A high-speed electrical detection system applied to a printed display panel

Abstract

The application discloses a high-speed electric detection system applied to a printed display panel, and relates to the technical field of printed display panels. The high-speed electric detection system comprises a first substrate comprising a conductive layer, a detection probe array arranged opposite to the conductive layer, an anode end of a light-emitting pixel of the printed display panel, a light-emitting layer and a cathode end, which are in a sandwich layer structure; the detection probe array comprises at least one detection probe; the detection probe array and the conductive layer are electrically connected with a high-frequency alternating current power supply module respectively; the high-frequency alternating current power supply module is used for supplying power to the detection probe array and the conductive layer so that a first alternating electric field is formed between the detection probe array and the conductive layer, and the first alternating electric field is used for making the printed display panel electroluminescence; an electric signal measurement module is arranged beside the conductive layer, and an optical signal measurement module is arranged on one side of the first substrate; and the high-speed electric detection system further comprises an electric control displacement module. The application can avoid damaging the printed display panel during detection and improve the detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of printed display panel testing technology, and in particular to a high-speed electrical testing system for printed display panels. Background Technology

[0002] Quantum dot light-emitting diode (QLED) and organic light-emitting diode (OLED) technologies have emerged as research hotspots in flat panel displays in recent years. Their application value in displays has garnered widespread attention from researchers in related fields, and major display manufacturers have released numerous high-end electronic products based on these technologies, such as monitors and smartphones. However, when QLED and OLED are used as array displays, screen components, or even semiconductor lighting, the human eye's sensitivity to color wavelengths and brightness means that unsorted QLED and OLED pixels will exhibit unevenness, affecting visual experience. Both wavelength and brightness inhomogeneity can cause discomfort for users. This is undesirable for display device manufacturers and unacceptable to consumers. Therefore, QLED and OLED pixels must be tested before being used in display devices. Current testing methods primarily involve probe testing, or contact testing. However, probe testing requires a probe to contact the electrodes of the QLED and OLED, which may damage the electrodes. As the size of individual chips used in display devices decreases, the number of QLED and OLED pixels required for a single display increases, and the efficiency of probe testing cannot meet the requirements for high-volume QLED and OLED pixel testing. Furthermore, if defective pixels are found during the inspection process after QLED and OLED panels are manufactured, they can only be removed using laser peeling. Repair can only proceed after all defective pixels have been removed. This traditional inspection method significantly increases the time and material costs incurred during the inspection process. Summary of the Invention

[0003] In view of the aforementioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a high-speed electrical inspection system for printed display panels, which aims to improve inspection efficiency while avoiding damage to the printed display panels during inspection.

[0004] To achieve the above objectives, the present invention discloses a high-speed electrical detection system for printed display panels. The high-speed electrical detection system includes: a first substrate containing a conductive layer and a detection probe array disposed opposite to the conductive layer; wherein, during the detection of the printed display panel, the printed display panel is disposed between the first substrate and the detection probe array; the anode, the light-emitting layer, and the cathode of the light-emitting pixels of the printed display panel have a sandwich layered structure.

[0005] The detection probe array includes at least one detection probe, and the detection probe array and the conductive layer are electrically connected to the high-frequency AC power supply module. The high-frequency AC power supply module is used to supply power to the detection probe array and the conductive layer to form a first alternating electric field between the detection probe array and the conductive layer. The first alternating electric field is used to make the printed display panel electroluminescent. The printed display panel electroluminescent occurs when the first direction in which the anode of the light-emitting pixel points to the cathode is the same as the direction of the electric field of the first alternating electric field.

[0006] An electrical signal measurement module for acquiring electrical signal information corresponding to the printed display panel is disposed next to the conductive layer, and an optical signal measurement module for acquiring light emission information corresponding to the printed display panel is disposed on one side of the first substrate; the high-speed electrical detection system further includes an electrically controlled displacement module, which is used to carry and transport the first substrate or the detection probe array so that the detection probe array matches the position of the printed display panel during the detection process.

[0007] The high-speed electrical detection system is configured to: in response to the anode of each of the light-emitting pixels in the printed display panel being located above the cathode, control the optical signal measurement module to collect the light-emitting information during the half-cycle corresponding to the downward direction of the electric field of the first alternating electric field; otherwise, control the optical signal measurement module to collect the light-emitting information during the half-cycle corresponding to the upward direction of the electric field of the first alternating electric field.

