examples, the backlight module 200 also includes a heat sink 230, which includes a base plate 231 and a side plate 232.

[0178] Taking backlight module 200 as an example, which is an edge-lit backlight module, such as Figure 2As shown, the base plate 231 is disposed on the backlight side of the light guide plate 220. For example, the base plate 231 can be disposed on the side of the light guide plate 220 away from the liquid crystal panel 320, and the side plate 232 is disposed on the side of the lamp plate 100 away from the light guide plate 220.

[0179] For example, the heat sink 230 can be made of metal to achieve heat dissipation. The base plate 231 can be connected to the side plate 232. For example, the base plate 231 and the side plate 232 can be a one-piece molded structure to improve the reliability of their connection.

[0180] Reference Figure 7 In some examples, the substrate 110 includes a substrate body 111 and a protrusion 112. Along the second direction Y (i.e. the width direction of the substrate 110), the protrusion 112 is disposed on one side of the substrate body 111 and connected to the substrate body 111.

[0181] For example, the protrusion 112 and the substrate body 111 can be an integrally formed structure to improve the connection reliability between the two.

[0182] Continue to refer to Figure 7 The lamp board 100 also includes a wiring terminal 202. The wiring terminal 202 and the light-emitting unit 120 are disposed on the same side of the substrate 110, and the wiring terminal 202 is disposed on the protrusion 112. The wiring terminal 202 is connected to the power supply line 170.

[0183] Understandably, the terminal block 202 may include multiple pins for connecting to an external power supply device, so that the external power supply device can supply power to the power line 170 through the terminal block 202, thereby enabling the light-emitting unit 120 to emit light.

[0184] In some examples, a clearance groove (not shown in the figure) is formed on the surface of the base plate 231 facing the light guide plate 220, and at least a portion of the terminal block 202 is embedded in the clearance groove along the second direction Y (i.e. the width direction of the substrate 110).

[0185] Understandably, at least a portion of the terminal block 202 is embedded in the clearance groove in the second direction Y, so that the terminal block 202 and the base plate 231 can share space, reducing the width of the backlight module 200 in the second direction Y, which is beneficial to achieving a thinner and lighter display device 400.

[0186] In some examples, terminal 202 includes pins that connect to power trace 170 and are capable of connecting to external power supply components.

[0187] For example, there can be multiple pins, and these multiple pins can be arranged along a first direction X. These multiple pins may include a first pin and a second pin. The first pin can be connected to a first power supply trace 171, and the second pin can be connected to a second power supply trace 172.

[0188] In some examples, the number of first pins can be greater than the number of second pins to increase the current-carrying capacity of the first pins, thereby increasing the current flowing through the first power supply trace 171. Alternatively, the number of first pins can be less than the number of second pins to increase the current-carrying capacity of the second pins, thereby increasing the current flowing through the second power supply trace 172. Or, the number of first pins and the number of second power supply pins can be equal.

[0189] Refer again Figure 2 For example, the display panel 300 may also include a back panel 310, which includes a first sub-panel 311 and a second sub-panel 312. The first sub-panel 311 may be disposed on the side of the base plate 231 away from the light guide plate 220, and the second sub-panel 312 may be disposed on the side of the side plate 232 away from the lamp plate 100.

[0190] The first sub-board 311 and the second sub-board 312 are connected. For example, the first sub-board 311 and the second sub-board 312 can be an integrally formed structure to improve the connection reliability between the first sub-board 311 and the second sub-board 312.

[0191] Understandably, the backplate 310 protects the backlight module 200. For example, the backplate 310 may be made of metal to improve its mechanical strength. Alternatively, the backplate 310 may be made of non-metallic material; the embodiments of this application do not further limit the material of the backplate 310.

[0192] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or as many of the technical features as possible; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A backlight module, characterized in that, include: Light guide plate; A light panel, disposed on the light-incident side of the light guide plate, is used to emit light to the light guide plate to provide backlight for the liquid crystal panel. The light panel includes: substrate; A light-emitting unit is disposed on one side of the substrate along the thickness direction of the substrate, and a plurality of light-emitting units are arranged sequentially along a first direction. The light-emitting unit includes white light-emitting units and red, green and blue light-emitting units arranged sequentially. The white light-emitting unit includes a first blue light-emitting chip and a photoluminescent part. The photoluminescent part is disposed on the light-emitting side of the first blue light-emitting chip and is used to convert blue light into white light. The red, green, and blue light-emitting unit is disposed on one side of the white light-emitting unit along a first direction. The red, green, and blue light-emitting unit includes multiple light-emitting chips, including a red light-emitting chip, a green light-emitting chip, and a second blue light-emitting chip. The red light-emitting chip, the green light-emitting chip, and the second blue light-emitting chip are arranged along the first direction. Along the first direction, at least one of the red light-emitting chip and the green light-emitting chip is disposed between the second blue light-emitting chip and the first blue light-emitting chip; A power trace is disposed on the substrate, the power trace extends along a first direction, and the power trace is disposed on one side of a plurality of light-emitting units along a second direction, the second direction being perpendicular to the first direction. The power trace includes: A first power trace and a second power trace, wherein the first power trace is connected to the first blue light-emitting chip, the second blue light-emitting chip and the green light-emitting chip, and the first power trace is used to supply power to the first blue light-emitting chip, the second blue light-emitting chip and the green light-emitting chip, the first power trace is disposed between the second power trace and the plurality of light-emitting units, and the first power trace is provided with a cross-line structure, and the second power trace is connected to the red light-emitting chip, and the second power trace is used to supply power to the red light-emitting chip; The first connection trace connects the first power trace, the second blue light-emitting chip, and the green light-emitting chip. The second connection trace connects the first power trace and the first blue light-emitting chip; The third connection trace connects the second power supply trace and the red light-emitting chip; The crossover structure crosses over the third connecting trace.

