WO2022083278A1 - Module d'affichage et procédé de préparation et procédé de commande associés, et dispositif électronique - Google Patents

Module d'affichage et procédé de préparation et procédé de commande associés, et dispositif électronique Download PDF

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Publication number
WO2022083278A1
WO2022083278A1 PCT/CN2021/114624 CN2021114624W WO2022083278A1 WO 2022083278 A1 WO2022083278 A1 WO 2022083278A1 CN 2021114624 W CN2021114624 W CN 2021114624W WO 2022083278 A1 WO2022083278 A1 WO 2022083278A1
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WIPO (PCT)
Prior art keywords
light
emitting unit
transistor
substrate
emitting
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PCT/CN2021/114624
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English (en)
Chinese (zh)
Inventor
张健民
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Oppo广东移动通信有限公司
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Publication of WO2022083278A1 publication Critical patent/WO2022083278A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices

Definitions

  • the present application relates to wearable devices, and in particular, to a display module and its preparation method, control method and electronic device.
  • mobile phones can also be used to surf the Internet, send and receive emails, listen to music, and play games.
  • the designer will set an additional display screen on the back of the mobile phone to remind users of messages.
  • the additional display screen makes electronic devices such as mobile phones too heavy and inconvenient.
  • a display module and a method for manufacturing the same, a method for controlling the same, and an electronic device are provided.
  • the embodiment of the present application also provides a display module, including:
  • a driving unit connected to the first light-emitting unit and the second light-emitting unit respectively, and configured to drive the first light-emitting unit and the second light-emitting unit to emit light in a time-sharing manner;
  • the first light-emitting unit and the second light-emitting unit are arranged on the same side of the substrate in an array-like manner.
  • a preparation method of a display module comprising:
  • first light-emitting unit and the second light-emitting unit are arranged on the same surface of the substrate in a spaced array, and the first light-emitting unit and the second light-emitting unit are driven by the driving unit. Lights up when split.
  • a control method of a display module comprising:
  • the driving unit is controlled to drive the second light-emitting unit to emit light.
  • An electronic device includes the above-mentioned display module.
  • FIG. 1 is a schematic structural diagram of a display module according to an embodiment
  • FIG. 2 is a schematic structural diagram of a first light-emitting unit and a second light-emitting unit arranged in a matrix according to an embodiment
  • FIG. 3 is a schematic structural diagram of a first light-emitting unit and a second light-emitting unit arranged in a matrix according to another embodiment
  • FIG. 4 is a schematic structural diagram of an arrangement of microLED sub-pixels and electronic ink pixels according to the first embodiment
  • FIG. 5 is a schematic structural diagram of an arrangement of microLED sub-pixels and electronic ink pixels according to the second embodiment
  • FIG. 6 is a schematic structural diagram of an arrangement of microLED sub-pixels and electronic ink pixels according to the third embodiment
  • FIG. 7 is a schematic structural diagram of an arrangement of microLED sub-pixels and electronic ink pixels according to the fourth embodiment
  • FIG. 8 is a schematic structural diagram of an arrangement of microLED sub-pixels and electronic ink pixels according to the fifth embodiment
  • FIG. 9 is a schematic structural diagram of an arrangement of microLED sub-pixels and electronic ink pixels according to the sixth embodiment.
  • FIG. 10 is a circuit diagram of a driving unit according to an embodiment
  • FIG. 11 is a flowchart of a method for manufacturing a display module according to an embodiment
  • FIG. 12 is a flow chart of a method for manufacturing a display module according to another embodiment
  • FIG. 13 is a sub-flow diagram of forming a plurality of driving units, a plurality of first light-emitting units and a plurality of second light-emitting units on the substrate according to an embodiment
  • FIG. 14 is a sub-flow diagram of forming a plurality of the second driving circuits and a plurality of the second light emitting units on the substrate in the steps of an embodiment
  • FIG. 15 is a schematic diagram of the device structure after step 211;
  • FIG. 16 is a schematic diagram of the device structure after step 212;
  • FIG. 17 is a schematic diagram of the device structure after step 213;
  • FIG. 18 is a schematic diagram of the device structure after step 214;
  • 19 is a schematic diagram of the device structure after the step of coating phosphor
  • 20 is a sub-flow chart of forming a plurality of the second driving circuits and a plurality of the second light-emitting units on the substrate in the steps of another embodiment
  • FIG. 21 is a flowchart of a control method of a display module according to an embodiment.
  • FIG. 1 is a schematic structural diagram of a display module according to an embodiment.
