CN212217440U

CN212217440U - Device for repairing defects of flexible OLED display device

Info

Publication number: CN212217440U
Application number: CN202020850589.5U
Authority: CN
Inventors: 王馨莹; 王福旺; 孟鹏飞; 刘欣; 张亚辉; 李立锋; 林涛
Original assignee: Beijing C&w Technology Development Co ltd
Current assignee: Beijing C&w Technology Development Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-12-25
Anticipated expiration: 2030-05-20

Abstract

The utility model relates to a device for repairing the defect of a flexible OLED display device, which comprises a display panel aligning mechanism, a moving mechanism, a laser repairing mechanism, an OLED lighting mechanism and a control mechanism; the display panel alignment mechanism is provided with a UVW console for adjusting an alignment angle; the OLED lighting mechanism is provided with a lighting control unit and an air suction pressing needle unit for adsorbing and fixing a workpiece to be repaired, the lighting control unit is electrically connected with the air suction pressing needle unit, and the air suction pressing needle unit is fixed on the UVW console; the movement mechanism is provided with a displacement table movement unit and a gantry movement unit, the laser repair mechanism is arranged on the gantry movement unit, and the UVW control platform is arranged on the displacement table movement unit. The utility model discloses a motion and display panel counterpoint mechanism accurate control area restore the work piece place position and angle, treat the defect location and the restoration precision of restoreing the work piece better, restoration defect that can be complete has improved repair efficiency and restoration quality.

Description

Device for repairing defects of flexible OLED display device

Technical Field

The utility model relates to a display device restores technical field, especially relates to a device for restoreing flexible OLED display device defect.

Background

Organic Light-Emitting Diode (OLED-Emitting Diode) display technologies represented by flexible displays are becoming more and more popular and are becoming new stars of display panels. The method is most remarkable in products such as mobile phones, media players, small-sized entrance-level televisions and the like. Different from a standard liquid crystal display, the OLED display technology has the advantages of no backlight, higher contrast, better image quality, thinner overall thickness, flexibility and the like, and in addition, the cost is continuously reduced, the yield is continuously increased, so that the OLED display technology occupies a half-wall river mountain of the display market. With the size of the display panel becoming larger and higher, the resolution becomes higher and higher, the manufacturing process of the panel becomes more and more complex, and the defects of the panel are almost inevitable in the process of manufacturing tens of millions of micron-sized pixels, and tens of thousands of scanning lines and signal lines on a large-area glass substrate.

The global flat panel display industry is increasingly competitive, and the yield of panel production is directly related to the profit and survival of panel manufacturing enterprises. At present, the net profit of panel manufacturers is usually less than 10%, and each yield improvement of 1% means the profit increase of nearly 10%. Therefore, the yield improvement brought by defect repair directly influences the profit improvement of panel manufacturing enterprises. Especially on the large-sized television panel which is emerging in recent years, the characteristics of high single-chip value, few cutting blocks, low yield base number and the like require higher yield improvement. Accordingly, the panel repair technology is increasingly gaining attention and attention in the flat panel display industry. Currently, the domestic flat panel display industry is in a high-speed development stage, and domestic display panel manufacturers are actively competing with the international flat panel display in japan and korea by means of scale enlargement, technology improvement, product structure optimization, and the like. At present, the whole scale of the semiconductor display industry in China is nearly at the first global level, but the yield of the production line still needs to be further improved.

In the field of display technology, various defects often appear on a display device, and the repair rate of the defects is very important for optimizing the yield and production cost of the device.

In the prior art, the defects of the flexible OLED display device are usually repaired by using laser, so that the aims of repairing and detecting in real time can be fulfilled, but the conventional automatic repairing process is complex, low in efficiency, high in cost and low in success rate of one-time repairing.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned technical problem and provide a simple, efficient device that is used for restoreing flexible OLED display device defect of process to solve above-mentioned at least one technical problem.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a device for repairing defects of a flexible OLED display device comprises a display panel alignment mechanism, a movement mechanism, a laser repair mechanism, an OLED lighting mechanism and a control mechanism, wherein the display panel alignment mechanism, the movement mechanism, the laser repair mechanism and the OLED lighting mechanism are all electrically connected with the control mechanism;

the display panel alignment mechanism is provided with a UVW console for adjusting an alignment angle;

the OLED lighting mechanism is provided with a lighting control unit and an air suction pressure needle unit which is used for adsorbing, fixing and lighting a workpiece to be repaired, the lighting control unit is electrically connected with the air suction pressure needle unit, and the air suction pressure needle unit is fixed on the UVW console;

the laser repairing mechanism is arranged on the gantry movement unit, and the UVW control platform is arranged on the displacement table movement unit.

