Microlens array display device bright spot defect repairing system and repairing method thereof

Abstract

The invention provides a system and a method for repairing bright spot defects of a micro-lens array display device, and particularly relates to the technical field of laser repairing of silicon-based Micro-OLED micro-lens array display devices. The system comprises a laser emitting module and an objective lens module which are sequentially arranged from top to bottom, and the laser emitting module is used for emitting laser downwards in a horizontal plane along a first direction in an offset manner; the objective lens module is used for receiving the laser emitted by the laser emitting module and controlling the laser to irradiate and penetrate through the microlens film layer to reach the light-emitting pixel layer, the objective lens module comprises a driving assembly and an objective lens, and the driving assembly can drive the objective lens to deflect by an angle in a vertical plane where the second direction is located so as to control the incident angle of the laser reaching the microlens film layer. Therefore, the first light path and / or the second light path are / is perpendicular to the objective lens and the upper surface of the light-emitting pixel layer at the same time. According to the bright spot defect repairing system for the micro-lens array display device, bright spot repairing can be stably carried out on different areas of a product, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of Micro-OLED laser repair technology, and in particular to a bright spot defect repair system and a repair method for a microlens array display device. Background Art

[0002] At present, for Micro-OLED products, laser is mainly used to destroy the OLED light-emitting layer or anode structure to convert bright spots into dark spots to achieve the repair process. Specifically, for example, in the general processing process, the objective lens is set in a vertical state relative to the product, and the light-emitting layer is destroyed by vertically irradiating the laser to achieve the repair effect. However, for microlens array Micro-OLED (hereinafter referred to as microlens) products, if the traditional OLED bright spot repair method is still used, for the center area of ​​the microlens, the laser offset is small, and the laser can penetrate the microlens and vertically irradiate the light-emitting layer to repair the bright spot; but for the edge position of the lens, if the laser is still used to penetrate the microlens and vertically irradiate the repair, the laser will be refracted when it is vertically incident, resulting in the inability to act on the light-emitting layer. In the actual repair process, only offset processing can be selected, resulting in poor stability of the repair process, low yield, and inability to mass produce. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a system and method for repairing bright spot defects of a microlens array display device, which can stably repair bright spots in different areas of the product.

[0004] According to the first aspect of the present invention, a system for repairing bright spot defects of a microlens array display device comprises a laser emission module and an objective lens module which are sequentially arranged up and down.

[0005] The laser emission module is used to emit laser light in a displaceable manner in space;

[0006] The objective lens module is used to receive the laser emitted by the laser output module and control the laser irradiation to pass through the microlens film layer of the microlens array display device to reach the light-emitting pixel layer;

[0007] Among them, the objective lens module includes a driving component and an objective lens, and the driving component can drive the objective lens to deflect at an angle in a vertical plane where the second direction is located to control the incident angle of the laser reaching the microlens film layer, so as to ensure that the first light path and / or the second light path are simultaneously perpendicular to the objective lens and the upper surface of the light-emitting pixel layer.

[0008] According to some embodiments of the present invention, the repair system further comprises a control module,

[0009] The control module establishes models for different areas of the product according to the size of the microlens unit and the pixel distribution, and establishes a mapping relationship between the defect positions of different areas and the deflection angle of the objective lens and the laser repair process parameters.

[0010] According to some embodiments of the present invention, the laser emission module includes a laser emission device and a galvanometer.

[0011] The galvanometer is used to receive the laser light emitted by the laser emitting device and control the emission angle of the laser light.

[0012] According to some embodiments of the present invention, the driving component is an arc-shaped linear motor, and a driving end of the arc-shaped linear motor is connected to the objective lens.

[0013] According to some embodiments of the present invention, the repair system further comprises an imaging device,

[0014] The imaging device is arranged on one side above the objective lens module, and is used for receiving the light emitted by the light-emitting pixel layer through the objective lens module.

[0015] According to some embodiments of the present invention, the imaging device is a CCD camera.

[0016] According to some embodiments of the present invention, the repair system further includes an optical path guiding device, and the optical path guiding device is disposed between the objective lens module and the imaging device.

[0017] According to some embodiments of the present invention, the optical path guiding device comprises a beam splitter, which is a plane mirror, one side of which transmits light, and the other side of which reflects light.