2. The backlight module according to claim 1, characterized in that, The number of the red light-emitting chips is at least two, and the at least two red light-emitting chips are connected in series and connected to the second power supply line; and / or, The number of the green light-emitting chips is at least two, and the at least two green light-emitting chips are connected in series and connected to the first power supply line; and / or, The number of the second blue light-emitting chips is at least two, and the at least two second blue light-emitting chips are connected in series and connected to the first power supply line.

3. The backlight module according to claim 2, characterized in that, The plurality of light-emitting units arranged adjacent to each other along the first direction include a first light-emitting unit and a second light-emitting unit; The light panel also includes: The driving chip and the light-emitting unit are disposed on the same side of the substrate; In the case that at least two of the red light-emitting chips are connected in series and connected to the second power supply line, at least two of the green light-emitting chips are connected in series and connected to the first power supply line, and at least two of the second blue light-emitting chips are connected in series and connected to the first power supply line, the at least two second blue light-emitting chips connected in series in the first light-emitting unit and the at least two second blue light-emitting chips connected in series in the second light-emitting unit form a blue light-emitting chip group, and the blue light-emitting chip group is connected to the first power supply line and the driver chip; At least two green light-emitting chips connected in series in the first light-emitting unit and at least two green light-emitting chips connected in series in the second light-emitting unit are connected in series to form a green light-emitting chip group, and the green light-emitting chip group is connected to the first power supply line and the driver chip; At least two red light-emitting chips connected in series in the first light-emitting unit and at least two red light-emitting chips connected in series in the second light-emitting unit are connected in series to form a red light-emitting chip group, and the red light-emitting chip group is connected to the second power supply line and the driver chip; The white light-emitting unit in the first light-emitting unit and the white light-emitting unit in the second light-emitting unit are connected in series to form a white light-emitting unit group, which is connected to the first power supply line and the driver chip.

4. The backlight module according to claim 3, characterized in that... The first connection trace includes: The main connection line is connected to the first power supply trace; The first connecting branch line connects the main connecting line and the blue light-emitting chip group; The second connecting branch line connects the main connecting line and the green light-emitting chip group; The second connection trace connects the first power trace and the white light-emitting unit group; The third connection trace connects the second power trace and the red light-emitting chip group.

5. The backlight module according to claim 3, characterized in that, The first power trace includes multiple power trace segments, which are spaced apart along the first direction. The crossover structure is disposed on the substrate and located between two adjacent power trace segments. The crossover structure connects the two power trace segments and crosses the third connection trace.

6. The backlight module according to claim 5, characterized in that, The plurality of power trace segments include a first power trace segment and a second power trace segment that are spaced apart along the first direction. One of the first connection trace and the second connection trace is connected to the first power trace segment, and the other of the first connection trace and the second connection trace is connected to the second power trace segment; The first light-emitting unit and the second light-emitting unit form a light-emitting unit group, and there are multiple light-emitting unit groups. Along the first direction, the third connecting trace is located between two adjacent light-emitting unit groups, and the first connecting trace and the second connecting trace are located on both sides of the third connecting trace.

7. The backlight module according to claim 1, characterized in that, The number of the second blue light-emitting chips is two, and the two second blue light-emitting chips are arranged adjacent to each other.

8. The backlight module according to claim 7, characterized in that, The two second blue light-emitting chips include a first second blue light-emitting chip and a second second blue light-emitting chip, wherein the first second blue light-emitting chip and the second second blue light-emitting chip are arranged adjacent to each other; The number of green light-emitting chips is two, and the two green light-emitting chips include a first green light-emitting chip and a second green light-emitting chip. The first green light-emitting chip and the second green light-emitting chip are disposed on both sides of the first second blue light-emitting chip and the second second blue light-emitting chip. The number of red light-emitting chips is two, including a first red light-emitting chip and a second red light-emitting chip, which are disposed on both sides of the first green light-emitting chip and the second green light-emitting chip.

9. The backlight module according to any one of claims 1 to 8, characterized in that, The wavelength of the blue light emitted by the first blue light-emitting chip is different from the wavelength of the blue light emitted by the second blue light-emitting chip.

10. A display device, characterized in that, include: The backlight module as described in any one of claims 1 to 9; A liquid crystal panel, wherein the liquid crystal panel is disposed in the light-emitting direction of the light guide plate of the backlight module.

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