Backlight module, display panel and display device
By setting a blue light regulating light-emitting layer and a yellow quantum dot excitation layer around the blue light-emitting layer, the problem of blue light leakage in Mini/Micro LED display panels is solved, achieving narrow bezels and high-quality display effects.
Patent Information
- Application Number
- CN202520545246.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-03-26
AI Technical Summary
In Mini/Micro LED display panels, when Mini/Micro LED blue light chips are used in combination with yellow quantum dot films, the edges of the yellow quantum dot films are cut and fail, resulting in incomplete excitation, which causes blue light leakage and forms blue bands, affecting the display effect.
A blue light regulating layer and a yellow quantum dot excitation layer are set around the blue light emitting layer. The blue light at the edge of the blue light emitting layer is processed by the blue light regulating layer, and white light is generated by combining with the yellow quantum dot excitation layer, thereby reducing or eliminating blue light leakage and achieving a narrow bezel.
It effectively reduces or eliminates blue light leakage at the edges of the backlight module, improves the display effect of the display panel, and achieves a narrow bezel design.
Smart Images
Figure CN223815480U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The embodiment of the utility model relates to display panel technical field, especially a backlight module, display panel and display device. BACKGROUND
[0002] In the era of ultra-high definition display, consumers have higher and higher requirements on the specifications such as picture quality and resolution of display products, so that Mini / Micro LED is used more and more on display panels. At present, Mini / Micro LED blue light chips need to be used in combination with yellow quantum dot films to excite white light, but the edges of the yellow quantum dot film may be cut off and invalid due to cutting edges and other reasons, resulting in incomplete excitation, causing the blue light emitted by the Mini / Micro LED blue light chip to leak, thereby forming a blue band of a certain width, affecting the display effect of the display panel. UTILITY MODEL CONTENT
[0003] The embodiment of the utility model provides a backlight module, display panel and display device to solve the problem of blue light at the edge of the backlight module.
[0004] In the first aspect, the utility model provides a backlight module, which comprises a lamp plate, a blue light emitting layer, a blue light adjusting light emitting layer and a yellow quantum dot excitation layer.
[0005] The blue light emitting layer is arranged on the lamp plate, the blue light adjusting light emitting layer is arranged on the lamp plate around the blue light emitting layer, and the yellow quantum dot excitation layer is arranged on the side of the blue light emitting layer and the blue light adjusting light emitting layer away from the lamp plate.
[0006] Optionally, the blue light emitting layer comprises a plurality of first blue light LED chips arranged in an array.
[0007] Optionally, the blue light adjusting light emitting layer comprises a plurality of first yellow light LED chips.
[0008] The first yellow light LED chips are arranged around the first blue light LED chips, and the first yellow light LED chips and the first blue light LED chips are arranged in an array.
[0009] Optionally, the blue light adjusting light emitting layer comprises a plurality of second yellow light LED chips and a plurality of second blue light LED chips.
[0010] The second yellow light LED chips and the second blue light LED chips are arranged around the first blue light LED chips, and the second yellow light LED chips and the second blue light LED chips are arranged in an array with the first blue light LED chips, and the second yellow light LED chips and the second blue light LED chips are arranged alternately.
[0011] Optionally, the backlight module further comprises a light adjusting driving circuit.
[0012] The light adjusting driving circuit is connected with the blue light adjusting light emitting layer, and the light adjusting driving circuit is used for adjusting the brightness of the blue light adjusting light emitting layer.
[0013] Optionally, the backlight module further comprises a lower diffusion layer.
[0014] The lower diffusion layer is arranged on a side of the yellow quantum dot excitation layer away from the lamp plate.
[0015] Optionally, the backlight module further comprises a prism layer and an upper diffusion layer.
[0016] The prism layer and the upper diffusion layer are arranged on a side of the lower diffusion layer away from the lamp plate.
[0017] Optionally, the backlight module further comprises a back plate.
[0018] The back plate is arranged on a side of the lamp plate away from the blue light emitting layer and the blue light adjusting light emitting layer and an edge side of the lamp plate, the blue light emitting layer, the blue light adjusting light emitting layer, the yellow quantum dot excitation layer, the lower diffusion layer, the prism layer and the upper diffusion layer.
[0019] In a second aspect, the utility model embodiment further provides a display panel, the display panel includes liquid crystal display box and the backlight module that the utility model any embodiment provides.
[0020] In a third aspect, the utility model embodiment further provides a display device, the display device includes the display panel that the utility model any embodiment provides.
