Display module and display device

Abstract

Provided are a display module and a display device, belonging to the field of display technology. The display module includes: a driving backplane, and a plurality of pixels and color filters located on one side of the driving backplane and stacked in sequence. Each pixel includes a plurality of light-emitting elements, the color filter includes a color filter unit corresponding to each pixel, and each color filter unit includes a plurality of color filter films of different colors corresponding to the plurality of light-emitting elements. Because the thickness of at least two color filter films is different, the problem of the material affecting the transmittance of the color filter film can be solved by flexibly setting the thickness of each color filter film. Furthermore, the white light obtained by synthesizing the light emitted by the plurality of light-emitting elements through the plurality of color filter films can have better brightness and less color deviation.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0002] Micro-OLED (organic light-emitting diode) display is a display product that uses a silicon-based circuit as a backplane and a top-emitting OLED as a light source. It has the advantages of small size, light weight, high contrast and low power consumption.

[0003] In related art, a Micro-OLED display generally comprises: multiple pixels and color filters (CF) stacked in sequence. Each pixel includes multiple light-emitting elements, and the color filter includes multiple color filter films corresponding to the multiple light-emitting elements and having different colors. The multiple color filter films are used to filter the white light emitted by the multiple light-emitting elements into different colored light, and the different colored light can be combined into white light.

[0004] However, due to the influence of the color filter material, the transmittance of color filters of different colors varies, which causes the re-synthesized white light to have color deviation and poor brightness. Summary of the Invention

[0005] The present disclosure provides a display module and display device that can address the related art problem of different colors of color filters having different transmittances due to the influence of the color filter material. This results in the re-synthesized white light being prone to color cast and poor brightness. The technical solution is as follows:

[0006] In one aspect, a display module is provided, comprising:

[0007] Driver backplane;

[0008] a plurality of pixels located on one side of the driving backplane, wherein the pixels include a plurality of light-emitting elements;

[0009] and a color filter located on a side of the plurality of pixels away from the driving backplane, the color filter comprising a plurality of color filter units corresponding one-to-one to the plurality of pixels, the color filter units comprising a plurality of color filter films corresponding one-to-one to the plurality of light-emitting elements in the pixels;

[0010] Among the multiple color filters, each color filter has a different color, at least two color filters have a different thickness, and the at least two color filters are located at different heights close to the lower surface of the driving backplane, and each color filter is located at the same height away from the upper surface of the driving backplane.

[0011] Optionally, the pixel includes three light-emitting elements, and the color filter unit includes a red filter film, a green filter film, and a blue filter film corresponding to the three light-emitting elements one by one;

[0012] Wherein, the thickness of the red filter film is the same as that of the green filter film, and is greater than that of the blue filter film;

[0013] Alternatively, the thickness of the red filter film is greater than that of the green filter film, and the thickness of the green filter film is greater than that of the blue filter film.

[0014] Optionally, the display module further includes:

[0015] a flat layer located on a side of the color filter away from the driving backplane;

[0016] And, a transparent pad layer is located on the side of the color filter close to the driving backplane, the transparent pad layer includes a transparent pad corresponding to at least one color filter film in the color filter unit, and the transparent pad is used to make the multiple color filter films in the color filter unit flush with the side close to the flat layer.

[0017] Optionally, for each of the plurality of color filter films, the thickness of the transparent spacer corresponding to the color filter film is the difference between the thickness of the thickest color filter film among the plurality of color filter films and the thickness of the color filter film.

[0018] Optionally, the light transmittance of the transparent cushion layer is greater than 90%.

[0019] Optionally, the material of the transparent pad includes at least one of silicon nitride, aluminum oxide, polyparaxylene and silicon oxide.

[0020] Optionally, the driving backplane includes: a silicon-based backplane.

[0021] Optionally, the light emitting element includes: an anode layer, a light emitting material layer, and a cathode layer stacked in sequence in a direction away from the driving backplane; the display module further includes:

[0022] A pixel definition layer located on one side of the driving backplane to separate different light-emitting elements;

[0023] a first encapsulation layer located between the light-emitting element and the color filter;

[0024] Also, a second packaging layer, a lens layer and a cover plate are located on the side of the color filter away from the driving backplane and are stacked in sequence in a direction away from the driving backplane, wherein the lens layer includes a plurality of microlenses corresponding one-to-one to the plurality of color filter films.

[0025] Optionally, in a direction parallel to the bearing surface of the driving backplane, the plurality of color filters and the plurality of micro lenses are sequentially arranged at intervals;

[0026] Among the plurality of color filter films, the height difference between the bottom surfaces of two adjacent color filter films is smaller than the spacing width between two corresponding adjacent micro lenses and is larger than the thickness of the pixel definition layer.

[0027] On the other hand, a display device is provided, comprising: a power supply component, and the display module as described in the above aspect;

[0028] The power supply component is connected to the display module and is used to supply power to the display module.

