Display device

Abstract

The present application provides a display device, comprising an active light emitting package and a plurality of passive light emitting packages. The active light emitting package comprises a light emitting driving wafer and at least one first light emitting element electrically connected to the light emitting driving wafer. The plurality of passive light emitting packages are electrically connected to the active light emitting package and each comprises at least one second light emitting element. Wherein, the light emitting driving wafer is configured to drive each first light emitting element and each second light emitting element.

Description

Technical Field

[0001] This invention relates to a display device, and more particularly to a display device with high assembly flexibility, high maintainability and high reliability. Background Technology

[0002] In direct-view LED (DVLED) display applications, a complete display system typically consists of multiple LED boards. Each pixel contains at least three colors of LED chips, and the number of three-color LED chips on each LED board can reach hundreds of thousands to millions. These LED chips require driving circuits to control the brightness and switching of the LEDs.

[0003] In the aforementioned display applications, driving methods can be categorized into centralized and distributed approaches. For example, in existing DVLEDs using centralized driving, a single driving circuit can control 1920 LEDs through matrix scanning (taking 16 scan lines and 120 channels as an example), forming 640 pixels. The advantage of centralized driving is a smaller number of driver ICs, but its wiring is complex, and a single LED failure can cause LEDs on the same scan line to remain constantly lit, a phenomenon commonly known as the "caterpillar effect." While distributed driving reduces the number of lines and avoids the caterpillar effect, it increases the number of driving circuits required.

[0004] In addition, both centralized and distributed drive architectures are susceptible to wiring complexity and LED failures, and the pixel spacing of the products is fixed and difficult to adjust, affecting material preparation and cost control.

[0005] Therefore, it is necessary to design a new type of display device to overcome the above-mentioned defects. Summary of the Invention

[0006] The purpose of this invention is to provide a display device that has good maintainability and reliability when assembling pixel structures, while reducing material costs.

[0007] To achieve the above objectives, the present invention provides a display device comprising: an active light-emitting package including: a light-emitting driver chip; and at least one first light-emitting element electrically connected to the light-emitting driver chip; and a plurality of passive light-emitting packages electrically connected to the active light-emitting package, each passive light-emitting package including at least one second light-emitting element; wherein the light-emitting driver chip is configured to drive each of the first light-emitting elements and each of the second light-emitting elements.

[0008] Preferably, the active light-emitting package has multiple contacts, and the light-emitting driver chip is electrically connected to the multiple passive light-emitting packages through the multiple contacts.

[0009] Preferably, the number of the plurality of contacts is greater than or equal to the number of the plurality of passive light-emitting packages.

[0010] Preferably, the active light-emitting package and the plurality of passive light-emitting packages are disposed on a circuit board to form a lamp board module. The circuit board includes a plurality of circuit traces for coupling the plurality of passive light-emitting packages to the plurality of contacts respectively.

[0011] Preferably, the plurality of passive light-emitting packages and the active light-emitting package are each separated by a plurality of predetermined distances, and at least a portion of the plurality of predetermined distances are equal to each other.

[0012] Preferably, the display device also includes a plurality of lamp panel modules connected to each other.

[0013] Preferably, each of the lamp panel modules is provided with a predetermined number of the plurality of passive light-emitting packages, and the predetermined number of at least a portion of the plurality of lamp panel modules is different.

[0014] Preferably, the plurality of passive light-emitting packages are arranged around the active light-emitting package, and the number of the plurality of passive light-emitting packages is three, and they are arranged together with the active light-emitting package to form a 2*2 array.

[0015] Preferably, the plurality of passive light-emitting packages are arranged around the active light-emitting package, and the number of the plurality of passive light-emitting packages is four, and they are arranged in a cross shape with the active light-emitting package.

[0016] Preferably, the plurality of passive light-emitting packages are arranged around the active light-emitting package, and the number of the plurality of passive light-emitting packages is eight, and they are arranged together with the active light-emitting package to form a 3*3 array.

[0017] Preferably, the plurality of passive light-emitting packages are arranged around the active light-emitting package, the number of the plurality of passive light-emitting packages is fifteen, and they are arranged together with the active light-emitting package to form a 4*4 array.

