Detection plate

Abstract

The invention discloses a detection board which comprises an input end slot, an output end slot and a detection circuit. The input end slot is coupled with an external power supply. The output end slot is coupled with the liquid crystal screen. The detection circuit is coupled between the input end slot and the output end slot, and the detection circuit is connected with the consumable and the connector. The detection circuit is used for executing the following operations: generating a first detection signal for detecting whether the consumable meets a first preset condition; generating a second detection signal, and detecting whether the connector meets a second preset condition; if the consumable and the connector respectively meet two preset conditions, an enabling signal is generated, and the system voltage is transmitted to the liquid crystal screen; the sub-circuit responds to the system voltage and conducts the detection circuit; and sequentially opening a plurality of pins of the output end slot according to the power supply sequence, and respectively transmitting the high voltage of each of the plurality of power supplies and the external power supply through the plurality of pins. The detection plate can judge whether the connecting assembly is a correct product or not in the detection process, the to-be-detected object is prevented from being damaged, and accidents are reduced.

Description

Technical Field

[0001] The present case relates to a detection board. Specifically, the present case relates to a detection board including a detection circuit with a protection mechanism. Background Art

[0002] The existing production process of LCD screens is connected with multiple consumables and multiple connectors. Among them, multiple consumables and multiple connectors transmit multiple voltages and multiple control signals to the LCD screen. When multiple consumables or multiple connectors are reversely inserted into the assembly printed circuit board of the LCD screen, the related components of the detection will be burned. In addition, the pin definition (pin assignment) of some products is designed with high voltage, and when it is incorrectly plugged into the assembly printed circuit board, it may cause the LCD screen and related components of the detection to burn.

[0003] Therefore, the above technology still has many defects, and it is necessary for practitioners in this field to develop other suitable detection panels. Summary of the invention

[0004] One aspect of the present case relates to a detection board. The detection board includes an input slot, an output slot, and a detection circuit. The input slot is used to couple to an external power source. The output slot is used to couple to a liquid crystal display. The detection circuit is coupled between the input slot and the output slot, and the detection circuit is connected to the consumables and the connector. The detection circuit is used to perform the following operations: generate a first detection signal to detect whether the consumable meets a first preset condition; generate a second detection signal to detect whether the connector meets a second preset condition; if the consumable meets the first preset condition and the connector meets the second preset condition, generate an enable signal to transmit a system voltage to the liquid crystal display; in response to the system voltage, turn on the sub-circuit of the detection circuit; and sequentially open multiple pins of the output slot according to the power supply sequence, so as to transmit high voltages of each of the multiple power sources and the external power source through the multiple pins.

[0005] In some embodiments, the sub-circuit includes a switching circuit.

[0006] In some embodiments, the switch circuit is used to transmit high voltages of each of the plurality of power sources and the external power source to the plurality of pins respectively according to a power supply sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The content of this case can be better understood by referring to the implementation methods in the subsequent paragraphs and the following figures:

[0008] Figure 1A It is a circuit block diagram of a liquid crystal screen and a detection board according to some embodiments of the present case;

[0009] Figure 1B Schematic diagrams of the front and back views of connection components according to some embodiments of the present invention;

[0010] Figure 2 It is a partial structural schematic diagram of a liquid crystal screen and a detection board according to some embodiments of the present case;

[0011] Figure 3 A schematic diagram of a timing sequence of power supply of a detection board according to some embodiments of the present invention;

[0012] Figure 4A A schematic diagram of a flexible printed circuit board connected to a liquid crystal screen according to some embodiments of the present invention is shown;

[0013] Figure 4B A schematic diagram of a flexible printed circuit board connected to a liquid crystal screen according to some embodiments of the present invention;

[0014] Figure 5A A schematic diagram of a circuit for connecting a detection pin of a liquid crystal screen according to some embodiments of the present invention;

[0015] Figure 5B is a schematic diagram of a low voltage regulator according to some embodiments of the present invention;

[0016] Figure 6 It is a partially enlarged schematic diagram of a liquid crystal screen, a flexible circuit board and a printed circuit board component according to some embodiments of the present case;

[0017] Figure 7 A schematic diagram of a liquid crystal display, a flexible circuit board, and a printed circuit board according to some embodiments of the present invention; and

[0018] Figure 8 A schematic diagram of testing electronic components according to some embodiments of the present invention is shown.