[0029] In summary, the beneficial effects brought about by the technical solutions provided by the embodiments of the present disclosure may include at least:

[0030] A display module and a display device are provided. The display module includes: a driving backplane, and a plurality of pixels and color filters stacked in sequence on one side of the driving backplane. Each pixel includes a plurality of light-emitting elements, the color filter includes a color filter unit corresponding to each pixel, and each color filter unit includes a plurality of color filter films of different colors corresponding to the plurality of light-emitting elements. Because the thickness of at least two color filter films is different, the problem of the material affecting the transmittance of the color filter films can be solved by flexibly setting the thickness of each color filter film. Furthermore, the white light obtained by synthesizing the light emitted by the plurality of light-emitting elements through the plurality of color filter films can have better brightness and less color deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 is a structural diagram of a display module provided by an embodiment of the present disclosure;

[0033] Figure 2 is a structural diagram of another display module provided by an embodiment of the present disclosure;

[0034] Figure 3 is a structural diagram of another display module provided by an embodiment of the present disclosure;

[0035] Figure 4 is a structural diagram of another display module provided by an embodiment of the present disclosure;

[0036] Figure 5 is a structural diagram of another display module provided by an embodiment of the present disclosure;

[0037] Figure 6 is a structural diagram of another display module provided by an embodiment of the present disclosure;

[0038] Figure 7 It is a structural schematic diagram of a display device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0040] Figure 1 Schematic diagram of the structure of a display module provided by an embodiment of the present disclosure. Figure 1 As shown, the display module includes:

[0041] Driver backplane 01.

[0042] A plurality of pixels 02 are located on one side of the driving backplane 01 , and each pixel 02 includes a plurality of light-emitting elements 021 .

[0043] The driver backplane 01 can be used to drive the multiple light-emitting elements 021 included in each pixel 02 to emit light. Accordingly, the driver backplane 01 can include a driver circuit, such as a driver transistor, to drive the light-emitting elements 021 to emit light. The driver transistor can be electrically connected to the light-emitting elements 021 and used to transmit a driving voltage to the light-emitting elements 021 to drive the light-emitting elements 021 to emit light. Furthermore, in the disclosed embodiment, the driver backplane 01 can be used to drive the light-emitting elements 021 to emit white light. That is, each light-emitting element 021 can emit white light.

[0044] exist Figure 1 On the basis of this, it can be seen from Reference 2 which shows a cross-sectional view of a display module that the display module described in the embodiment of the present disclosure further includes: a color filter 03 located on a side of the plurality of pixels 02 away from the driving backplane.

[0045] The color filter 03 includes a plurality of color filter units 031 corresponding one-to-one with the plurality of pixels 02. Each color filter unit 031 includes a plurality of color filter films 031M corresponding one-to-one with the plurality of light-emitting elements 021 in the pixel 02. Furthermore, the plurality of color filter films 031M included in each color filter unit 031 have different colors, and at least two color filter films 031M have different thicknesses h1. At least two color filter films 031M are located at different heights (i.e., uneven) near the bottom surface of the driver backplane 01, while the color filter films 031M are located at the same height (i.e., even) away from the top surface of the driver backplane 01.

[0046] The color filter 03 is an optical filter that reflects color. It selectively transmits a narrow range of wavelengths while absorbing undesirable wavelengths, thereby achieving the goal of transmitting monochromatic light. Specifically, the color filter film 031M included in the color filter 03 is used to filter the white light emitted by the light-emitting element 021, transforming it into colored light that is perceptible to the human eye. In other words, the white light emitted by each light-emitting element 021 is converted into colored light after passing through the corresponding color filter film 031M. This colored light is the same color as the color of the color filter film 031M through which it passes.

[0047] For example, assuming that color filter 031M is red, the light emitted by light-emitting element 021 can be converted into red light after passing through red color filter 031M. Because each color filter unit 031 includes multiple color filters 031M with different colors, the white light emitted by each light-emitting element 021 in each pixel 02 has different colors after being filtered by the corresponding green filter 031M. These different colors of light can then be combined to form white light.

[0048] Currently, the thickness of color filters 031M of different colors is generally equal. However, due to material influence, the brightness of the synthesized white light after light is filtered through color filters 031M of equal thickness can vary significantly. Research has found that the synthesized white light can exhibit a certain degree of color shift, such as a bluish, yellowish, or purplish tint. Color shift can be indicated by color coordinates, and different batches of display panels can correspond to a standard target white color coordinate. Accordingly, color shift can mean that the color coordinates of the synthesized white light differ significantly from the target white color coordinates. To address this issue, gamma tuning is currently commonly used to adjust the driving voltage applied to the light-emitting element 021 corresponding to the different color filters 031M to improve grayscale brightness, thereby matching the target white color coordinates and reducing color shift. However, gamma tuning often requires reducing the original brightness of the light, i.e., lowering the driving voltage, resulting in a lower brightness of the synthesized white light. On this basis, if the synthetic backlight brightness is to be further improved, the driving voltage needs to be increased as a whole, which results in higher power consumption of the driving circuit and a shorter lifespan.

