Display module and display screen

Abstract

The utility model discloses a display module and a display screen, and relates to the technical field of display equipment. According to the scheme, based on the principle that the driving voltage of red flip chips is smaller than that of green flip chips and blue flip chips under the same driving current, a plurality of red flip chips connected in series, one green flip chip and one blue flip chip are arranged in the display module; the circuit can adapt to voltage driving of a common driving power supply, is compatible with the current electronic design in a matching manner, and avoids display color cast. Besides, the light-emitting area of the green flip chip and the light-emitting area of the blue flip chip are both larger than the light-emitting area of the red flip chip, so that the use of a large-size red flip chip with higher cost is avoided on the basis of ensuring the normal display effect, the cost is reduced, and the outdoor or semi-outdoor display requirement is met at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of display equipment, in particular to a display module and a display screen. Background Art

[0002] At present, most of the packaged Micro LED technology (Micro LED in Package, MiP) display modules or chip-on-board (Chip-On-Board, COB) display modules are used indoors due to their brightness and cost, and are rarely used outdoors or semi-outdoors.

[0003] In order to meet the high brightness requirements of outdoor and semi-outdoor displays, there are large-size flip chips customized with 1R1G1B, and there are also flip chips customized with 2R2G2B. The brightness of the display screens composed of both can meet the requirements of outdoor or semi-outdoor. However, the large-size flip chips customized with 1R1G1B are more expensive, and the flip chips customized with 2R2G2B have poor compatibility with electronic designs, resulting in poor display effects.

[0004] In view of the above problems, how to solve the high cost and poor display effect of the current flip chip used for outdoor or semi-outdoor display is an urgent problem to be solved by technicians in this field. Utility Model Content

[0005] The utility model aims to provide a display module and a display screen to solve the problem that the current flip chip used for outdoor or semi-outdoor display has high cost and poor display effect.

[0006] In order to solve the above technical problems, the utility model provides a display module, comprising: a plurality of display components and a PCB board; the display components specifically include a red display component, a green display component and a blue display component;

[0007] Each of the display components is electrically connected to the PCB board;

[0008] Among them, the red display component includes multiple red flip chips connected in series, the green display component includes a green flip chip, and the blue display component includes a blue flip chip; the light-emitting area of ​​the green flip chip and the light-emitting area of ​​the blue flip chip are both larger than the light-emitting area of ​​the red flip chip.

[0009] On the one hand, the number of the red flip chips in the red display component is 2, and they are arranged side by side in the same plane.

[0010] On the other hand, there are a plurality of display modules consisting of one red display component, one green display component and one blue display component on one side of the PCB board;

[0011] Wherein, the display components in the display module are arranged in parallel.

[0012] On the other hand, the display modules are arranged in a matrix on one side of the PCB board.

[0013] In another aspect, it also includes: a plurality of drive devices;

[0014] Each of the driving devices corresponds to each of the display components, and is electrically connected to the corresponding display component.

[0015] On the other hand, each of the driving devices is disposed on another surface of the PCB board opposite to each of the display modules.

[0016] In another aspect, it also includes: a plurality of white display components;

[0017] Each of the white display components is correspondingly disposed in each of the display modules and is arranged in parallel with the other display components in the display module.

[0018] On the other hand, the light emitting area of ​​the red flip chip ranges from 3 mil×5 mil to 4 mil×8 mil.

[0019] On the other hand, the red display component, the green display component and the blue display component have the same length in the direction in which the red flip chips are connected in series.

[0020] In order to solve the above technical problems, the utility model also provides a display screen, including the above display module.

[0021] The utility model provides a display module, including multiple display components and a PCB board; the display component specifically includes a red display component, a green display component and a blue display component; each display component is electrically connected to the PCB board; wherein, the red display component includes multiple red flip chips connected in series, the green display component includes a green flip chip, and the blue display component includes a blue flip chip; the light-emitting area of ​​the green flip chip and the light-emitting area of ​​the blue flip chip are both greater than the light-emitting area of ​​the red flip chip. It can be seen that the above scheme is based on the principle that the driving voltage of the red flip chip is less than the driving voltage of the green flip chip and the blue flip chip under the same driving current. By setting multiple red flip chips connected in series, a green flip chip and a blue flip chip in the display module, it can adapt to the voltage drive of the commonly used driving power supply, match and be compatible with the current electronic design, and avoid display color cast. In addition, the light-emitting area of ​​the green flip chip and the light-emitting area of ​​the blue flip chip are both greater than the light-emitting area of ​​the red flip chip, and the use of large-size red flip chips with high cost is avoided on the basis of ensuring the normal display effect, which not only reduces the cost, but also meets the display needs of outdoor or semi-outdoor.

