CN115148118A - Flexible circuit board and display device - Google Patents
Flexible circuit board and display device Download PDFInfo
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- CN115148118A CN115148118A CN202210794543.XA CN202210794543A CN115148118A CN 115148118 A CN115148118 A CN 115148118A CN 202210794543 A CN202210794543 A CN 202210794543A CN 115148118 A CN115148118 A CN 115148118A
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- 230000008054 signal transmission Effects 0.000 claims abstract description 51
- 238000004891 communication Methods 0.000 claims abstract description 31
- 230000009545 invasion Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 169
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 239000002356 single layer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
- G09F9/335—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/118—Printed elements for providing electric connections to or between printed circuits specially for flexible printed circuits, e.g. using folded portions
Abstract
The embodiment of the specification provides a flexible circuit board and a display device. The flexible circuit board includes: a signal transmission layer including a first data line for transmitting a communication signal; the protection line pattern is arranged on at least one side of the signal transmission layer and at least partially covers the first data line, the protection line pattern is electrically insulated from the first data line, the protection line pattern comprises a first protection line and a second protection line, and the first protection line and the second protection line are used for receiving different data protection signals. Because the protection line pattern at least partially covering the first data line is arranged, the protection line can be utilized to block external invasion, and because the data protection signals received by the first protection line and the second protection line are different, the difficulty of external invasion can be increased, and the safety of signal transmission is improved.
Description
Technical Field
The specification relates to the field of electronic devices, in particular to a flexible circuit board and a display device.
Background
In the using process of the electronic device, various types of important information such as personal privacy information, financial information and the like are transmitted, and with the development of technology, the problem of information transmission safety is more and more prominent. For example, there is transmission of communication signals during the use of electronic devices, and communication signals may be illegally acquired due to illegal connection during the transmission of communication signals, which may cause information leakage.
Therefore, in order to improve information security and ensure normal use of electronic devices, signal transmission protection needs to be performed on the electronic devices.
Disclosure of Invention
Embodiments in this specification provide a flexible circuit board and a display device, which are beneficial to improving information transmission security.
An embodiment of the present specification provides a flexible circuit board, including: a signal transmission layer including a first data line for transmitting a communication signal; the protection line pattern is arranged on at least one side of the signal transmission layer and at least partially covers the first data line, the protection line pattern is electrically insulated from the first data line, the protection line pattern comprises a first protection line and a second protection line, and the first protection line and the second protection line are used for receiving different data protection signals.
An embodiment of the present specification provides a display device including: the display module comprises a second data line for transmitting communication signals; the protection line pattern is arranged on at least one side of the second data line and at least partially covers the protection line pattern of the second data line, the protection line pattern is electrically insulated from the second data line, the protection line pattern comprises a first protection line and a second protection line, and the first protection line and the second protection line are used for receiving different data protection signals.
In the flexible circuit board provided by the embodiments of the present disclosure, since the protection line pattern at least partially covering the first data line is provided, the data line can be shielded by the protection line pattern, so as to prevent external intrusion; in addition, the protection line pattern comprises a first protection line and a second protection line, and the data protection signal received by the first protection line is different from the data protection signal received by the second protection line, so that the difficulty of external invasion can be increased, and the safety of signal transmission is improved.
Drawings
Fig. 1 is a schematic structural diagram of a flexible circuit board provided in an embodiment of the present specification.
Fig. 2 is a schematic structural diagram of a first protection line provided in one embodiment of the present specification.
Fig. 3 is a schematic structural diagram of a protection line pattern provided in one embodiment of the present specification.
Fig. 4 is a schematic structural diagram of a protection line pattern provided in one embodiment of the present specification.
Fig. 5 is a schematic structural diagram of a display device provided in one embodiment of the present specification.
Fig. 6 is a schematic structural diagram of a display device provided in one embodiment of the present specification.
Fig. 7 is a schematic structural diagram of a display device provided in one embodiment of the present specification.
Description of reference numerals: a signal transmission layer 100; a guard line pattern 200; a first protection line 210; a second protection line 220; a first subsection 211; the second subsection 221; an insulating layer 300; a display module 400; a display layer 410; a touch layer 420; a first flexible circuit board 510; a second flexible circuit board 520; a tamper switch 600; a printed circuit board 700.
Detailed Description
An embodiment of the present specification provides a flexible circuit board, including: a signal transmission layer 100 including a first data line for transmitting a communication signal; the protection line pattern 200 is disposed on at least one side of the signal transmission layer 100, and at least partially covers the first data line, the protection line pattern 200 is electrically insulated from the first data line, the protection line pattern 200 includes a first protection line 210 and a second protection line 220, and the first protection line 210 and the second protection line 220 are used for receiving different data protection signals.