[0008] Optionally, the light-emitting pixels of the printed display panel include a deposited functional layer and a light-emitting layer, and the high-speed electrical detection system detects the printed display panel without depositing metal electrodes.

[0009] Optionally, the light-emitting pixels of the printed display panel include a deposited functional layer and the light-emitting layer, the deposited functional layer includes an anode, and the high-speed electrical detection system detects the printed display panel without the need for a cathode.

[0010] Optionally, the light-emitting pixels of the printed display panel include a deposited functional layer and the light-emitting layer, the deposited functional layer includes a cathode, and the high-speed electrical detection system detects the printed display panel without the need for an anode.

[0011] Optionally, the distance between the detection probe array and the printed display panel during the detection process is maintained between 0.5mm and 2mm, and the power supply voltage of the high-frequency AC power supply module is 4000V.

[0012] Optionally, the detection probe array includes multiple detection probes arranged in an array, each detection probe is equipped with a corresponding detection switch, and one detection probe corresponds to one light-emitting pixel; during the detection process, the detection probe array controls the detection switch so that adjacent detection probes turn on detection at different time periods.

[0013] Optionally, the electrically controlled displacement module is specifically used to: after the detection of the corresponding detection area of ​​the printed display panel is completed, transport the first substrate or the detection probe array so that the next detection area corresponds to the first substrate or the detection probe array.

[0014] Optionally, the bottom area of ​​the detection probe is not less than the area of ​​a single light-emitting pixel of the first substrate to be detected, and the detection probe array detects at least one light-emitting pixel each time.

[0015] Optionally, the high-speed electrical detection system operates in an anhydrous and oxygen-free environment.

[0016] Optionally, the detection probe consists of a planar conductive substrate and its supporting structure, wherein the area of ​​the planar conductive substrate is not less than the area of ​​a single light-emitting pixel of the first substrate to be detected.

[0017] The beneficial effects of this invention are as follows: 1. The system of this invention includes a first substrate containing a conductive layer and a detection probe array disposed opposite to the conductive layer; the detection probe array includes at least one detection probe, and the detection probe array and the conductive layer are electrically connected to a high-frequency AC power supply module; the high-frequency AC power supply module is used to supply power to the detection probe array and the conductive layer to form a first alternating electric field between the detection probe array and the conductive layer, and the first alternating electric field is used to cause the printed display panel to emit light. This invention guides the directional transport of charge carriers in the light-emitting pixels through an electric field, thereby detecting whether the light-emitting pixels are qualified through electroluminescence, thus achieving non-contact detection and avoiding color damage caused by contact detection. Furthermore, compared with the existing probe detection technology, this invention can detect multiple light-emitting pixels with one detection probe, greatly improving detection efficiency. This invention has higher detection accuracy compared to optical microscopy imaging detection and electroluminescence detection. 2. The high-speed electrical detection system of the present invention is configured to: respond to the anode of each light-emitting pixel in the printed display panel being located above the cathode, control the optical signal measurement module to collect light-emitting information during the half-cycle corresponding to the downward direction of the electric field of the first alternating electric field; otherwise, control the optical signal measurement module to collect light-emitting information during the half-cycle corresponding to the upward direction of the electric field of the first alternating electric field. By controlling the optical signal measurement module to collect data when the light-emitting pixel is emitting light and not to collect data when it is not emitting light, the present invention can effectively reduce energy waste from continuously maintaining the collection state. Simultaneously, collecting light signals at the correct light-emitting time of the light-emitting pixel can troubleshoot erroneous light-emitting pixels (a light-emitting pixel emitting light at another time is a fault, but it is still mistakenly detected as qualified because it emits light; this situation can be effectively avoided). 3. The light-emitting pixels of the printed display panel of the present invention include a deposited functional layer and a light-emitting layer. The high-speed electrical detection system detects the printed display panel without depositing metal electrodes. Detecting the printed display panel when metal electrodes need to be deposited can promptly detect faulty light-emitting pixels, which can effectively reduce process and resource waste compared to discovering and troubleshooting errors after the light-emitting pixels are fully manufactured. 4. The detection probe array of the present invention includes multiple detection probes arranged in an array. Each detection probe is equipped with a corresponding detection switch, and each detection probe corresponds to one light-emitting pixel. During the detection process, the detection probe array controls the detection switch to enable adjacent detection probes to activate detection at different time periods. This invention enables adjacent light-emitting pixels to emit light at different time periods, effectively avoiding mutual interference caused by adjacent light-emitting pixels emitting light simultaneously. This makes the optical signal measurement module more accurate and effectively improves the detection accuracy of light-emitting pixel faults.