  • the display module includes a substrate 10 , a plurality of first light-emitting units 20 , a plurality of second light-emitting units 30 and a driving unit 40 . .
  • the display module of this embodiment may be disposed in an electronic device having a display function, such as a display, a tablet computer, a mobile phone, a smart wearable device, and the like.
  • the material of the substrate 10 may be a hard material such as glass and plastic, or a soft material such as polyimide, and an appropriate material of the substrate 10 may be selected according to the type of electronic device.
  • the first light-emitting unit 20 is disposed in the first light-emitting area
  • the second light-emitting unit 30 is disposed in the second light-emitting area.
  • the first light-emitting area and the second light-emitting area jointly cover the display area of the display module.
  • a light-emitting unit 20 is connected to the second light-emitting unit 30 for driving the first light-emitting unit 20 and the second light-emitting unit 30 to emit light in a time-divisional manner.
  • the time-sharing light-emitting means that when the electronic device is in the first state, the first light-emitting unit 20 emits light, and a plurality of first light-emitting units 20 together constitute the display screen of the first display screen; when the electronic device is in the second state , the second light-emitting unit 30 emits light, and a plurality of second light-emitting units 30 together constitute a display image of the second display screen.
  • the first state may be a standby state
  • the second state may be a display state.
  • the first light-emitting unit 20 and the second light-emitting unit 30 are controlled by the driving unit 40 respectively, and different light-emitting units can be selected to emit light according to different operating states of the electronic device, so that the first light-emitting unit 20 and the second light-emitting unit 30 can emit light.
  • the two light-emitting units 30 implement corresponding display functions independently of each other, that is, realize flexible dual-screen display.
  • the first light-emitting unit 20 and the second light-emitting unit 30 may be arranged on the same side of the substrate 10 in an array-like manner.
  • the first light-emitting unit 20 and the second light-emitting unit 30 are arranged in an array at intervals, which means that the first light-emitting unit 20 and the second light-emitting unit 30 form a regular arrangement, such as a matrix arrangement, a regular hexagonal arrangement Form layout, etc.
  • this embodiment does not specifically limit the specific arrangement of the first light-emitting units 20 and the second light-emitting units 30, and only the first light-emitting units 20 and the second light-emitting units 30 are alternately and uniformly arranged.
  • the display module can be made compatible with the thicknesses of the first light-emitting unit 20 and the second light-emitting unit 30, thereby reducing the overall thickness of the display module.
  • the first light-emitting unit 20 is h1 and the thickness of the second light-emitting unit 30 is h2
  • the first light-emitting unit 20 and the second light-emitting unit 30 are arranged on two opposite surfaces of the display module , the first light-emitting unit 20 and the second light-emitting unit 30 need to occupy at least the overall thickness of h1+h2, and based on the setting method of this embodiment, the two light-emitting units are arranged on the same side of the substrate 10 at intervals, Then, the overall thickness of the first light-emitting unit 20 and the second light-emitting unit 30 is equal to the larger one of h1 and h2, and therefore, a display module with a smaller thickness can be provided.
  • installing the display module of this embodiment in an electronic device can reduce the overall thickness of the electronic device to which the display module is applied, or can provide a larger setting space for other hardware structures in the electronic device. .
  • a battery with a larger capacity can be provided, thereby increasing the battery life of the electronic device.
  • a camera with a more responsible optical structure can also be set, thereby improving the shooting quality of the electronic device. That is, the display module of this embodiment has higher application flexibility, so that it can be adapted to more electronic devices of different types and different application scenarios.
  • the structures of the first light-emitting unit 20 and the second light-emitting unit 30 are different. Therefore, the first light-emitting unit 20 and the second light-emitting unit 30 have different display qualities of light-emitting power consumption. Specifically, the light-emitting power consumption of the first light-emitting unit 20 can be made smaller than the light-emitting power consumption of the second light-emitting unit 30, and the display quality of the second light-emitting unit 30 can be made better than the display quality of the first light-emitting unit 20, so that the electronic device In different operating states, better display quality can be achieved with lower overall power consumption.
  • the display module includes: a substrate 10; a plurality of first light-emitting units 20; a plurality of second light-emitting units 30; 30 is connected to drive the first light-emitting unit 20 and the second light-emitting unit 30 to emit light in a time-sharing manner; wherein, the first light-emitting unit 20 and the second light-emitting unit 30 are arranged in an array at an interval. the same side of the substrate 10.
  • the first light-emitting unit 20 and the second light-emitting unit 30 can display correspondingly for different operating states, and by arranging the first light-emitting unit 20 and the second light-emitting unit 30 on the same side of the electronic device , the overall thickness of the display module can be reduced on the premise of realizing dual-screen time-sharing display, thereby providing more design space for the mounted electronic equipment, that is, this embodiment provides a lighter, thinner and more flexible Higher display mods.