[0049] Although the transmittance of different colored color filters 031M within a color filter unit 031 varies due to the material, transmittance is positively correlated with the thickness of the color filter 031M. That is, the thicker the color filter 031M, the lower and worse its transmittance; the thinner the color filter 031M, the higher and better its transmittance. Therefore, in the disclosed embodiment, at least two of the multiple color filter films 031M included in each color filter unit 031 have different thicknesses. This allows for flexible adjustment of the thickness of the different color filter films 031M to address the issue of material influence on transmittance. This ensures that the synthesized white light has minimal color shift and high brightness, thereby enhancing the display quality of the display panel. Minimal color shift can mean that the color coordinates of the synthesized white light are close to or equal to the target white color coordinates. Furthermore, because the disclosed embodiment only adjusts the thickness of the color filter 031M, it does not increase the power consumption of the driver circuit. Furthermore, based on the different thicknesses, the embodiment of the present disclosure further arranges the color filter films 031M of different thicknesses to be flush with the side away from the driving backplane 01 , thereby ensuring better light uniformity on the upper surface.

[0050] For example, for color filters 031M of different colors, those with relatively low transmittance due to material influence can have their thickness h1 set to be thinner to increase transmittance through thickness adjustment. For color filters 031M with relatively high transmittance due to material influence, their thickness h1 can be set to be thicker to reduce transmittance through thickness adjustment. Ultimately, the synthesized white light is brighter and has less color shift. Of course, in some embodiments, a color matching formula (abbreviated as "color matching formula") can be used to pre-calculate the color coordinates of the synthesized white light, which are the target white color coordinates. The brightness ratio of the colored light obtained by filtering the white light with the different colored color filters 031M is then reflected in the transmittance. The thickness of the different color filters 031M can then be flexibly adjusted based on the calculated brightness ratio to reliably improve color shift. Alternatively, in addition to adjusting thickness based solely on transmittance to increase brightness, a color matching formula can be used to determine the brightness ratio, and gamma adjustment can be performed based on the color matching ratio to improve color shift.

[0051] In summary, the embodiments of the present disclosure provide a display module. The display module includes: a driving backplane, and a plurality of pixels and color filters located on one side of the driving backplane and stacked in sequence. Each pixel includes a plurality of light-emitting elements, the color filter includes a color filter unit corresponding to each pixel, and each color filter unit includes a plurality of color filter films of different colors corresponding to the plurality of light-emitting elements. Because the thicknesses of at least two color filter films are different, the problem of the material affecting the transmittance of the color filter film can be solved by flexibly setting the thickness of each color filter film. Furthermore, the white light obtained by synthesizing the light emitted by the plurality of light-emitting elements through the plurality of color filter films can have better brightness and less color deviation.

[0052] Optional, Figure 3 FIG is a cross-sectional view of another display panel provided by an embodiment of the present disclosure. Figure 3 As shown, each pixel 02 may include three light emitting elements 021 . Accordingly, the color filter unit 031 may include three color filter films 031 -M of different colors corresponding to the three light emitting elements 021 .

[0053] For example, reference Figure 3 The three different colored filter films 031-M can be: red filter film 031M-R, green filter film 031M-G, and blue filter film 031M-B. Red filter film 031-R filters white light into red light, green filter film 031M-G filters white light into green light, and blue filter film 031M-B filters white light into blue light. Red, green, and blue light can be used to synthesize white light.

[0054] Optional, combined Figure 1 and Figure 3 As can be seen, the multiple pixels 02 can be arranged in an array, and the multiple light-emitting elements 021 in each pixel 02 can be arranged in rows or columns. In the color filter unit 031 corresponding to each pixel 02, the multiple color filter films 031-M of different colors can also be arranged in rows or columns, and the arrangement direction is the same as the arrangement direction of the corresponding multiple light-emitting elements 021. For example, both are arranged in rows.

[0055] Among them, such as Figure 3 As shown, the thickness h1-R of the red filter film 031M-R and the thickness h1-G of the green filter film 031M-G can be the same, and can be greater than the thickness h1-B of the blue filter film 031M-B.

[0056] or, as Figure 4 As shown, the thickness h1-R of the red filter film 031M-R can be greater than the thickness h1-G of the green filter film 031M-G, and the thickness h1-G of the green filter film 031M-G can be greater than the thickness h1-B of the blue filter film 031M-B. In other words, the thickness h1-R of the red filter film 031M-R, the thickness h1-G of the green filter film 031M-G, and the thickness h1-B of the blue filter film 031M-B decrease in sequence.