[0019] Wherein, the reference numerals are:

[0020] 100: Detection board

[0021] DS: LCD screen

[0022] FPC, FPC1, FPC[n]: Flexible printed circuit

[0023] PCBA, PCBA1, PCBA2: Printed Circuit Board Assembly

[0024] C: Connecting components

[0025] S1: First side

[0026] S2: Second side

[0027] GF: Gold Finger

[0028] I1: Input slot

[0029] J1: Output terminal slot

[0030] EN1: Enable signal

[0031] SVDD: System voltage source

[0032] VDD: system voltage

[0033] DC: Detection circuit

[0034] SW: Switching circuit

[0035] P1, P2: voltage

[0036] SP1, SP2: Power supply

[0037] SLP: Logic Voltage Source

[0038] LP: logic voltage

[0039] 20: Timing diagram

[0040] VH1, VH2, VH3: High voltage level

[0041] VL1, VL2, VL3: Low voltage level

[0042] ST1, ST2, ST3: Phase

[0043] SIC, SIC1, SIC[N]: Source driver chip

[0044] DET1, DET2, DET1[n], DET2[n]: Detection pins

[0045] V1: test voltage

[0046] GIC: AND gate chip

[0047] EN2: Power enable signal

[0048] SP: Power Supply

[0049] P3: Electricity

[0050] LDO: Low-Drop-Door Regulator

[0051] S1~S10:Signal

[0052] G1~G12: Interface

[0053] PWMIC: driver chip

[0054] T-com: Timing chip

[0055] CA: Component Area

[0056] SLOT1,SLOT2: slots

[0057] EC: Testing Electronic Components

[0058] LED1,LED2,LED3,THER,ABND,DD_CRB,DD_SDA,DD_SCL,FPC_DET_IN,FPC_DET_OUT,LDEP+,PIND3,NIND3,CCLKP,CCLKN,PIND2,NIND2,PIND1,NIND1,PIND0,NIND0: pin position

[0059] L1: Location DETAILED DESCRIPTION

[0060] The spirit of the present invention will be clearly explained below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person having ordinary knowledge in the technical field can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0061] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0062] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0063] The terms used herein generally have the ordinary meaning of each term used in the field, in the context of the present invention, and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0064] Figure 1A FIG. 1 is a schematic diagram of a circuit block of a liquid crystal display DS and a detection board 100 according to some embodiments of the present invention. Figure 1A The liquid crystal screen DS is coupled to the flexible circuit board FPC. The flexible circuit board FPC is connected to the printed circuit board assembly PCBA. The printed circuit board assembly PCBA is coupled to the detection board 100 through the connecting component C. In some embodiments, the connecting component C can be implemented as a consumable or a connector.

[0065] Figure 1B Schematic diagrams of the front and back views of the connection component C according to some embodiments of the present invention. Figure 1A and Figure 1B , Figure 1B The connected component C corresponds to Figure 1AThe connecting component C includes a first side S1 and a second side S2. The first side S1 is the front side of the connecting component C. The second side S2 is the back side of the connecting component C. The second side S2 includes a gold finger GF. The gold finger GF is a gold-plated connecting component located between the slots of the printed circuit board. It is named because its surface is gold-plated and arranged in a finger-like shape. The gold finger has two main functions. In addition to connecting the printed circuit board and the host of the product (such as a computer or LCD screen) to ensure that messages or instructions can be transmitted between the circuit boards, the gold finger can also protect the edge of the circuit board from wear and tear.