Please refer to fig. 1. In some embodiments, the signal transmission layer 100 may be a single layer. The signal transmission layer 100 may have a first side and a second side opposite to the first side, and the guard line pattern 200 may be disposed at the first side of the signal transmission layer 100; alternatively, the guard line pattern 200 may be disposed at a second side of the signal transmission layer 100; alternatively, the guard line patterns 200 may be disposed at the first and second sides of the signal transmission layer 100. The protection line pattern 200 is disposed on at least one side of the signal transmission layer 100, and forms a structure in which the signal transmission layer 100 and the protection line pattern 200 are stacked.
In some embodiments, the signal transmission layer 100 may be a multilayer. The multiple signal transmission layers 100 may be stacked. The guard line pattern 200 may be provided separately for each layer of the signal transmission layer 100. For example, the signal transmission layer 100 has a first side and a second side opposite to the first side, and the guard line pattern 200 may be disposed at the first side of the signal transmission layer 100. The multi-layered signal transmission layer 100 and the guard line pattern 200 may form a stacked structure in which the signal transmission layer 100 and the guard line pattern 200 are repeatedly arranged. Alternatively, the common guard line pattern 200 may be partially or entirely provided in the multi-layered signal transmission layer 100. For example, the guard line patterns 200 are respectively disposed on the sides of the two signal transmission layers 100, which are located at the outermost sides, of the multiple signal transmission layers 100, facing away from each other, and only two guard line patterns 200 may be disposed, with the multiple signal transmission layers 100 each located between the two guard line patterns 200.
In some embodiments, the guard line pattern 200 is disposed on at least one side of the signal transmission layer 100. One side of the signal transmission layer 100 may be provided with one or more layers of the guard line pattern 200. The multi-layer protection line patterns 200 may be electrically connected to each other; alternatively, the plurality of protective line patterns 200 may be electrically insulated from each other.
In some embodiments, the signal transmission layer 100 may be a multilayer. An insulating layer 300 is disposed between the first data lines of the multi-layered signal transmission layer 100. The first data lines of the multi-layered signal transmission layer 100 may be electrically insulated from each other by an insulating layer 300; alternatively, a via hole may be formed through the insulating layer 300, and the first data line of the multi-layered signal transmission layer 100 may be electrically connected to the first data line through a conductive material in the via hole.
In some embodiments, the signal transmission layer 100 includes a first data line for transmitting a communication signal. The first data line located in the same signal transmission layer 100 may be plural; alternatively, the first data line located at the same signal transmission layer 100 may be a single line. The first data lines on the same signal transmission layer 100 may be a plurality of first data lines, and the plurality of first data lines may be used to transmit communication signals of the same function; alternatively, the plurality of first data lines may be used to transmit communication signals of different functions.
In some embodiments, the guard line pattern 200 at least partially covers the first data line, which may be a projection portion of the guard line pattern 200 on the signal transmission layer 100; alternatively, the first data line may be entirely covered by the orthographic projection of the protection line pattern 200 on the signal transmission layer 100. The area of the first data line covered by the protection line pattern 200 may be a continuous area, or may be a plurality of areas spaced apart from each other. The width of the first data line may be less than or equal to the width of the corresponding guard line pattern 200.
Please refer to fig. 1. In some embodiments, the protection line pattern 200 is electrically insulated from the first data line, and it may be that the protection line pattern 200 is electrically insulated from the first data line by the insulating layer 300.
In some embodiments, the flexible circuit board may include a multi-layer protection line pattern 200. The protection line patterns 200 positioned at different layers may be electrically insulated from each other; alternatively, the guard lines of the multi-layered guard line pattern 200 may also be partially electrically connected. The single-layer protection line pattern 200 may include a plurality of protection lines electrically insulated from each other.
Please refer to fig. 3. In some embodiments, the guard line pattern 200 includes a first guard line 210 and a second guard line 220, the first guard line 210 for receiving a data guard signal different from the second guard line 220 for receiving a data guard signal. The first protection line 210 and the second protection line 220 may be adjacent; alternatively, there may be another protection line between the first protection line 210 and the second protection line 220. It is understood that the first protection line 210 and the second protection line 220 are electrically insulated. The data protection signal may be a voltage signal and may be an encoded signal. The guard line pattern 200 may further include a third guard line for receiving a data guard signal different from both the second guard line 220 and the first guard line 210 for receiving the data guard signal. The guard line pattern 200 may protect a plurality of guard lines electrically insulated from each other, each of which is used for receiving a data guard signal different from each other.