[0057] Due to material influence, at the same thickness, the transmittance of red filter film 031M-R and blue filter film 031M-B is generally lower than that of green filter film 031M-G, and the transmittance of blue filter film 031M-B is generally the lowest. Therefore, by making blue filter film 031M-B thinner than the other color filters 031-M, its transmittance can be increased, thereby increasing the brightness of the generated blue light. This can further improve the overall brightness of the final synthesized white light and reduce color cast.

[0058] Taking each color filter unit 031 including a red filter film 031M-R, a green filter film 031M-G, and a blue filter film 031M-B, and the target white color coordinates being (0.31, 0.33) as an example, the differences between the present application solution and the current related art are compared:

[0059] First, referring to Table 1 below, the thicknesses h1-R of the red filter 031M-R, h1-G of the green filter 031M-G, and h1-B of the blue filter 031M-B are generally equal, all 1.2 microns (μm). Based on these thicknesses, and influenced by the materials, the brightness of white light filtered through the red filter 031M-R, converted to red light, is 251.8 nits; the brightness of white light filtered through the green filter 031M-G, converted to green light, is 437.4 nits; and the brightness of white light filtered through the blue filter 031M-B, converted to blue light, is 73.5 nits. Correspondingly, the brightness of the synthesized white light is 251.8 + 437.4 + 73.5 = 762.7 nits, and the ratio of the brightness of the three colors of red, green, and blue in the synthesized white light (i.e., the brightness ratio) is approximately: 251.8 / 73.5:437.4 / 73.5:73.5 / 73.5 = 3.4:6.0:1.0. The color coordinates of the synthesized white light are (0.33, 0.35), which differ from the target white color coordinates (0.31, 0.33), resulting in a yellowish color cast.

[0060] Testing revealed that the primary cause of this yellowish cast is insufficient blue light brightness and excessive red and green light brightness. To synthesize the target white color coordinates (0.31, 0.33), the color matching formula determines that the three-color brightness ratio needs to be adjusted from the original 3.4:6.0:1.0 to 2.4:5.1:1.0. In other words, the red and green light brightnesses are reduced, while the blue light brightness does not need to be adjusted. Typically, gamma adjustment is used to reduce the red and green light brightnesses, adjusting the three-color brightness ratio to 2.4:5.1:1.0. For example, referring to Table 1, the red light brightness is reduced from 251.8 nits to 178.1 nits, and the green light brightness is reduced from 437.4 nits to 375.3 nits. On this basis, tests have found that the color coordinates of the white light after gamma adjustment are (0.309, 0.330), which are closer to the target white color coordinates than the color coordinates before gamma adjustment (0.33, 0.35), thereby improving the color cast problem.

[0061] Table 1

[0062] Color filter: thickness 031-R：1.2 031-G：1.2 031-B：1.2 W Light Color Red light Green Light Blu-ray White light Brightness before gamma adjustment 251.8 437.4 73.5 762.7 Brightness ratio before gamma adjustment 3.4 6.0 1.0 Brightness after gamma adjustment 178.1 375.3 73.5 626.9 Brightness ratio after gamma adjustment 2.4 5.1 1.0

[0063] However, as can be seen from Table 1, while the color cast problem is improved, the brightness of the synthesized white light after gamma adjustment is reduced from 762.7 nits to 178.1 + 375.3 + 73.5 = 626.9 nits, a brightness attenuation of approximately (762.7 - 626.9) / 762.7 = 18%, resulting in waste of red and green light brightness. This problem is particularly serious when developing high-brightness customer products, especially when the luminous efficiency of the light-emitting element and the current density of the driver circuit are difficult to improve. If 1 / 5 of the brightness is lost during the gamma adjustment process, it will be difficult to achieve the high brightness specification, making the problem particularly serious. Furthermore, as can be seen from Table 1, due to the large difference in red light brightness before and after gamma adjustment, the adjustment voltage amplitude is also relatively large during gamma adjustment, which also increases the operating power consumption of the driver circuit.

[0064] However, based on the above embodiment, it can be seen that the reason why the brightness of the synthesized white light is poor is not only due to the excess brightness of red and green light, but also due to the low brightness of blue light. Figure 3 As shown in Table 2 below, gamma adjustment can be omitted in the present embodiment. Instead, based on the film structure, the thickness h1-B of the blue filter film 031M-B can be reduced from 1.2μm to 0.5μm, and the thickness h1-R of the red filter film 031-R and the thickness h1-G of the green filter film 031-G can be increased from 1.2μm to 1.7μm. In other words, the thickness h1-R of the red filter film 031M-R and the thickness h1-G of the green filter film 031M-G are set to be the same, and greater than the thickness h1-B of the blue filter film 031M-B. Based on this, tests showed that, using the same filter film material, the brightness of blue light can be increased from 73.5 nits to 288.8 nits, the brightness of red light can be reduced from 251.8 nits to 220.6 nits, and the brightness of green light can be reduced from 437.4 nits to 352.4 nits. The brightness of the final synthesized white light increases from 762.7 to: 220.6 + 352.4 + 288.8 = 861.8 nits. The brightness ratio of red light, green light, and blue light in the synthesized white light is approximately: 220.6 / 288.8: 352.4 / 288.8: 288.8 / 288.8 = 0.8:1.2:1.0. This shows that the brightness of the synthesized white light is significantly improved based on the thickness adjustment.

