Cell forming device and alignment method

Patent metadata

Field	Value
Publication number	US-10684512-B2
Application number	US-201615511102-A
Country	US
Kind code	B2
Filing date	May 17, 2016
Priority date	May 22, 2015
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

A cell forming device, including a first platform configured to carry a first substrate, a second platform configured to carry a second substrate, and a pre-alignment mechanism. The first platform includes a first suction surface and a second suction surface arranged opposite to each other and configured to attach the first substrate. The pre-alignment mechanism is configured to adjust a position of the first platform to pre-align the first substrate with the second substrate. The cell forming device further includes a turn-over mechanism configured to turn the first platform over to turn the first substrate over, an alignment mechanism configured to adjust a position of the second platform to align the turned first substrate with the second substrate, and a cell forming mechanism configured to move the first substrate to form a cell with the second substrate.

First claim

What is claimed is:

1. A cell forming device, comprising: a first platform configured to carry a first substrate, a second platform configured to carry a second substrate, a pre-alignment mechanism, a turn-over mechanism, an alignment mechanism and a cell forming mechanism, wherein
the first platform comprises a first suction surface and a second suction surface at opposite sides of the first platform, wherein the first suction surface is configured to suction the first substrate to be oppositely arranged to the second substrate when carried by the second platform to form a cell, and the second suction surface is configured to suction another first substrate to be oppositely arranged with another second substrate when carried by the second platform to form a cell,
the turn-over mechanism is configured to turn the first platform over to turn the first substrate over,
the alignment mechanism is configured to adjust a position of the second platform to align the turned first substrate with the second substrate, and
the cell forming mechanism is configured to move the first substrate to form a cell with the second substrate;
wherein the pre-alignment mechanism is configured to adjust, before the first platform is turned over, a position of the first platform to pre-align the first substrate with the second substrate.

2. The cell forming device according to claim 1 , wherein the pre-alignment mechanism comprises:
a first driving mechanism connected to the first platform and configured to control the first platform to rotate;
a second driving mechanism connected to the first platform and configured to control the first platform to move in a first direction in a horizontal plane;
a third driving mechanism connected to the first platform and configured to control the first platform to move in a second direction in the horizontal plane, the second direction being perpendicular to the first direction; and
a fourth driving mechanism connected to the first platform and configured to control the first platform to move in a vertical direction.

3. The cell forming device according to claim 2 , wherein the first driving mechanism comprises:
a first movable table connected to the first platform;
a first rotatable central shaft connected to the first movable table via a bearing;
a first driving motor; and
a first transmission mechanism configured to be driven by the first driving motor to rotate the first rotatable central shaft.

4. The cell forming device according to claim 2 , wherein the second driving mechanism comprises:
a second movable table connected to the first platform;
a first guide rail arranged in the first direction, the second movable table being movably arranged on the first guide rail;
a second driving motor; and
a second transmission mechanism configured to be driven by the second driving motor to move the second movable table along the first guide rail.

5. The cell forming device according to claim 4 , wherein the third driving mechanism comprises:
a third movable table connected to the first platform;
a second guide rail arranged in the second direction, the third movable table being movably arranged on the second guide rail;
a third driving motor; and
a third transmission mechanism configured to be driven by the third driving motor to move the third movable table along the second guide rail, and
the third movable table and the second movable table are a same movable table, and the second guide rail intersects the first guide rail.

6. The cell forming device according to claim 2 , wherein the fourth driving mechanism comprises:
a fourth movable table connected to the first platform;
a third guide rail arranged in the vertical direction, the fourth movable table being movably arranged on the third guide rail;
a fourth driving motor; and
a fourth transmission mechanism configured to be driven by the fourth driving motor to move the fourth movable table along the third guide rail.

7. The cell forming device according to claim 2 , wherein the alignment mechanism has an identical structure to the pre-alignment mechanism.

8. The cell forming device according to claim 1 , further comprising a buffering and stopping mechanism connected to the turn-over mechanism.

9. The cell forming device according to claim 1 , further comprising a dynamic perception adjustment mechanism and a control circuit,
wherein the dynamic perception adjustment mechanism is secured onto the first platform and comprises a plurality of sub-mechanisms each corresponding to a sub-region of the first substrate,
each of the plurality of sub-mechanisms comprises, from top to bottom, a flatness adjustment layer, a piezoelectric sensing layer and a surface suction layer,
the piezoelectric sensing layer of each of the plurality of sub-mechanisms is configured to: when the first substrate is aligned with the second substrate to form the cell, generate, based on a pressure applied to the sub-region of the first substrate corresponding to the sub-mechanism, a pressure-induced current corresponding to the pressure, and transmit the pressure-induced current to the control circuit;
the control circuit is configured to apply an electric field corresponding to the pressure-induced current to the flatness adjustment layer of the sub-mechanism to enable the flatness adjustment layer to be deformed to match a corresponding sub-region of an upper substrate;
the piezoelectric sensing layer of each of the plurality of sub-mechanisms is configured to generate, based on a suction force applied to the sub-region of the first substrate corresponding to the sub-mechanism, a suction force-induced current corresponding to the suction force, and transmit the suction force-induced current to the control circuit, and
the control circuit is configured to control, based on the suction force-induced current, a descending speed of the first platform and a voltage applied to the surface suction layer of the sub-mechanism to enable the surface suction layer of the sub-mechanism to be deformed based on the voltage.

10. The cell forming device according to claim 9 , wherein the surface suction layer is deformed in an energized state to form a plurality of suction cups for attaching the upper substrate.

11. The cell forming device according to claim 9 , wherein for each of the plurality of sub-mechanisms, the piezoelectric sensing layer comprises a first base substrate, a first sub-electrode arranged on the first base substrate, an intermediate layer arranged on the first sub-electrode, a second sub-electrode arranged on the intermediate layer, and a second base substrate arranged on the second sub-electrode;
the first sub-electrode and the second sub-electrode form a capacitor;
the flatness adjustment layer is configured to: when the first substrate is aligned with the second substrate to form the cell, generate charges after a pressure is applied to the flatness adjustment layer to change a charge of the capacitor and thereby to generate a pressure-induced current corresponding to the pressure; and
in the event that a pressure applied to the surface suction layer changes, the suction force applied to the first substrate and a resistivity of the surface suction layer change, and the suction force-induced current corresponding to the suction force is generated in the capacitor.

12. An alignment method using a cell forming device, wherein
the cell forming device comprises: a first platform configured to carry a first substrate, a second platform configured to carry a second substrate, a pre-alignment mechanism, a turn-over mechanism, an alignment mechanism and a cell forming mechanism,
the first platfor

Assignees

• Boe Technology Group Co Ltd
• Hefei Boe Optoelectronics Tech

Inventors

• Jing Yangkun
• Sun Jian
• Xia Junwei
• Xue Xuling
• Zhai Dongdong
• Li Zhongqing

Classifications

• H01J9/241 Primary

  the vessel being for a flat panel display (H01J9/261 takes precedence; flat discharge lamps H01J9/248) · CPC title

• G02F1/133354

  Arrangements for aligning or assembling substrates · CPC title

• G02F1/133394

  Piezoelectric elements associated with the cells · CPC title

• G02F1/1303 Primary

  Apparatus specially adapted to the manufacture of LCDs · CPC title

• G02F1/1343

  Electrodes {(reflective electrodes G02F1/133553)} · CPC title