  • FIG. 2 is a schematic structural diagram of the first light-emitting unit 20 and the second light-emitting unit 30 arranged in a matrix according to an embodiment.
  • the alternate arrangement in the first direction means that in the first direction, every two A second light-emitting unit 30 is disposed between adjacent first light-emitting units 20 , and a first light-emitting unit 20 is disposed between every two adjacent second light-emitting units 30 .
  • the first light-emitting unit 20 and the second light-emitting unit 30 are both strip-shaped structures, and the strip-shaped structures penetrate the display module along the second direction, and the second direction is perpendicular to the first direction.
  • the display module can have higher uniformity of light emission.
  • FIG. 3 is a schematic structural diagram of the first light-emitting unit 20 and the second light-emitting unit 30 arranged in a matrix according to another embodiment.
  • a plurality of first light-emitting units 20 and 30 are provided in the second direction.
  • the second light-emitting unit 30, and the first light-emitting unit 20 and the second light-emitting unit 30 are arranged alternately in sequence in the second direction. That is, in this embodiment, bright stripes extending along the second direction can be avoided when the second light emitting unit 30 is displayed, thereby further improving the uniformity of light emission of the display module.
  • the first light-emitting unit 20 includes at least one reflective light-emitting pixel
  • the second light-emitting unit 30 includes at least one active light-emitting pixel 300 .
  • reflective light-emitting refers to the way in which the display material in the pixel reflects the light in the environment for display, that is, the reflective light-emitting does not need to consume power when displaying, but only needs to be powered on when switching the display screen to adjust The state or position of the display material in the pixel, thereby displaying a different picture. Therefore, the power consumption of the reflective light-emitting pixel is lower, and it is more suitable for mobile terminals such as mobile phones and smart wearable devices. Moreover, due to the display principle of reflective light-emitting pixels, when the user watches the emissive light-emitting display device, the human eye's feeling is similar to that of reading paper, that is, the stronger the ambient light, the clearer the display effect.
  • Active luminescence refers to the way that the pixel itself emits light for display through electrical or optical excitation, that is, active luminescence is less affected by environmental factors, even in a low-brightness environment, it can have higher luminous brightness, and , compared with reflective light-emitting, the active light-emitting pixel 300 also has better color saturation, thereby displaying a richer picture. Therefore, by combining the reflective light-emitting pixel and the active light-emitting pixel 300, the present embodiment provides a display module with good display quality in normal use, extremely low energy consumption in standby state, and good eye protection effect.
  • the first light-emitting unit 20 includes a plurality of electronic ink pixels 200 .
  • the electronic ink pixel 200 includes a first electrode layer 210 , a dye particle layer 220 and a second electrode layer 230 that are stacked in sequence, and the first electrode layer 210 is closer to the substrate 10 when stacked.
  • the second electrode layer 230 is farther away from the substrate 10 , wherein the second electrode layers 230 of the plurality of electronic ink pixels 200 are electrically connected.
  • the first electrode layers 210 of each electronic ink pixel 200 are isolated from each other, and the second electrode layers 230 are conductive with each other and connected to a predetermined level.
  • the dye particle layer 220 includes light-shielding ink particles and light-reflecting ink particles.
  • the light-shielding ink particles are black ink particles
  • the light-reflecting ink particles are white ink particles.
  • the light-shielding ink particles can be black charged particles
  • the reflective particles can be white charged particles
  • the black charged particles and the white charged particles carry different charges
  • the black charged particles and the white charged particles are respectively encapsulated in a plurality of transparent microcapsules middle.
  • the movement of the black charged particles and the white charged particles can be controlled by an external electric field, and finally form a stable arrangement, so that the electronic ink pixels 200 have different reflection properties.
  • the ink particles on the side close to the second electrode layer 230 are used to reflect ambient light for display. Therefore, by adjusting the difference between the black ink particles and the white ink particles arranged on the side close to the second electrode layer 230 scale, even if the e-ink pixels 200 display different shades of gray.
  • the mutually conductive second electrode layers 230 are used as common electrodes, and the mutually isolated second electrode layers 230 are used as pixel electrodes. Therefore, the movement of particles carrying different charges in the dye particle layer 220 is controlled, thereby controlling the proportion of various ink particles in the corresponding display layer on the side close to the second electrode layer 230 .
  • first electrode layer 210 and the second electrode layer 230 may both be transparent electrodes, such as indium tin oxide (ITO), metal grids, silver nanowires, etc.