The utility model has the advantages that: the utility model discloses a motion and display panel counterpoint mechanism accurate control treat the position of placing and the angle of restoreing the work piece, treat the defect location and the restoration precision of restoreing the work piece better, restoration defect that can be complete has improved repair efficiency and restoration quality.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the laser repair mechanism comprises a laser energy measuring unit used for measuring the energy of the laser beam in the light path, and a laser emitting device, a beam forming unit, a beam shaping unit and a laser projection unit which are sequentially arranged along the light path direction, wherein the laser energy measuring unit is arranged along the light path direction, the laser energy measuring unit is provided with a non-polarization beam splitting cube and an energy meter, and the beam forming unit is provided with a beam expanding collimator used for adjusting the radius of the beam and an attenuator used for adjusting the energy of the beam.

The beneficial effect of adopting the further scheme is that: the laser energy measuring unit is arranged to measure laser energy, so that better repairing laser can be obtained, and the repairing effect is good.

Furthermore, an anti-damage unit for processing the reflected laser is arranged between the laser emitting device and the beam forming unit.

The beneficial effect of adopting the further scheme is that: set up the damage prevention unit, can avoid laser to damage laser emission device along the reverberation of optical axis direction, effectual promotion laser emission device's life.

Further, the laser emitting device is a pulse YAG laser, and the repair laser of the pulse YAG laser is nanosecond pulse laser with the wavelength range of 520-540 nm.

The beneficial effect of adopting the further scheme is that: the pulse YAG laser can be continuously repaired, the repairing effect is good, and the repairing effect is good when the nanosecond pulse laser with the wavelength of 520-540 nm is adopted as the repairing laser.

Furthermore, the laser shaping unit comprises a scanning galvanometer, a field lens and a shaping slit, and the field lens and the shaping slit are arranged between the laser projection unit and the shaping field lens in a switchable manner.

The beneficial effect of adopting the further scheme is that: the field-switchable lens and the shaping slit are adopted to realize the shaping of the repair laser, the shaping effect on the repair laser is better, and various repair modes are realized.

Furthermore, the laser projection unit comprises a projection tube lens and an objective lens used for focusing laser on the workpiece to be repaired, and an automatic focusing mechanism and a monitoring mechanism used for detecting the repairing effect are arranged on the objective lens.

The beneficial effect of adopting the further scheme is that: the objective lens is provided with an automatic focusing mechanism which can focus laser and is used for processing and repairing, and the monitoring mechanism is arranged to detect the repairing effect.

Further, the monitoring mechanism comprises an illumination system for providing illumination light and an imaging system for receiving reflected light of the illumination light and imaging.

The beneficial effect of adopting the further scheme is that: through lighting system and imaging system, can carry out synchronous monitoring to the restoration effect, be favorable to promoting prosthetic efficiency.

Further, the illumination system comprises a light source, a polarizer and a Kohler illumination structure, and illumination light emitted by the light source is irradiated on the surface of the repair area of the workpiece to be repaired through the polarizer, the Kohler illumination structure and the objective lens.

The beneficial effect of adopting the further scheme is that: through Kohler illumination structure and polarizer can provide the illuminating effect of easier resolution, be favorable to obtaining clearer formation of image effect.

Further, the imaging system comprises an imaging tube mirror, an analyzer and a CCD, and the CCD receives reflected light which sequentially passes through the imaging tube mirror and the analyzer and forms an image on a target surface.

The beneficial effect of adopting the further scheme is that: can obtain clearer imaging, and is favorable for reducing monitoring errors.

Further, the display panel alignment mechanism comprises an alignment lighting unit for providing alignment illumination and an alignment camera unit for collecting an alignment image.