[0022] In addition, the utility model also provides a display screen, including the above display module, with the same effect as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a display module provided by an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of an outdoor or semi-outdoor display screen based on MiP provided by an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of an outdoor or semi-outdoor display screen based on COB provided by an embodiment of the utility model;

[0027] Figure 4 A schematic diagram of another display module provided by an embodiment of the utility model.

[0028] Among them, 10 is a PCB board, 11 is a red display component, 12 is a green display component, 13 is a blue display component, 14 is a MiP device, and 15 is a white display component. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0030] The core of the utility model is to provide a display module and a display screen to solve the problem that the current flip chip used for outdoor or semi-outdoor display has high cost and poor display effect.

[0031] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] At present, in order to meet the high brightness requirements of outdoor and semi-outdoor displays, there are large-size flip chips customized with 1R1G1B, and there are also flip chips customized with 2R2G2B. The brightness of the display screens composed of both can meet the requirements of outdoor or semi-outdoor. However, the large-size flip chips customized with 1R1G1B require customized development, are used in small quantities, and have high cost prices. Although the flip chips customized with 2R2G2B can reduce costs, they have poor compatibility with electronic design, resulting in poor display effects; for example, the current common driving power supply voltage of LED display screens is between 3.8V and 5.0V, and the maximum operating voltage of electronic devices such as bus transceivers, row tubes, and driver ICs is 5.0V, while the driving voltage of the 2R2G2B series combination requires about 5.5V, and the driving voltage of the green flip chip and the blue flip chip even reaches more than 6V. Therefore, the voltage of the 2R2G2B series combination does not match the power supply voltage, resulting in insufficient voltage for green and blue, and easy color cast.

[0033] In view of the above problems, the utility model provides a display module. Figure 1 A schematic diagram of a display module provided by an embodiment of the utility model. Figure 1 As shown, the display module includes: a plurality of display components and a printed circuit board (PCB), namely, a PCB board 10; the display components specifically include a red display component 11, a green display component 12 and a blue display component 13;

[0034] Each display component is electrically connected to the PCB board 10;

[0035] Among them, the red display component 11 includes multiple red flip chips connected in series, the green display component 12 includes a green flip chip, and the blue display component 13 includes a blue flip chip; the light-emitting area of ​​the green flip chip and the light-emitting area of ​​the blue flip chip are both larger than the light-emitting area of ​​the red flip chip.

[0036] Specifically, the display module provided by the utility model is composed of a plurality of display components and a PCB board 10, and each display component is electrically connected to the PCB board 10. Among them, the display components specifically include a red display component 11, a green display component 12 and a blue display component 13, and a single pixel structure is formed by a red display component 11, a green display component 12 and a blue display component 13. At the same time, Figure 1 As shown, the red display component 11 includes a red flip chip (R), the green display component 12 includes a green flip chip (G), and the blue display component 13 includes a blue flip chip (B).

[0037] Table 1 is a voltage diagram of a dual-crystal MiP / COB at a 3mA drive current;

[0038]

[0039] As shown in Table 1, under the premise of a certain driving current, among the three types of chips, red flip chip, green flip chip and blue flip chip, the forward driving voltage of the red flip chip is the smallest. At the same time, considering that the cost of the red flip chip is the highest among the three flip chips of the same size, therefore, in the present utility model, the red display component 11 specifically includes a plurality of red flip chips connected in series, the green display component 12 specifically includes a green flip chip, and the blue display component 13 specifically includes a blue flip chip. Through the above-mentioned setting method, the display module adapts to the voltage drive of the commonly used driving power supply, is compatible with the current electronic design, and avoids display color cast.

[0040] In addition, in order to meet the requirements of outdoor or semi-outdoor display, in the present invention, the light-emitting area of ​​the green flip chip and the light-emitting area of ​​the blue flip chip are both larger than the light-emitting area of ​​the red flip chip, that is, the size of the green flip chip and the size of the blue flip chip are both larger than the size of the red flip chip. In this way, the light-emitting brightness of multiple red flip chips is the same as the light-emitting brightness of one green flip chip and one blue flip chip, thereby meeting the requirements of outdoor or semi-outdoor display and avoiding display color cast.

[0041] It should be noted that in this embodiment, there is no restriction on the specific number of red flip chips, but it is necessary to ensure that the driving voltage of multiple red flip chips connected in series is adapted to the voltage drive of a commonly used driving power supply; there is no restriction on the specific sizes of the three chips, the red flip chip, the green flip chip and the blue flip chip, but it is necessary to ensure that the size of the red flip chip does not require customized development, thereby reducing the chip cost, depending on the specific implementation situation.