  • ITO indium tin oxide
  • the electronic ink pixel 200 can be improved.
  • the display brightness is improved and the aperture ratio is improved, thereby providing a display module with better display quality.
  • ink particles of multiple colors can also be arranged in the dye particle layer 220, and each color ink particle can carry charges of different numbers and different conductivity, so that by controlling the first electrode layer 210 and the first electrode layer 210 and the The voltage applied by the second electrode layer 230 controls the electric field between the two electrodes, thereby controlling the movement of various ink particles in the dye particle layer 220 of each electronic ink pixel 200 to form a corresponding color display layer.
  • a color filter is also formed on the e-ink pixel 200 .
  • the color filter is disposed on the surface of the second electrode layer 230 on the side away from the dye particle layer 220.
  • the electronic ink pixel 200 can realize the display of the three primary colors of red, green and blue, thereby realizing the Color display of e-ink pixel 200.
  • a combination of ink particles of multiple colors and a color shading sheet can also be used to provide an electronic ink pixel 200 with a more flexible display manner.
  • the voltage of the first electrode layer 210 can be controlled so that the light-shielding ink particles are concentrated on the side close to the second electrode layer 230 to form a light-shielding layer, so that the electronic ink pixel 200 displays black; the first electrode layer can also be controlled 210 voltage, so that the reflective ink particles are concentrated on the side close to the second electrode layer 230 to form a reflective layer, so that the electronic ink pixel 200 reflects the ambient light to display white, or display the color corresponding to the electronic ink pixel 200 The color of the filter; the voltage of the first electrode layer 210 can also be controlled, so that the dye particles are concentrated on the side close to the second electrode layer 230 to form a color display layer, so that the electronic ink pixel 200 can display the color of the dye particles. color.
  • the light-shielding ink particles and the light-reflecting ink particles can be mixed and concentrated on the side close to the second electrode layer 230 to adjust the display gray scale of the electronic ink pixel 200 .
  • the plurality of first light emitting units 20 can jointly display a picture with richer colors.
  • the active light-emitting pixel 300 includes: at least one microLED sub-pixel 311 of a first color, at least one microLED sub-pixel 312 of a second color, and at least one microLED sub-pixel 313 of a third color.
  • a light-shielding structure is provided between the adjacent microLED sub-pixels 310 and the electronic ink pixels 200, so as to prevent the light emitted by the microLED sub-pixels 310 from being reflected by the electronic ink pixels 200, thereby avoiding the problem of display color mixing, thereby improving the display module's performance. Display quality.
  • FIG. 4 is a schematic structural diagram of the arrangement of the microLED sub-pixels 310 and the e-ink pixels 200 according to the first embodiment. This embodiment can be based on the arrangement of the first light-emitting unit 20 and the second light-emitting unit 30 in the embodiment of FIG. 2 . It should be noted that, in order to simplify the drawings, only some of the microLED sub-pixels 310 and the electronic ink pixels 200 in the display module are shown in FIG. 4 , and the same simplification is also performed in the embodiments of FIGS. 5 to 9 . In other embodiments will not be repeated here.
  • FIG. 4 in this embodiment, three first light-emitting units 20 and three second light-emitting units 30 are shown, and a plurality of the electronic ink pixels 200 in the first light-emitting units 20 are along the second direction Arranged in order, the plurality of microLED sub-pixels 310 in the second light-emitting unit 30 are arranged in order along the second direction; wherein, the electronic ink pixels 200 and the microLED sub-pixels 310 are arranged alternately in the first direction. . Wherein, the electronic ink pixel 200 and the microLED sub-pixel 310 may be aligned in the first direction.
  • each second light-emitting unit 30 includes three microLED sub-pixels 310 of different colors, such as red microLED sub-pixels 311 , green microLED sub-pixels 312 and blue microLED sub-pixels 313 respectively, and located in the same
  • the colors of the multiple microLED sub-pixels 310 in the column are the same, wherein the multiple sub-pixels located in the same column refer to the multiple sub-pixels arranged along the first direction and aligned with each other.
  • the processing technology is relatively simple, so it is a display module with high processing yield.
  • the number of e-ink pixels 200 in the first light-emitting unit 20 is the same as the number of microLED sub-pixels 310 in the second light-emitting unit 30 , and the centers of the sub-pixels located in the same column are on the same straight line.
  • the size of the electronic ink pixel 200 is the same as the size of the microLED sub-pixel 310 , but in other embodiments, the size of the two may also be different, and the present application does not specifically limit the specific size of each sub-pixel size.