[0021] The blue light adjusting light emitting layer arranged around the blue light emitting layer can process the blue light generated at the edge of the blue light emitting layer to generate white light, thereby weakening or eliminating the blue light generated by the blue light emitting layer corresponding to the edge of the yellow quantum dot excitation layer, and further solving the problem of blue light emission at the edge of the backlight module, and realizing narrow frame of the backlight module. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme in the utility model embodiment, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.
[0023] Figure 1 The structure schematic diagram of the backlight module provided in the utility model embodiment is shown in the figure.
[0024] Figure 2 Another structure schematic view of the backlight module provided by the embodiment of the present application is shown in the figure;
[0025] Figure 3 Another structure schematic view of the backlight module provided by the embodiment of the present application is shown in the figure;
[0026] Figure 4 Another structure schematic view of the backlight module provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION
[0027] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiment of the present application will be described clearly and completely in the following with the figures in the embodiment of the present application, obviously, the described embodiment is only a part of the embodiment of the present application, not all the embodiments. Based on the embodiment in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.
[0028] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned figures are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.
[0029] Figure 1 A structure schematic view of the backlight module provided by the embodiment of the present application is shown in the figure, Figure 1 As shown, the backlight module comprises a lamp plate 110, a blue light emitting layer 120, a blue light adjusting light emitting layer 130 and a yellow quantum dot excitation layer 140.
[0030] The blue light emitting layer 120 is arranged on the lamp plate 110, the blue light adjusting light emitting layer 130 is arranged on the lamp plate 110 around the blue light emitting layer 120, and the yellow quantum dot excitation layer 140 is arranged on the side away from the lamp plate 110 of the blue light emitting layer 120 and the blue light adjusting light emitting layer 130.
[0031] The blue light emitting layer 120 can emit blue light. When the yellow quantum dot excitation layer 140 is irradiated by the blue light, the yellow quantum dot excitation layer 140 can absorb the energy carried by the blue light, and then emit yellow light based on the quantum dot material and size characteristics of the yellow quantum dot excitation layer 140. The yellow light is a key element of rich colors, and can be mixed with the remaining blue light that is not absorbed to generate white light.
[0032] In addition, the edges of the yellow quantum dot excitation layer 140 cannot be completely excited due to cutting edges and failures, so that the yellow light emitted by the yellow quantum dot excitation layer 140 is not uniformly mixed with the remaining blue light that is not absorbed, thereby forming a blue band with a certain width at the edge of the backlight module. To this end, the blue light adjusting light emitting layer 130 arranged around the blue light emitting layer 120 can process the blue light generated at the edge of the blue light emitting layer 120 to generate white light, thereby weakening or eliminating the blue light generated by the blue light emitting layer 120 corresponding to the edge of the yellow quantum dot excitation layer 140, and further solving the problem of blue light at the edge of the backlight module, and realizing a narrow frame of the backlight module.
[0033] On the basis of the above-mentioned embodiments, optionally, Figure 2 Another structure diagram of a backlight module is provided for the embodiments of the present application. As shown in Figure 2 The blue light emitting layer 120 includes a plurality of first blue light LED chips 121 arranged in an array. The blue light adjusting light emitting layer 130 includes a plurality of first yellow light LED chips 131; the first yellow light LED chips 131 are arranged around the first blue light LED chips 121, and the first yellow light LED chips 131 and the first blue light LED chips 121 are arranged in an array.
[0034] The first blue light LED chips 121 can emit blue light, and the first yellow light LED chips 131 can emit yellow light. The yellow light emitted by each first yellow light LED chip 131 can be mixed with the blue light emitted by the adjacent first blue light LED chip 121 to generate white light, thereby weakening or eliminating the blue light generated by the blue light emitting layer 120 corresponding to the edge of the yellow quantum dot excitation layer 140, and further solving the problem of blue light at the edge of the backlight module, and realizing a narrow frame of the backlight module.
[0035] It should be noted that: the number of rows and columns of the first yellow light LED chips 131 arranged around the first blue light LED chips 121 in the present scheme can be adjusted according to actual conditions, Figure 2 Only one row and one column of first yellow light LED chips 131 arranged around the first blue light LED chips 121 are shown by way of example.
[0036] On the basis of the above-mentioned embodiments, optionally, Figure 3 Another structure diagram of a backlight module is provided for the embodiments of the present application. As shown in Figure 3As shown, the blue light emitting layer 120 includes a plurality of first blue light LED chips 121 arranged in an array. The blue light adjusting light emitting layer 130 includes a plurality of second yellow light LED chips 132 and a plurality of second blue light LED chips 133; the second yellow light LED chips 132 and the second blue light LED chips 133 are arranged around the first blue light LED chips 121, and the second yellow light LED chips 132 and the second blue light LED chips 133 are arranged in an array with the first blue light LED chips 121, and the second yellow light LED chips 132 and the second blue light LED chips 133 are arranged in a cross.