[0018] Preferably, the display panel is also included, wherein the number of passive light-emitting encapsulations disposed in the lamp panel module at the edge of the display panel is different from the number of passive light-emitting encapsulations disposed in the lamp panel module not disposed at the edge of the display panel.

[0019] Preferably, the active light-emitting package includes at least a contact coupled to the plurality of passive light-emitting packages and at least one contact electrically connected to the drive controller.

[0020] Compared with existing technologies, the display device provided in this invention, because the active light-emitting package can drive the first light-emitting element and multiple light-emitting elements respectively, can avoid the caterpillar effect when a single light-emitting element fails. Furthermore, the spacing between pairs of light-emitting elements or the spacing of pixels formed by multiple light-emitting elements can be freely adjusted as needed, providing high customization flexibility and overcoming the limitations of fixed spacing. In the display device provided by this invention, the active light-emitting package can be arbitrarily arranged and combined with multiple undriven passive light-emitting packages at the pixel position to form the required spacing shape or cluster size, allowing users to freely assemble pixel structures according to their needs. Therefore, it has good maintainability and reliability, and can also reduce material costs. Attached Figure Description

[0021] Figure 1 This is a functional block diagram of a display device according to an embodiment of the present invention.

[0022] Figure 2 This is an exploded view of the components of a display panel according to an embodiment of the present invention.

[0023] Figure 3 This is a top view of multiple lamp panel modules assembled according to an embodiment of the present invention.

[0024] Figure 4 This is a first top view of one of the light panel modules according to an embodiment of the present invention.

[0025] Figure 5 This is a second top view of one of the light panel modules according to an embodiment of the present invention.

[0026] Figure 6 This is a third top view of one of the light panel modules according to an embodiment of the present invention.

[0027] Figure 7 This is a fourth top view of one of the light panel modules according to an embodiment of the present invention.

[0028] Figure 8 This is a fifth top view of one of the light panel modules according to an embodiment of the present invention. Detailed Implementation

[0029] To provide a further understanding of the purpose, structure, features and functions of the present invention, detailed descriptions are provided below with reference to embodiments.

[0030] The following specific embodiments illustrate the implementation of the "display device" disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention. In addition, the term "or" as used herein may include, depending on the actual situation, any combination of any one or more of the associated listed items.

[0031] Figure 1 This is a functional block diagram of a display device according to an embodiment of the present invention. (See attached diagram.) Figure 1 As shown, this embodiment of the invention provides a display device 1. The display device 1 can be, for example, a direct-view light-emitting diode (DVLED) display commonly used in large advertising billboards. Figure 1 As shown, the display device 1 may include components such as a display panel 10, a drive controller 11, an image processing circuit 12, a storage circuit 13, a signal input interface 14, and a power module 15. The power module 15 may be, for example, a power supply including a power converter, used to provide the required stable voltage to the display panel 10, the drive controller 11, the image processing circuit 12, the storage circuit 13, and the signal input interface 14.

[0032] The signal input interface 14 is electrically connected to the image processing circuit 12, the image processing circuit 12 is electrically connected to the storage circuit 13 and the drive controller 11, and the drive controller 11 is electrically connected to the display panel 10.

[0033] The signal input interface 14 may be, for example, an HDMI, DisplayPort, or DVI interface module, used to provide external video signal input, such as receiving input signals from a computer, media player, or video transmission device. The signal input interface 14 may also support various video formats, such as HDMI, DisplayPort, DVI, SDI, USB-C, etc.

[0034] The storage circuit 13 can be used to store the firmware and / or software required for the operation of the display device 1, as well as display configuration parameters (such as color correction data and brightness correspondence curves). In some embodiments, the storage circuit 13 can also store video playback content to provide offline playback functionality. The storage circuit 13 can be, for example, a NAND flash memory, an electrically erasable programmable read-only memory (EEPROM), an SD card, or an eMMC memory module.