[0018] In summary, this invention can effectively improve detection efficiency and accuracy while avoiding damage to the printed display panel during detection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a high-speed electrical detection system for printed display panels provided in a specific embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a detection probe array provided in a specific embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of a single detection probe provided in a specific embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a detection probe provided in a specific embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the system structure of the optical signal measurement module provided in a specific embodiment of the present invention when it is located below the first substrate;

[0024] Figure 6 This is a schematic diagram of the detection probe structure within the detection probe of the optical signal measurement module provided in a specific embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the system structure of the optical signal measurement module within the detection probe according to a specific embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of a detection probe provided in a specific embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of a detection probe array provided in a specific embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the structure of an OLED provided in a specific embodiment of the present invention;

[0029] Figure 11 This is a three-dimensional structural diagram of a high-speed electrical detection system for printed display panels provided in a specific embodiment of the present invention. Detailed Implementation

[0030] This invention discloses a high-speed electrical testing system for printed display panels. Those skilled in the art can refer to this document and appropriately modify the technical details to implement it. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in this invention. The methods and applications of this invention have been described through preferred embodiments. Those skilled in the art can obviously make modifications or appropriate alterations and combinations to the methods and applications described herein without departing from the content, spirit, and scope of this invention to implement and apply the technology of this invention.

[0031] The applicant's research revealed that current stylus probing methods for printed display panel inspection require the probe to contact the electrodes of QLED and OLED displays, which may cause some damage to the electrodes. As the size of individual chips used in display devices decreases, the number of QLED and OLED pixels required on a single display also increases, making stylus probing inefficient for high-volume QLED and OLED pixel inspection. While contactless inspection can solve some problems, the continuous acquisition of light signals may reduce inspection accuracy.

[0032] Therefore, embodiments of the present invention provide a high-speed electrical detection system for a printed display panel 1000, such as... Figures 1 to 11 As shown, the high-speed electrical detection system includes: a first substrate 200 containing a conductive layer 300, and a detection probe array 400 disposed opposite to the conductive layer 300; wherein, when the printed display panel 1000 is detected, the printed display panel 1000 is disposed between the first substrate 200 and the detection probe array 400; the anode, light-emitting layer and cathode of the light-emitting pixels of the printed display panel 1000 have a sandwich layered structure;

[0033] The detection probe array 400 includes at least one detection probe 900. The detection probe array 400 and the conductive layer 300 are electrically connected to the high-frequency AC power supply module 800. The high-frequency AC power supply module 800 supplies power to the detection probe array 400 and the conductive layer 300 to form a first alternating electric field between the detection probe array 400 and the conductive layer 300. The first alternating electric field is used to make the printed display panel 1000 electroluminescent. When the first direction from the anode to the cathode of the light-emitting pixel is the same as the direction of the electric field of the first alternating electric field, the printed display panel 1000 electroluminescent.

[0034] An electrical signal measurement module 700 for acquiring electrical signal information corresponding to the printed display panel 1000 is disposed next to the conductive layer 300, and an optical signal measurement module 600 for acquiring light emission information corresponding to the printed display panel 1000 is disposed on one side of the first substrate 200; the high-speed electrical detection system also includes an electrically controlled displacement module 500, which is used to mount and transport the first substrate 200 or the detection probe array 400 so that the detection probe array 400 matches the position of the printed display panel 1000 during the detection process.

[0035] The high-speed electrical detection system is configured to: in response to the anode of each light-emitting pixel in the printed display panel 1000 being located above the cathode, control the optical signal measurement module 600 to collect light-emitting information during the half-cycle corresponding to the downward direction of the electric field of the first alternating electric field; otherwise, control the optical signal measurement module 600 to collect light-emitting information during the half-cycle corresponding to the upward direction of the electric field of the first alternating electric field.