  • FIG. 5 is a schematic structural diagram of the arrangement of the microLED sub-pixels 310 and the e-ink pixels 200 according to the second embodiment.
  • the colors of the microLED sub-pixels 310 are different, and as shown in FIG. 5 , a plurality of microLED sub-pixels 310 of different colors are arranged in sequence in the first direction.
  • the color mixing uniformity and brightness uniformity of the microLEDs in the second light emitting unit 30 can be effectively improved, so as to avoid the appearance of bright color bars extending along the first direction.
  • a plurality of red bright bars extending along the first direction may appear in the arrangement of the embodiment in FIG. 4 , thereby affecting the display quality.
  • FIG. 6 is a schematic structural diagram of the arrangement of the microLED sub-pixels 310 and the e-ink pixels 200 according to the third embodiment.
  • a plurality of microLED sub-pixels 310 are sequentially arranged in the first direction, and a plurality of microLED sub-pixels 310 are arranged in sequence in the first direction.
  • the e-ink pixels 200 are also sequentially arranged in the first direction, but the microLED sub-pixels 310 and the e-ink pixels 200 are not aligned.
  • This embodiment provides a new arrangement, but its display effect is similar to that of the embodiment in FIG. 5 .
  • FIG. 7 is a schematic structural diagram of the arrangement of the microLED sub-pixels 310 and the e-ink pixels 200 according to the fourth embodiment.
  • the size of the e-ink pixels 200 is different from the size of the microLED sub-pixels 310 .
  • the microLED sub-pixel 310 is used in the second state. In the second state, the user has higher requirements on the display quality of the display module, while the electronic ink pixel 200 is used in the first state. In the first state, The plurality of first light-emitting units 20 formed by the electronic ink pixels 200 are usually only used for time reminder or new information reminder, etc., so the requirements for display quality are relatively low.
  • the size of the microLED sub-pixel 310 is relatively small. If the electronic ink pixel 200 with the same size as the microLED sub-pixel 310 is prepared, it will be difficult to prepare. The size of the electronic ink pixel 200 is appropriately increased, thereby reducing the difficulty of preparing the display module. In the embodiment shown in FIG. 7 , the size of one e-ink pixel 200 is comparable to the size of three microLED sub-pixels 310 in the second direction.
  • FIG. 8 is a schematic structural diagram of the arrangement of the microLED sub-pixels 310 and the e-ink pixels 200 according to the fifth embodiment.
  • two first light-emitting units 20 and two second light-emitting units are shown.
  • unit 30 Each second light-emitting unit 30 is arranged with two microLED sub-pixels 310 in the first direction.
  • the number of e-ink pixels 200 can be appropriately reduced to provide more microLED sub-pixels 310 , thereby improving the display quality of the display module in the second state.
  • each second light-emitting unit 30 may also be arranged with more than two microLED sub-pixels 310 in the first direction, and multiple microLED sub-pixels 310 in the same second light-emitting unit 30 are located in the same column.
  • the color of each microLED can be different.
  • FIG. 9 is a schematic structural diagram of the arrangement of the microLED sub-pixels 310 and the e-ink pixels 200 according to the sixth embodiment. This embodiment is based on the arrangement of the first light-emitting unit 20 and the second light-emitting unit 30 in the embodiment of FIG. 3 .
  • each first light-emitting unit 20 includes three microLED sub-pixels 310 of different colors
  • each second light-emitting unit 30 includes three e-ink pixels 200
  • the sub-pixels located in the same column are opposite to each other. together.
  • FIGS. 4 to 9 only show schematic structural diagrams of the arrangement of part of the microLED sub-pixels 310 and the electronic ink pixels 200 , and the above-mentioned embodiments are only used for illustration and are not used to limit the protection of the present application. Scope, in other embodiments, the arrangement of the plurality of microLED sub-pixels 310 is not limited to being sequentially arranged in a single direction, that is, the plurality of microLED sub-pixels 310 may also be arranged in a staggered manner.
  • FIG. 10 is a circuit diagram of a driving unit 40 according to an embodiment.
  • the driving unit 40 includes a first driving circuit 410 and a second driving circuit 420 .
  • the first driving circuit 410 is connected to the first light-emitting unit 20 for driving the first light-emitting unit 20 to emit light.
  • the first driving circuits 410 correspond to the electronic ink pixels 200 one-to-one, that is, the output terminals of the first driving circuits 410 are connected to the first electrode layers 210 of the electronic ink pixels 200 in a one-to-one correspondence, so as to control the corresponding electronic ink pixels 200 reflection performance.