[0065] Of course, if color shift still exists based on this brightness, the color matching formula can be used to recalculate the three-color brightness ratio and perform gamma adjustment based on the brightness ratio to improve the color shift. For example, referring to Table 2, the three-color brightness ratio calculated using the color matching formula is approximately 0.6:1.0:1.0. Based on this brightness ratio, the red light brightness after gamma adjustment is reduced from 220.6 nits before gamma adjustment to 183.1 nits, and the green light brightness after gamma adjustment is reduced from 352.4 nits before gamma adjustment to 294.4 nits, while the blue light brightness remains unchanged. Correspondingly, the synthesized white light brightness is reduced from 861.8 nits to 766.4 nits. As can be seen from these parameters, although gamma adjustment is performed in the same manner, it is based on the color filter film 031M with the same target thickness. By pre-setting at least two color filter films 031M with different thicknesses, the disclosed embodiment can pre-emptively improve brightness while increasing transmittance, ensuring that the white light brightness remains high after gamma adjustment. Compared to the white light brightness after gamma adjustment at the same thickness in Table 1, the brightness is increased by approximately (766.4 - 626.9) / 626.9 = 22%. Furthermore, it can be seen that when gamma adjustment is performed with different thicknesses of the color filter 031M, the red and green light brightness does not decrease significantly, effectively utilizing the red and green light brightness without wasting brightness. Furthermore, the driver circuit power consumption is also reduced accordingly.

[0066] Table 2

[0067] Color filter: thickness 031-R：1.7 031-G：1.7 031-B：0.5 W Light Color Red light Green Light Blu-ray White light pre-gamma brightness 220.6 352.4 288.8 861.8 pre-gamma luminance ratio 0.8 1.2 1.0 Post-gamma brightness 183.1 294.4 288.8 766.4 Brightness ratio after gamma 0.6 1.0 1.0

[0068] Of course, in some embodiments, the required film thicknesses can be determined simultaneously based on both brightness and color shift requirements. Based on these film thicknesses, the thickness h1-R of the red filter film 031M-R, the thickness h1-G of the green filter film 031M-G, and the thickness h1-B of the blue filter film 031M-B can be flexibly adjusted. In other words, the disclosed embodiments can tailor the film thickness of the color filter film 031M based on brightness and / or color shift requirements, effectively improving the brightness of the display panel while simultaneously addressing color shift issues and ensuring a superior display quality.

[0069] Optional, Figure 5 FIG. 1 is a structural diagram of another display module provided by an embodiment of the present disclosure. Figure 5 As shown, the display module recorded in the embodiment of the present disclosure may further include:

[0070] The flat layer 04 located on the side of the color filter 03 away from the driving backplane 01 can be used to flatten and cover the various color filter films 031M of different thicknesses included in each color filter unit 031 in the color filter 03, so as to facilitate the continued formation of other film layers, such as an encapsulation layer, on the side of the color filter 03 away from the driving backplane 01.

[0071] However, due to process limitations, the thickness of the planarization layer 04 can generally only be around 0.5μm. If the thickness of each color filter 031M is the same, then planarization is possible. However, if the thickness of each color filter 031M varies, i.e., there are steps, then planarization may not be achieved. For example, taking the film thicknesses shown in Table 2 as an example, assuming that each color filter unit 031 includes a red filter film 031M-R, a green filter film 031M-G, and a blue filter film 031M-B, and that the thickness h1-R of the red filter film 031M-R and the thickness h1-G of the green filter film 031M-G are both 1.7 μm, and the thickness h1-B of the blue filter film 031M-B is 0.5 μm, it can be seen that the step difference between the green filter film 031M-G and the blue filter film 031M-B arranged sequentially in the row direction is 1.7-0.5=1.2 μm. This is significantly different from the thickness of the planarization layer 04 of 0.5 μm, resulting in the planarization layer 04 being unable to effectively planarize and cover the color filter 03.

