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 and a red-green-blue light emitting unit. 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 is arranged on one side of the white light emitting unit along a first direction, and comprises at least four light emitting chips, including 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, and two light emitting chips with the same light emitting color are symmetrically arranged about an axis of the red-green-blue light emitting unit. Embodiments of the present application can improve the light mixing uniformity of the light emitting unit and reduce the influence of the second blue light emitting chip on the white light emitting unit.

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 is capable of emitting white light, and the red, green and blue light-emitting units are capable of emitting red, green and blue light, respectively. The white light-emitting unit may include a blue light-emitting chip and a photoluminescent unit, which is capable of converting the blue light emitted by the blue light-emitting chip into white light.

[0003] Normally, the blue light emitted by the red, green, and blue light-emitting units can easily reach the photoluminescent unit, which then converts the blue light into white light, affecting the display effect of the display device. Summary of the Invention

[0004] The embodiments of this application provide a backlight module and a display device that can reduce the impact of blue light emitted by the second blue light-emitting chip on the white light-emitting unit, and also reduce the risk of color separation of the light-emitting unit.

[0005] 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 and light-emitting units. The light-emitting units are disposed on one side of the substrate along the thickness direction of the substrate, and the number of light-emitting units is multiple. The light-emitting units include 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, the photoluminescent part is disposed on the light-emitting side of the first blue light-emitting chip, and the photoluminescent part 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 the red-green-blue light-emitting units include at least four light-emitting chips, the at least four light-emitting chips are arranged along the first direction, and the at least four light-emitting chips include a red light-emitting chip, a green light-emitting chip, and a second blue light-emitting chip. 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, and two light-emitting chips of the same color are symmetrically arranged about the axis of the red-green-blue light-emitting units.

[0006] In the embodiments of this application, the light-emitting unit includes a white light-emitting unit and red-green-blue light-emitting units. This allows the white light-emitting unit to compensate for the intensity of red and green light, improving the overall luminous efficiency of the light-emitting unit. This enables the display device to have a wider color gamut and higher brightness, thus enhancing the display performance. Furthermore, the red-green-blue light-emitting unit includes at least four light-emitting chips, which can increase the intensity of at least one of the red, green, and blue light, thereby improving the brightness of the light panel.

[0007] 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.

[0008] Furthermore, along the first direction, at least two of the four light-emitting chips with the same emitting color are symmetrically arranged about the axis of the red, green and blue light-emitting unit. This can improve the uniformity of the arrangement of light-emitting chips of different colors in the red, green and blue light-emitting unit, which is beneficial to improve the mixing effect of red, green and blue light, reduce the risk of color separation of the light-emitting unit, and thus improve the display performance of the display device.

[0009] In some possible implementations, the lamp panel further includes a first baffle, which is disposed on the same side of the substrate as the light-emitting unit, and the first baffle extends along a first direction to limit the light emission direction of the light-emitting unit. There are two first baffles, which are disposed on both sides of the plurality of light-emitting units along a second direction perpendicular to the first direction.

[0010] Two first dams are set on both sides of multiple light-emitting units along the second direction, so that the two first dams can reflect the light emitted by the light-emitting units to the area near the light-emitting units, thereby increasing the brightness of the area near the light-emitting units and improving the light utilization rate of the lamp panel.

[0011] In some possible implementations, the light panel also includes a second baffle, which is disposed on the same side of the substrate as the light-emitting unit. The second baffle is used to limit the light emission direction of the light-emitting unit. Along the first direction, the second baffle is located between the white light-emitting unit and the red, green and blue light-emitting units.

[0012] This configuration reduces the risk of blue light emitted by the red, green, and blue light-emitting units illuminating the photoluminescent part, allowing the white light-emitting unit to emit white light of a set intensity, which helps improve the display performance of the display device.

[0013] In some possible implementations, the first dam protrudes from the light-emitting unit and the second dam in a direction perpendicular to the substrate.

[0014] This design not only ensures the light reflection effect of the first barrier, but also allows the first barrier to support other components (such as light guide plates), thus protecting the light-emitting unit.

[0015] In some possible implementations, the lamp panel also includes a protective section that covers the light-emitting unit. The protective section is a transparent structure, and a first dam protrudes from the protective section in a direction perpendicular to the substrate.

[0016] Understandably, the protective section covers the light-emitting unit, enabling the protective section to protect the light-emitting unit and reduce the risk of damage to the light-emitting unit. The first dam protrudes from the protective section, enabling the first dam to protect the protective section and reduce the risk of damage to the protective section caused by friction with other components (such as the light guide plate).

