Device and method for detecting light-emitting diode
View Patent ↗A device and a method for detecting LEDs bonded to a display substrate are provided. The device includes a power supply assembly, a pressure fixture and a detector. The power supply assembly is used for providing electrical signals to the LEDs. The pressure fixture is used for applying a force to the power supply assembly, so that the power supply assembly directly contacts and electrically connects to at least one of the LEDs. The detector is on a side of the pressure fixture away from the power supply assembly and used for detecting whether each of the LEDs emits light according to a normal standard.
1. A device configured for detecting a plurality of light-emitting diodes (LEDs) bonded to a display substrate, the device comprising:
a power supply assembly configured to provide electrical signals to the plurality of LEDs;
a pressure fixture configured to apply a force to the power supply assembly, so that the power supply assembly directly contacts and electrically connects to at least one of the plurality of LEDs; and
a detector on a side of the pressure fixture away from the power supply assembly, the detector being configured for collecting images of the plurality of LEDs in a power-on state and determining whether each of the plurality of LEDs emits light according to the images, thereby detecting whether each of the plurality of LEDs emits light according to a normal standard.
2. The device according to claim 1 , wherein the power supply assembly comprises a transparent conductive film, and the transparent conductive film is configured to directly contact and electrically connectable to the plurality of LEDs.
3. The device according to claim 2 , wherein the transparent conductive film is configured to directly contact and electrically connectable to second electrodes of a plurality of vertical inorganic LEDs.
4. The device according to claim 2 , wherein the power supply assembly further comprises a power source, and the power source is configured to be electrically connected to the transparent conductive film and supply the electrical signals simultaneously to at least two of the plurality of LEDs.
5. The device according to claim 2 , wherein a material of the transparent conductive film comprises indium tin oxide.
6. The device according to claim 1 , wherein the power supply assembly comprises an insulating transparent substrate and a plurality of connection pads fixed on a surface of the transparent substrate, and each of the plurality of connection pads is configured to directly contact and electrically connectable to a corresponding one of the plurality of LEDs.
7. The device according to claim 6 , wherein each of the plurality of connection pads is configured to directly contact and electrically connectable to a second electrode of a vertical inorganic LED.
8. The device according to claim 6 , wherein each of the plurality of connection pads is configured to directly contact and electrically connectable to an electrode of a front-mounted inorganic of LED.
9. The device according to claim 6 , wherein the power supply assembly further comprises a power source, and the power source is configured to be electrically connected to the plurality of connection pads to provide the electrical signals to the plurality of LEDs.
10. The device according to claim 9 , wherein the power source is configured to provide the electrical signals to each of the plurality of LEDs independently, or the power source is configured to provide the electrical signals simultaneously to at least two of the plurality of LEDs.
11. The device according to claim 1 , further comprising a stage, wherein the stage is configured to carry and fix the display substrate.
12. The device according to claim 1 , wherein the pressure fixture comprises at least one pressure head, a size of the at least one pressure head is configured such that the power supply assembly directly contacts and electrically connects to at least one of the plurality of LEDs after the power supply assembly is pressed by the pressure head.
13. The device according to claim 12 , wherein the pressure fixture comprises a plurality of the pressure heads of different sizes such that the power supply assembly directly contacts and electrically connects to different numbers of the plurality of LEDs after the power supply assembly is pressed by the plurality of the pressure heads.
14. The device according to claim 12 , wherein the pressure fixture further comprises a mechanical arm, the at least one pressure head is detachably mounted on the mechanical arm, and the mechanical arm is configured to control a movement of each of the at least one pressure head.
15. A method for detecting a plurality of light-emitting diodes (LEDs) bonded to a display substrate, the method comprising:
arranging a power supply assembly on a side of the plurality of LEDs away from the display substrate;
arranging a pressure fixture on a side of the power supply assembly away from the display substrate;
applying a force to the power supply assembly by the pressure fixture, so that the power supply assembly directly contacts and electrically connects to at least one of the plurality of LEDs;
providing electrical signals to the at least one of the plurality of LEDs; and
collecting images of the plurality of LEDs in a power-on state and determining whether each of the plurality of LEDs emits light according to the images, thereby detecting whether each of the plurality of LEDs emits light according to a normal standard.
16. The method according to claim 15 , wherein arranging the pressure fixture comprises selecting a pressure head having a size such that the power supply assembly can directly contact and electrically connects to at least one of the plurality of LEDs after the power supply assembly is pressed by the pressure head.
17. The method according to claim 15 , wherein providing the electrical signals to the at least one of the plurality of LEDs comprises providing the electrical signals simultaneously to at least two of the plurality of LEDs by the power supply assembly.
18. The method according to claim 15 , wherein each of the plurality of LEDs is a vertical inorganic LED and has a first electrode electrically connected to the display substrate and a second electrode opposite to the first electrode, the power supply assembly directly contacts and electrically connects to the second electrode of the at least one of the plurality of LEDs after the force is applied to the power supply assembly, and
providing the electrical signals to the at least one of the plurality of LEDs comprises providing electrical signals by the display substrate and the power supply assembly to the at least one of the plurality of LEDs.
19. The method according to claim 15 , wherein each of the plurality of LEDs is a front-mounted inorganic LED, the power supply assembly directly contacts and electrically connects to two electrodes of the at least one of the plurality of LEDs after the force is applied to the power supply assembly, and providing the electrical signals to the at least one of the plurality of LEDs comprises providing electrical signals by the power supply assembly to the at least one of the plurality of LEDs.