[0072] In addition, if there is an overlapping portion (called a bull's horn) between each two adjacent color filter films 031M, that is, a portion of one (e.g., the green filter film 031M-G) is placed on the side of the other (e.g., the blue filter film 031M-B) away from the driving backplane 01, it will be more difficult to achieve flat coverage. And, in other aspects, if the step difference of one color filter film 031M (e.g., the green filter film 031M-G) is consistent with the step difference of the color filter film 031M (e.g., the red filter film 031M-R) adjacent to its left, and the step difference of the color filter film 031M (e.g., the blue filter film 031M-B) adjacent to its right, then each color filter film 031M will be formed according to the expected design morphology, and the shape after forming will be relatively regular. If the step difference is inconsistent, each color filter film 031M will be deformed during forming. For example, still combined Figure 3 As shown in Table 2, if the green filter film 031M-G has no step difference with the red filter film 031M-R on its left, but has a large step difference with the blue filter film 031M-B on its right, the color filter film 031M will be crowded to the right and deformed.

[0073] In view of the above problems, continue to refer to Figure 5 The display module provided by the embodiment of the present disclosure may further include: a transparent pad 05 located on a side of the color filter 03 close to the driving backplane 01 .

[0074] The transparent underlayer 05 may include a transparent spacer 051 corresponding to at least one color filter film 031M in the color filter unit 031. This transparent spacer 051 can be used to align the multiple color filters 031M in the color filter unit 031 on the side closest to the planar layer 04. Specifically, the transparent spacer 051 can be positioned in contact with the color filter film 031M and located on the side of the color filter film 031M away from the planar layer 04. This compensates for the thickness of the color filter film 031M, ensuring that the sides of the color filters 031M with varying thicknesses facing away from the driver backplane 01 are more even. This not only facilitates the planar layer 04's smooth coverage of the color filter 03, but also resolves the aforementioned deformation problem caused by the step difference.

[0075] Optional, still reference Figure 5 It can be seen that for each color filter 031M in the plurality of color filters 031M, the thickness h2 of the transparent spacer 051 corresponding to that color filter 031M can be the difference between the thickness of the thickest color filter 031M among the plurality of color filters 031M and the thickness of that color filter 031M. In other words, based on the thickness of the thickest color filter 031M, transparent spacers 051 can be added to the sides of other color filters 031M with relatively smaller thicknesses to compensate for the thickness of those color filters 031M. This ensures that the color filters 031M of varying thicknesses are flush on the sides away from the driver backplane 01 while saving costs.

[0076] For example, combined with Figure 5 Assuming that each color filter unit 031 includes a red filter film 031M-R, a green filter film 031M-G, and a blue filter film 031M-B, and that the thickness h1-R of the red filter film 031M-R is 1.1 μm, the thickness h1-G of the green filter film 031M-G is 0.7 μm, and the thickness h1-B of the blue filter film 031M-B is 0.3 μm, then a transparent spacer 051 with a thickness of 1.1-0.7=0.4 μm can be placed on the side of the green filter film 031M-G away from the flat layer 04, using 1.1 μm as a standard. Similarly, a transparent spacer 051 with a thickness of 1.1-0.3=0.8 μm can be placed on the side of the blue filter film 031M-B away from the flat layer 04. That is, Figure 5 In the figure, the thickness h2 of the transparent spacer 051 located on the side of the green filter film 031M-G away from the flat layer 04 is 0.4 μm, and the thickness h2 of the transparent spacer 051 located on the side of the blue filter film 031M-B away from the flat layer 04 is 0.8 μm.

[0077] Of course, in some other embodiments, a transparent spacer 051 may be provided on the side of the color filter 031M closest to the planar layer 04. Furthermore, transparent spacers 051 of varying thicknesses may be provided on one side of each color filter 031M. The prerequisite is to ensure that the sides of the multiple color filters 031M in the color filter unit 031 are aligned with the planar layer 04.

[0078] Optionally, the light transmittance of the transparent underlayer 05 described in the embodiment of the present disclosure can be greater than 90%. In other words, the light transmittance is good. In this way, the light transmittance of the color filter 03 can be avoided from being affected, ensuring a good display effect.

[0079] For example, the material of the transparent pad layer 05 may include at least one of light-transmitting materials such as silicon nitride (SiNx), aluminum oxide (Al2O3), parylane, and silicon oxide (SiOx).

[0080] Optionally, the light transmittance of the transparent underlayer 05 may be greater than 90%, that is, the light transmittance is good.

[0081] Optionally, the driving backplane 01 described in the embodiment of the present disclosure may include: a silicon-based backplane. A silicon-based backplane refers to a circuit board made of silicon-based materials, such as monocrystalline silicon.