[0017] In some possible implementations, the ratio of the width of the white light-emitting unit to the width of the red, green and blue light-emitting units along the first direction ranges from 0.3 to 1.

[0018] Setting the ratio of the width of the white light-emitting unit to the width of the red, green, and blue light-emitting units to a range of 0.3 to 1 avoids the ratio being too small (e.g., less than 0.3), ensuring the width of the white light-emitting unit, thereby ensuring the luminous intensity of the white light-emitting unit and improving the luminous efficiency of the light panel.

[0019] In addition, setting the ratio of the width of the white light-emitting unit to the width of the red, green and blue light-emitting units to a range of 0.3 to 1 can also prevent the ratio from being too large (e.g., greater than 1), ensuring the width of the red, green and blue light-emitting units, thereby ensuring the luminous intensity of the red, green and blue light-emitting units, which is beneficial for widening the color gamut of the display device.

[0020] In some possible implementations, there are two second blue light-emitting chips, arranged adjacent to each other. Along the first direction, the distance between the center of the second blue light-emitting chip closest to the white light-emitting unit and the center of the white light-emitting unit is a first distance. The distance between the centers of any two adjacent light-emitting chips in the red, green, and blue light-emitting units is a second distance. The ratio of the first distance to the second distance ranges from 4 to 8.

[0021] Understandably, setting the number of second blue light-emitting chips to two can enhance the intensity of the blue light emitted by the light-emitting unit.

[0022] Setting the ratio of the first distance to the second distance to a range of 4 to 8 can avoid the ratio of the first distance to the second distance being too small (e.g., less than 4), which means avoiding the first distance being too small. This reduces the risk of the blue light emitted by the second blue light-emitting chip illuminating the photoluminescent part, allowing 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.

[0023] In addition, setting the ratio of the first distance to the second distance to a range of 4 to 8 can also avoid the ratio of the first distance to the second distance being too large (for example, greater than 8), which means avoiding the second distance being too small, thus reducing the mutual influence between two light-emitting chips that are set up in any adjacent positions in the red, green and blue light-emitting units.

[0024] In some possible implementations, there are two green light-emitting chips, one on each side of the two second blue light-emitting chips. Similarly, there are two red light-emitting chips, one on each side of the two green light-emitting chips.

[0025] Two green light-emitting chips are respectively positioned on either side of the two second blue light-emitting chips, and two red light-emitting chips are respectively positioned on either side of the two green light-emitting chips. This allows the multiple light-emitting chips in the red-green-blue light-emitting unit to be arranged in the order of red light-emitting chip, green light-emitting chip, second blue light-emitting chip, second blue light-emitting chip, green light-emitting chip, and 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 are symmetrically positioned with respect to the axis of the red-green-blue light-emitting unit. This 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.

[0026] Understandably, a red light-emitting chip and a green light-emitting chip can be disposed between two second blue light-emitting chips and a white light-emitting unit, and another red light-emitting chip and another green light-emitting chip can be disposed between two second blue light-emitting chips and the white light-emitting unit of other light-emitting units. This allows the red and green light-emitting chips to isolate the second blue light-emitting unit and the white light-emitting unit, reducing the risk of blue light emitted by the second blue light-emitting chip irradiating the photoluminescent part, and enabling 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.

[0027] In some possible implementations, along the first direction, the distance between the center of the white light-emitting unit and the center of the red light-emitting chip disposed adjacent to the white light-emitting unit is a third distance, which is greater than the second distance.

[0028] Understandably, the red light-emitting chip is closer to the white light-emitting unit than the second blue light-emitting chip. Setting the third distance to be greater than the second distance increases the distance between the second blue light-emitting chip and the white light-emitting unit, reducing the impact of the blue light emitted by the second blue light-emitting chip on the white light-emitting unit. This allows the white light-emitting unit to emit white light of a set intensity, thus improving the display performance of the display device.

[0029] In addition, setting the third distance to be greater than the second distance allows the second distance to be smaller, which is beneficial to increasing the density of light-emitting chips in the red, green and blue light-emitting units.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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

[0034] Figure 1 This is a schematic diagram of the structure of a display device provided in some embodiments of this application;

[0035] Figure 2 This is a schematic diagram of the structure of a display panel provided in some embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the structure of the lamp panel provided in some embodiments of this application;

[0037] 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;

[0038] 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;

[0039] 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;

[0040] Figure 7 This is a schematic diagram of the structure of a lamp panel provided in some embodiments of this application.

