Circuit board and electronic device including same

Abstract

The invention discloses a circuit substrate with multiple voltage input sources. A substrate includes an active region and a peripheral region surrounding the active region. A signal transmission structure is disposed on the active region and the peripheral region. And the conductive structure is arranged on the peripheral area, is electrically connected with the signal transmission structure, and comprises a first conductive wiring, a second conductive wiring and a convergence wiring. The convergence wiring receives a first signal and a second signal from the first wire wiring and the second wire wiring, respectively, at a first end. The second end of the convergence wiring outputs a third signal to the signal transmission structure. The third signal is a common voltage.

Description

Technical Field

[0001] The present disclosure relates to a circuit substrate. Background Art

[0002] The pixel display of the display is usually driven by the voltage difference between the data signal and the common voltage (Vcom). The common voltage (Vcom) is ideally a constant DC potential.

[0003] In actual operation, the common voltage (Vcom) is easily interfered by other signals. Resistor-capacitor loading (RCloading) can also cause the common voltage (Vcom) to drift.

[0004] How to provide a stable common voltage (Vcom) to enable a display to display images stably is an important issue in the technical field. Summary of the invention

[0005] A circuit substrate implemented according to one embodiment of the present case receives a voltage from multiple input sources. The circuit substrate includes a substrate, a signal transmission structure, and a conductive structure. The substrate includes an active area and a peripheral area; the peripheral area surrounds the active area. The signal transmission structure is disposed on the active area and the peripheral area. The conductive structure is disposed on the peripheral area, electrically connected to the signal transmission structure, and includes a first conductive wiring, a second conductive wiring, and a convergent wiring. The convergent wiring electrically connects the first conductive wiring and the second conductive wiring, and the convergent wiring includes a first end and a second end. The first end is used to receive a first signal from the first wire wiring and a second signal from the second wire wiring. The second end is used to output a third signal to the signal transmission structure. The third signal can be a common voltage (Vcom).

[0006] In one embodiment, the first conductive wiring and the second conductive wiring are in a mirror structure relative to the convergent wiring, so that the common voltage (Vcom) is more stable and the display device has a more ideal image.

[0007] In one embodiment, the aforementioned circuit substrate is further used to implement an electronic device. In addition to the aforementioned circuit substrate, an electronic device further includes a first circuit board and a second circuit board. The first circuit board is connected to the circuit substrate to output the first signal to the first conductive wiring. The second circuit board is connected to the circuit substrate to output the second signal to the second conductive wiring. The electronic device may further include a color filter and a liquid crystal layer. The liquid crystal layer is disposed between the circuit substrate and the color filter. The electronic device may be a display device.

[0008] The following is a detailed description of the present disclosure with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1A A circuit substrate implemented according to one embodiment of the present invention is illustrated;

[0010] Figure 1B A transparent conductive layer of the signal transmission structure is further indicated;

[0011] Figure 2A , Figure 2B Various patterns of the conductive structure (including the first conductive wiring D1, the second conductive wiring D2, and the converging wiring D) are illustrated;

[0012] Figure 3 An electrostatic protection design is illustrated according to one embodiment of the present invention;

[0013] Figure 4A as well as Figure 4B A bridge-like structure B is further illustrated according to different implementations of the present case;

[0014] Figure 5 According to one embodiment of the present invention, the design of the first conductive wiring D1 (or the second conductive wiring D2) pad connection is illustrated; and

[0015] Figure 6 A cross-sectional view of a display device implemented according to one embodiment of the present invention is illustrated.

[0016]

Explanation of symbols

[0017] 100: circuit substrate;

[0018] 102:Substrate;

[0019] 104: Active Zone

[0020] 106: Conductive ring structure

[0021] 110: Transparent conductive layer

[0022] 112: Holes

[0023] 114, 116: first and second circuit boards

[0024] 302: Electrostatic protection component

[0025] 304: Holes

[0026] 602: Active Components

[0027] 604: Pixel electrode

[0028] 606: Conductive structure

[0029] 608: Color filter

[0030] 610: Liquid crystal layer

[0031] 6081: Back-plated transparent conductive layer

[0032] 6082:Substrate

[0033] 6083: Dye

[0034] 6084: Black Matrix

[0035] 6085: Protective layer

[0036] bp1…bp9: solder pad

[0037] D1, D2: first and second conductive wiring

[0038] D: Aggregation Cabling

[0039] E1, E2: The first and second ends of the converged cabling

[0040] L1: Length of the first part (wide part) of the converged wiring D

[0041] LD: Total length of the converged wiring D

[0042] S1, S2: first and second signals

[0043] V1, V2: through hole

[0044] Vcom: common voltage

[0045] W1: Width W1 of D1

[0046] W2: The width of each pad bp2, bp3, bp4 W2

[0047] Wmax: Maximum width of the aggregation wiring D DETAILED DESCRIPTION

[0048] The following description lists various embodiments of the present invention. The following description introduces the basic concept of the present invention and is not intended to limit the content of the present invention. The actual scope of the invention should be defined in accordance with the scope of the patent application.

[0049] Figure 1AA circuit substrate 100 according to one embodiment of the present invention is illustrated, wherein a substrate 102 includes an active area 104 and a peripheral area surrounding the active area 104. A signal transmitting structure is disposed on the active area 104 and the peripheral area, including a conductive ring 106 disposed on the peripheral area.