  • the second driving circuit 420 is connected to the second light-emitting unit 30 and used to drive the second light-emitting unit 30 to emit light.
  • the second driving circuit 420 has a one-to-one correspondence with the microLED sub-pixels 310 , that is, the output terminals of the second driving circuit 420 are connected to the anodes 3101 of the microLED sub-pixels 310 in a one-to-one correspondence, so as to control the light emission of the corresponding microLED sub-pixels 310 brightness.
  • the first driving circuit 410 and the second driving circuit 420 drive the corresponding first light-emitting unit 20 or the second light-emitting unit 30 to emit light in a time-sharing manner.
  • the corresponding first light-emitting unit 20 or the second light-emitting unit 30 can be controlled to emit light in time-division.
  • the second driving circuit 420 includes a gate 4211 , a source 4212 , a drain 4213 , a source contact structure 4214 and a drain contact structure 4215 , so as to jointly control the microLED sub-pixel 310 to emit light.
  • the above structure is formed in the buffer layer 11 , the gate insulating layer 12 , the interlayer insulating layer 13 , the planarization layer 14 and the pixel definition layer 15 on the substrate 10 , and further, a polarizer layer may be further formed on the pixel definition layer 15 16 and cover plate 17.
  • the display module further includes a first control signal line, a second control signal line and a data signal line
  • the first driving circuit 410 includes: a first transistor 411, the control end of the first transistor 411 is connected to the first control signal line, the first end of the first transistor 411 is connected to the data signal line, and the second end of the first transistor 411 is connected to the data signal line.
  • the first light-emitting unit 20 is connected, and the first transistor 411 is used to control the on-off of the path between the first light-emitting unit 20 and the data signal line;
  • the second driving circuit 420 includes: a second Transistor 421, the control end of the second transistor 421 is connected to the second control signal line, the first end of the second transistor 421 is connected to the data signal line, and the second end of the second transistor 421 Connected to the second light-emitting unit 30, the second transistor 421 is used to control the on-off of the path between the second light-emitting unit 30 and the data signal line; wherein, the first transistor 411 and all The second transistor 421 is turned on in a time-sharing manner.
  • the above functions can be implemented by setting the output signal of the control signal line and the enabling manner of the transistor.
  • the first transistor 411 and the second transistor 421 can have the same conduction characteristics, and the level states of the signals transmitted by the first control signal line and the second control signal line are opposite.
  • the first control signal line when in the first state, can be controlled to output a signal to enable the first transistor 411, and then the electronic ink pixel 200 in the first light-emitting unit 20 can receive signals from The data signal of the data signal line, and the movement of the charged particles is realized according to the data signal, so as to display the target image; when switching to the second state, the first control signal line can be controlled to output the signal first to enable the first transistor 411, thereby Switch the e-ink pixels 200 to the state of not reflecting ambient light, then turn off the first transistor 411, and control the second control signal line to output a signal to enable the second transistor 421, so that the microLED sub-pixel 310 can display the target image .
  • the first transistor 411 and the second transistor 421 can also have opposite conduction characteristics, and the level states of the signals transmitted by the first control signal line and the second control signal line are the same.
  • the display manner of this example is similar to the display manner of the preceding examples, and will not be repeated here.
  • a first data signal line and a second data signal line may also be provided, the first data signal line is used to transmit signals to the electronic ink pixel 200, and the second data signal line is used to transmit signals to the microLED.
  • the sub-pixel 310 transmits signals, and the first transmission signal line and the second transmission signal line are output in time division. It can be understood that the control logic of this embodiment is simpler, but the number of wirings is large, so it is not suitable for small-sized electronic devices. equipment.
  • the 6T1C compensation circuit used in the embodiment of the present application controls the microLED sub-pixel 310 .
  • the second driving circuit 420 further includes: a third transistor T3, a third transistor T4, a third transistor T5, a third transistor T6, a third transistor T7, a third transistor T8, and a storage capacitor C.
  • the gate of the sixth transistor T6 is electrically connected to the second control signal line, the drain of the sixth transistor T6 is electrically connected to the lower plate of the storage capacitor C and the drain of the third transistor T3, The source of the sixth transistor T6 is electrically connected to the gate of the third transistor T5; the gate of the fifth transistor T5 is electrically connected to the scan signal line, and the source of the fifth transistor T5 is electrically connected on the reference voltage line; the gate of the fourth transistor T4 is electrically connected to the scan signal line, the source of the fourth transistor T4 is electrically connected to the reference voltage line, and the drain of the fourth transistor T4 is electrically connected at the gate of the third transistor; the gate of the seventh transistor T7 is electrically connected to the light-emitting control signal, and the power supply voltage VDD is electrically connected to the upper plate of the storage capacitor C and the source of the seventh transistor T7; The drain of the third transistor T3 is electrically connected to the source of the eighth transistor T8, the gate of the eighth transistor T8 is electrically connected to the light-
  • the second driving circuit 420 is configured with a plurality of working stages.