[0041] Explanation of icon numbers:

[0042] 100-Light board, 110-Substrate, 111-Substrate body, 112-Protrusion, 120-Light-emitting unit, 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, 1412-Green light-emitting chip, 1413-Second blue light-emitting chip, 151-First barrier, 152-Second barrier, 170-Power supply trace, 171-First power supply trace, 172-Second power supply trace, 180-Driver chip, 190-Terminal, 200-Backlight module, 220-Light guide plate, 2 30-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-Driver circuit layer, 322-LCD layer, 3221-LCD molecules, 323-Color filter, 400-Display device, 410-Housing, H1-First distance, H2-Second distance, H3-Third distance, H4-Fourth distance, H5-Fifth distance, X-First direction, Y-Second direction, W1-Width of white light-emitting unit 130, W2-Width of red, green and blue light-emitting unit 140, Q-Axis of red, green and blue light-emitting unit 140. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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, which helps to improve the overall luminous efficiency of the light-emitting unit 120, enabling the display device 400 to have a wider color gamut and higher brightness, thus improving the display performance of the display device 400.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] Continue to refer to Figure 3In some examples, the red-green-blue light-emitting unit 140 is disposed on one side of the white light-emitting unit 130 along the first direction X. The red-green-blue light-emitting unit 140 includes at least four light-emitting chips 141, which are arranged along the first direction X. That is, multiple light-emitting chips 141 in the white light-emitting unit 130 and the red-green-blue light-emitting unit 140 can be arranged along the first direction X.

[0073] 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.

[0074] like Figure 3 , Figure 4 , Figure 5 As shown, at least four 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. 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.

[0075] 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.

[0076] When the number of light-emitting chips 141 is five, such as Figure 5 As 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.

[0077] When the number of light-emitting chips 141 is six, such as Figure 3As 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.

[0078] Understandably, the red, green, and blue light-emitting unit 140 may also include a greater number 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.

[0079] Understandably, the red, green and blue light-emitting unit 140 includes at least four light-emitting chips 141, which can increase the intensity of at least one of the red, green and blue light, thereby improving the brightness of the lamp panel 100.

[0080] 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.

[0081] In some examples, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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 the red light-emitting chip 1411 and the green light-emitting chip 1412 can both be disposed between the second blue light-emitting chip 1413 and the first blue light-emitting chip 131.

[0086] For example, the number of second blue light-emitting chips 1413 can be one or more. When the number of second blue light-emitting chips 1413 is multiple, such as... Figure 3 As shown, multiple second blue light-emitting chips 1413 can be arranged adjacent to each other, or, as... Figure 6 As shown, multiple second blue light-emitting chips 1413 can be arranged at intervals.

[0087] like Figure 6 As shown, when multiple 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.

[0088] 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.

[0089] Continue to refer to Figure 3 , Figure 4 , Figure 5 and Figure 6In some examples, along the first direction X, at least two of the four light-emitting chips 141 that emit the same color are symmetrically arranged about the axis Q of the red, green and blue light-emitting unit 140.

[0090] 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 1411 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.

[0091] Understandably, at least two of the four light-emitting chips 141 with the same light-emitting color are symmetrically arranged about the axis Q of the red, green and blue light-emitting unit 140. This 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 conducive to improving the mixing effect of red, green and blue light, reducing the risk of color separation, and thus improving the display performance of the display device 400.

[0092] In other examples, the red-green-blue light-emitting unit 140 may also include three light-emitting chips 141, comprising a red light-emitting chip 1411, a green light-emitting chip 1412, and a second blue light-emitting chip 1413. For example, the red light-emitting chip 1411 and the green light-emitting chip 1412 may be respectively disposed on opposite sides of the second blue light-emitting chip 1413 to isolate the second blue light-emitting chip 1413 from the first blue light-emitting chip 1411.

[0093] In some other examples, the red-green-blue light-emitting unit 140 includes 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 can also be asymmetrically arranged about the axis Q of the red-green-blue light-emitting unit 140 to meet different light-emitting display requirements.

[0094] The embodiments of this application take the red-green-blue light-emitting unit 140 as an example, which includes at least four light-emitting chips 141, at least one of red light-emitting chip 1411 and green light-emitting chip 1412 disposed between the second blue light-emitting chip 1413 and the first blue light-emitting chip 131, and the two light-emitting chips 141 with the same emission color are symmetrically arranged about the axis Q of the red-green-blue light-emitting unit 140. The examples are further illustrated below.