The beneficial effect of adopting the further scheme is that: the setting is counterpointed lighting unit and is counterpointed camera unit, realization that can be better is counterpointed, can be convenient for better definite repair coordinate, realizes defective pixel's accurate restoration.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the display panel alignment mechanism of the present invention;

FIG. 3 is a schematic view of the movement mechanism of the present invention;

fig. 4 is a schematic structural view of the laser repair mechanism of the present invention;

fig. 5 is a schematic structure of the monitoring mechanism of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. control mechanism, 2, display panel alignment mechanism, 21, alignment illumination unit, 22, alignment camera unit, 23, UVW console, 3, motion mechanism, 31, displacement stage motion unit, 32, gantry motion unit, 4, laser repair mechanism, 41, laser emission device, 42, damage prevention unit, 43, beam forming unit, 431, beam expanding collimator, 432, attenuator, 44, beam shaping unit, 441, scanning galvanometer, 442, field lens, 443, shaping slit, 45, laser projection unit, 451, projection barrel lens, 452, objective lens, 46, auto focusing mechanism, 47, laser energy measurement unit, 471, non-polarization beam splitting cube, 472, energy meter, 5, OLED lighting mechanism, 51, suction pressure needle unit, 52, lighting control unit, 6, monitoring mechanism, 61, illumination system, 611, illumination light source, 612, polarizer, 613, illumination system, illumination light source, Kohler lighting structure, 62, imaging system, 621, imaging tube lens, 622, analyzer, 623, CCD, 7, workpiece to be repaired.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Examples

As shown in fig. 1-3, the core of the present invention is to provide a device for repairing the defects of a flexible OLED display device, which comprises a display panel alignment mechanism 2, a movement mechanism 3, a laser repair mechanism 4, an OLED lighting mechanism 5 and a control mechanism 1, wherein the display panel alignment mechanism 2, the movement mechanism 3, the laser repair mechanism 4 and the OLED lighting mechanism 5 are all electrically connected to the control mechanism 1; the display panel alignment mechanism 2 is provided with a UVW console 23 for adjusting an alignment angle; the OLED lighting mechanism 5 is provided with a lighting control unit 52 and an air suction pressure pin unit 51 for adsorbing and fixing the workpiece 7 to be repaired, the lighting control unit 52 is electrically connected with the air suction pressure pin unit 51, and the air suction pressure pin unit 51 is fixed on the UVW console 23; the movement mechanism 3 is provided with a displacement table movement unit 31 and a gantry movement unit 32, the laser repair mechanism 4 is arranged on the gantry movement unit 32, and the UVW control platform 23 is arranged on the displacement table movement unit 31.

Preferably, the display panel alignment mechanism 2 includes an alignment illumination unit 21 for providing alignment illumination and an alignment camera unit 22 for capturing alignment images, and it should be noted that, the alignment camera unit 21 is electrically connected with the UVW console 23, the alignment illumination unit 21 and the alignment camera unit 22 are fixed outside the moving mechanism 3 and located at the alignment position of the displacement table moving unit 31, because the alignment lighting unit 21 and the alignment camera unit 22 are fixed in position, the UVW console 23 rotates to perform fine adjustment alignment on the workpiece 7 to be repaired only after the translation console moving unit 31 drives the UVW console 23 to reach the preset alignment position, the repair of the workpiece 7 to be repaired can be realized, the alignment lighting unit 21 provides an alignment light source, and the alignment camera unit 22 feeds back an alignment position picture in real time, so that the rapid alignment repair of the workpiece 7 with the repair can be realized, and the repair efficiency is high.

It should be noted that, the displacement table moving unit 31 is provided with a loading position, an alignment position, a repairing position and a blanking position, the displacement table moving unit 31 drives the UVW console 23 to switch between the loading position, the alignment position and the blanking position, the UVW console 23 aligns the workpiece 7 to be repaired to a target angle by accurately adjusting the angle of the workpiece 7 to be repaired to be consistent with the moving axis of the displacement table moving unit 31 according to the real-time alignment information of the illumination unit 21 and the camera unit 22 due to the installation error of the workpiece 7 to be repaired when the loading is fixed, and the position is more accurately positioned; the repairing position is positioned below the gantry moving unit 32, and the laser repairing mechanism 4 is adjusted to the repairing position for repairing.

It should be further noted that the workpiece 7 to be repaired is fixed on the air suction needle pressing unit 51 by air suction, a needle pressing for lighting the workpiece 7 to be repaired is arranged on the air suction needle pressing unit 51, the workpiece 7 to be repaired is adsorbed on the air suction needle pressing unit 51 and connected with the needle pressing before alignment, and the lighting control unit 52 is electrically connected with the needle pressing for lighting the workpiece 7 to be repaired.