[0042] In this embodiment, based on the principle that the driving voltage of the red flip chip is lower than the driving voltage of the green flip chip and the blue flip chip under the same driving current, by setting a plurality of red flip chips connected in series, a green flip chip and a blue flip chip in the display module, it is possible to adapt to the voltage drive of the commonly used driving power supply, match and be compatible with the current electronic design, and avoid display color cast. In addition, the light-emitting area of ​​the green flip chip and the light-emitting area of ​​the blue flip chip are both larger than the light-emitting area of ​​the red flip chip, and the use of the high-cost large-size red flip chip is avoided on the basis of ensuring the normal display effect, which not only reduces the cost, but also meets the outdoor or semi-outdoor display requirements.

[0043] On the basis of the above embodiments, in some embodiments, the number of red flip chips in the red display component 11 is 2, and they are arranged side by side in the same plane.

[0044] Table 2 is a schematic diagram of voltage values ​​of a display module under 3Ma and 5Ma driving currents;

[0045]

[0046] Table 2 shows the driving voltages of the three display components at two different driving currents of 3mA and 5mA when the number of red flip chips is 2. As shown in Table 2, under the two driving currents, the driving voltages of the three flip chips are all below 5V, which is in line with the voltage drive of the commonly used driving power supply. At the same time, since only two red flip chips are provided in the red display component 11, the chip cost is greatly reduced.

[0047] On the basis of the above embodiments, in some embodiments, there are multiple display modules consisting of a red display component 11, a green display component 12 and a blue display component 13 on one side of the PCB board 10;

[0048] Among them, the display components in the display module are arranged in parallel.

[0049] In order to display better, in this embodiment, there are multiple display modules consisting of a red display component 11, a green display component 12 and a blue display component 13 on one side of the PCB board 10, and the display module is a single pixel structure. The display components in the display module are arranged in parallel, so that the display effect of the display module is balanced. At the same time, in the specific implementation, the red display component, the green display component and the blue display component of the display module can be set to have the same length in the direction of the series connection of each red flip chip, so as to avoid the light monochromatic overflow phenomenon caused by the inconsistent length of the light-emitting element.

[0050] In addition, in order to ensure the display effect of the display screen, the display modules are arranged in a matrix on one side of the PCB board 10. Since each display module is a pixel, the colors displayed by the multiple display components in each display module are different, so the brightness adjustment between the multiple display components can make a display module display richer colors, and then make the display screen composed of multiple display modules display complex images.

[0051] In order to drive each display component in each display module, the display module also includes multiple driving devices; each driving device corresponds to each display component, and is electrically connected to the corresponding display component, so as to drive the corresponding display component. At the same time, in order to better set the driving device and avoid the driving device affecting the display of the display module, each driving device is specifically set on the other surface of the PCB board 10 opposite to each display module, so as to avoid affecting the display of the display module. The following is a process for making an outdoor display screen based on the above embodiment:

[0052] Figure 2 A schematic diagram of an outdoor or semi-outdoor display screen based on MiP provided in an embodiment of the utility model. Figure 2The outdoor or semi-outdoor MiP display screen shown first needs to design and manufacture the carrier circuit; wherein, the carrier can be a glass or (Bismaleimide Triazine, BT) resin board, and its thickness is generally 0.1mm to 0.2mm. Further, the carrier die bonding is performed; based on the above embodiment, each pixel is composed of 2 red flip chips, 1 green flip chip and 1 blue flip chip. Then, molded sealing is performed to protect the chips on the carrier by the sealing, and the thickness of the glue is generally 0.12mm to 0.25mm, so as to obtain a full-page MiP. The full-page MiP is cut into multiple MIP devices 14, and each MiP device 14 is tested, sorted and packaged. Further, the light board PCB driver patch is performed, and the driving electronic components are manufactured and processed based on the PCB board 10; at the same time, the light board PCB lamp surface MiP patch is performed, and each MiP device 14 is attached to the PCB board 10. After the patch is completed, the light board PCB lamp surface is molded, and the general sealing glue thickness is 0.25mm to 0.5mm. Then the light board PCB process edge cutting is carried out to obtain the display module, and the display module surface is nano-sprayed to achieve UV resistance, moisture resistance and matte treatment. Finally, multiple display modules are assembled into a box, and multiple boxes are spliced ​​into a display screen to obtain an outdoor or semi-outdoor MiP display screen.