[0095] In some examples, such as Figure 3As shown, there are two second blue light-emitting chips 1413, and the two second blue light-emitting chips 1413 are arranged adjacent to each other.

[0096] There are two green light-emitting chips 1412, which are respectively disposed on both sides of the two second blue light-emitting chips 1413. There are two red light-emitting chips 1411, which are respectively disposed on both sides of the two green light-emitting chips 1412.

[0097] Understandably, setting the number of second blue light-emitting chips 1413 to two can enhance the intensity of blue light emitted by the light-emitting unit 120. Two green light-emitting chips 1412 are respectively disposed on both sides of the two second blue light-emitting chips 1413, and two red light-emitting chips 1411 are respectively disposed on both sides of the 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, green light-emitting chip 1412, second blue light-emitting chip 1413, second blue light-emitting chip 1413, green light-emitting chip 1412, and red light-emitting chip 1411. 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 improving 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.

[0098] Understandably, a red light-emitting chip 1411 and a green light-emitting chip 1412 are disposed between two second blue light-emitting chips 1413 and a first blue light-emitting chip 131, and another red light-emitting chip 1411 and another green light-emitting chip 1412 are disposed between two second blue light-emitting chips 1413 and a first blue light-emitting chip 131 of another 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.

[0099] In other examples, two red light-emitting chips 1411 may be respectively disposed on both sides of two second blue light-emitting chips 1413, and two green light-emitting chips 1412 may be respectively disposed on both sides of two red light-emitting chips 1411.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] In this way, more 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 board 100, thereby improving the brightness of the backlight module 200 and improving the display performance of the display device 400.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] Continue to refer to Figure 3 In some examples, the lamp panel 100 further includes a first baffle 151, which is disposed on the same side of the substrate 110 as the light-emitting unit 120, and the first baffle 151 extends along a first direction X. The first baffle 151 is used to limit the light emission direction of the light-emitting unit 120.

[0119] There are two first dams 151, and the two first dams 151 are arranged on both sides of the multiple light-emitting units 120 along the second direction Y.

[0120] For example, the first dam 151 may include a first dam body and a first reflective layer. The first reflective layer is coated on the side of the first dam body near the light-emitting unit 120, enabling the first dam 151 to reflect light, thereby limiting the light emission direction of the light-emitting unit 120. Alternatively, the first dam 151 may include a first dam body and first reflective particles, with the first reflective particles disposed within the first dam body. The first reflective particles may include metal fragments for reflecting light, thereby limiting the light emission direction of the light-emitting unit 120.

[0121] The material of the first dam body may include silicone or epoxy resin, etc. The embodiments of this application do not further limit the material of the first dam body.

[0122] Understandably, the two first dams 151 are arranged on both sides of the multiple light-emitting units 120 along the second direction Y, so that the two first dams 151 can reflect the light emitted by the light-emitting unit 120 to the area near the light-emitting unit 120, thereby increasing the brightness of the area near the light-emitting unit 120 and improving the light utilization rate of the lamp panel 100.

[0123] For example, along the first direction X, the length of the first barrier 151 can be greater than the length of the multiple light-emitting units 120 arranged together, or the length of the first barrier 151 along the first direction X can be approximately equal to the length of the multiple light-emitting units 120 arranged together. In this way, the light emitted by the light-emitting units 120 arranged at different positions along the first direction X can be reflected by the first barrier 151, thereby improving the light utilization rate of the lamp panel 100.

[0124] Continue to refer to Figure 3 In some examples, the lamp panel 100 also includes a second dam 152, which is disposed on the same side of the substrate 110 as the light-emitting unit 120. The second dam 152 is used to limit the light emission direction of the light-emitting unit 120.

[0125] Along the first direction X, the second dam 152 is located between the white light-emitting unit 130 and the red, green and blue light-emitting unit 140.

[0126] For example, the second dam 152 may include a second dam body and a second reflective layer. The second reflective layer is coated on the side of the second dam body near the light-emitting unit 120, enabling the second dam 152 to reflect light and thus restrict the light emission direction of the light-emitting unit 120. Alternatively, the second dam 152 may include a second dam body and second reflective particles, with the second reflective particles disposed within the second dam body. The second reflective particles may include metal fragments for reflecting light, thereby enabling the second dam 152 to restrict the light emission direction of the light-emitting unit 120.