In the flexible circuit board provided by the embodiment of the present disclosure, since the protection line pattern 200 is disposed on at least one side of the signal transmission layer 100, and the protection line pattern 200 at least partially covers the first data line, the protection line pattern can provide shielding for the first data line, so as to protect the signal transmission safety of the first data line. Since the first protection line 210 and the second protection line 220 are different in data protection signal for receiving, the difficulty of stealing data due to external intrusion is increased, and the security is further improved.
Please refer to fig. 2 and fig. 3. A first subsection 211 is indicated in fig. 2 by a dashed box, a indicating the first direction and b indicating the second direction. In some embodiments, the first protection line 210 includes a plurality of first sub-segments 211 arranged along a first direction, adjacent first sub-segments 211 are connected, the first sub-segments 211 are convex toward a second direction, the first direction intersects with the second direction, and the first direction and the second direction are parallel to a same plane. Please refer to fig. 2. The connection of adjacent first subsegments 211 may be that adjacent first subsegments 211 are directly connected. Please refer to fig. 3. For ease of understanding, a first subsection 211 is illustrated in fig. 3 by a dashed box. The connection of adjacent first subsegments 211 may be that adjacent first subsegments 211 are indirectly connected by a connection line. The first protection line 210 includes a plurality of first subsegments 211, the first subsegments 211 protrude in the second direction, the first direction intersects with the second direction, the first direction and the second direction are parallel to the same plane, each first subsegment 211 is a non-closed structure, or a region defined by the first subsegment 211 in an extending manner has a first gap; each first subsection 211 is convex in the second direction so that a certain area can be defined.
In some embodiments, the first sub-segment 211 may include at least one first routing segment and at least one second routing segment, the first routing segment and the second routing segment have different extending directions, and the first routing segment and the second routing segment are sequentially connected. For example, the first subsection 211 has a V-like font structure; alternatively, the first subsection 211 has a structure similar to a "U" -shaped font; alternatively, the first subsection 211 has a structure resembling a "W"; alternatively, the first sub-segment 211 has a substantially u-like structure.
In some embodiments, the plurality of first subsegments 211 may be the same size; or, may be different. The shape of the plurality of first subsegments 211 may be identical; or, may be different.
By arranging the first protection line 210 to include the plurality of first subsections 211, the arrangement direction of the first subsections 211 is different from the projection direction of the first subsections 211 and is parallel to the same plane, the richness of patterns of the first protection line 210 can be improved, the diversity of protection line patterns is further improved, and the difficulty of signal stealing is improved.
In some embodiments, the second protection line 220 may include a plurality of second sub-segments 221, the second sub-segments 221 may be arranged along a first direction, the second sub-segments 221 may be convex toward a third direction, the third direction intersects with the first direction, and the third direction and the first direction are parallel to the same plane. The third direction may be the same as the second direction. The third direction may be different from the second direction. The shape of the second subsection 221 may be the same as the shape of the first subsection 211; alternatively, the shape of the second sub-section 221 may be different from the shape of the first sub-section 211. The first sub-section 211 can partially surround the adjacent second sub-section 221, the first sub-section 211 partially surrounds the second sub-section 221, short circuit between the first protection line 210 and the second protection line 220 can be prevented, and meanwhile, the second sub-section 221 is partially embedded in a non-closed area defined by the extension of the first sub-section 211, which is beneficial to improving the compactness of routing arrangement in the protection line pattern.
Please refer to fig. 3 or fig. 4. In some embodiments, the second protection line 220 includes a plurality of second sub-segments 221 arranged along the first direction, adjacent second sub-segments 221 are connected, the second sub-segments 221 have the same shape as the first sub-segments 211, and the first sub-segments 211 partially surround the second sub-segments 221 adjacent to the first sub-segments 211. The second subsegment 221 has the same shape as the first subsegment 211, so that the preparation difficulty and short circuit risk of the protection line pattern can be reduced, the first subsegment 211 partially surrounds the second subsegment 221 adjacent to the first subsegment 211, and the second subsegment 221 is partially embedded into a non-closed area defined by the adjacent first subsegment 211, so that the compactness of routing in the protection line pattern can be improved, the coverage rate of the protection line pattern on a first data line can be improved, and the protection comprehensiveness can be improved.
In some embodiments, the signal transmission layer has a first side and a second side, the first side and the second side are opposite to each other, and the first side and the second side are respectively provided with at least one layer of protection line pattern. Protection line patterns are arranged on two opposite sides of the signal transmission layer, so that the protection comprehensiveness is improved. The shapes of the protection line patterns at the first and second sides may be different; the protection line patterns at the first and second sides may be different for the accessed data protection signals. Is favorable for improving the safety.