[0035] The image processing circuit 12 is primarily responsible for processing and transmitting image signals. For example, the image processing circuit 12 can receive video data from the signal input interface 14 and transmit the processed image data to the drive controller 11. It can also access image data or setting parameters stored in the storage circuit 13. The image processing circuit 12 can be used to perform resolution adjustment, frame synchronization, color correction, HDR processing, grayscale adjustment, flicker removal, multi-screen splicing, and seamless boundary correction on image signals to improve display quality.

[0036] The drive controller 11 receives data signals from the image processing circuit 12 and converts them into LED drive signals. For example, the drive controller 11 can control the LED brightness using PWM (Pulse Width Modulation) or current regulation technology. For instance, the drive controller 11 can select a suitable driving method, such as static driving or dynamic scan driving, based on the dot pitch and refresh rate of the display panel 10. The drive controller 11 is also configured to parse image signals, convert them into displayable data, and control the display mode of the display panel 10.

[0037] The display panel 10 may be, for example, a self-emissive display panel, wherein each pixel may be provided with at least one light-emitting element, so that each pixel can emit light on its own. Therefore, unlike liquid crystal display (LCD) devices, since no backlight unit, liquid crystal layer or similar components are required, a smaller thickness can be achieved, and due to the simplicity of the structure, various design changes can be made.

[0038] Furthermore, the display panel 10 can employ micro light-emitting diodes (MicroLEDs) as the light-emitting elements in each pixel. By employing MicroLEDs, the pixel size can be reduced, and higher resolution can be achieved within the same screen size.

[0039] Figure 2 This is an exploded view of the components of a display panel according to an embodiment of the present invention. Figure 3 This is a top view of multiple lamp panel modules assembled according to an embodiment of the present invention. Figure 2 , 3As shown, the display panel 10 may include a housing 100 and multiple lamp panel modules 102. The multiple lamp panel modules 102 can be interconnected in a two-dimensional matrix, and the housing 100 can be used to support the multiple lamp panel modules 102. However, exemplary embodiments of the display panel 10 are not limited to this. As an example, the display panel 10 may be formed from a single lamp panel module 102. In some embodiments, these lamp panel modules 102 may be magnetically or mechanically coupled to each other, or bonded together with adhesive, and installed in the housing 100. Components such as a drive controller 11, an image processing circuit 12, a storage circuit 13, a signal input interface 14, and a power module 15 may also be disposed in the housing 100.

[0040] The lamp panel module 102 may include a circuit board CB, and an active light-emitting package AP and a plurality of passive light-emitting packages PP disposed on the circuit board CB. For example, the active light-emitting package AP and the plurality of passive light-emitting packages PP may be disposed on the circuit board CB to form one of the lamp panel modules 102. In some embodiments, the lamp panel module 102 may also include a plurality of active light-emitting packages AP and a plurality of passive light-emitting packages PP.

[0041] Figure 4 This is a first top view of one of the light panel modules according to an embodiment of the present invention. Please refer to... Figure 4 The active light-emitting package (AP) may include a light-emitting driver chip (CP) and at least one first light-emitting element (E1) electrically connected to the light-emitting driver chip (CP). In some embodiments, red (R), green (G), and blue (B) tri-color light-emitting diode (LED) chips can be directly soldered onto a printed circuit board (PCB) using surface mount technology (SMT) to function as a pixel capable of independently emitting light and mixing different colors, thereby achieving high-density full-color display.

[0042] Furthermore, active-matrix LED (AP) packages can also integrate multiple MicroLED chips into a single package using MicroLED in Package (MiP) technology. Alternatively, AP packages can also integrate multiple RGB LED units into a single package unit using Integrated Matrix Device (IMD) technology. In other words, multiple pixels can be directly integrated into a single package unit, increasing pixel density.