[0127] The material of the second dam body may include silicone or epoxy resin, etc., and the embodiments of this application do not further limit the material of the second dam body. The material of the second dam body may be the same as or different from the material of the first dam body.

[0128] Along the first direction X, the second barrier 152 is located between the white light-emitting unit 130 and the red-green-blue light-emitting unit 140, which can reduce the risk of blue light emitted by the red-green-blue light-emitting unit 140 shining on the photoluminescent part 132, 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.

[0129] For example, along the second direction Y, the second barrier 152 can be connected to the first barrier 151 to ensure the reflective effect of the second barrier 152 on light and reduce the risk of blue light emitted by the red-green-blue light-emitting unit 140 illuminating the photoluminescent part 132.

[0130] In some examples, in a direction perpendicular to the substrate 110, the first dam 151 protrudes from the light-emitting unit 120 and the second dam 152.

[0131] Understandably, the direction perpendicular to the substrate 110 is the thickness direction of the substrate 110, and the thickness direction of the substrate 110 is perpendicular or approximately perpendicular to the plane containing the first direction X and the second direction Y. That is, the angle between the thickness direction of the substrate 110 and the plane containing the first direction X and the second direction Y can be 90°, 88°, or 89°.

[0132] In the direction perpendicular to the substrate 110, the first dam 151 protrudes from the light-emitting unit 120 and the second dam 152. This not only ensures the light reflection effect of the first dam 151, but also enables the first dam 151 to support other components (such as the light guide plate 220) and protect the light-emitting unit 120.

[0133] For example, in the direction perpendicular to the substrate 110, the second dam 152 may protrude from the light-emitting unit 120 to ensure the light reflection effect of the second dam 152. Alternatively, in the direction perpendicular to the substrate 110, the second dam 152 may be flush with or approximately flush with the light-emitting unit 120 (e.g., white light-emitting unit 130).

[0134] For example, in the direction perpendicular to the substrate 110, the height of the second dam 152 can range from 0.4 mm to 1.5 mm. For instance, in the direction perpendicular to the substrate 110, the height of the second dam 152 can be 0.5 mm, 1 mm, or 1.2 mm, etc. The embodiments of this application do not further limit the value of the height of the second dam 152.

[0135] In some examples, the lamp panel 100 also includes a protective portion (not shown) that covers the light-emitting unit 120, and the protective portion is a transparent structure. In a direction perpendicular to the substrate 110, a first dam 151 protrudes from the protective portion.

[0136] For example, the material of the protective part may include silicone, or the protective part may include other materials. The embodiments of this application do not further limit the material of the protective part.

[0137] The protective section covers the light-emitting unit 120, thereby protecting the light-emitting unit 120 and reducing the risk of damage to the light-emitting unit 120. The protective section is a transparent structure, which can reduce the obstruction of light by the protective section. The first barrier 151 protrudes from the protective section, thereby protecting the protective section and reducing the risk of damage to the protective section caused by scratches from other components (such as the light guide plate 220).

[0138] For example, along the first direction X, the protective portion can be disposed on both sides of the second retaining dam 152. Alternatively, the protective portion can also cover the second retaining dam 152. The embodiments of this application do not further limit the positional relationship between the protective portion and the second retaining dam 152.

[0139] As can be seen from the above, along the first direction X, 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, green light-emitting chip 1412, second blue light-emitting chip 1413, second blue light-emitting chip 1413, green light-emitting chip 1412 and red light-emitting chip 1411.

[0140] In some examples, such as Figure 3 As shown, along the first direction X, the ratio of the width W1 of the white light-emitting unit 130 to the width W2 of the red, green and blue light-emitting unit 140 ranges from 0.3 to 1.

[0141] Understandably, setting the ratio of the width W1 of the white light-emitting unit 130 to the width W2 of the red, green and blue light-emitting unit 140 to a value between 0.3 and 1 can prevent the ratio of the width W1 of the white light-emitting unit 130 to the width W2 of the red, green and blue light-emitting unit 140 from being too small (e.g., less than 0.3), ensuring the width of the white light-emitting unit 130, thereby ensuring the luminous intensity of the white light-emitting unit 130, which is beneficial to improving the luminous efficiency of the lamp board 100.