In some embodiments, the first protection line 210 on the first side includes a plurality of first subsegments 211 arranged along a first direction, adjacent first subsegments 211 are connected, the first subsegments 211 are convex towards a second direction, and the first direction intersects with the second direction and is parallel to the same plane; the first protection line 210 on the second side includes a plurality of first subsegments 211 arranged along a third direction, adjacent first subsegments 211 are connected, the first subsegments 211 protrude towards a fourth direction, and the third direction intersects with the fourth direction and is parallel to the same plane; the second direction intersects the fourth direction.
In some embodiments, the shape of the first protection wire 210 positioned at the first side and the second side may be the same by being rotated, or may be different. For example, the first sub-segments 211 of the first protection lines 210 located at the first side and the second side are all shaped like a V, adjacent first sub-segments 211 are directly connected, and the V-shaped openings of the first sub-segments 211 of the first protection lines 210 located at the first side and the second side are oriented differently, so that they can be rotated to be the same. It can be understood that, since the V-shaped openings of the first sub-segments 211 of the first protection line 210 located at the first side and the second side are oriented differently, the protruding directions of the first sub-segments 211 of the first protection line 210 located at the first side and the second side are correspondingly different.
In some embodiments, the opening orientations of the first subsegments 211 of the first protection line 210 located at the first side and the second side may be the same, and the protrusion directions may be different. The convex direction of the first subsection 211 may be along a direction perpendicular to the first direction, the angle between the most distant point of the contour of the first subsection 211 and the first direction.
In some embodiments, the second direction intersects with the fourth direction, and the protruding directions of the first subsegments 211 located on the first side and the second side are different, which is beneficial to improving the diversity of the wiring of the multilayer protection line pattern 200 and improving the difficulty of damaging the first data line.
Please refer to fig. 3 and 4.a denotes a first direction and b denotes a second direction. In some embodiments, a plurality of layers of guard line patterns are disposed on one side of the signal transmission layer, the first guard line 210 includes a plurality of first subsections 211 arranged along a first direction, adjacent first subsections 211 are connected, and the first subsections 211 are convex along a convex direction intersecting the first direction and parallel to the same plane with the first direction; the convex directions of the first subsections 211 of two adjacent layers of the first protection line 210 intersect. The protruding directions of the first subsections 211 of the two adjacent layers of the first protection lines 210 are intersected, so that the coverage of the protection line pattern 200 at the same side can be improved, the pattern density of the single-layer protection line pattern 200 can be reduced, the pattern density of the signal transmission layer 100 at the same side of the protection line pattern 200 can be ensured, and the process difficulty can be reduced, and the safety can be improved.
Embodiments of the present specification provide a display device. The display device may include: the display module 400, the display module 400 includes a second data line for transmitting communication signals; the protection line pattern 200 is disposed on at least one side of the second data line and at least partially covers the second data line, the protection line pattern 200 is electrically insulated from the second data line, the protection line pattern 200 includes a first protection line 210 and a second protection line 220, and the first protection line 210 and the second protection line 220 are used for receiving different data protection signals.
Please refer to fig. 5 and 6. In some embodiments, the display module 400 may include a display layer 410. The display layer 410 may include a light emitting layer and a driving layer. The light emitting layer may be a liquid crystal light emitting layer, and may be an organic light emitting diode. The driving layer is used for driving the light-emitting layer to emit light, so that display is realized. The display layer 410 includes a second data line, and particularly, the driving layer may include a second data line.
In some embodiments, the display module 400 includes a second data line for transmitting a communication signal; the display device includes a protection line pattern 200 disposed on at least one side of the second data line and at least partially covering the second data line. The second data line may have a first side on which the guard line pattern 200 may be disposed and a second side opposite to the first side; alternatively, the guard line pattern 200 may be disposed at the second side; alternatively, the guard line pattern 200 may be disposed at the first and second sides.
In some embodiments, the guard line pattern 200 may be disposed next to the second data line. Alternatively, other functional film layers are disposed between the protection line pattern 200 and the second data line. For example, the protection line pattern 200 may be disposed adjacent to the driving layer and electrically insulated from the second data line.
In some embodiments, the protection line pattern 200 is electrically insulated from the second data line, and an insulating layer may be between the protection line pattern 200 and the second data line.
In some embodiments, the guard line pattern 200 may include a plurality of guard lines. At least two of the plurality of protection lines are for receiving different data protection signals.
In some embodiments, the guard line pattern 200 may include a first guard line 210 and a second guard line 220, the first guard line 210 receiving a data guard signal different from the second guard line 220 receiving a data guard signal. It can be understood that the first protection line 210 and the second protection line 220 are electrically insulated such that the protection line pattern 200 receives different data protection signals for forming a plurality of protection loops. The first protection line 210 and the second protection line 220 of the flexible circuit board may be referred to in structure, and are not described herein again.