[0037] The first blue light LED chips 121 and the second blue light LED chips 133 can both emit blue light, and the second yellow light LED chips 132 can generate yellow light. The yellow light generated by each second yellow light LED chip 132 can be mixed with the blue light emitted by the adjacent first blue light LED chips 121 and second blue light LED chips 133 to generate white light, thereby weakening or eliminating the blue light generated by the blue light emitting layer 120 corresponding to the edge of the yellow quantum dot excitation layer 140, and thereby solving the problem of blue light emission at the edge of the backlight module and achieving a narrow frame of the backlight module.
[0038] It should be noted that the number of rows and columns of the second yellow light LED chips 132 and the second blue light LED chips 133 arranged around the first blue light LED chips 121 can be adjusted according to actual conditions, Figure 3 Only one row and one column of the second yellow light LED chips 132 and the second blue light LED chips 133 arranged in a cross around the first blue light LED chips 121 are shown by way of example.
[0039] On the basis of the above-mentioned embodiments, the backlight module can further comprise a dimming driving circuit.
[0040] The dimming driving circuit is connected with the blue light adjusting light emitting layer 130, and the dimming driving circuit is used for adjusting the brightness of the blue light adjusting light emitting layer 130.
[0041] The dimming driving circuit can drive the blue light adjusting light emitting layer 130 to control the brightness of the blue light adjusting light emitting layer 130, so that the blue light adjusting light emitting layer 130 can more flexibly weaken or eliminate the blue light generated by the blue light emitting layer 120 corresponding to the edge of the yellow quantum dot excitation layer 140, that is, more accurately supplement the blue light generated by the blue light emitting layer 120 corresponding to the edge of the yellow quantum dot excitation layer 140, thereby accurately solving the problem of blue light emission at the edge of the backlight module.
[0042] On the basis of the above-mentioned embodiments, the backlight module can further comprise a dimming driving circuit. Figure 4 Another structure schematic diagram of the backlight module provided by the embodiment of the present application is shown in FIG. 4. Figure 4As shown, the backlight module further comprises a lower diffusion layer 150, a prism layer 160 and an upper diffusion layer 170; the lower diffusion layer 150, the prism layer 160 and the upper diffusion layer 170 are sequentially stacked on the side of the yellow quantum dot excitation layer 140 away from the lamp plate 110.
[0043] The surface of the upper diffusion layer 170 is covered with fine texture structures or added with scattering particles, which can disrupt the propagation direction of light and scatter light in all directions, eliminating possible residual bright and dark spots, so that the light is more evenly and softly irradiated on the liquid crystal display panel.
[0044] The lower diffusion layer 150 uses the micro texture on the surface and the added scattering particles to scatter the strong light spots emitted by the light source (the blue light-emitting layer 120, the blue light adjusting light-emitting layer 130 and the yellow quantum dot excitation layer 140), so that the light is uniformly dispersed, the propagation angle is wider and the loss caused by the angle problem is reduced, thereby avoiding the subsequent appearance of local over-bright light spots.
[0045] The prism layer 160 is usually composed of a plurality of micro-prism structures arranged, which works by using the principle of light refraction, can capture light scattered in non-orthoview direction, and re-converge and refract the light scattered in non-orthoview direction, so that the light propagates towards the direction of the liquid crystal display cell, thereby greatly improving the brightness of the display screen. In addition, the prism layer 160 can also accurately control the exit angle of light and optimize the visible angle range. While ensuring high brightness and high contrast on the front of the screen, the light is moderately limited from scattering at too large an angle to prevent the contrast from decreasing and the picture from whitening when viewing from the side of the display.
[0046] In addition, when the light passes through the lower diffusion layer 150 and the prism layer 160 to reach the upper diffusion layer 170, there are still some uneven light left. The upper diffusion layer 170 can again disrupt the propagation direction of light to make the light distribution more uniform, so as to ensure that the light received by the liquid crystal display cell is balanced everywhere, eliminating the possible small dark corners and bright corners on the screen and improving the overall display quality.
[0047] In summary, the lower diffusion layer 150, the prism layer 160 and the upper diffusion layer 170 gradually convert the original light emitted by the light source into uniform, bright and directionally accurate light suitable for the liquid crystal display cell to receive.
[0048] On the basis of the above embodiment, optionally, with reference to Figure 4 The backlight module further comprises a back plate 180; the back plate 180 is arranged on the side of the lamp plate 110 away from the blue light-emitting layer 120 and the blue light adjusting light-emitting layer 130, and on the edge side of the lamp plate 110, the blue light-emitting layer 120, the blue light adjusting light-emitting layer 130, the yellow quantum dot excitation layer 140, the lower diffusion layer 150, the prism layer 160 and the upper diffusion layer 170.