  • the first stage is the data writing and storage threshold voltage (Vth) stage, wherein the light emission control signal is longer than the signal of the scanning signal line.
  • the light-emitting control signal is at a high level
  • the third transistor T7 and the third transistor T8 are turned off, the scan signal line signal is at a low level, the third transistor T4, the third transistor T5, and the third transistor T6 are turned on, and the third transistor T6 is turned on
  • the third transistor T3 is short-circuited into a diode structure
  • the reference voltage line generates a voltage drop
  • the reference voltage line is used to compensate the threshold voltage variation of the transistor
  • the microLED sub-pixel 310 emits light, wherein the light-emitting control signal is longer than the signal of the scanning signal line.
  • the lighting control signal is low level
  • the third transistor T7 and the third transistor T8 are turned on
  • the scan signal line signal is high level
  • the third transistor T4, the third transistor T5, and the third transistor T6 are turned off
  • the third transistor T6 is turned off
  • the microLED sub-pixel 310 emits light.
  • the gate voltage Vg of the third transistor T3 is the potential stored by the storage capacitor C in the first stage
  • the source electrode 4212 of the third transistor T3 The voltage is the power supply voltage VDD. It can be understood that the current passing through the microLED sub-pixel 310 has nothing to do with the threshold voltage Vth of the third transistor T3, thereby compensating for the electrical drift of the third transistor T3.
  • this embodiment provides a second driving circuit 420 of the microLED sub-pixel 310, which adopts a 6T1C circuit to compensate the threshold voltage of the driving transistor in each pixel, and realizes the capture of the threshold voltage through the reference voltage line. This facilitates subsequent panel testing and defect analysis.
  • FIG. 11 is a flowchart of a manufacturing method of a display module according to an embodiment. Referring to FIG. 11 , in this embodiment, the manufacturing method includes steps 100 to 200 .
  • Step 100 providing the substrate 10
  • step 200 a plurality of driving units 40, a plurality of first light-emitting units 20 and a plurality of second light-emitting units 30 are formed on the substrate 10, and the first light-emitting units 20 and the second light-emitting units 30 are both connected to the the drive unit 40 is connected;
  • the first light-emitting unit 20 and the second light-emitting unit 30 are arranged on the same side of the substrate 10 in a spaced array, and the first light-emitting unit 20 and the second light-emitting unit 30 are located there Under the driving of the driving unit 40, the light is time-divisionally emitted.
  • a thinner, lighter and more flexible display module can be formed through the above steps. It can be understood that, for the display module formed by the preparation method of this embodiment, reference may be made to the above-mentioned embodiments of the display module, which will not be repeated here.
  • FIG. 12 is a flowchart of a manufacturing method of a display module according to another embodiment.
  • a plurality of driving units 40 , a plurality of first light emitting units 20 and a plurality of first light emitting units 20 are formed on the substrate 10 in this embodiment.
  • the plurality of second light-emitting units 30 it further includes:
  • Step 300 forming a first control signal line and a second control signal line on the substrate 10;
  • the driving unit 40 includes a first driving circuit 410 and a second driving circuit 420.
  • FIG. 13 shows the steps of an embodiment of forming a plurality of driving units 40, a plurality of first light-emitting units 20 and a plurality of second light-emitting units on the substrate 10.
  • a sub-flow diagram of unit 30 referring to FIG. 13 , the method includes steps 210 to 220 .
  • Step 210 forming a plurality of the second driving circuits 420 and a plurality of the second light-emitting units 30 on the substrate 10, and the second driving circuits 420 are connected to the second control signal lines;
  • Step 220 forming a plurality of the first driving circuits 410 and a plurality of the first light emitting units 20 on the substrate 10 , and the first driving circuits 410 are connected to the first control signal lines.
  • the second light-emitting unit 30 includes a plurality of microLED sub-pixels 310
  • FIG. 14 shows the steps of an embodiment of forming a plurality of the second driving circuits 420 and a plurality of the second driving circuits 420 on the substrate 10.
  • a sub-flow chart of the second light-emitting unit 30 referring to FIG. 14 , the method includes steps 211 to 215 .
  • Step 211 providing an epitaxial substrate 50 and a native substrate 60 , the epitaxial layer 500 is formed on the epitaxial substrate 50 , and the plurality of second driving circuits 420 are formed on the native substrate 60 .