[0018] The beam splitter is tilted and arranged between the objective lens module and the imaging device, and its upper side is a light-transmitting surface and its lower side is a light-reflecting surface.

[0019] The lower side of the beam splitter faces the imaging device on one side.

[0020] According to some embodiments of the present invention, the tilt angle of the beam splitter is 45°.

[0021] According to some embodiments of the present invention, the repair system further comprises an illumination device, and the illumination device is disposed on one side of the imaging device.

[0022] According to some embodiments of the present invention, the microlens array display device includes, from top to bottom, the microlens film layer, the light-emitting pixel layer, and a substrate stacked in sequence.

[0023] The repair method of the microlens array display device bright spot defect repair system according to the second aspect of the present invention is applied to the microlens array display device bright spot defect repair system of any embodiment of the first aspect, comprising the following steps:

[0024] S1, build models for different areas of the product based on microlens unit size and pixel distribution;

[0025] S2, based on the model, a mapping relationship between defect positions in different regions and objective lens deflection angles and laser repair process parameters is established,

[0026] The calculation formula of the objective lens offset angle θ is:

[0027] θ=K*Z,K=f(L,Sag)

[0028] Wherein, K is the offset coefficient, which is a function of the microlens subunit aperture L and the microlens subunit maximum sag Sag, and Z is the offset of the laser emission module along the first direction;

[0029] S3, based on the mapping relationship, controlling the objective lens to deflect in a vertical plane where the second direction is located, so as to repair the target defect position with the corresponding laser repair process parameters.

[0030] The system for repairing bright spot defects of a microlens array display device according to an embodiment of the present invention has at least the following beneficial effects:

[0031] The bright spot defect repair system of the microlens array display device of the embodiment of the present invention can not only perform stable vertical irradiation repair on the central area of ​​the microlens, but also repair the edge area of ​​the microlens. By adjusting the angle of the objective lens offset, the problem of pixel image distortion caused by refraction problems can be greatly weakened, thereby optimizing the image quality of the imaging, and the light-emitting pixel layer can be accurately repaired by significantly improving the image quality, thereby improving production efficiency.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 A schematic diagram of laser irradiation of a system for repairing bright spot defects of a microlens array display device according to an embodiment of the present invention;

[0035] Figure 2 It is an imaging schematic diagram of a bright spot defect repairing system of a microlens array display device according to an embodiment of the present invention;

[0036] Figure 3 A repair schematic diagram of a bright spot defect repair system for a microlens array display device according to an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of the distribution of light-emitting pixels and micro-lens structures according to an embodiment of the present invention;

[0038] Figure 5 Schematic diagram of the relationship between the aperture of the microlens subunit, the maximum vector height of the microlens subunit and the laser refraction angle according to an embodiment of the present invention.

[0039] Reference numerals:

[0040] Laser emission module 10, galvanometer 11, motor 111, reflective lens 112, objective lens module 20, drive assembly 21, objective lens 22, laser 30, imaging device 40, light path guiding device 50, microlens display 60, microlens film layer 61, luminous pixel layer 62, substrate 63, luminous pixel 70, microlens structure 80. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0042] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0043] First, the system for repairing bright spot defects of a microlens array display device according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] Reference Figure 1 and Figure 2 As shown, the microlens display 60 includes a microlens film layer 61, a light-emitting pixel layer 62 and a substrate 63 stacked in sequence from top to bottom.

[0045] According to the first aspect of the present invention, the microlens array display device bright spot defect repair system may include a laser emission module 10 and an objective lens module 20 which are sequentially arranged up and down. The laser emission module 10 is used to emit a laser 30 in a displaceable manner in space. The objective lens module 20 is used to receive the laser 30 emitted by the laser emission module 10 and control the laser 30 to irradiate through the microlens film layer 61 to reach the luminous pixel layer 62. The objective lens module 20 includes a driving component 21 and an objective lens 22 connected up and down, and the driving component 21 drives the objective lens 22 to deflect the angle in the vertical plane where the second direction is located to control the incident angle of the laser 30 arriving at the microlens film layer 61, so as to ensure that the first optical path and / or the second optical path are perpendicular to the upper surface of the objective lens and the luminous pixel layer at the same time.