The display device provided by the embodiment of the present specification, because the protection line pattern 200 at least partially covering the second data line is disposed on at least one side of the second data line, the display device can play a role of shielding, and can prevent an external part from stealing direct access of a circuit, the protection line pattern 200 includes the first protection line 210 and the second protection line 220, the first protection line 210 and the second protection line 220 are used for receiving different data protection signals, thereby being beneficial to forming different protection loops, improving the stealing difficulty of communication signals, and improving the safety of the display device.
Please refer to fig. 5 and 6. In some embodiments, the display module 400 includes a touch layer 420 and a display layer 410 stacked together, the touch layer 420 includes a second data line, and the display layer 410 includes a second data line; at least one layer of protection line pattern 200 is arranged on one side of the touch layer 420 opposite to the display layer 410; at least one protection line pattern 200 is disposed on a side of the display layer 410 opposite to the touch layer 420.
In some embodiments, the display module 400 includes a touch layer 420 and a display layer 410 stacked together. The display module 400 may have a display side, which is a human eye observation side when the display module 400 displays. The touch layer 420 may be located on the display side of the display layer 410.
In some embodiments, the touch layer 420 includes driving electrodes and sensing electrodes, and traces for accessing driving signals for the driving electrodes and traces for accessing sensing signals for the sensing electrodes. The touch layer 420 includes a second data line, which may include a driving electrode, a sensing electrode, a trace connected to a driving signal, and a trace connected to a sensing signal. The communication signals required to be accessed by the touch layer can comprise driving signals and sensing signals.
In some embodiments, at least one protection line pattern 200 is disposed on a side of the touch layer 420 opposite to the display layer 410; at least one layer of the protection line pattern 200 is disposed on a side of the display layer 410 opposite to the touch layer 420. Since the touch layer 420 and the display layer 410 are stacked, the touch layer 420 and the display layer 410 are sandwiched between the protection line pattern 200 on the side of the touch layer 420 opposite to the display layer 410 and the protection line pattern 200 on the side of the display layer 410 opposite to the touch layer 420. The second data line may be protected while simplifying the structure of the display device.
In some embodiments, the protection line patterns 200 may be respectively disposed for the second data line of the touch layer 420 and the second data line of the display layer 410, and the protection line patterns 200 may be disposed between the touch layer 420 and the display layer 410.
In some embodiments, a side of the touch layer 420 opposite to the display layer 410 is provided with a multi-layer protection line pattern 200; and/or a multilayer protection line pattern 200 is arranged on one side of the display layer 410 opposite to the touch layer 420. The multilayer protection line pattern 200 may refer to the protection line pattern 200 of the flexible circuit board, and will not be described herein.
In some embodiments, the display device may include a first flexible circuit board 510, and a first data line of the first flexible circuit board 510 is electrically connected to a second data line of the display layer to access a communication signal of the display layer. The first flexible circuit board 510 may be a flexible circuit board in any of the above embodiments. Thereby protecting the security of the communication signals accessed by the display layer 410.
In some embodiments, the display device may include a second flexible circuit board 520, and the second flexible circuit board 520 is electrically connected to a second data line of the touch layer 420 to access a communication signal of the touch layer 420. The second flexible circuit board 520 may be the flexible circuit board in any of the above embodiments.
In some embodiments, the display device may include a first flexible circuit board, a first data line of the first flexible circuit board being electrically connected with a second data line of the display layer 410 for accessing a communication signal of the display layer; the first data line of the first flexible circuit board is electrically connected to the second data line of the touch layer 420 to access the communication signal of the touch layer 420. The first flexible circuit board may be the flexible circuit board in any of the above embodiments.
In some embodiments, the display device includes a plurality of protection loops, the protection loops include a first protection line 210 or a second protection line 220 of at least one protection line pattern 200, the first protection line 210 and the second protection line 220 included in the same protection line pattern 200 are located in different protection loops, and the first protection line 210 and the second protection line 220 included in the same protection line pattern 200 are used for receiving different data protection signals.
In some embodiments, the display device includes a plurality of protection circuits, which may include portions of one protection line pattern 200. For example, the protection line pattern in the protection loop is only the first protection line 210 of the protection line pattern 200 on the side of the display layer 410 opposite to the touch layer 420; alternatively, the one-layer guard line pattern 200 on the side of the display layer 410 opposite to the touch layer 420 may further include a third guard line, and the guard line loop may have the first guard line 210 and the third guard line of the one-layer guard line pattern 200 on the side of the display layer 410 opposite to the touch layer 420.
In some embodiments, the protection circuit may include portions of a plurality of protection line patterns 200, different protection line patterns 200 being connected in series with each other. For example, the protection circuit may include a first protection line 210 of one layer of the protection line pattern 200 at the side of the display module 400 and a second protection line 220 of one layer of the protection line pattern 200 at the side of the first flexible circuit board 510.