[0066] Figure 2 FIG. 1 is a partial structural diagram of a liquid crystal screen DS and a detection board 100 according to some embodiments of the present invention. Figure 2 The detection board 100 includes an input slot I1, an output slot J1, and a detection circuit DC. The input slot I1 is used to couple to an external power source (not shown). The output slot J1 is used to couple to a liquid crystal screen DS. The detection circuit DC is coupled between the input slot I1 and the output slot J1. In some embodiments, the input slot I1 and the output slot J1 can support a flexible printed circuit (Flexible Printed Circuit) or a carbon nanotube (Carbon Nanotube, CNT) product.

[0067] In some embodiments, see Figure 1A and Figure 2 , Figure 2 The detection circuit DC of the detection board 100 is connected to Figure 1A In some embodiments, the detection circuit DC can connect the consumable and the connector. In some embodiments, the detection circuit DC can also connect at least one of the consumable and the connector.

[0068] See also Figure 1A and Figure 2 The detection circuit DC of the detection board 100 is used to perform the following operations: the detection circuit DC generates a first detection signal to detect whether the connection component C (i.e., the consumable material) meets the corresponding preset condition stored in the detection circuit DC. The detection circuit DC generates a second detection signal to detect whether the connection component C (i.e., the connector or the product) meets the corresponding preset condition stored in the detection circuit DC.

[0069] If the connection component C (i.e., actually used as a consumable) meets the corresponding preset conditions (e.g., the type of consumable meets), and the connection component C (i.e., actually used as a connector or a product) meets the corresponding preset conditions (e.g., the connector model or product model meets), the detection circuit DC generates an enable signal EN1 to transmit the system voltage VDD of the system voltage source SVDD to the liquid crystal screen DS. In response to the system voltage VDD, the detection circuit DC turns on the sub-circuit of the detection circuit DC (e.g., the switch circuit SW). The detection circuit DC sequentially opens multiple pins (not shown in the figure) of the output terminal slot J1 according to the power supply sequence, thereby transmitting high voltages (e.g., voltage P1 or voltage P2) of each of the multiple power supplies and the external power supply (not shown in the figure) through the multiple pins. In some embodiments, the connection component C includes multiple pins. The output terminal slot J1 of the detection board 100 includes multiple pin slots to correspond to the multiple pins of the connection component C. In some embodiments, the power supply sequence here starts from a low voltage and gradually increases the voltage output with a low voltage. In other embodiments, the power supply sequence here means that the power supply is performed in a priority order that does not damage the circuit, regardless of the voltage size.

[0070] It should be noted that the switch circuit SW is used to temporarily isolate the high voltages (such as the high voltage levels of the voltages P1 and P2) of each of the multiple power supplies (such as the power supply SP1) and the external power supply (such as the power supply SP2) to ensure that each of the multiple power supplies and the external power supply (not shown) avoids the interference. Figure 1A The connected components C influence each other.

[0071] In some embodiments, the detection circuit DC transmits the logic voltage LP of the logic voltage source SLP to the printed circuit board assembly PCBA connected to the liquid crystal screen DS, and enables the detection circuit DC through the feedback signal (i.e., the enable signal EN1). In some embodiments, the logic voltage LP is 1.2 volts (Volt, V).

[0072] Figure 3 FIG2 is a timing diagram 20 of power supply of the detection board according to some embodiments of the present invention. Figure 2 and Figure 3 In stage ST1, the detection circuit DC transmits the logic voltage LP to the printed circuit board component according to the corresponding multiple pins to generate the enable signal EN1, and then transmits the high voltage level VH1 of the system voltage VDD of the system voltage source SVDD in stage ST2. In stage ST3, the system voltage VDD triggers the switch circuit SW to turn on, so that the high voltage level VH2 of the voltage P1 of the power source SP1 is transmitted to the liquid crystal screen DS. It should be noted that the high voltage level VH1, the high voltage level VH2 and the high voltage level VH3 are all different. It should be noted that if the connection component C is abnormally plugged, the detection circuit DC will not generate the enable signal EN1.