[0046] Specifically, in the bright spot defect repair system of the microlens array display device of the embodiment of the present invention, the laser emission module 10 adjusts the position of the laser emission downward along the first direction (for example, the length direction or the width direction of the microlens display 60) above the objective lens module 20 and in the horizontal plane. In addition, the laser emission module 10 can also adjust the angle of the laser emission downward. The objective lens film group 20 receives the laser 30 emitted by the laser emission module 10, wherein the objective lens film group 20 includes a driving component 21 and an objective lens 22, and the objective lens 22 is controlled by the driving component to deflect in a vertical plane where a second direction (wherein the second direction is a vertically downward direction) is located, thereby controlling the incident angle of the laser 30 reaching the microlens display 60 through the objective lens 22, so as to ensure the first optical path (i.e., the optical path of the laser emitted by the laser emission module 10 to reach the light-emitting pixel layer 62, such as Figure 1 ) and / or the second optical path (i.e., the optical path of the light emitted from the light emitting pixel layer 62 to the imaging device, such as Figure 2 As shown in the figure, the optical path is perpendicular to the objective lens 22 and the upper surface of the light-emitting pixel layer 62. The term "perpendicular to the objective lens 22" means that the optical path enters the objective lens 22 at a direction perpendicular to the mirror surface of the objective lens 22 and passes through the center line of the objective lens 22.

[0047] Reference Figure 3 As shown, the general repair method is to perform laser repair on the edge area of ​​the microlens ( Figure 3 The light emitted by the pixel layer 62 is refracted after passing through the microlens film layer 61, causing a large deviation of the light entering the objective lens 22. When the light emitted by the objective lens 22 is captured, the image of the repaired state is distorted. The microlens array display device bright spot defect repair system of the embodiment of the present invention can be used to repair the edge area of ​​the microlens with laser. Figure 3Left side), since the angle between the objective lens 22 and the microlens display 60 product is changed, it can ensure that the light of the luminous pixel layer 62 enters the objective lens 22 from the central area of ​​the objective lens, so that the light emitted by the objective lens 22 can be normally captured. Furthermore, the bright spot defect repair system of the microlens array display device of the embodiment of the present invention can not only perform stable vertical irradiation repair on the central area of ​​the microlens, but also adjust the angle of the objective lens offset for the edge area of ​​the microlens, thereby greatly weakening the pixel image distortion caused by the refraction problem, optimizing the image quality of the imaging, and accurately repairing the luminous pixel layer through the obvious improvement of the image quality, thereby also improving the production efficiency.

[0048] In some embodiments of the present invention, the repair system may further include a control module (not shown), which establishes models for different areas of the product according to the size of the microlens unit and the pixel distribution, and establishes a mapping relationship between the defect positions of different areas and the objective lens deflection angle and the laser repair process parameters.

[0049] Reference Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the laser emission module 10 may include a laser emission device (not shown) and a galvanometer 11 , and the galvanometer 11 is used to receive the laser 30 emitted by the laser emission device and control the emission angle of the laser 30 .

[0050] Specifically, the laser emitting device can be arranged on one side at the same height as the galvanometer 11, and the laser emitting device emits the laser 30 toward the galvanometer 11. The galvanometer 11 is provided with a motor 111 and a reflective lens 112 inside. The motor 111 is used to adjust the angle of the reflective lens 112 and thus adjust the downward emission angle θ of the laser 30. In addition, the laser emitting device and the galvanometer 11 can be connected together on the same mounting frame, and the moving module on the mounting frame can be driven to realize the movement of the laser emitting device and the galvanometer 11 along the length direction or width direction of the microlens display 60 arranged at the bottom, thereby realizing the offset adjustment of the emission position of the laser 30.

[0051] Reference Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the driving component 21 is an arc-shaped linear motor, and the downward driving end of the arc-shaped linear motor is connected to the objective lens 22.

[0052] That is to say, the arc-shaped linear motor is used to drive the objective lens 22 to deflect a predetermined angle in a vertical plane, which is accurate and reliable.

[0053] Reference Figure 1 and Figure 2As shown, in some embodiments of the present invention, the repair system may further include an imaging device 40, which is disposed on the upper side of the objective lens module 20, and is used to receive light emitted by the light-emitting pixel layer 62 through the objective lens module 20.