[0053] Figure 3 A schematic diagram of an outdoor or semi-outdoor display screen based on COB provided in an embodiment of the utility model. Figure 3 The outdoor or semi-outdoor COB display screen shown first requires the design and production of the light board PCB circuit. Further, the light board PCB driver patch and the light board PCB lamp surface are solid-die welded. Based on the above embodiment, each pixel is composed of 2 red flip chips, 1 green flip chip and 1 blue flip chip. Then, molded sealing is performed to protect the chip on the carrier board. The thickness of the glue is generally 0.15mm to 0.35mm. Further, the light board PCB process edge cutting is performed to output the COB display module, and the surface of the COB display module is nano-sprayed for anti-ultraviolet, moisture-proof and matte treatment. Finally, multiple COB display modules are assembled into a box, and multiple boxes are spliced ​​into a display screen to obtain a COB display screen for outdoor or semi-outdoor use.

[0054] Figure 4 A schematic diagram of another display module provided by an embodiment of the utility model. In order to improve the display brightness of the display module, based on the above embodiments, in some embodiments, such as Figure 4 As shown, the display module further includes: a plurality of white display components 15;

[0055] Each white display component 15 is respectively disposed in each display module and arranged in parallel with the other display components in the display module. Thus, each display module includes a red display component 11, a green display component 12, a blue display component 13 and a white display component 15. By adding the white display component 15, the display brightness of the display module can be effectively improved to adapt to the display scene under strong light outdoors or semi-outdoors.

[0056] Based on the above embodiments, in some embodiments, the light emitting area of ​​the red flip chip ranges from 3mil×5mil to 4mil×8mil. It can be understood that the size of the mainstream flip chip in the industry is 3mil×5mil to 4mil×8mil. By using the mainstream red flip chip in the industry, the utility model can avoid the high cost caused by customized chip development.

[0057] At the same time, the light-emitting area of ​​the green flip chip and the light-emitting area of ​​the blue flip chip in this embodiment are both greater than 4mil×8mil. That is to say, the green flip chip and the blue flip chip in the utility model are not mainstream flip chips in the industry, but large-size flip chips developed by customization. Since the cost of large-size customized development of green flip chips and blue flip chips is lower than that of customized development of red flip chips, by using large-size green and blue flip chips that are not mainstream in the industry, not only can the chip cost be controlled, but also the display effect is excellent, which meets the outdoor or semi-outdoor display requirements of the display screen.

[0058] Finally, the utility model also provides a display screen, including the display module in the above embodiment. Specifically based on the principle that the driving voltage of the red flip chip is less than the driving voltage of the green flip chip and the blue flip chip under the same driving current, by setting a plurality of red flip chips connected in series, a green flip chip and a blue flip chip in the display module, it can adapt to the voltage drive of the commonly used driving power supply, match and be compatible with the current electronic design, and avoid display color cast. In addition, the light-emitting area of ​​the green flip chip and the light-emitting area of ​​the blue flip chip are both larger than the light-emitting area of ​​the red flip chip, and the use of large-sized red flip chips with higher costs is avoided on the basis of ensuring the normal display effect, which not only reduces the cost, but also meets the outdoor or semi-outdoor display needs.

[0059] The above is a detailed introduction to a display module and display screen provided by the utility model. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the utility model.

[0060] It should also be noted that relational terms such as first and second, etc. in the specification are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A display module, characterized in that: include: A plurality of display components and PCB boards; the display components specifically include a red display component, a green display component and a blue display component; Each of the display components is electrically connected to the PCB board; Among them, the red display component includes multiple red flip chips connected in series, the green display component includes a green flip chip, and the blue display component includes a blue flip chip; the light-emitting area of ​​the green flip chip and the light-emitting area of ​​the blue flip chip are both larger than the light-emitting area of ​​the red flip chip.

2. The display module according to claim 1, characterized in that: The number of the red flip chips in the red display component is 2, and they are arranged side by side in the same plane.

3. The display module according to claim 1, characterized in that: On one side of the PCB board, there are a plurality of display modules consisting of one red display component, one green display component and one blue display component; Wherein, the display components in the display module are arranged in parallel.

4. The display module according to claim 3, characterized in that: The display modules are arranged in a matrix on one surface of the PCB board.

5. The display module according to claim 4, characterized in that: Also includes: Multiple drive devices; Each of the driving devices corresponds to each of the display components, and is electrically connected to the corresponding display component.

6. The display module according to claim 5, characterized in that: Each of the driving devices is arranged on another surface of the PCB board opposite to each of the display modules.

7. The display module according to claim 3, characterized in that: Also includes: a plurality of white display components; Each of the white display components is correspondingly disposed in each of the display modules and is arranged in parallel with the other display components in the display module.

8. The display module according to any one of claims 1 to 7, characterized in that: The light emitting area of ​​the red flip chip ranges from 3 mil×5 mil to 4 mil×8 mil.

9. The display module according to claim 3, characterized in that: The red display component, the green display component and the blue display component have the same length in the direction in which the red flip chips are connected in series.

10. A display screen, characterized in that: A display module comprising any one of claims 1 to 9.

Images