[0142] Furthermore, by setting the ratio of the width W1 of the white light-emitting unit 130 to the width W2 of the red, green, and blue light-emitting unit 140 to a range of 0.3 to 1, the ratio of the width W1 of the white light-emitting unit 130 to the width W2 of the red, green, and blue light-emitting unit 140 can be avoided from being too large (e.g., greater than 1), thus ensuring the width of the red, green, and blue light-emitting unit 140 and thereby ensuring the luminous intensity of the red, green, and blue light-emitting unit 140, which is beneficial for widening the color gamut of the display device 400.

[0143] For example, along the first direction X, the ratio of the width W1 of the white light-emitting unit 130 to the width W2 of the red-green-blue light-emitting unit 140 can be 0.35, 0.4, 0.5, 0.8 or 0.9, etc. The embodiments of this application do not further limit the value of the ratio of the width W1 of the white light-emitting unit 130 to the width W2 of the red-green-blue light-emitting unit 140.

[0144] For example, along the first direction X, the width W1 of the white light-emitting unit 130 can be 1 mm, the width of the red-green-blue light-emitting unit 140 can be 2.294 mm, and the ratio of the width W1 of the white light-emitting unit 130 to the width W2 of the red-green-blue light-emitting unit 140 is approximately 0.44.

[0145] Alternatively, the width W1 of the white light-emitting unit 130 and the width W2 of the red, green and blue light-emitting unit 140 can also be other values. The embodiments of this application do not further limit the values ​​of the width W1 of the white light-emitting unit 130 and the width W2 of the red, green and blue light-emitting unit 140.

[0146] For example, along the first direction X, the widths of the plurality of light-emitting chips 141 in the red, green, and blue light-emitting units 140 can be equal or approximately equal. For instance, the width of the light-emitting chip 141 along the first direction X can be 0.274 mm.

[0147] Continue to refer to Figure 3 In some examples, among the two second blue light-emitting chips 1413, the distance between the center of the second blue light-emitting chip 1413 closest to the white light-emitting unit 130 and the center of the white light-emitting unit 130 is the first distance H1, and the distance between the centers of any two adjacent light-emitting chips 141 in the red, green and blue light-emitting units 140 is the second distance H2. The ratio of the first distance H1 to the second distance H2 ranges from 4 to 8.

[0148] For example, the distance between the centers of any two adjacent light-emitting chips 141 in the red, green and blue light-emitting units 140 can be equal or approximately equal.

[0149] Understandably, setting the ratio of the first distance H1 to the second distance H2 to a range of 4 to 8 can prevent the ratio of the first distance H1 to the second distance H2 from being too small (for example, less than 4), which also prevents the first distance H1 from being too small. This reduces the risk of the blue light emitted by the second blue light-emitting chip 1413 irradiating the photoluminescent part 132, allowing 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.

[0150] In addition, setting the ratio of the first distance H1 to the second distance H2 to a range of 4 to 8 can also avoid the ratio of the first distance H1 to the second distance H2 being too large (for example, greater than 8), that is, it can also avoid the second distance H2 being too small, thereby reducing the mutual influence between two light-emitting chips 141 that are set up arbitrarily in the red, green and blue light-emitting units 140.

[0151] For example, the ratio of the first distance H1 to the second distance H2 can be 4.5, 5, 6 or 7, etc. The embodiments of this application do not further limit the value of the ratio of the first distance H1 to the second distance H2.

[0152] For example, the first distance H1 can be 2.245 mm, the second distance H2 can be 0.404 mm, and the ratio of the first distance H1 to the second distance H2 is approximately 5.57. Alternatively, the first distance H1 and the second distance H2 can be other values. The embodiments of this application do not further limit the values ​​of the first distance H1 and the second distance H2.

[0153] Continue to refer to Figure 3 In some examples, the distance between the center of the white light-emitting unit 130 and the center of the red light-emitting chip 1411 disposed adjacent to the white light-emitting unit 130 is a third distance H3, which is greater than the second distance H2.

[0154] Understandably, the red light-emitting chip 1411 is closer to the white light-emitting unit 130 than the second blue light-emitting chip 1413. Setting the third distance H3 to be greater than the second distance H2 helps to increase the distance between the second blue light-emitting chip 1413 and the white light-emitting unit 130, reducing the impact of the blue light emitted by the second blue light-emitting chip 1413 on the white light-emitting unit 130, enabling the white light-emitting unit 130 to emit white light of a set intensity, which helps to improve the display performance of the display device 400.

[0155] In addition, setting the third distance H3 to be greater than the second distance H2 allows the second distance H2 to be smaller, which is beneficial to increasing the density of light-emitting chips 141 in the red, green and blue light-emitting unit 140.