[0054] That is to say, by arranging the imaging device 40 above the objective lens module 20, the imaging device 40 receives the light emitted by the light-emitting pixel layer 62 through the objective lens 22, performs imaging, and performs precise repair based on the generated image.

[0055] In some embodiments of the present invention, the imaging device 40 may be a CCD camera.

[0056] Reference Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the repair system may further include an optical path guiding device 50 , and the optical path guiding device 50 is disposed between the objective lens module 20 and the imaging device 40 .

[0057] That is to say, the light path guiding device 50 is arranged between the objective lens module 20 and the imaging device 40 so as to accurately guide the light emitted from the objective lens module 20 to the imaging device 40 to improve the imaging quality of the imaging device 40.

[0058] Reference Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the optical path guiding device 50 may include a beam splitter, which is a plane mirror. One side of the beam splitter transmits light, and the other side reflects light. The beam splitter is tilted between the objective lens module 20 and the upper and lower sides of the imaging device 40, and its upper side is a light-transmitting surface, and the lower side is a reflective surface. The lower side of the beam splitter faces the imaging device 40 on one side.

[0059] That is to say, the optical path guiding device 50 can be set as a plane beam splitter with one side transmitting light and the other side reflecting light. Thus, the lower side of the beam splitter is arranged between the objective lens module 20 and the upper and lower parts of the imaging device 40 at an angle toward the imaging device 40. On the one hand, the laser 30 emitted by the laser output module 10 can pass through the beam splitter from the upper side and enter the objective lens 22, and the light emitted by the luminous pixel layer 62 through the objective lens 22 is reflected by the lower side of the beam splitter to the imaging device 40 to realize image formation.

[0060] Preferably, the tilt angle of the beam splitter is 45°.

[0061] In some embodiments of the present invention, the repair system may further include a lighting device, which is disposed on one side of the imaging device 40 .

[0062] The repair method of the microlens array display device bright spot defect repair system according to the second aspect of the present invention is applied to the microlens array display device bright spot defect repair system of any embodiment of the first aspect, and may include the following steps:

[0063] S1, build models for different areas of the product based on the microlens unit size and pixel distribution.

[0064] As an example, Figure 4 As shown in FIG. 8 , it is a schematic diagram of the distribution of the luminous pixels 70 and the microlens structure 80. Since the structure of each product remains basically fixed, different areas of the product are modeled according to the microlens unit size and pixel distribution. In the actual processing process, the entire microlens product is divided into N areas, and one of the areas is selected as Figure 3 As shown, the overlap δ between the arrangement of the luminous pixels and the arrangement of the microlens structure near the central area is relatively high, and the laser beam enters the luminous pixels vertically for processing, and the objective lens basically does not need to be offset or the offset is very small; but near the edge area, the overlap δ between the arrangement of the luminous pixels and the arrangement of the microlens structure is poor, and at this time the laser beam is refracted, causing the processing position to shift.

[0065] The functional relationship between the overlap degree δ between the arrangement of the light-emitting pixels and the arrangement of the microlens structure and the offset angle θ of the objective lens is δ=q(θ). The smaller δ is, the smaller the angle θ that the objective lens needs to be offset is.

[0066] S2, based on the model, establishes the mapping relationship between the defect position in different areas and the objective lens deflection angle and laser repair process parameters.

[0067] The calculation formula of the objective lens offset angle θ is:

[0068] θ=K*Z,K=f(L,Sag)

[0069] Wherein, K is the offset coefficient, which is a function of the microlens subunit aperture L and the microlens subunit maximum sag Sag, and Z is the offset of the laser emission module along the first direction.

[0070] Specifically, Figure 5 As shown, the larger the aperture L of the microlens subunit, the smaller the laser refraction angle α, and the smaller the required laser offset θ; similarly, the larger the maximum sag Sag of the microlens subunit, the larger the laser refraction angle α, and the larger the required laser offset θ. The first direction is the length direction or width direction of the microlens display 60.

[0071] That is to say, after modeling each area separately, the corresponding parameters of the defect positions in different areas are set, including the objective lens offset angle, as well as laser repair process parameters such as laser processing energy and laser spot size, and saved.