In some embodiments, the first protection line 210 and the second protection line 220 included in the same protection line pattern 200 are located in different protection loops, and the data protection signals received by the first protection line 210 and the second protection line 220 included in the same protection line pattern 200 are different, so that each layer of protection line pattern 200 can be connected to at least two loops with different data protection signals, which is beneficial to improving the transmission safety of communication signals of the display device.
In some embodiments, the data protection signals received by the first protection line 210 and the second protection line 220 of the same protection line pattern 200 are different, and the data protection signals received by the first protection line 210 or the second protection line 220 of the protection line pattern 200 of different layers may be the same.
In some embodiments, in the case that the touch layer 420 is not disposed in the display module 400, the first flexible circuit board 510 may be electrically connected to the protection line pattern 200 stacked with the display module 400, and the first flexible circuit board 510 is used to access a data protection signal for the protection line pattern 200 stacked with the display module 400.
In some embodiments, the guard line pattern 200 on the first flexible circuit board 510 accesses the data protection signal through the first flexible circuit board 510.
Please refer to fig. 5 and 6. In some embodiments, the first flexible circuit board 510 is electrically connected to the protection line pattern 200 on a side of the display layer 410 opposite to the touch layer 420, so as to access a data protection signal; and/or the second flexible circuit board 520 is electrically connected with the protection line pattern 200 on the side of the touch layer 420 opposite to the display layer 410 to access the data protection signal.
In some embodiments, the protection line pattern 200 on the side of the display layer 410 opposite to the touch layer 420 may be connected in series with the protection line pattern 200 on the first flexible circuit board 510, and located in the same protection loop; alternatively, the protection line pattern 200 on the side of the display layer 410 opposite to the touch layer 420 may be located in a different protection loop from the protection line pattern 200 on the first flexible circuit board 510; alternatively, the guard line pattern 200 on the side of the display layer 410 opposite to the touch layer 420 may be located in the same loop as the guard line pattern 200 on the side of the touch layer 420 opposite to the display layer 410.
In some embodiments, the guard line pattern 200 on the side of the display layer 410 opposite to the touch layer 420 may be located in a different protection loop from the guard line pattern 200 on the first flexible circuit board 510, and the guard line pattern 200 on the side of the display layer 410 opposite to the touch layer 420 may access the data protection signal through the first flexible circuit board 510. The protection line pattern 200 on the side of the display layer 410 opposite to the touch layer 420 may be located in the same protection loop as the protection line pattern 200 on the first flexible circuit board 510, the protection line pattern 200 on the first flexible circuit board 510 may access a data protection signal through the first flexible circuit board 510, and then the first flexible circuit board 510 is electrically connected to the protection line pattern 200 on the side of the display layer 410 opposite to the touch layer 420.
In some embodiments, the second flexible circuit board 520 is electrically connected to the protection line pattern 200 on a side of the touch layer 420 opposite to the display layer 410 to access the data protection signal. The protection line pattern 200 on the side of the touch layer 420 opposite to the display layer 410 may be connected in series with the protection line pattern 200 on the second flexible circuit board 520, and located in the same protection loop; alternatively, the protection line pattern 200 on the side of the touch layer 420 opposite to the display layer 410 may be located in a different protection loop from the protection line pattern 200 on the second flexible circuit board 520; alternatively, the guard line pattern 200 on the side of the display layer 410 opposite to the touch layer 420 may be located in the same loop as the guard line pattern 200 on the side of the touch layer 420 opposite to the display layer 410.
In some embodiments, the guard line pattern 200 on the side of the touch layer 420 opposite to the display layer 410 may be located in a different protection loop from the guard line pattern 200 on the second flexible circuit board 520, and the guard line pattern 200 on the side of the touch layer 420 opposite to the display layer 410 may access the data protection signal through the second flexible circuit board 520. The protection line pattern 200 on the side of the touch layer 420 opposite to the display layer 410 may be located in the same protection loop as the protection line pattern 200 on the second flexible circuit board 520, the protection line pattern 200 on the second flexible circuit board 520 may access a data protection signal through the second flexible circuit board 520, and then the second flexible circuit board 520 is electrically connected to the protection line pattern 200 on the side of the touch layer 420 opposite to the display layer 410.