Preferably, as shown in fig. 4, the laser repair mechanism 4 includes a laser energy measuring unit 47 for measuring the energy of the laser beam in the optical path, and a laser emitting device 41, a beam forming unit 43, a beam shaping unit 44 and a laser projecting unit 45 which are sequentially arranged along the optical path direction, the laser energy measuring unit 47 is provided with a non-polarization beam splitting cube 471 and an energy meter 472, the beam forming unit 43 is provided with a beam expanding collimator 431 for adjusting the beam radius and an attenuator 432 for adjusting the beam energy, it should be noted that, in the embodiment, the laser energy measuring unit 47 is arranged at the position of the attenuator 432, and the laser beam is split and guided to the energy meter 472 by using the non-polarization beam splitting cube 471 to measure the laser energy.

Preferably, an anti-damage unit 42 for processing the reflected laser light is disposed between the laser emitting device 41 and the beam forming unit 43, and the anti-damage unit 42 is an optical isolator, so that the reflected laser light is prevented from damaging the laser emitting device 41 by changing the polarization direction of the reflected light, and the service life of the laser generating device 41 can be prolonged.

Preferably, the laser emitting device 41 is a pulse YAG laser, and it should be noted that the pulse YAG laser can emit nanosecond or femtosecond pulse laser for display repair of the workpiece 7 to be repaired.

Preferably, the repair laser of the laser emitting device 41 is nanosecond pulse laser having a wavelength range of 520 to 540nm, and in this embodiment, the laser wavelength emitted by the pulse YGA laser is 532 nm.

Preferably, the laser shaping unit 44 includes a scanning galvanometer 441, a field lens 442 and a shaping slit 443, the field lens 442 and the shaping slit 443 are disposed between the laser projection unit 45 and the scanning galvanometer 441 in a switchable manner, it should be noted that a back focal plane of the field lens 442 and a slit plane of the shaping slit 443 are located at the same position, the field lens 442 focuses the parallel light scanned by the scanning galvanometer 441 on the back focal plane to form a scanning path that can be repaired, and it should be noted that the beam shaping unit 44 can directly shape the parallel light beam by using the slit 443 alone, or can use the slit 443 as a mask when the beams are shaped by using the scanning galvanometer 441 and the field lens 442, and filter an acceleration and deceleration region that can be scanned when the mask is used to prevent the region from being too large in energy, which is beneficial to laser repair.

Preferably, the laser projection unit 45 comprises a projection cylindrical lens 451 and an objective lens 452 for focusing laser on the workpiece 7 to be repaired, and the objective lens 452 is provided with an automatic focusing mechanism 46 for automatically adjusting the focal plane of the objective lens 452 and switching the objective lenses 452 with various magnifications and a monitoring mechanism 6 for monitoring the repairing effect; it should be noted that the front focal plane of the projection tube lens 451, the back focal plane of the field lens 442, and the slit plane of the shaping slit 443 are located at the same position of the same plane, and the projection tube lens 451 and the objective lens 452 project the scanning path or the shaped parallel light on the front focal plane onto the workpiece 7 to be repaired at the magnification of the objective lens 452; it should also be noted that objective lens 452 can control the position of objective lens 452 and the focal plane position of objective lens 452 through autofocus system 46 to accurately focus laser light on workpiece 7 to be repaired, and objective lens 452 of different magnifications can be switched to meet different repair or monitoring requirements.

Preferably, as shown in fig. 5, the monitoring mechanism 6 includes an illumination system 61 for providing illumination light and an imaging system 62 for receiving reflected light of the light and imaging.

Preferably, the illumination system 61 includes a light source 611, a polarizer 612 and a kohler illumination structure 613, and the monitoring light emitted by the light source 611 is irradiated on the surface of the repair area of the workpiece 7 to be repaired through the polarizer 612, the kohler illumination structure 613 and the laser focusing unit 452; it should be noted that the kohler illumination structure 613 is a secondary imaging structure, which can obtain uniform and sufficiently bright illumination light, and does not generate dazzling glare, and the imaging and light source images are separated, so that the resolution effect of monitoring the repairing effect is better.