[0036] It should be noted that the side of the light-emitting layer used for evaporating the anode is called the anode side. The anode side includes both the state where the anode and the functional layer on this side are fully prepared and the state where the anode and the functional layer on this side are not fully prepared. The anode side refers only to the direction and does not mean that the anode has been fully prepared. The side of the light-emitting layer used for evaporating the cathode is called the cathode side. The cathode side includes both the state where the cathode and the functional layer on this side are fully prepared and the state where the cathode and the functional layer on this side are not fully prepared. The cathode side refers only to the direction and does not mean that the cathode has been fully prepared.

[0037] A sandwich-like layered structure refers to a multi-layered structure composed of multiple organic and inorganic materials, much like a sandwich. For example, an OLED typically includes the following layers, as shown in the diagram. Figure 10 As shown:

[0038] Anode: This is the top electrode of the OLED, and it is usually made of a transparent material, such as glass or polymer.

[0039] Hole injection layer: This is a thin layer between the anode and the electron transport layer, responsible for injecting holes into the electron transport layer.

[0040] Emitting layer: This is the core part of an OLED, which contains different light-emitting materials used to produce different colors of light.

[0041] Electron transport layer: This is the intermediate layer for transporting electrons, responsible for transferring electrons to the light-emitting layer.

[0042] Electron injection layer: This is a thin layer between the light-emitting layer and the cathode, responsible for injecting electrons into the light-emitting layer.

[0043] Cathode: This is the bottom electrode of an OLED, and it is usually made of a metallic material.

[0044] These layers work together to enable OLEDs to emit light. When a voltage is applied between the anode and cathode, holes and electrons are injected into the light-emitting layer, where they combine to form excitons, which release energy and emit light.

[0045] This invention generates a first alternating electric field to drive the directional transport of charge carriers in the light-emitting pixels of the printed display panel 1000, thereby causing electroluminescence. Then, it collects and judges the electrical and optical signal information of the printed display panel 1000, determining whether each light-emitting pixel is qualified. This non-contact detection avoids damage to the printed display panel 1000 and accelerates the detection efficiency.

[0046] In one specific embodiment, the high-speed electrical detection system further includes a system base 100 for supporting the various components.

[0047] In one specific embodiment, the electrical signal measurement module 700 collects electrical signal information corresponding to the printed display panel 1000, and the optical signal measurement module 600 collects light emission information corresponding to the printed display panel 1000. The electrical signal information and light emission information are used to determine whether the detected light-emitting pixels are qualified. The light emission information includes brightness, wavelength, full width at half maximum (FWHM), and imaging; the electrical signal information includes current, voltage, and frequency.

[0048] In one specific embodiment, the light-emitting pixels of the printed display panel 1000 include a deposited functional layer and a light-emitting layer, and the high-speed electrical detection system performs electrical detection on the printed display panel 1000 without evaporating metal electrodes.

[0049] It should be noted that if a faulty light-emitting pixel is discovered after it has been fully processed, a significant amount of resources and processes will be wasted. This embodiment allows for the detection of light-emitting pixels before the metal electrode deposition is completed, enabling timely fault detection and preventing the subsequent deposition of metal electrodes on faulty pixels, thus avoiding the waste of resources and processes.

[0050] Furthermore, the light-emitting pixels of the printed display panel 1000 include a deposited functional layer and a light-emitting layer. The deposited functional layer includes an anode, and the high-speed electrical detection system can perform electrical detection on the printed display panel 1000 without the need for a cathode.

[0051] Furthermore, the light-emitting pixels of the printed display panel 1000 include a deposited functional layer and a light-emitting layer. The deposited functional layer includes a cathode, and the high-speed electrical detection system can perform electrical detection on the printed display panel 1000 without the need for an anode.

[0052] In one specific embodiment, the distance between the detection probe array and the printed display panel during the detection process is maintained between 0.5mm and 2mm, and the power supply voltage of the high-frequency AC power supply module is 4000V. The resulting electric field strength is 2000V / mm to 8000V / mm.