  • FIG. 15 is a schematic diagram of the device structure after step 211 .
  • Step 212 bonding the epitaxial substrate 50 and the native substrate 60 .
  • FIG. 16 is a schematic diagram of the device structure after step 212 .
  • step 213 the epitaxial substrate 50 is peeled off, and the epitaxial layer 500 bonded with the original substrate 60 is retained.
  • FIG. 17 is a schematic diagram of the device structure after step 213 .
  • Step 214 Divide the epitaxial layer 500 to form a plurality of microLEDs on the native substrate 60, the microLEDs are in one-to-one correspondence with the second driving circuits 420, and the anodes 3101 of the microLEDs are connected to the second driving circuits 420.
  • the drive circuit 420 is connected.
  • FIG. 18 is a schematic diagram of the device structure after step 214 .
  • the epitaxial layer 500 is the blue microLED epitaxial layer 500, so the microLED formed after step 214 is a blue microLED, and the red microLED and the green microLED can be formed by coating the red conversion material and the green conversion material on the surface of the blue microLED. , thereby forming microLED sub-pixels 310 of three colors.
  • FIG. 19 is a schematic diagram of the device structure after the step of coating phosphors.
  • Step 215 transfer the second driving circuit 420 and the microLED to the substrate 10 , and connect the control terminal of the second driving circuit 420 to the second control signal line, and the second driving circuit 420
  • the first end is connected to the second data signal line to form a plurality of microLED sub-pixels 310 on the substrate 10 .
  • FIG. 20 is a sub-flow chart of forming a plurality of the second driving circuits 420 and a plurality of the second light emitting units 30 on the substrate 10 in the steps of another embodiment.
  • the second The light-emitting unit 30 includes a plurality of microLED sub-pixels 310 , and forming a plurality of the second driving circuits 420 and a plurality of the second light-emitting units 30 on the substrate 10 includes steps 216 to 218 .
  • Step 216 transferring a plurality of the microLEDs of a first color to the substrate 10 , transferring a plurality of the microLEDs of a second color to the substrate 10 , transferring a plurality of the microLEDs of a third color to the substrate 10 on the substrate 10;
  • Step 217 transferring a plurality of second transistors 421 to the substrate 10;
  • Step 218 Solder the second transistor 421 so that the control end of the second transistor 421 is connected to the second control signal line, the first end of the second transistor 421 is connected to the data signal line, and the second transistor 421 is connected to the data signal line.
  • the second ends of the transistors 421 are connected to the microLEDs in a one-to-one correspondence.
  • step 216 the transfer order of microLEDs of different colors can be exchanged, and the order of step 216 and step 217 can also be exchanged.
  • FIG. 21 is a flowchart of a control method of a display module according to an embodiment.
  • the control method includes steps 2102 to 2104 .
  • Step 2102 when the display module is in the first state, control the driving unit 40 to drive the first light-emitting unit 20 to emit light;
  • Step 2104 when the display module is in the second state, control the driving unit 40 to drive the second light-emitting unit 30 to emit light.
  • steps in the flowcharts are displayed in sequence according to the arrows, these steps are not necessarily executed in the sequence indicated by the arrows. Unless explicitly stated herein, there is no strict order in the execution of these steps, and these steps may be performed in other orders. Moreover, at least a part of the steps in each flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed and completed at the same time, but may be executed at different times. The order of execution is also not necessarily sequential, but may be performed alternately or alternately with other steps or sub-steps of other steps or at least a portion of a phase.
  • the embodiment of the present application also provides an electronic device, including the above-mentioned display module.
  • the electronic device provided by the embodiment of the present application has a thinner thickness and better flexibility.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention concerne un module d'affichage, comprenant : un substrat (10) ; une pluralité de premières unités électroluminescentes (20) ; une pluralité de secondes unités électroluminescentes (30) ; et des unités d'attaque (40) qui sont respectivement connectées aux premières unités électroluminescentes (20) et aux secondes unités électroluminescentes (30), et qui sont utilisées pour exciter les premières unités électroluminescentes (20) et les secondes unités électroluminescentes (30) pour qu'elles émettent de la lumière par répartition dans le temps, les premières unités électroluminescentes (20) et les secondes unités électroluminescentes (30) étant espacées les unes des autres et étant agencées en un réseau sur le même côté du substrat (10).
PCT/CN2021/114624 2020-10-22 2021-08-26 Module d'affichage et procédé de préparation et procédé de commande associés, et dispositif électronique WO2022083278A1 (fr)

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