[0050] In particular, the circuit substrate 100 further has a conductive structure disposed on the peripheral area and electrically connected to the signal transmission structure (106). The conductive structure has a first conductive wiring D1, a second conductive wiring D2, and a convergent wiring D. The convergent wiring D electrically connects the first conductive wiring D1 and the second conductive wiring D2, and the convergent wiring D includes a first end E1 and a second end E2. The first end E1 of the convergent wiring D receives a first signal S1 from the first wire wiring D1, and receives a second signal S2 from the second wire wiring D2. The second end E2 of the convergent wiring D outputs a third signal (referred to as S3) to the signal transmission structure (106). In one embodiment of the present disclosure, the first signal S1, the second signal S2, and the third signal S3 are a common voltage Vcom, but the present disclosure is not limited thereto.

[0051] As shown in the figure, the conductive ring structure 106 itself has an interface to receive the common voltage Vcom, which can be regarded as the main input terminal of the common voltage Vcom. In this case, an auxiliary input terminal of the common voltage Vcom is proposed; the first conductive wiring D1 and the second conductive wiring D2 of the mirror layout receive the auxiliary input common voltage Vcom from the flexible printed circuit board (Flexible Printed Circuit, referred to as FPC) on the left and right half of the long side of the circuit substrate 100, and then transmit it to the conductive ring structure 106 (for example, to the center point of the conductive ring structure 106 on the long side of the circuit substrate 100) through the convergent wiring D.

[0052] The common voltage Vcom that is mirrored to the convergence wiring D will balance the resistance and capacitance interference and reduce the taste difference between the left and right images. In particular, if any of the first conductive wiring D1 and the second conductive wiring D2 is disconnected, the convergence wiring D can maintain the conductive ring structure 106 at the long side of the circuit substrate 100 to uniformly receive the common voltage Vcom.

[0053] The conductive ring structure 106 shown in the figure completely surrounds the active region 104 . In other embodiments, the conductive ring structure 106 is in the form of a ring with an opening and is adjacent to at least three sides of the active region 104 .

[0054] Figure 1B A transparent conductive layer 110 of the signal transmission structure is further indicated, which is disposed on the active region 104 and a portion of the peripheral region and is electrically connected (via a hole 112 ) to the conductive ring structure 106 .

[0055] The circuit substrate 100 is further used to implement an electronic device, such as a liquid crystal display, a light emitting display, etc., or other display or non-display technologies. Figure 1B Indicated, the electronic device further includes a first circuit board 114 and a second circuit board 116. The first circuit board 114 is connected to the circuit substrate 100 to output the first signal Vcom to the first conductive wiring D1. The second circuit board 116 is connected to the circuit substrate 100 to output the second signal Vcom to the second conductive wiring D2. The electronic device may include a display device, a backlight device, an antenna device, a sensing device or a splicing device, but is not limited thereto. The electronic device may be a bendable or flexible electronic device. The display device may be a non-self-luminous display device or a self-luminous display device. The antenna device may be a liquid crystal antenna device or a non-liquid crystal antenna device, and the sensing device may be a sensing device for sensing capacitance, light, heat or ultrasound, but is not limited thereto. The electronic components may include passive components and active components, such as capacitors, resistors, inductors, diodes, transistors, etc. The diode may include a light emitting diode or a photodiode. The light emitting diode may include, for example, an organic light emitting diode (OLED), a sub-millimeter light emitting diode (mini LED), a micro LED, or a quantum dot light emitting diode (quantum dot LED), but is not limited thereto. The splicing device may be, for example, a display splicing device or an antenna splicing device, but is not limited thereto. It should be noted that the electronic device may be any combination of the aforementioned, but is not limited thereto. The following text will use a display device as an electronic device or a splicing device to illustrate the contents of the present disclosure, but the present disclosure is not limited thereto.

[0056] Figure 2A , Figure 2BThe diagrams illustrate various patterns of the conductive structure (including the first conductive wiring D1, the second conductive wiring D2, and the convergence wiring D). The first conductive wiring D1 and the second conductive wiring D2 in the figure are parallel mirror images converged to the convergence wiring D, and the tower shape of the convergence wiring D has various designs. In other embodiments, the first conductive wiring D1 and the second conductive wiring D2 conform to the layout of other circuits and converge to the convergence wiring D in a slope mirror shape. In addition to the illustrated content, the pattern details can also be grid wiring or fence wiring. In particular, the figure shows that the first conductive wiring D1 and the second conductive wiring D2 are mirror images.

[0057] The width of the convergence wiring D is also specially designed; the so-called width is measured in a direction perpendicular to the extension direction of the convergence wiring D. Due to the circuit layout, the convergence wiring D may not be of equal width. According to the maximum width of the convergence wiring D is Wmax, the convergence wiring D can be divided into a first part (wide part) and a second part (narrow part). The area that reaches a certain percentage of the maximum width Wmax of the convergence wiring D is considered to be the first part (wide part), and the rest is considered to be the second part (narrow part). In addition, the length parallel to the extension direction of the convergence wiring D is also specially designed. The total length of the convergence wiring D is LD, and the length of its first part (wide part) is L1. The length L1 of the first part (wide part) must account for more than a certain proportion of the total length LD of the convergence wiring D.

[0058] Figure 2B Use unequal width convergence cabling D. Figure 2A The same width of the converged wiring D is used. These converged wiring D do follow the above proportion principle. Under such a design, the converged wiring D can be controlled at a reasonable resistance value, reducing the degree of voltage drop generated during the conduction process and affecting the potential of the common voltage Vcom in the plane.

[0059] In one implementation, the portion not narrower than 30% (30% Wmax) of the maximum width Wmax is the first portion (wide portion), and the rest is the second portion (narrow portion).

[0060] In one embodiment, a ratio of the length L1 of the first portion (wide portion) to the total length LD is greater than (or equal to) 50%.

[0061] In another embodiment, a ratio of the length L1 of the first portion (wide portion) to the total length LD is greater than (or equal to) 70%.

[0062] