TW202343411A - Micro-light-emitting diode display panel - Google Patents

Abstract

A micro-light-emitting diode (microLED) display panel includes a substrate and a driver bonded on the substrate. The driver includes a signal terminal coupled with a signal wire disposed on the substrate; and a repair terminal associated with the signal terminal, the repair terminal coupled with a repair wire disposed on the substrate.

Description

Micro light emitting diode display panel

The present invention relates to a micro-light-emitting diode (microLED) display panel, and in particular to a micro-light-emitting diode display panel that can be easily repaired.

MicroLED (microLED, mLED or μLED) display panel is a type of flat panel display, which is composed of individual microscopic light-emitting diodes with a size range of 1 to 100 microns. Compared with traditional liquid crystal display panels, micro-light-emitting diode display panels have larger contrast ratios, faster response times, and consume less power. Although micro-light-emitting diodes and organic light-emitting diodes (OLED) also have low power consumption characteristics, micro-light-emitting diodes use Group III-V diode technology (such as gallium nitride), so compared with Organic light-emitting diodes have higher brightness, higher luminous efficiency and longer life.

When manufacturing micro-light-emitting diode display panels, abnormalities (such as open circuits or short circuits) sometimes occur when the driver integrated circuit is mounted on the glass substrate. In order to repair this abnormality, re-work is required to remove the original driver integrated circuit from the glass substrate and then reinstall the replacement driver integrated circuit on the glass substrate, which requires considerable time and cost. Additionally, when heavy work is performed, adjacent micro-LEDs are likely to be damaged.

Therefore, there is an urgent need to propose a novel mechanism to overcome the shortcomings encountered in manufacturing micro-light-emitting diode display panels.

In view of the above, one purpose of embodiments of the present invention is to provide a micro-light emitting diode display panel that can be repaired with less time and cost.

According to an embodiment of the present invention, a micro-light emitting diode display panel includes a substrate and a driver provided on the substrate. The driver contains power signal terminals and corresponding repair terminals. The power signal terminal is connected to the power supply through a power signal line provided on the substrate. The repair terminal is connected to the power supply through a repair wire provided on the substrate. The power signal terminals and the corresponding repair terminals are electrically connected to each other in the driver.

According to another embodiment of the present invention, a micro-light emitting diode display panel includes a substrate and a driver provided on the substrate. The driver contains signal terminals and corresponding repair terminals. The signal terminals are coupled to corresponding signal lines provided on the substrate. The repair terminal is coupled to the corresponding repair line provided on the substrate. The repair line partially overlaps the corresponding signal line, but is not initially electrically connected.

The first figure shows a block diagram of a microLED display panel 100 according to an embodiment of the invention. In this embodiment, the micro-light emitting diode display panel 100 may include a plurality of micro-light emitting diodes 11 arranged in a matrix form. The micro-LED display panel 100 may include a driver 12 (eg, an integrated circuit) that uses a passive matrix addressing mechanism to drive the micro-LEDs 11 . Among them, the anodes of the micro-light-emitting diodes 11 in the same row are electrically connected to the driver 12 , and the cathodes of the micro-light-emitting diodes 11 in the same column are electrically connected to the driver 12 . The micro-LED display panel 100 may include a timing controller 13 for controlling the driver 12 .

The second figure shows a top view of the micro-light emitting diode display panel 100 according to the first embodiment of the present invention. Among them, the driver 12 is combined on the substrate 10 (for example, a glass substrate). The driver 12 may include at least one power signal terminal (terminal, pin or pad) 121, such as Vp1 and Vp2 illustrated in the second figure. The power signal terminals and other terminals mentioned later in this specification may include conductive materials (such as indium tin oxide (ITO)). The power signal terminal 121 can be connected to a power source, such as a digital power supply voltage (DVDD), an analog power supply voltage (AVDD) or a ground (GND) through the power signal line 101 (disposed on the substrate 10).

According to one of the features of this embodiment, the driver 12 of this embodiment may include at least one repair terminal 122, such as r_Vp1 and r_Vp2 illustrated in the second figure, corresponding to the power signal terminal 121. The repair terminal 122 can be connected to the power source through the repair wire 102 (disposed on the substrate 10). It is worth noting that the power signal terminal 121 and the repair terminal 122 are electrically connected to each other in the driver 12 .

According to the above embodiment, when the power signal terminal 121 (eg Vp1) detects an abnormality (eg open circuit or short circuit), the connection between the power signal line 101 and the power signal terminal 121 is cut off (eg marked X). The cutting can be performed using laser cutting. Therefore, the repair terminal 122 can be connected to the power supply (shown as a dotted line) through the repair line 102 instead of connecting the abnormal power signal terminal 121 through the power signal line 101 . Thereby, the abnormality can be repaired without rework (that is, removing the original driver 12 from the substrate 10 and reinstalling the replacement driver on the substrate 10). Therefore, time and cost can be greatly reduced when manufacturing the micro-light emitting diode display panel 100 .

The third figure shows a top view of the micro-light emitting diode display panel 100 according to the second embodiment of the present invention. Among them, the driver 12 is combined on the substrate 10 . The driver 12 may include at least one signal terminal 123, such as the data and control input signal terminals T1~T3, the data output signal terminals D1~D3/Dx~Dz and the common output signal terminals C1~C3/Cx~Cz illustrated in the third figure. . The signal terminals 123 can be coupled to corresponding signal lines 103 provided on the substrate 10 .

According to one of the features of this embodiment, the driver 12 of this embodiment may include at least one repair terminal 124 corresponding to the signal terminal 123 . As illustrated in the third figure, the repair terminals r_Ta and r_Tb correspond to the data and control input signal terminals T1~T3, the repair terminals r_Da and r_Db correspond to the data output signal terminals D1~D3/Dx~Dz, and the repair terminals r_Ca and r_Cb correspond to Common output signal terminals C1~C3/Cx~Cz. In this embodiment, the repair terminal 124 can be coupled to the corresponding repair line 104 , which is provided on the substrate 10 . As illustrated in the third figure, the repair terminals r_Ta and r_Tb are respectively coupled to the corresponding repair lines r_Tbusa and r_Tbusb, the repair terminals r_Da and r_Db are respectively coupled to the corresponding repair lines r_Dbusa and r_Dbusb, and the repair terminals r_Ca and r_Cb are respectively coupled to the corresponding repair lines. Lines r_Cbusa and r_Cbusb.

The repair line 104 and the corresponding signal line 103 may partially overlap, but are not initially electrically connected. As illustrated in the third figure, the repair lines r_Tbusa and r_Tbusb and the corresponding signal lines 103 (which correspond to the signal terminals T1 to T3) may partially overlap, but are not initially electrically connected; the repair lines r_Dbusa and r_Dbusb and the corresponding signal lines 103 (which correspond to the signal terminals T1~T3) Corresponding to signal terminals D1~D3/Dx~Dz) may partially overlap, but are not initially electrically connected; repair lines r_Cbusa and r_Cbusb and corresponding signal lines 103 (corresponding to signal terminals C1~C3/Cx~Cz) may partially overlap , but not initially electrically connected.

According to the above embodiment, when the signal terminal 123 (eg T2) detects an abnormality (eg open circuit or short circuit), the connection between the signal terminal 123 and the corresponding signal line 103 is cut off (eg marked X). The cutting can be performed using laser cutting. Next, the overlapping position between the repair line 104 (for example, r_Tbusb) and the signal line 103 (corresponding to the abnormality) is electrically coupled. The electrical coupling may use laser welding. Then, the repair terminal 124 (for example, r_Tb) is selected and the signal terminal 123 (for example, T2) corresponding to the abnormality is discarded. The selection and abandonment of the driver 12 can be set by the timing controller 13, for example, using a multiplexer to select from the signal terminal 123 and the repair terminal 124. Therefore, the signal line 103 (corresponding to the abnormality) may be connected to the repair terminal (eg, t_Tb) rather than to the abnormal signal terminal (eg, T2). Thereby, the abnormality can be repaired without rework (that is, removing the original driver 12 from the substrate 10 and reinstalling the replacement driver on the substrate 10). Therefore, time and cost can be greatly reduced when manufacturing the micro-light emitting diode display panel 100 . In a similar situation, when other signal terminals 123 (such as D1, C3, Cy or Dx illustrated in the third figure) detect abnormalities (such as open circuit or short circuit), the above procedure can be used to repair the abnormality.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the patentable scope of the present invention; all other equivalent changes or modifications made without departing from the spirit of the invention shall be included in the following. Within the scope of patent application.

100:Micro light emitting diode display panel 10:Substrate 101:Power signal line 102: Repair line 103:Signal line 104: Repair line 11:Micro light emitting diodes 12:Drive 121:Power signal terminal 122:Repair terminal 123:Signal terminal 124: Repair terminal 13: Timing controller Vp1, Vp2: power signal terminals r_Vp1, r_Vp2: repair terminal DVDD: digital supply voltage AVDD: analog supply voltage GND: ground T1~T3: Data and control input signal terminals D1~D3,Dx~Dz: data output signal terminals C1~C3,Cx~Cz: common output signal terminals r_Ta,r_Tb: repair terminal r_Da,r_Db: repair terminal r_Ca,r_Cb: Repair terminal r_Tbusa,r_Tbusb: repair line r_Dbusa,r_Dbusb: repair line r_Cbusa,r_Cbusb: repair line

The first figure shows a block diagram of a micro-light emitting diode display panel according to an embodiment of the present invention. The second figure shows a top view of the micro-light emitting diode display panel according to the first embodiment of the present invention. The third figure shows a top view of the micro-light emitting diode display panel according to the second embodiment of the present invention.

100:Micro light emitting diode display panel

10:Substrate

101:Power signal line

102: Repair line

121:Power signal terminal

122:Repair terminal

Vp1, Vp2: power signal terminals

r_Vp1, r_Vp2: Repair terminal

DVDD: digital supply voltage

AVDD: analog supply voltage

GND: ground

Claims (16)

A micro-luminescent diode display panel, including: a substrate; A driver is provided on the substrate, and the driver includes: A signal terminal, coupled to a signal line, is provided on the substrate; and A repair terminal is coupled to a repair line and is provided on the substrate. Such as the micro-light emitting diode display panel of claim 1, wherein when the signal terminal detects an abnormality, the connection between the signal line and the signal terminal is cut off. The micro-light emitting diode display panel of claim 1, wherein when the signal terminal detects an abnormality, the connection between the signal terminal and the signal line is cut off, and then the repair line and the signal line are electrically coupled overlapping positions. The micro-light emitting diode display panel of claim 1, wherein the signal terminal and the repair terminal include conductive material. A micro-luminescent diode display panel, including: a substrate; A driver is provided on the substrate, and the driver includes: A power signal terminal is connected to the power supply through a power signal line, and the power signal line is provided on the substrate; and A repair terminal corresponding to the power signal terminal, the repair terminal is connected to the power supply through a repair line, and the repair line is provided on the substrate; The power signal terminal and the corresponding repair terminal are electrically connected to each other in the driver. Such as the micro-light emitting diode display panel of claim 5, wherein when the power signal terminal detects an abnormality, the connection between the power signal line and the power signal terminal is cut off. The micro-light emitting diode display panel of claim 6, wherein the connection between the power signal line and the power signal terminal is cut off using laser cutting. For example, the micro-light emitting diode display panel of claim 5, wherein the power supply includes a digital power supply voltage, an analog power supply voltage or a ground. Such as the micro-light emitting diode display panel of claim 5, wherein the power signal terminal and the repair terminal include conductive materials. A micro-luminescent diode display panel, including: a substrate; A driver is provided on the substrate, and the driver includes: A signal terminal, coupled to a corresponding signal line, is provided on the substrate; and A repair terminal corresponding to the signal terminal, the repair terminal is coupled to a corresponding repair line, which is provided on the substrate; The repair line partially overlaps the corresponding signal line, but is not initially electrically connected. The micro-light emitting diode display panel of claim 10, wherein when the signal terminal detects an abnormality, the connection between the signal terminal and the signal line is cut off, and then the repair line and the signal line are electrically coupled. overlapping positions. The micro-light emitting diode display panel of claim 11, wherein the connection between the signal terminal and the signal line is cut off using laser cutting. The micro-light emitting diode display panel of claim 11, wherein the electrical coupling at the overlapping position between the repair line and the signal line uses laser welding. The micro-light emitting diode display panel of claim 11, wherein the repair terminal is selected in the driver and the signal terminal corresponding to the abnormality is discarded. The micro-light emitting diode display panel of claim 14, wherein a multiplexer is used to select the repair terminal and discard the signal terminal corresponding to the abnormality. The micro-light emitting diode display panel of claim 10, wherein the signal terminal and the repair terminal include conductive material.

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