[0043] In an active-matrix LED package (AP), a light-emitting driver chip (CP) and at least one first light-emitting element (E1) electrically connected to the light-emitting driver chip (CP) can be disposed on a package substrate (SB1), such as a ceramic substrate or an FR4 substrate. The active-matrix LED package (AP) may also have multiple contacts (e.g., solder pads) formed on the package substrate (SB1), and the light-emitting driver chip (CP), the first light-emitting element (E1), and the multiple contacts may be formed on the same side or different sides of the package substrate (SB1). The number of multiple contacts in the active-matrix LED package (AP) is greater than or equal to the number of multiple passive-matrix LED packages (PP). Furthermore, the surface of the package substrate (SB1) on which the light-emitting element (E1) and the light-emitting driver chip (CP) are disposed may be further covered with silicone or epoxy resin as a protective layer to improve reliability and durability.

[0044] The passive light-emitting package (PP) is electrically connected to the active light-emitting package (AP), and each includes at least one second light-emitting element (E2). Similarly, the passive light-emitting package (PP) can directly solder R, G, and B three-color LED chips onto the PCB via SMT, integrate multiple MicroLED chips into a single package via MiP technology, or integrate multiple RGB LED units into a single package unit via IMD technology.

[0045] In the passive light-emitting package PP, at least one second light-emitting element E2 may be disposed on the package substrate SB2, for example, a ceramic substrate or an FR4 substrate. The passive light-emitting package PP also has multiple contacts (e.g., solder pads) formed on the package substrate SB2, and the second light-emitting element E2 and the multiple contacts may be formed on the same side or different sides of the package substrate SB2.

[0046] by Figure 4 For example, when the active light-emitting package AP and the passive light-emitting package PP are disposed on the circuit board CB, multiple passive light-emitting packages PP can be coupled to multiple contacts of the active light-emitting package AP through multiple circuit traces of the circuit board CB.

[0047] It should be noted that the active light-emitting package (AP) can be equipped with a light-emitting driver chip (CP) with corresponding driving capabilities, depending on the number of the first light-emitting elements (E1) and the second light-emitting elements (E2) to be driven. The light-emitting driver chip (CP) may include a constant current driving circuit (e.g., a current source circuit), a dimming control circuit, a power management circuit, a grayscale control circuit, a communication interface, and a protection circuit. The constant current driving circuit provides a stable current to the first light-emitting elements (E1) and the second light-emitting elements (E2) to be driven, ensuring uniform brightness. The dimming control circuit can, for example, use pulse width modulation (PWM) dimming technology to control the brightness, color, and contrast of the LEDs. The power management circuit is electrically connected to the power module 15 and can be, for example, a buck, boost, or buck-boost power converter circuit to provide a suitable voltage to the first light-emitting elements (E1) and the second light-emitting elements (E2) to be driven. The grayscale control circuit can use grayscale current adjustment technology to control grayscale, enhancing the color gradation of the first light-emitting elements (E1) and the second light-emitting elements (E2) to be driven. The communication interface may be, for example, a serial communication interface, used to provide communication capability between the light-emitting driver chip CP and the driver controller 11, and to allow the brightness, color, and mode to be set through the driver controller 11. The protection circuit may include, for example, one or more of the following: overvoltage protection circuit, overcurrent protection circuit, and thermal protection circuit, to ensure that the first light-emitting element E1 and the second light-emitting element E2 to be driven can operate stably for a long time and prevent abnormal conditions such as overheating, overcurrent, and short circuit.

[0048] like Figure 4 As shown, in this embodiment, the lamp panel module 102 may be provided with a predetermined number of passive light-emitting encapsulators PP, for example, three. However, the number of passive light-emitting encapsulators PP in multiple lamp panel modules 102 may be the same or different. For example, the number of passive light-emitting encapsulators PP in at least one lamp panel module 102 located at the edge of the display panel 10 may be different from the number of passive light-emitting encapsulators PP in lamp panel modules 102 not located at the edge.

[0049] like Figure 4As shown, the passive light-emitting package PP is arranged around the active light-emitting package AP. Since the total number of active light-emitting packages AP and passive light-emitting packages PP is four, they can be arranged, for example, in a 2*2 array. The active light-emitting package AP can be separated from the three passive light-emitting packages PP by multiple distances D11, D12, and D13, at least some of which are equal. For example, distances D11 and D13 are equal, but distance D12 is different from distances D11 and D13. In some embodiments, the active light-emitting package AP and passive light-emitting packages PP can be arranged in a square matrix, that is, forming an array with an equal number of columns and rows. Furthermore, the active light-emitting package AP includes at least three contacts coupled to the passive light-emitting packages PP and at least one contact electrically connected to the drive controller 11.