[0049] The back plate 180 is an important support and protection component of the entire backlight module. Specifically, the back plate 180 can provide a solid support frame for the lamp plate 110, the blue light emitting layer 120, the blue light adjusting light emitting layer 130, the yellow quantum dot excitation layer 140, the lower diffusion layer 150, the prism layer 160 and the upper diffusion layer 170, so that the lamp plate 110, the blue light emitting layer 120, the blue light adjusting light emitting layer 130, the yellow quantum dot excitation layer 140, the lower diffusion layer 150, the prism layer 160 and the upper diffusion layer 170 can maintain a stable spatial positional relationship, and prevent impurities such as dust and water vapor from entering the lamp plate 110, the blue light emitting layer 120, the blue light adjusting light emitting layer 130, the yellow quantum dot excitation layer 140, the lower diffusion layer 150, the prism layer 160 and the upper diffusion layer 170, so as to avoid the optical performance of the lamp plate 110, the blue light emitting layer 120, the blue light adjusting light emitting layer 130, the yellow quantum dot excitation layer 140, the lower diffusion layer 150, the prism layer 160 and the upper diffusion layer 170 from being reduced due to dust, and avoid the lamp plate 110, the blue light emitting layer 120, the blue light adjusting light emitting layer 130, the yellow quantum dot excitation layer 140, the lower diffusion layer 150, the prism layer 160 and the upper diffusion layer 170 from being short-circuited due to moisture.
[0050] The display panel provided by the embodiment of the present application comprises a liquid crystal display box and the backlight module provided by any embodiment of the present application, and therefore has the beneficial effects of the backlight module provided by any embodiment of the present application, which will not be described herein.
[0051] The display device provided by the embodiment of the present application comprises the display panel provided by any embodiment of the present application, and therefore has the beneficial effects of the display panel provided by any embodiment of the present application, which will not be described herein.
[0052] It should be understood that the various forms of flow shown above can be reordered, added to, or deleted from. For example, the steps described in the present application can be executed in parallel, in sequence, or in different orders, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.
[0053] The specific embodiments described above do not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.
Claims
1. A backlight module, characterized in that, It includes a light panel, a blue light-emitting layer, a blue light-adjusting light-emitting layer, and a yellow quantum dot excitation layer; The blue light-emitting layer is disposed on the lamp panel, the blue light-adjusting light-emitting layer is disposed around the blue light-emitting layer on the lamp panel, and the yellow quantum dot excitation layer is disposed on the side of the blue light-emitting layer and the blue light-adjusting light-emitting layer away from the lamp panel.
2. The backlight module according to claim 1, characterized in that, The blue light-emitting layer includes multiple first blue LED chips arranged in an array.
3. The backlight module according to claim 2, characterized in that, The blue light modulating emitting layer includes multiple first yellow LED chips; The first yellow LED chip is arranged around the first blue LED chip, and the first yellow LED chip and the first blue LED chip are arranged in an array.
4. The backlight module according to claim 2, characterized in that, The blue light modulating light-emitting layer includes multiple second yellow LED chips and multiple second blue LED chips; The second yellow LED chip and the second blue LED chip are arranged around the first blue LED chip, and the second yellow LED chip and the second blue LED chip are arranged in an array with the first blue LED chip, and the second yellow LED chip and the second blue LED chip are arranged in a cross pattern.
5. The backlight module according to any one of claims 1-4, characterized in that, It also includes a dimming drive circuit; The dimming drive circuit is connected to the blue light regulating luminescent layer, and the dimming drive circuit is used to adjust the brightness of the blue light regulating luminescent layer.
6. The backlight module according to claim 1, characterized in that, It also includes the lower diffusion layer; The lower diffusion layer is disposed on the side of the yellow quantum dot excitation layer away from the lamp panel.
7. The backlight module according to claim 6, characterized in that, It also includes a prism layer and an upper diffusion layer; The prism layer and the upper diffusion layer are disposed on the side of the lower diffusion layer away from the lamp panel.
8. The backlight module according to claim 7, characterized in that, It also includes the back panel; The back plate is disposed on the side of the lamp panel away from the blue light-emitting layer and the blue light-adjusting light-emitting layer, as well as on the edge side of the lamp panel, the blue light-emitting layer, the blue light-adjusting light-emitting layer, the yellow quantum dot excitation layer, the lower diffusion layer, the prism layer, and the upper diffusion layer.
9. A display panel, characterized in that, It includes a liquid crystal display cell and a backlight module as described in any one of claims 1-8.
10. A display device, characterized in that, Includes the display panel as described in claim 9.