Please refer to fig. 7. In some embodiments, the display device may include a printed circuit board 700 and a tamper switch 600, the tamper switch 600 having a first surface and a second surface opposite to each other, the printed circuit board 700 having an access contact and an output contact exposed from one side thereof, the display module 400, the tamper switch 600 having the access contact and the output contact having a holding state, in the holding state, the first surface of the tamper switch 600 being held against the display module 400, the second surface of the tamper switch 600 being connected to the access contact and the output contact, the access contact being used for accessing the data protection signal, and the output contact being used for outputting the data protection signal. It can be understood that, when the display device is assembled, the display module 400, the tamper switch 600, the access contact, and the output contact are in a holding state, so as to form a protection circuit. Under the condition that display module assembly 400 and printed circuit board 700 are unpacked apart, there is the risk of information leakage, and at this moment, including display module assembly 400, prevent unpacking switch 600, access contact and output contact no longer are in the state of holding, and the protection circuit breaks off.
In some embodiments, the tamper switch 600 may be in the same circuit as the protection line pattern 200. The guard line pattern 200 may be any guard line pattern 200 in the display device. For example, the protection line pattern 200 may be on a side of the display layer 410 opposite to the touch layer 420.
In some embodiments, the printed circuit board 700 is provided with a guard line pattern 200, the guard line pattern 200 of the printed circuit board 700 is at least located on a surface opposite to a side surface of the printed circuit board 700 where the access contacts are exposed, and the guard line pattern 200 of the printed circuit board 700 overlaps with projections of the access contacts and the output contacts on the printed circuit board 700, respectively. The anti-tamper switch 600 may be protected by providing the protection line pattern 200 on a surface of the printed circuit board 700 opposite to a surface of a side where the access contact is exposed, thereby preventing data on the printed circuit board 700 from being stolen.
In some embodiments, a display device may include: a secure chip, the secure chip comprising: the signal sending module is used for providing a data protection signal for the protection loop; the signal checking module is used for detecting the consistency of the output signal of the protection loop and the data protection signal; and the encryption module is used for generating a protection signal to interrupt the communication signal of the second data line under the condition that the output signal of the protection loop is inconsistent with the data protection signal.
In some embodiments, a display device may include: a secure chip, the secure chip comprising: the signal sending module is used for providing a data protection signal for the protection loop; the signal checking module is used for detecting the consistency of the output signal of the protection loop and the data protection signal; and the encryption module is used for generating a protection signal to interrupt the communication signal in the protection loop under the condition that the output signal of the protection loop is inconsistent with the data protection signal. The communication signal in the protection loop may be a first data signal; or, may be the second data line. Only the communication signal of the protection loop whose output signal does not coincide with the data protection signal may be interrupted. Alternatively, the communication signals in all protection loops may be interrupted.
In some embodiments, the protection signal may be such that the display device is in a self-locking state or a sleep state.
In some embodiments, the tamper switch 600 is plural. The quantity of anti-disassembly switches is more than or equal to 2, and the anti-disassembly switches surround the security chip. The number of the anti-tamper switches may be 2, and two anti-tamper switches 600 may be disposed on opposite sides of the security chip, which is advantageous to improve security.
In some embodiments, the tamper switch 600 is greater than two in number, and the security chip is located within a defined virtual protection area of the tamper switch 600. The virtual protection area may be an area defined by virtual connection lines between adjacent tamper switches 600. The security chip is located within a defined virtual protection area of the tamper switch 600 so that a protection signal can be generated to interrupt transmission of a communication signal in the case where the printed circuit board 700 and the display module 400 are detached.
In some embodiments, the protection loop accesses the data protection signal within the virtual protection zone. The safety of signal transmission is improved.
In the present specification, the embodiments themselves are emphasized differently from the other embodiments, and the embodiments can be explained in contrast to each other. Any combination of the embodiments in the present specification by a person skilled in the art based on general technical common knowledge is covered in the disclosure of the present specification.
The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.
The above description is only a few embodiments of the present disclosure, and should not be taken as limiting the present disclosure, and any modifications, equivalents and the like that are within the spirit and principle of the present disclosure should be included in the disclosure of the present disclosure.
Claims (16)
1. A flexible circuit board, comprising:
a signal transmission layer including a first data line for transmitting a communication signal;
the protection line pattern is arranged on at least one side of the signal transmission layer and at least partially covers the first data line, the protection line pattern is electrically insulated from the first data line, the protection line pattern comprises a first protection line and a second protection line, and the first protection line and the second protection line are used for receiving different data protection signals.
2. The flexible circuit board of claim 1, wherein the first protection line comprises a plurality of first subsections arranged along a first direction, adjacent first subsections are connected, the first subsections are convex towards a second direction, the first direction intersects with the second direction, and the first direction and the second direction are parallel to a same plane.
3. The flexible circuit board according to claim 2, wherein the second protection line includes a plurality of second subsections arranged along the first direction, adjacent second subsections are connected, the second subsections are the same in shape as the first subsections, and the first subsections partially surround the second subsections adjacent to the first subsections.