[0050] Furthermore, the light-emitting driver chip CP of the active-matrix LED (AP) can be used to drive the second light-emitting elements E2 of the three passive-matrix LEDs (PP). This configuration improves design and manufacturing efficiency due to the reduced number of circuits and simplified routing. Additionally, since the AP drives the first light-emitting element E1 and multiple light-emitting elements E2 separately, the "caterpillar effect" (or "spider web effect") can be avoided when a single light-emitting element fails. Moreover, the spacing between pairs of light-emitting elements or the spacing of pixels formed by multiple light-emitting elements can be freely adjusted as needed, providing high customization flexibility and overcoming the limitations of fixed spacing.

[0051] Furthermore, in the display device 1 of the present invention, the active light-emitting package AP can be arbitrarily arranged and combined with multiple undriven passive light-emitting packages PP at the pixel position according to the wiring characteristics of different types of circuit boards CB (e.g., breadboard with fixed-pitch contact configuration) to create the required spacing shape or cluster size, allowing users to freely assemble the pixel structure according to their needs. Therefore, it can have good maintainability and reliability, and can also reduce material costs.

[0052] Figure 5 This is a second top view of one of the light panel modules according to an embodiment of the present invention. Please refer to... Figure 5In another configuration, four passive light-emitting packages (PPs) are arranged around an active light-emitting package (AP), forming a cross shape with the AP. For example, the four passive PPs can be positioned above, below, to the left, and to the right of the AP, respectively, at distances D21, D22, D23, and D24. At least a portion of these distances D21, D22, D23, and D24 are equal. In this embodiment, for example, distances D21, D22, D23, and D24 are equal. Furthermore, the AP includes at least four contacts coupled to the passive PPs and one contact electrically connected to the drive controller 11.

[0053] Figure 6 This is a third top view of one of the light panel modules according to an embodiment of the present invention. Please refer to... Figure 6 The passively emitting package (PP) and the active emitting package (AP) can be arranged in a cross shape in another way. For example, four passively emitting packages (PP) can be respectively positioned at the upper left, lower left, upper right, and lower right of the active emitting package (AP), and at distances D21, D22, D23, and D24 from the active emitting package (AP), respectively. At least a portion of distances D21, D22, D23, and D24 are equal to each other. Taking this embodiment as an example, distances D21, D22, D23, and D24 are equal to each other.

[0054] Figure 7 This is a fourth top view of one of the light panel modules according to an embodiment of the present invention. Please refer to... Figure 7 In another configuration, eight passively emitting packages (PPs) are arranged around an active emitting package (AP), forming a 3x3 array. For example, the eight PPs can be positioned at the upper left, left, lower left, upper, lower, upper right, right, and lower right of the AP, respectively, at distances D31, D32, D33, D34, D35, D36, D37, and D38 from the AP. At least a portion of these distances (D31, D32, D33, D34, D35, D36, D37, and D38) are equal. Taking this embodiment as an example, the distances D31, D33, D36, and D38 are equal to each other, and the distances D32, D34, D35, and D37 are equal to each other, but the distances D31, D33, D36, and D38 are different from the distances D32, D34, D35, and D37.

[0055] Figure 8 This is a fifth top view of one of the light panel modules according to an embodiment of the present invention. Please refer to... Figure 8In another configuration, passive light-emitting packages (PPs) are arranged around active light-emitting packages (APs), with fifteen PPs forming a 4x4 array. Similar to the aforementioned embodiments, the spacing between any two elements in the 4x4 array can be arbitrarily determined according to requirements. It should be noted that users can refer to the above... Figures 4 to 8 One or more of the light panel modules 102 can be selected and combined to arbitrarily arrange and combine the active light-emitting package AP and multiple undriven passive light-emitting packages PP at the pixel position to form the required spacing shape or cluster size, and freely perform pixel structure assembly.