[0073] Figure 4A A schematic diagram of a flexible printed circuit board FPC connected to a liquid crystal screen DS is shown according to some embodiments of the present invention. In some embodiments, the liquid crystal screen DS includes a source driver chip SIC. The source driver chip SIC is used to receive a test voltage V1 and is used to match a plurality of detection pins (such as a detection pin DET1 and a detection pin DET2) to perform a detection process. The detection pins DET1 and DET2 are used to transmit the test results to transmit back to the test result. Figure 1A (or Figure 1B ) of the output terminal slot J1 of the detection board 100. In some embodiments, the test voltage V1 can be implemented as 3.3V.

[0074] Figure 4B Schematic diagram of multiple flexible circuit boards (e.g., flexible circuit board FPC1 and flexible circuit board FPC[n], where n is a positive integer) connected to a liquid crystal screen DS according to some embodiments of the present invention. In some embodiments, the liquid crystal screen DS includes multiple source driver chips (e.g., source driver chip SIC1 and source driver chip SIC[N]), where N is a positive integer. Compared to Figure 4A An embodiment of Figure 4B The multiple source driver chips (eg, source driver chip SIC1 ) do not support the detection process of multiple detection pins (eg, detection pin DET1 and detection pin DET2 ).

[0075] Figure 4B The circuit of each of the multiple flexible circuit boards (such as the flexible circuit board FPC1) is used to receive the test voltage V1, and is used with multiple detection pins (such as the detection pin DET1 and the detection pin DET2) to perform the detection process. The detection pin DET1 and the detection pin DET2 are used to transmit the test results to transmit back to Figure 1A (or Figure 1B ) of the output end slot J1 of the detection board 100. It should be noted that the flexible circuit board FPC[n] is similar to the flexible circuit board FPC1. The functions of the detection pins DET1[n] are similar to the functions of the detection pins DET1. The functions of the detection pins DET2[n] are similar to the functions of the detection pins DET2.

[0076] Figure 5A Schematic diagram of a circuit for connecting a detection pin of a liquid crystal screen according to some embodiments of the present invention. Figure 4A and Figure 5A, multiple detection pins (e.g., detection pin DET1, detection pin DET2, ..., detection pin DET1[n], detection pin DET2[n], detection pin DET[n]) are all coupled to the AND gate circuit chip GIC. The AND gate circuit chip GIC performs AND gate judgments on multiple detection pins. When the AND gate circuit chip GIC determines that all detection pins are correctly plugged in, the AND gate circuit chip GIC generates a power enable signal EN2 to the power supply SP of the liquid crystal screen DS. Then, the power supply SP outputs power P3 to the liquid crystal screen DS for operation. In some embodiments, multiple detection pins (e.g., detection pin DET1, detection pin DET2, ..., detection pin DET1[n], detection pin DET2[n], detection pin DET[n]) can be implemented as a group of two by two to form multiple detection groups to perform AND gate judgments. Then, a final result is output based on the multiple results of all the detection groups to determine whether all the detection pins are correctly plugged in.

[0077] Figure 5B Schematic diagram of a low voltage regulator LDO according to some embodiments of the present invention. Figure 4A , Figure 4B and Figure 5B , the low voltage regulator LDO is used to output the test voltage V1 to Figure 4A Source driver chip SIC or Figure 4B Multiple flexible circuit boards (for example, flexible circuit board FPC1 and flexible circuit board FPC[n], where n is a positive integer).