4. The flexible circuit board of claim 1, wherein the signal transmission layer has a first side and a second side, the first side being opposite the second side, the first side and the second side each being provided with at least one layer of the protection line pattern.
5. The flexible circuit board of claim 4,
the first protection line positioned on the first side comprises a plurality of first subsections arranged along a first direction, the adjacent first subsections are connected, the first subsections are convex towards a second direction, and the first direction is intersected with the second direction and is parallel to the same plane; the first protection line positioned on the second side comprises a plurality of first subsegments arranged along a third direction, the adjacent first subsegments are connected, the first subsegments are convex towards a fourth direction, and the third direction is intersected with the fourth direction and is parallel to the same plane; the second direction intersects the fourth direction.
6. The flexible circuit board according to claim 1, wherein a plurality of layers of the guard line patterns are disposed on one side of the signal transmission layer, the first guard line includes a plurality of first subsections arranged along a first direction, adjacent first subsections are connected, and the first subsections are convex along a convex direction which intersects with the first direction and is parallel to the same plane with the first direction; the convex directions of the first subsections of the two adjacent layers of the first protection lines are intersected.
7. A display device, comprising:
the display module comprises a second data line for transmitting communication signals;
the protection line pattern is arranged on at least one side of the second data line and at least partially covers the protection line pattern of the second data line, the protection line pattern is electrically insulated from the second data line, the protection line pattern comprises a first protection line and a second protection line, and the first protection line and the second protection line are used for receiving different data protection signals.
8. The display device according to claim 7, wherein the display module comprises a touch layer and a display layer stacked together, the touch layer comprising the second data line, and the display layer comprising the second data line; at least one layer of protection line pattern is arranged on one side, back to the display layer, of the touch layer; and at least one layer of the protection line pattern is arranged on one side of the display layer, which is back to the touch layer.
9. The display device according to claim 8, further comprising a first flexible circuit board and a second flexible circuit board, wherein a first data line of the first flexible circuit board is electrically connected with a second data line of the display layer to access a communication signal of the display layer; the first data line of the second flexible circuit board is electrically connected with the second data line of the touch layer so as to access the communication signal of the touch layer; the first flexible circuit board and the second flexible circuit board adopt the flexible circuit board of any one of claims 1 to 6.
10. The display device according to claim 9, wherein the display device comprises a plurality of protection circuits, the protection circuits comprise the first protection line or the second protection line of at least one of the protection line patterns, the first protection line and the second protection line included in the same protection line pattern are located in different protection circuits, and the first protection line and the second protection line included in the same protection line pattern are configured to receive different data protection signals.
11. The display device according to claim 9, wherein the first flexible circuit board is electrically connected to the protection line pattern on a side of the display layer opposite to the touch layer to access the data protection signal; and/or the second flexible circuit board is electrically connected with the protection line pattern on one side of the touch layer back to the display layer so as to access the data protection signal.
12. The display device according to claim 7, further comprising a printed circuit board and a tamper switch, wherein the tamper switch has a first surface and a second surface opposite to each other, one side of the printed circuit board is exposed with an access contact and an output contact, the display module, the tamper switch, the access contact and the output contact have a holding state, in the holding state, the first surface is held against the display module, the second surface is connected with the access contact and the output contact, the access contact is used for accessing the data protection signal, and the output contact is used for outputting the data protection signal.
13. A display device as claimed in claim 12, characterized in that the printed circuit board is provided with a pattern of guard lines, which is at least on the surface opposite to the surface of the printed circuit board on the side where the access contacts are exposed, the pattern of guard lines of the printed circuit board overlapping the projections of the access contacts and the output contacts on the printed circuit board, respectively.
14. The display device according to claim 10 or 12, further comprising: a secure chip, the secure chip comprising:
the signal sending module is used for providing the data protection signal for the protection loop;
the signal checking module is used for detecting the consistency of the output signal of the protection loop and the data protection signal;
and the encryption module is used for generating a protection signal to interrupt the communication signal of the second data line under the condition that the output signal of the protection loop is inconsistent with the data protection signal.
15. The display device according to claim 14, wherein the number of the tamper switches is greater than two, and the security chip is located within a virtual protection area defined by the tamper switches.
16. The display device as claimed in claim 15, wherein the protection loop accesses the data protection signal within the virtual protection zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210794543.XA CN115148118A (en) | 2022-07-07 | 2022-07-07 | Flexible circuit board and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210794543.XA CN115148118A (en) | 2022-07-07 | 2022-07-07 | Flexible circuit board and display device |
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| CN115148118A true CN115148118A (en) | 2022-10-04 |
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| CN202210794543.XA Pending CN115148118A (en) | 2022-07-07 | 2022-07-07 | Flexible circuit board and display device |
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