[0082] Among them, the silicon-based backplane can be integrated with functions such as temperature compensation, brightness control, gamma correction and image processing, which play the role of driving pixel light emission and controlling display. Correspondingly, the silicon-based backplane can also be called a back panel deriver integrated circuit (BP Driver IC). In addition, a bonding pad for transmitting signals to the application end (AP) can be provided on the silicon-based backplane, and a sealing ring is designed around it to prevent stress from tearing the silicon-based chip and causing damage during dicing. In addition, some areas for cutting will also be designed. Circuits are generally not arranged in this area, but some wafer alignment marks and wafer acceptance tests (WAT) will be arranged. The sealing ring and the cutting area work together to ensure that the damage caused by cutting will not affect the functional circuit area, thereby ensuring that the functional circuit in the driver backplane can still work normally after cutting. In recent years, display panels made of silicon-based backplanes have been frequently used in the fields of virtual reality (VR) and / or augmented reality (AR), and have received increasing attention from the consumer market and manufacturing industry.

[0083] Optional, Figure 6 FIG. 1 is a structural diagram of another display module provided by an embodiment of the present disclosure. Figure 6 As shown, the light-emitting element 021 in the embodiment of the present disclosure may include: an anode layer Anode, a light-emitting material layer EL, and a cathode layer Cathode, stacked in sequence in a direction away from the driving backplane. In other words, the light-emitting element 021 may be an OLED. EL stands for "electroluminescent" in English and "electroluminescence" in Chinese, and is a type of light-emitting material. Furthermore, the display module may also include:

[0084] A pixel defining layer (PDL) located on one side of the driving backplane 01 to separate different light-emitting elements 021, Figure 6 For example, the pixel definition layer PDL may have a plurality of openings, and the anode layers Anode of different light emitting elements 021 may be located in different openings and separated by the pixel definition layer PDL.

[0085] The first encapsulation layer TFE1 is located between the light emitting element 021 and the color filter 03. TFE is short for "thin film encapsulation" in English and "thin film encapsulation" in Chinese, which is a type of encapsulation method.

[0086] The second encapsulation layer TFE2, lens layer 06 and cover plate 07 are located on the side of the color filter 03 away from the driving backplane 01 and are sequentially stacked in a direction away from the driving backplane 01. The lens layer 06 may include multiple micro lenses 061 corresponding to the multiple color filter films 031M.

[0087] The cover plate 07 can be a glass cover plate. The first encapsulation layer TFE1 can be used to effectively encapsulate the driver backplane 01 and light-emitting element 021, isolating them from water and oxygen intrusion. The second encapsulation layer TFE2 can be used to effectively encapsulate the color filter 03, flat layer 04, and transparent underlayer 05, isolating them from water and oxygen intrusion. The lens layer 06 can be used to synthesize white light. The cover plate 07 can be used for secondary encapsulation.

[0088] Optionally, the material of the pixel definition layer (PDL) may include an inorganic insulating material. The materials of the first encapsulation layer (TFE1) and the second encapsulation layer (TFE2) may include at least one of silicon nitride (SiNx), aluminum oxide (Al2O3), parylane, and silicon oxide (SiOx). For example, the first encapsulation layer (TFE1) and the second encapsulation layer (TFE2) may each include multiple layers stacked in sequence, each layer being made of silicon nitride (SiNx), aluminum oxide (Al2O3), parylane, or silicon oxide (SiOx), and the materials of each layer may be the same or different.

[0089] It should be noted that, since the material of the transparent pad layer 05 is the same as the material of the encapsulation layer included in the display module itself, it can not only ensure light transmittance but also save costs.

[0090] Optionally, as described in the above embodiment, adjacent color filters 031M may overlap in a direction parallel to the bearing surface of the drive backplane 01. Alternatively, adjacent color filters 031M may be arranged at intervals. Accordingly, the microlenses 061 corresponding to the plurality of color filters 031M may also be arranged at intervals in a direction parallel to the bearing surface of the drive backplane 01. Furthermore, based on the intervals between adjacent color filters 031M, a black matrix layer may be provided between adjacent color filters 031M to isolate the filtering of light of different colors, ensuring a better display effect.

[0091] Optional, combined Figure 6In the plurality of color filter films 031M, the height difference between the bottom surfaces of two adjacent color filter films 031M can be smaller than the spacing between two corresponding adjacent microlenses 061, and can be greater than the thickness of the pixel definition layer (PDL). This improves film formation uniformity. Film formation refers to the formation of the various film layers described in the above embodiments.

[0092] For example, if the driver backplane 01 is a silicon-based backplane, the pixel definition layer (PDL) is typically thin, ranging from approximately 10 nanometers (nm) to 100 nm. Within this thickness range, the height difference between the bottom surfaces of two adjacent color filters 031M satisfies the aforementioned arrangement, thereby further improving film uniformity in silicon-based display products.

[0093] Optionally, each film layer described in the above embodiment may be formed by a one-time patterning process, which may include the following process steps: photoresist coating, exposure, development, etching, photoresist stripping, and the like.