[0078] Figure 6 It is a partially enlarged schematic diagram of a liquid crystal screen DS, a flexible circuit board FPC and a printed circuit board component (such as a printed circuit board assembly PCBA1 and a printed circuit board assembly PCBA2) according to some embodiments of the present case. Figure 5A , Figure 5B and Figure 6, flexible circuit boards FPC and printed circuit board components (such as printed circuit board assemblies PCBA1 and printed circuit board assemblies PCBA2) can be designed to support products that can support flexible circuit boards (flexure circuit boards) or carbon nanotubes (Carbon Nanotube, CNT). Whether it is a flexible circuit board (flexure circuit board) or a carbon nanotube (Carbon Nanotube, CNT) product, at least one detection pin will be designed to recover the signals of all pins before performing an AND gate judgment of the pins. When the AND gate circuit chip GIC determines that all the detection pins are correctly plugged in, the AND gate circuit chip GIC generates a power enable signal EN2 to the power supply SP of the liquid crystal screen DS. The liquid crystal screen DS includes multiple interfaces (such as interfaces G1 to G12). The printed circuit board assembly PCBA1 and the printed circuit board assembly PCBA2 respectively include a timing chip T-com and a driver chip PWMIC.

[0079] Figure 7 Schematic diagram of a liquid crystal display DS, a flexible circuit board FPC and a printed circuit board assembly PCBA according to some embodiments of the present invention. Figure 2 and Figure 7 The flexible circuit board FPC is coupled between the LCD screen DS and the printed circuit board assembly PCBA. The printed circuit board assembly PCBA includes a component area CA, a slot SLOT1 and a slot SLOT2. The component area CA is used to place various chips and test components. The slot SLOT1 and the slot SLOT2 can be used as slots connected to various connectors. After the test, the test board 100 will be removed, and part of the circuit or electronic component design on the test board 100 will remain on the printed circuit board assembly PCBA and the LCD screen DS.

[0080] Figure 8 FIG. 1 is a schematic diagram of a test electronic component EC according to some embodiments of the present invention. Figure 8 The test electronic component EC includes a plurality of pins (e.g., pin LED1, pin LED2, pin LED3, pin THER, pin ABND, pin DD_CRB, pin DD_SDA, pin DD_SCL, pin FPC_DET_IN, pin FPC_DET_OUT, pin LDEP+, pin PIND3, pin NIND3, pin CCLKP, pin CCLKN, pin PIND2, pin NIND2, pin PIND1, pin NIND1, pin PIND0, NIND0). The pins FPC_DET_IN and FPC_DET_OUT at position L1 are used to be designed according to the aforementioned detection board 100 to avoid burning due to reverse connection.

[0081] According to the above embodiments, the present invention provides a detection board that can actively determine whether the connection component is a correct product (such as the correct consumables or the correct connector model) during the detection process. The present design can avoid damage to the object to be tested, reduce accidents, and improve product quality to reduce customer complaints.

[0082] Although the present invention is disclosed in detail with the embodiments as above, the present invention does not exclude other feasible implementations. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application, rather than being limited by the aforementioned embodiments.

[0083] For those skilled in the art, various changes and modifications can be made to the present invention without departing from the spirit and scope of the present invention. Based on the above embodiments, all changes and modifications made to the present invention are also included in the protection scope of the present invention.

Claims

1. A detection board, characterized in that: The test board contains: An input terminal slot for coupling to an external power source; An output end slot for coupling to a liquid crystal screen; and A detection circuit is coupled between the input end slot and the output end slot, and the detection circuit is connected to a consumable and a connector, wherein the detection circuit is used to perform the following operations: Generate a first detection signal to detect whether the consumable meets a first preset condition; Generating a second detection signal to detect whether the connector meets a second preset condition; If the consumable meets the first preset condition and the connector meets the second preset condition, an enabling signal is generated to transmit a system voltage to the LCD screen; In response to the system voltage, turning on a sub-circuit of the detection circuit; as well as The plurality of pins of the output end slot are opened in sequence according to a power supply sequence, so as to transmit a high voltage of each of the plurality of power supplies and the external power supply respectively through the pins.

2. The detection board according to claim 1, characterized in that: The sub-circuit includes a switch circuit.

3. The detection board according to claim 2, characterized in that: The switch circuit is used for respectively transmitting the high voltage of each of the power sources and the external power source to the pins according to the power supply sequence.

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