Preferably, the imaging system 62 includes an imaging tube lens 621, an analyzer 622 and a CCD 623, and the CCD 623 receives the reflected light sequentially passing through the imaging tube lens 621 and the analyzer 622 and images on the target surface of the CCD 623, it should be noted that the CCD 623 is an image sensor, and by cooperating with the illumination system 61, the imaging can be more easily distinguished, and the brightness and the size of the field of view can be controlled, and then the imaging can be performed by the CCD 623, so as to obtain a clearer imaging result.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The device for repairing the defects of the flexible OLED display device is characterized by comprising a display panel alignment mechanism (2), a movement mechanism (3), a laser repair mechanism (4), an OLED lighting mechanism (5) and a control mechanism (1), wherein the display panel alignment mechanism (2), the movement mechanism (3), the laser repair mechanism (4) and the OLED lighting mechanism (5) are electrically connected with the control mechanism (1);

the display panel alignment mechanism (2) is provided with a UVW console (23) used for adjusting an alignment angle;

the OLED lighting mechanism (5) is provided with a lighting control unit (52) and an air suction pressure pin unit (51) which is used for adsorbing, fixing and lighting a workpiece (7) to be repaired, the lighting control unit (52) is electrically connected with the air suction pressure pin unit (51), and the air suction pressure pin unit (51) is fixed on the UVW console (23);

the laser repairing mechanism (4) is arranged on the gantry moving unit (32), and the UVW control panel (23) is arranged on the displacement table moving unit (31).

2. An apparatus for repairing defects of a flexible OLED display device according to claim 1, wherein said laser repairing mechanism (4) includes a laser energy measuring unit (47) for measuring the energy of the laser beam in the optical path, and a laser emitting device (41), a beam forming unit (43), a beam shaping unit (44) and a laser projecting unit (45) which are sequentially arranged along the optical path direction, said laser energy measuring unit (47) is provided with a non-polarizing beam splitting cube (471) and an energy meter (472), said beam forming unit (43) is provided with a beam expander collimator (431) for adjusting the radius of the beam and an attenuator (432) for adjusting the energy of the beam.

3. An apparatus for repairing defects of a flexible OLED display device according to claim 2, wherein a damage preventing unit (42) for processing reflected laser light is provided between the laser emitting apparatus (41) and the beam forming unit (43).

4. The apparatus for repairing defects of a flexible OLED display device according to claim 2, wherein said laser emitting device (41) is a pulsed YAG laser, and the repair laser of said pulsed YAG laser is nanosecond pulsed laser with wavelength range 520-540 nm.

5. An apparatus for repairing defects of a flexible OLED display device according to claim 2, wherein the beam shaping unit (44) comprises a scanning galvanometer (441), a field lens (442) and a shaping slit (443), the field lens (442) and the shaping slit (443) being switchably disposed between the laser projection unit (45) and the scanning galvanometer (441).

6. The apparatus for repairing defects of a flexible OLED display device according to claim 5, wherein the laser projection unit (45) comprises a projection barrel mirror (451) and an objective lens (452) for focusing laser light on the workpiece (7) to be repaired, and an automatic focusing mechanism (46) and a monitoring mechanism (6) for detecting the repairing effect are arranged on the objective lens (452).

7. An apparatus for repairing defects of a flexible OLED display device according to claim 6, wherein said monitoring means (6) includes an illumination system (61) for providing illumination light and an imaging system (62) for receiving reflected light of the illumination light and imaging.

8. The apparatus according to claim 7, wherein the illumination system (61) comprises a light source (611), a polarizer (612) and a Kohler illumination structure (613), and the illumination light emitted from the light source (611) is irradiated on the surface of the repair area of the workpiece (7) to be repaired through the polarizer (612), the Kohler illumination structure (613) and the objective lens (452).

9. The apparatus according to claim 7, wherein the imaging system (62) comprises an imaging tube mirror (621), an analyzer (622) and a CCD (623), and the CCD (623) receives the reflected light sequentially passing through the imaging tube mirror (621) and the analyzer (622) and images on the target surface.

10. The apparatus for repairing defects of a flexible OLED display device according to any one of claims 1-9, wherein the display panel alignment mechanism (2) comprises an alignment illumination unit (21) for providing alignment illumination and an alignment camera unit (22) for capturing alignment images.