[0053] It should be noted that providing sufficient voltage and maintaining a reasonable distance can generate an electric field strong enough to guide the directional transport of charge carriers in the luminescent pixel.

[0054] In one specific embodiment, the detection probe array 400 includes a plurality of detection probes 900 arranged in an array. Each detection probe 900 is provided with a corresponding detection switch and one detection probe 900 corresponds to one light-emitting pixel. During the detection process, the detection probe array 400 controls the detection switch to enable adjacent detection probes 900 to start detection at different time periods.

[0055] It should be noted that this embodiment can effectively avoid mutual interference caused by adjacent light-emitting pixels being too close to each other and emitting light at the same time during the detection process, thereby affecting the acquisition of light information.

[0056] In one specific embodiment, the electrically controlled displacement module 500 is specifically used to: after the detection of the corresponding detection area of ​​the printed display panel 1000 is completed, transport the first substrate 200 or the detection probe array 400 so that the next detection area corresponds to the first substrate 200 or the detection probe array 400.

[0057] It should be noted that printed display panels 1000 are often quite large, making it difficult to cover the entire luminous pixel area with a single detection probe array 400. Therefore, each luminous pixel needs to be detected individually, and the electronically controlled displacement module 500 is used to detect each luminous pixel.

[0058] In one specific embodiment, the bottom area of ​​the detection probe 900 is not less than the area of ​​a single light-emitting pixel of the first substrate 200 to be detected, and the detection probe array 400 detects at least one light-emitting pixel each time.

[0059] It should be noted that the bottom area of ​​the detection probe 900 is not less than the area of ​​a single light-emitting pixel of the first substrate 200 to be tested, so that the light-emitting pixel can be effectively covered, avoiding missed detection and erroneous detection caused by incomplete coverage.

[0060] In one specific embodiment, the high-speed electrical detection system is in an anhydrous and oxygen-free environment.

[0061] It should be noted that an oxygen-free environment can prevent the first alternating electric field from being affected by moisture in the air.

[0062] In one specific embodiment, the detection probe 900 is composed of a planar conductive substrate and its supporting structure, and the area of ​​the planar conductive substrate is not less than the area of ​​a single light-emitting pixel of the first substrate 200 to be detected.

[0063] In one specific embodiment, the high-speed electrical detection steps of a high-speed electrical detection system applied to printed displays are as follows: (1) The display panel to be tested is placed on the upper surface of the conductive layer 300; (2) Under the drive of the electrically controlled displacement module 500, the detection probe array 400 and the first substrate 200 are kept at a certain distance, and the pixel array on the printed display panel 1000 is coupled with the maximum coupling area; (3) The high-frequency AC power supply module 800 applies a high-frequency electrical signal between the electrodes on the conductive layer 300 or the display panel to be tested and the detection probe array 400, so that multiple pixels coupled with the detection probe array 400 produce electroluminescence, and the light signal measurement module records the signal. (3) Record the light emission information of the detected pixels, and the electrical signal measurement module 700 records the electrical signal of the detected pixels; (4) The vertical distance between the detection probe array 400 and the display panel under test is kept constant by the electronically controlled displacement module 500, so that the detection probe array 400 and the printed display panel 1000 are coupled with the maximum coupling area. The detection probe array 400 moves along a certain direction and maintains continuous coupling with the printed display panel 1000 until the detection probe array 400 moves to the adjacent undetected area. The light signal measurement module records the light emission information of the detected pixels in the area to be detected, and the electrical signal measurement module 700 records the electrical signal of the detected pixels; (5) Repeat steps (3) and (4) until all pixels on the surface of the display panel under test are detected.

[0064] In one specific embodiment, the optical lens group and optical fiber (optical signal measurement module 600) used for optical signal measurement can be located inside the detection probe array 400, and the planar conductive substrate of the detection probe 900 has a transmittance of 30% to 90% in the visible light range. It should be noted that sufficient transmittance is to ensure that the luminous information can be better collected, thereby increasing the detection accuracy.

[0065] In one specific embodiment, the optical signal measurement module and the detection probe array 400 are located on the same side of the display panel to be tested, or they can be located on opposite sides.

[0066] In one specific embodiment, the detection probe array 400 may cover a functional layer, which may be a conductive material, a semiconductor material, an insulating material, or a composite structure thereof.