[0072] S3, based on the mapping relationship, controlling the objective lens to deflect in a vertical plane where the second direction is located, so as to repair the target defect position with corresponding laser repair process parameters.

[0073] Specifically, during the actual processing, after the CCD system confirms the defect location, it controls the deflection of the objective lens in the vertical plane in the vertical downward direction according to the mapping relationship, and selects the corresponding processing parameters, which can greatly improve the processing efficiency, process stability and overall yield.

[0074] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A system for repairing bright spot defects of a microlens array display device, characterized in that: It includes a laser emission module and an objective lens module which are arranged in sequence up and down. The laser emission module is used to emit laser light in a displaceable manner in space; The objective lens module is used to receive the laser emitted by the laser output module and control the laser irradiation to pass through the microlens film layer of the microlens array display device to reach the light-emitting pixel layer; Among them, the objective lens module includes a driving component and an objective lens, and the driving component can drive the objective lens to deflect at an angle in a vertical plane where the second direction is located to control the incident angle of the laser reaching the microlens film layer, so as to ensure that the first light path and / or the second light path are simultaneously perpendicular to the objective lens and the upper surface of the light-emitting pixel layer.

2. The system for repairing bright spot defects of a microlens array display device according to claim 1, characterized in that: The repair system further includes a control module, The control module establishes models for different areas of the product according to the size of the microlens unit and the pixel distribution, and establishes a mapping relationship between the defect positions of different areas and the deflection angle of the objective lens and the laser repair process parameters.

3. The system for repairing bright spot defects of a microlens array display device according to claim 1, characterized in that: The laser emission module includes a laser emitting device and a galvanometer. The galvanometer is used to receive the laser light emitted by the laser emitting device and control the emission angle of the laser light.

4. The system for repairing bright spot defects of a microlens array display device according to claim 1, characterized in that: The driving component is an arc-shaped linear motor, and the driving end of the arc-shaped linear motor is connected to the objective lens.

5. The system for repairing bright spot defects of a microlens array display device according to claim 1, characterized in that: The repair system also includes an imaging device, The imaging device is arranged on one side above the objective lens module, and is used for receiving the light emitted by the light-emitting pixel layer through the objective lens module.

6. The system for repairing bright spot defects of a microlens array display device according to claim 5, characterized in that: The imaging device is a CCD camera.

7. The system for repairing bright spot defects of a microlens array display device according to claim 5, characterized in that: The repair system also includes an optical path guiding device, which is arranged between the objective lens module and the imaging device.

8. The system for repairing bright spot defects of a microlens array display device according to claim 7, characterized in that: The optical path guiding device comprises a beam splitter, which is a plane mirror, one side of which transmits light and the other side of which reflects light. The beam splitter is tilted and arranged between the objective lens module and the imaging device, and its upper side is a light-transmitting surface and its lower side is a light-reflecting surface. The lower side of the beam splitter faces the imaging device on one side.

9. The system for repairing bright spot defects of a microlens array display device according to claim 8, characterized in that: The tilt angle of the beam splitter is 45°.

10. The system for repairing bright spot defects of a microlens array display device according to claim 5, characterized in that: The repair system further comprises a lighting device, which is arranged at one side of the imaging device.

11. The system for repairing bright spot defects of a microlens array display device according to claim 1, characterized in that: The microlens array display device comprises, from top to bottom, the microlens film layer, the light-emitting pixel layer and a substrate stacked in sequence.

12. A repair method using the microlens array display device bright spot defect repair system according to any one of claims 1 to 11, The following steps are involved: S1, build models for different areas of the product based on microlens unit size and pixel distribution; S2, based on the model, a mapping relationship between defect positions in different regions and objective lens deflection angles and laser repair process parameters is established, The calculation formula of the objective lens offset angle θ is: θ=K*Z,K=f(L,Sag) in, K is the offset coefficient, which is a function of the microlens subunit aperture L and the microlens subunit maximum sag Sag, and Z is the offset of the laser emission module along the first direction; S3, based on the mapping relationship, controlling the objective lens to deflect in a vertical plane where the second direction is located, so as to repair the target defect position with the corresponding laser repair process parameters.

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