[0156] For example, such as Figure 3 As shown, along the first direction X, the distance between the side of the first blue light-emitting chip 131 close to the red light-emitting chip 1411 and the side of the red light-emitting chip 1411 close to the first blue light-emitting chip 131 is the fifth distance H5.

[0157] Along the first direction X, the distance between any two adjacent light-emitting chips 141 in the red, green, and blue light-emitting units 140 is the fourth distance H4. Taking the green light-emitting chip 1412 and the red light-emitting chip 1411 as an example, along the first direction X, the distance between the side of the green light-emitting chip 1412 closest to the red light-emitting chip 1411 and the side of the red light-emitting chip 1411 closest to the green light-emitting chip 1412 is the fourth distance H4.

[0158] Understandably, the fourth distance H4 between any two adjacent light-emitting chips 141 in the plurality of light-emitting chips 141 is equal.

[0159] In some examples, the fifth distance H5 is greater than the fourth distance H4. This increases the distance between the second blue light-emitting chip 1413 and the white light-emitting unit 130, reducing the impact of the blue light emitted by the second blue light-emitting chip 1413 on the white light-emitting unit 130, enabling the white light-emitting unit 130 to emit white light of a set intensity, which helps improve the display performance of the display device 400.

[0160] In addition, it also helps to reduce the distance between any two adjacent light-emitting chips 141 in the red, green and blue light-emitting units 140, thereby increasing the number of light-emitting chips 141 disposed on the substrate 110, which helps to improve the brightness of the backlight module 200.

[0161] Understandably, the fifth distance H5 is greater than the width of the second dam 152 along the first direction X, so that the second dam 152 can be set in the white light-emitting unit 130 and the red, green and blue light-emitting unit 140.

[0162] For example, the fifth distance H5 can be 0.8 mm, and the fourth distance H4 can be 0.13 mm. Alternatively, the fifth distance H5 and the fourth distance H4 can be other values. The embodiments of this application do not further limit the values ​​of the fifth distance H5 and the fourth distance H4.

[0163] 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 line 170, which is disposed on the substrate 110 and connected to the light-emitting unit 120. The power supply line 170 is used to supply power to the light-emitting unit.

[0164] For example, the power trace 170 may include a first power trace 171 and a second power trace 172, which are spaced apart along a second direction Y. For example, the first power trace 171 may be closer to the light-emitting unit 120 relative to the second power trace 172, or the first power trace 171 may be farther away from the light-emitting unit 120 relative to the second power trace 172.

[0165] The first power supply trace 171 can be connected to the first blue LED chip 131, the second blue LED chip 1413, and the green LED chip 1412 to supply power to them. The second power supply trace can be connected to the red LED chip 1411 to supply power to it.

[0166] Understandably, setting the first power supply line 171 to supply power to the blue light-emitting chip (including the first blue light-emitting chip 131 and the second blue light-emitting chip 1413) and the green light-emitting chip 1412 can reduce the number of power supply lines 170 and simplify the wiring structure of the lamp board 100.

[0167] Alternatively, the power supply trace 170 may also include a third power supply trace, which is connected to the green LED chip 1412 to supply power to the green LED chip 1412. This configuration allows the blue LED chip (including the first blue LED chip 131 and the second blue LED chip 1413) and the green LED chip 1412 to be powered separately, which helps to reduce the mutual interference between the blue LED chip and the green LED chip 1412.

[0168] Continue to refer to Figure 7 In some examples, 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 and the light-emitting unit 120 are connected, and the driver chip 180 is used to drive the light-emitting unit 120 to emit light.

[0169] 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.

[0170] 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.

[0171] For example, such as Figure 7As shown, in the same red, green and blue light-emitting unit 140, at least two red light-emitting chips 1411 can be connected in series and then connected to the second power supply line 172 and the driver chip 180; at least two green light-emitting chips 1412 can be connected in series and then connected to the first power supply line 171 and the driver chip 180; and at least two second blue light-emitting chips 1413 can be connected in series and then connected to the first power supply line 171 and the driver chip 180.

[0172] Continue to refer to Figure 7 For example, 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 can be connected in series and then connected 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 can be connected in series and then connected 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 can be connected in series and then connected to the first power supply line 171 and the driver chip 180.

[0173] 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 can be connected in series and then connected to the first power supply line 171 and the driver chip 180.

[0174] By adopting the above configuration, the wiring structure on the substrate 110 can be reduced, which is beneficial to the miniaturization of the substrate 110.

[0175] Alternatively, 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 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.