[0067] In one specific embodiment, the bottom surface of the detection probe 900 can be a regular shape such as a square, rectangle, or circle, or any polygonal shape that can be coupled to multiple QLED or OLED pixels on the printed display panel 1000. The area of ​​the planar conductive substrate of the detection probe 900 is 1 μm. 2 Up to 50cm 2 .

[0068] During the testing of QLED and OLED pixels:

[0069] The detection probe array 400 is parallel to the printed display panel 1000 and coupled to the printed display panel 1000 with the maximum coupling area, which can simultaneously cause multiple QLED and OLED pixels to produce electroluminescence.

[0070] Furthermore, the optical signal measurement module is required to obtain specific data such as brightness, wavelength, and full width at half maximum (FWHM) of the QLED or OLED panel being tested; the electrical signal measurement module 700 is required to obtain current and voltage data of the QLED or OLED panel being tested.

[0071] Furthermore, the outer surface of the planar conductive substrate of the detection probe 900 can be covered with a functional layer, which can be a conductive material, a semiconductor material, or an insulating material.

[0072] Furthermore, the area of ​​the planar conductive substrate of the detection probe 900 is 1μm2-50cm2.

[0073] Furthermore, the area of ​​the pixel array detected by the detection probe array 400 in one detection can be larger than the area of ​​the printed display panel 1000, or smaller than the area of ​​the printed display panel 1000.

[0074] Furthermore, the electronically controlled displacement module 500 is required to be able to selectively move and rotate the detection probe array 400 in three-dimensional space.

[0075] Furthermore, the electrical signal applied by the high-frequency AC power supply module 800 between the conductive layer 300 and the detection probe array 400 is an alternating voltage.

[0076] Furthermore, the conductive layer 300 can be disposed on the upper surface of the substrate or on the lower surface of the substrate.

[0077] Furthermore, the QLED and OLED panels being tested may be, but are not limited to, QLED and OLED panels disposed on a sapphire surface, QLED and OLED panels disposed on other transitional substrates, or QLED and OLED panels disposed on a driving backplane.

[0078] Furthermore, after the detection probe array 400 has finished detecting a planar QLED or OLED pixel array, the high-frequency AC power supply module 800 can continue to supply power until all pixels on the surface of the printed display panel 1000 have been detected; after the detection probe array 400 has finished detecting a planar QLED or OLED pixel array, the high-frequency AC power supply module 800 can also interrupt the power supply until the detection probe array 400 moves to another undetected area and then resumes the power supply.

[0079] Furthermore, the bottom surface of the detection probe 900 can be a regular shape such as a square, rectangle, or circle, or any polygonal shape that can be coupled to multiple QLED or OLED pixels on the printed display panel 1000.

[0080] In this embodiment of the invention, the detection probe array 400, driven by the electrically controlled displacement module 500, couples with multiple QLED and OLED pixels on the surface of the printed display panel 1000 at the maximum coupling area, thereby enabling simultaneous detection of QLED and OLED pixels without the need for evaporation electrodes, thus achieving the purpose of efficient detection.

[0081] In one specific embodiment, the specific shape of the detection probe 900 is not fixed and can be a cuboid (e.g., Figure 2 As shown), cylinder (such as) Figure 9 The probe 900 can be a regular geometric shape (as shown) or any irregular geometric shape that can be coupled to multiple QLED or OLED pixels on the printed display panel 1000. In this embodiment, a cuboid conductive material is preferred as the detection probe 900.

[0082] During the test, the printed display panel 1000 is placed on the upper surface of the conductive layer 300, and the detection probe 900 is placed above the printed display panel 1000 at a certain distance. In this embodiment, the lengths of the long side D, the wide side L, and the height H of the detection probe 900 are preferably 50 μm, 50 μm, and 100 μm, respectively (e.g., ...). Figure 3 (As shown).

[0083] To ensure that each detection probe 900 can illuminate one or more QLED or OLED pixels, the detection probe 900 consists of a planar conductive substrate 901 with a bottom area not less than 1000 pixels of the printed display panel and its supporting structure 902 (e.g., Figure 4 (As shown).