[0056] In summary, the display device provided by this invention includes an active light-emitting package and multiple passive light-emitting packages. The active light-emitting package includes a light-emitting driver chip and at least one first light-emitting element electrically connected to the light-emitting driver chip. The multiple passive light-emitting packages are electrically connected to the active light-emitting package and each includes at least one second light-emitting element. The light-emitting driver chip is configured to drive each first light-emitting element and each second light-emitting element. Since the active light-emitting package can drive the first light-emitting element and multiple light-emitting elements separately, the caterpillar effect can be avoided when a single light-emitting element fails. Furthermore, the spacing between pairs of light-emitting elements or the spacing of pixels formed by multiple light-emitting elements can be freely adjusted as needed, providing high customization flexibility and overcoming the limitations of fixed spacing. In addition, in the display device provided by this invention, the active light-emitting package can be arbitrarily arranged and combined with multiple undriven passive light-emitting packages at the pixel position to form the required spacing shape or cluster size, allowing users to freely assemble pixel structures according to their needs. Therefore, it has good maintainability and reliability, and can also reduce material costs.

[0057] Although the invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the invention and should not be construed as limiting the invention. The scale in the schematic drawings does not represent the actual proportions of the components, in order to clearly describe the required parts.

[0058] The present invention has been described in the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A display device, characterized in that, include: Active light-emitting package, including: Light-emitting driver chip; and At least one first light-emitting element is electrically connected to the light-emitting driving chip; and Multiple passive light-emitting packages are electrically connected to the active light-emitting package, and each passive light-emitting package includes at least one second light-emitting element; The light-emitting driver chip is configured to drive each of the first light-emitting elements and each of the second light-emitting elements.

2. The display device as claimed in claim 1, characterized in that, The active light-emitting package has multiple contacts, and the light-emitting driver chip is electrically connected to the multiple passive light-emitting packages through these multiple contacts.

3. The display device as claimed in claim 2, characterized in that, The number of multiple contacts is greater than or equal to the number of multiple passive light-emitting packages.

4. The display device as claimed in claim 2, characterized in that, The active light-emitting package and the plurality of passive light-emitting packages are disposed on a circuit board to form a lamp board module. The circuit board includes a plurality of circuit traces for coupling the plurality of passive light-emitting packages to the plurality of contacts respectively.

5. The display device as claimed in claim 4, characterized in that, The plurality of passive light-emitting packages and the active light-emitting package are respectively separated by a plurality of predetermined distances, and at least a portion of the plurality of predetermined distances are equal to each other.

6. The display device as claimed in claim 4, characterized in that, The display device also includes multiple interconnected lamp panel modules.

7. The display device as claimed in claim 6, characterized in that, Each of the lamp panel modules is provided with a predetermined number of the plurality of passive light-emitting packages, and the predetermined number of at least a portion of the plurality of lamp panel modules is different.

8. The display device as claimed in claim 7, characterized in that, The multiple passive light-emitting packages are arranged around the active light-emitting package, and the number of the multiple passive light-emitting packages is three, and they are arranged together with the active light-emitting package to form a 2*2 array. Alternatively, the plurality of passive light-emitting packages are arranged around the active light-emitting package, and the number of the plurality of passive light-emitting packages is four, and they are arranged in a cross shape with the active light-emitting package; Alternatively, the plurality of passive light-emitting packages are arranged around the active light-emitting package, and the number of the plurality of passive light-emitting packages is eight, and they are arranged together with the active light-emitting package to form a 3*3 array. Alternatively, the plurality of passive light-emitting packages are arranged around the active light-emitting package, with the number of passive light-emitting packages being fifteen, and arranged in a 4*4 array with the active light-emitting package.

9. The display device as claimed in claim 7, characterized in that, It also includes a display panel, wherein the number of passive light-emitting encapsulations in the lamp panel module located at the edge of the display panel is different from the number of passive light-emitting encapsulations in the lamp panel module not located at the edge of the display panel.

10. The display device as claimed in claim 7, characterized in that, The active light-emitting package includes at least one contact coupled to the plurality of passive light-emitting packages and at least one contact electrically connected to the drive controller.

Images