[0176] In some examples, such as Figure 7 As shown, along the second direction Y (i.e. the width direction of the substrate 110), the power supply line 170 and the driver chip 180 are respectively disposed on both sides of the light-emitting unit 120.

[0177] This configuration allows the light-emitting unit 120 to be located 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.

[0178] In some embodiments, the backlight module 200 further includes a first connection trace to connect the second blue light-emitting chip 1413, the green light-emitting chip 1412 and the first power line 171, a second connection trace to connect the first blue light-emitting chip 131 and the first power line 171, and a third connection trace to connect the red light-emitting chip 1411 and the second power line 172.

[0179] 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).

[0180] 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.

[0181] Taking backlight module 200 as an example, which is an edge-lit backlight module, such as Figure 2 As 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. The side plate 232 is disposed on the side of the lamp plate 100 away from the light guide plate 220.

[0182] 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.

[0183] 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.

[0184] For example, the protrusion 112 and the substrate body 111 can be an integrally formed structure to improve the connection reliability between the two.

[0185] Continue to refer to Figure 7 The lamp board 100 also includes a wiring terminal 190. The wiring terminal 190 and the light-emitting unit 120 are disposed on the same side of the substrate 110, and the wiring terminal 190 is disposed on the protrusion 112. The wiring terminal 190 is connected to the power supply line 170.

[0186] Understandably, terminal block 190 may include multiple pins for connecting to an external power supply device, enabling the external power supply device to supply power to power line 170 through terminal block 190, thereby enabling light-emitting unit 120 to emit light.

[0187] 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 190 is embedded in the clearance groove along the second direction Y (i.e. the width direction of the substrate 110).

[0188] Understandably, at least a portion of the terminal block 190 is embedded in the clearance groove in the second direction Y, so that the terminal block 190 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.

[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 sequentially disposed along a first direction. The light-emitting unit includes: 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. A 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 at least four light-emitting chips, which are arranged along the first direction. The at least four light-emitting chips include two red light-emitting chips, two green light-emitting chips, and two second blue light-emitting chips. Along the first direction, two second blue light-emitting chips are arranged adjacent to each other, one red light-emitting chip and one green light-emitting chip are arranged between the second blue light-emitting chip and the first blue light-emitting chip, another red light-emitting chip and another green light-emitting chip are arranged between the second blue light-emitting chip and the first blue light-emitting chip of another light-emitting unit, and at least two of the four light-emitting chips with the same light-emitting color are arranged symmetrically about the axis of the red, green and blue light-emitting unit; The first barrier and the light-emitting unit are disposed on the same side of the substrate, and the first barrier extends along the first direction. The first barrier is used to restrict the light emission direction of the light-emitting unit. The number of first dams is two, and the two first dams are arranged on both sides of the plurality of light-emitting units along a second direction, the second direction being perpendicular to the first direction.

2. The backlight module according to claim 1, characterized in that, The light panel also includes: The second dam is disposed on the same side of the substrate as the light-emitting unit. The second dam is used to restrict the light emission direction of the light-emitting unit. Along the first direction, the second dam is located between the white light-emitting unit and the red-green-blue light-emitting unit.

3. The backlight module according to claim 2, characterized in that, In a direction perpendicular to the substrate, the first dam protrudes from the light-emitting unit and the second dam.

4. The backlight module according to claim 2, characterized in that, The light panel also includes: A protective portion covers the light-emitting unit. The protective portion is a transparent structure, and the first dam protrudes from the protective portion in a direction perpendicular to the substrate.

5. The backlight module according to claim 1, characterized in that, Along the first direction, the ratio of the width of the white light-emitting unit to the width of the red, green and blue light-emitting units ranges from 0.3 to 1.

6. The backlight module according to claim 1, characterized in that, Along the first direction, the distance between the center of the second blue light-emitting chip closest to the white light-emitting unit and the center of the white light-emitting unit is the first distance, and the distance between the centers of any two adjacent light-emitting chips in the red, green and blue light-emitting units is the second distance; The ratio of the first distance to the second distance ranges from 4 to 8.

7. The backlight module according to claim 6, characterized in that, Along the first direction, the distance between the center of the white light-emitting unit and the center of the red light-emitting chip disposed adjacent to the white light-emitting unit is a third distance, which is greater than the second distance.

8. The backlight module according to any one of claims 1 to 7, 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.

9. A display device, characterized in that, include: The backlight module as described in any one of claims 1 to 8; 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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