[0084] The optical signal measurement module 600 is integrated with the detection probe 900. The optical signal measurement module can be placed inside the detection probe 900, in which case the planar conductive substrate 901 of the detection probe 900 has a transmittance of 30% to 90% for visible light (e.g., Figure 5 (As shown).

[0085] The detection probe array 400, which integrates the optical signal measurement module 600, is positioned above the printed display panel 1000 to couple with multiple pixels on the display panel under test and collect optical signals (e.g., Figure 6 (As shown).

[0086] In one specific embodiment, the optical signal measurement module 600 and the detection probe 900 are not integrated into one unit. In this case, the optical signal measurement module 600 and the detection probe array 400 are respectively disposed on both sides of the printed display panel 1000, respectively realizing the functions of optical signal collection and coupling to multiple pixels on the display panel under test (e.g., ...). Figure 7 (As shown).

[0087] In one specific embodiment, the detection probe 900 has a micro / nano structure 903 at the planar conductive substrate 901. The micro / nano structure 903 alters the electric field distribution between the detection probe 900 and the conductive layer 300 to obtain more accurate detection results (e.g., ...). Figure 8 (As shown).

[0088] In one specific embodiment, the detection probe 900 is configured with a cylindrical geometry (e.g., ...). Figure 9 As shown, the cylindrical detection probe 900 should be capable of coupling with one or more QLED or OLED pixels on the printed display panel 1000.

[0089] The system of this invention includes a first substrate 200 containing a conductive layer 300 and a detection probe array 400 disposed opposite to the conductive layer 300. The detection probe array 400 includes at least one detection probe 900. The detection probe array 400 and the conductive layer 300 are electrically connected to a high-frequency AC power supply module 800. The high-frequency AC power supply module 800 supplies power to the detection probe array 400 and the conductive layer 300 to form a first alternating electric field between the detection probe array 400 and the conductive layer 300. The first alternating electric field is used to cause the printed display panel 1000 to emit light electroluminescence. This invention uses an electric field to guide the directional transport of charge carriers in the light-emitting pixels, thereby detecting whether the light-emitting pixels are qualified through electroluminescence, thus achieving non-contact detection and avoiding color damage caused by contact detection. Furthermore, compared to the existing probe detection technology, this invention can detect multiple light-emitting pixels with one detection probe 900, greatly improving detection efficiency. This invention has higher detection accuracy compared to optical microscopy imaging detection and electroluminescence detection.

[0090] In this embodiment of the invention, the high-speed electrical detection system is configured such that, in response to the anode of each light-emitting pixel in the printed display panel 1000 being located above the cathode, the optical signal measurement module 600 is controlled to collect light-emitting information during the half-cycle corresponding to the downward direction of the electric field in the first alternating electric field; otherwise, the optical signal measurement module 600 is controlled to collect light-emitting information during the half-cycle corresponding to the upward direction of the electric field in the first alternating electric field. This embodiment of the invention effectively reduces energy waste from continuously maintaining the collection state by controlling the optical signal measurement module 600 to collect data when the light-emitting pixel is emitting light and not to collect data when it is not emitting light. Simultaneously, collecting light signals at the correct light-emitting pixel's emission time can troubleshoot erroneously emitting pixels (a pixel emitting light at an other time is a fault, but it is still mistakenly detected as qualified because it emits light; this can effectively avoid such a situation).

[0091] The light-emitting pixels of the printed display panel 1000 in this embodiment of the invention include a deposited functional layer and a light-emitting layer. The high-speed electrical detection system performs electrical detection on the printed display panel 1000 without depositing metal electrodes. Performing electrical detection on the printed display panel 1000 while requiring metal electrode deposition allows for the timely detection of faulty light-emitting pixels. Compared to discovering and eliminating errors after the complete manufacturing of the light-emitting pixels, this effectively reduces process steps and resource waste.

[0092] The detection probe array 400 of this invention includes multiple detection probes 900 arranged in an array. Each detection probe 900 is equipped with a corresponding detection switch, and each detection probe 900 corresponds to one light-emitting pixel. During the detection process, the detection probe array 400 controls the detection switches to activate adjacent detection probes 900 at different time periods. This invention enables adjacent light-emitting pixels to emit light at different time periods, effectively avoiding mutual interference caused by simultaneous emission of adjacent light-emitting pixels. This makes the optical signal measurement module 600 more accurate and effectively improves the detection accuracy of light-emitting pixel faults.