[0094] In summary, the embodiments of the present disclosure provide a display module. The display module includes: a driving backplane, and a plurality of pixels and color filters located on one side of the driving backplane and stacked in sequence. Each pixel includes a plurality of light-emitting elements, the color filter includes a color filter unit corresponding to each pixel, and each color filter unit includes a plurality of color filter films of different colors corresponding to the plurality of light-emitting elements. Because the thicknesses of at least two color filter films are different, the problem of the material affecting the transmittance of the color filter film can be solved by flexibly setting the thickness of each color filter film. Furthermore, the white light obtained by synthesizing the light emitted by the plurality of light-emitting elements through the plurality of color filter films can have better brightness and less color deviation.

[0095] Figure 7 Schematic diagram of a display device provided by an embodiment of the present disclosure. Figure 7 As shown, the display device includes: a power supply component J1, and Figures 1 to 6 Any of the display modules 00 shown.

[0096] The power supply component J1 is connected to the display module 00 and is used to supply power to the display module 00 .

[0097] Optionally, the display device described in the embodiments of the present disclosure may be any product or component with a display function, such as an OLED display device, a Micro-OLED display device, a mobile phone, a tablet computer, a flexible display device, a television, and a monitor.

[0098] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0099] Furthermore, the terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure and are not intended to limit the present disclosure. Unless otherwise defined, the technical or scientific terms used in the embodiments of the present disclosure should have the common meanings understood by people with ordinary skills in the field to which the present disclosure belongs.

[0100] For example, in the embodiments of the present disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0101] Likewise, the words “a” or “an” and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

[0102] Words such as “include” or “comprising” mean that the elements or objects preceding “include” or “comprising” include the elements or objects listed after “include” or “comprising” and their equivalents, and do not exclude other elements or objects.

[0103] "Up," "down," "left," or "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. "Connected" or "coupled" refers to an electrical connection.

[0104] "And / or" indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0105] The above description is merely an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A display module, characterized in that: The display module includes: Driver backplane; a plurality of pixels located on one side of the driving backplane, wherein the pixels include a plurality of light-emitting elements; and a color filter located on a side of the plurality of pixels away from the driving backplane, the color filter comprising a plurality of color filter units corresponding one-to-one to the plurality of pixels, the color filter units comprising a plurality of color filter films corresponding one-to-one to the plurality of light-emitting elements in the pixels; Among the plurality of color filters, each color filter has a different color, at least two color filters have different thicknesses, and the at least two color filters are located at different heights close to the lower surface of the driving backplane, while each color filter is located at the same height away from the upper surface of the driving backplane; Furthermore, the driving backplane includes: a silicon-based backplane; the light-emitting element includes: an anode layer, a light-emitting material layer, and a cathode layer stacked in sequence in a direction away from the driving backplane; and the display module further includes: A pixel definition layer located on one side of the driving backplane to separate different light-emitting elements; a first encapsulation layer located between the light-emitting element and the color filter; and, a second encapsulation layer, a lens layer, and a cover plate located on a side of the color filter away from the driving backplane and stacked in sequence in a direction away from the driving backplane, the lens layer comprising a plurality of microlenses corresponding one-to-one to the plurality of color filter films; Moreover, in a direction parallel to the driving backplane bearing surface, the multiple color filters and the multiple microlenses are arranged in sequence and spaced apart; wherein, among the multiple color filters, the height difference between the lower surfaces of two adjacent color filters is less than the spacing width between the corresponding two adjacent microlenses, and is greater than the thickness of the pixel definition layer.

2. The display module according to claim 1, wherein: The pixel includes three light-emitting elements, and the color filter unit includes a red filter film, a green filter film, and a blue filter film corresponding to the three light-emitting elements one by one; Wherein, the thickness of the red filter film is the same as that of the green filter film, and is greater than that of the blue filter film; Alternatively, the thickness of the red filter film is greater than that of the green filter film, and the thickness of the green filter film is greater than that of the blue filter film.

3. The display module according to claim 1, wherein: The display module further includes: a flat layer located on a side of the color filter away from the driving backplane; And, a transparent pad layer is located on the side of the color filter close to the driving backplane, the transparent pad layer includes a transparent pad corresponding to at least one color filter film in the color filter unit, and the transparent pad is used to make the multiple color filter films in the color filter unit flush with the side close to the flat layer.

4. The display module according to claim 3, wherein: For each of the plurality of color filter films, the thickness of the transparent spacer corresponding to the color filter film is the difference between the thickness of the thickest color filter film among the plurality of color filter films and the thickness of the color filter film.

5. The display module according to claim 3, wherein: The light transmittance of the transparent cushion layer is greater than 90%.

6. The display module according to claim 3, wherein: The material of the transparent pad includes at least one of silicon nitride, aluminum oxide, polyparaxylene and silicon oxide.

7. A display device, characterized in that: The display device comprises: a power supply component, and a display module according to any one of claims 1 to 6; The power supply component is connected to the display module and is used to supply power to the display module.

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