[0093] In summary, the embodiments of the present invention can effectively improve detection efficiency and accuracy while avoiding damage to the printed display panel 1000 during detection.

[0094] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0095] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0096] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A high-speed electrical detection system applied to a printed display panel, characterized in that, The high-speed electric detection system comprises a first substrate comprising a conductive layer, and a detection probe array arranged opposite to the conductive layer; wherein, when the printed display panel is detected, the printed display panel is arranged between the first substrate and the detection probe array; the anode end, the light-emitting layer, and the cathode end of the light-emitting pixel of the printed display panel are in a sandwiched layer structure; The detection probe array comprises at least one detection probe, and the detection probe array and the conductive layer are respectively electrically connected with a high-frequency alternating current power supply module; the high-frequency alternating current power supply module is used for supplying power to the detection probe array and the conductive layer to form a first alternating electric field between the detection probe array and the conductive layer, and the first alternating electric field is used for electroluminescence of the printed display panel; wherein, when the first direction of the anode end of the light-emitting pixel pointing to the cathode end is the same as the electric field direction of the first alternating electric field, the printed display panel electroluminesces. The conductive layer is arranged beside an electric signal measurement module for collecting corresponding electric signal information of the printed display panel, and one side of the first substrate is arranged with a light signal measurement module for collecting corresponding light-emitting information of the printed display panel; the high-speed electric detection system further comprises an electrically controlled displacement module, which is used for carrying and transporting the first substrate or the detection probe array to match the positions of the detection probe array and the printed display panel during the detection process; The high-speed electric detection system is configured to: in response to the anode end of each light-emitting pixel in the printed display panel being located on the upper side of the cathode end, control the light signal measurement module to collect the light-emitting information in the half cycle corresponding to the downward direction of the electric field direction of the first alternating electric field; otherwise, control the light signal measurement module to collect the light-emitting information in the half cycle corresponding to the upward direction of the electric field direction of the first alternating electric field; The light-emitting pixel of the printed display panel comprises a deposited functional layer and the light-emitting layer, and the high-speed electric detection system detects the printed display panel without evaporating metal electrodes; The distance between the detection probe array and the printed display panel during the detection process is kept between 0.5 mm and 2 mm; The detection probe array comprises a plurality of array-arranged detection probes, each of which is provided with a corresponding detection switch, and one detection probe corresponds to one light-emitting pixel; the detection probe array controls the detection switches to enable adjacent detection probes to detect in different time periods during the detection process.

2. The high-speed electrical detection system for printed display panels according to claim 1, wherein The light-emitting pixel of the printed display panel comprises a deposited functional layer and the light-emitting layer, and the deposited functional layer comprises an anode, and the high-speed electric detection system detects the printed display panel without a cathode.

3. The high-speed electrical detection system for printed display panels of claim 1, wherein, The light-emitting pixel of the printed display panel comprises a deposited functional layer and the light-emitting layer, and the deposited functional layer comprises a cathode, and the high-speed electric detection system detects the printed display panel without an anode.

4. The high-speed electrical detection system for printed display panels of claim 1, wherein, The power supply voltage of the high-frequency alternating current power supply module is 4000 V.

5. The high-speed electrical detection system for printed display panels of claim 1, wherein, The electric control displacement module is specifically used for transporting the first substrate or the detection probe array so that the next detection area corresponds to the first substrate or the detection probe array after the detection of the corresponding detection area of the printed display panel is completed.

6. The high-speed electrical detection system for printed display panels of claim 1, wherein, The bottom area of the detection probe is not less than the area of a single light-emitting pixel of the first substrate to be detected, and the detection probe array corresponds to at least one light-emitting pixel during each detection.

7. The high-speed electrical detection system for printed display panels of claim 1, wherein, The high-speed electric detection system is in a water-oxygen-free environment.

8. The high-speed electrical detection system for printed display panels of claim 1, wherein, The detection probe is composed of a planar conductive substrate and a support structure thereof, and the area of the planar conductive substrate is not less than the area of a single light-emitting pixel of the first substrate to be detected.

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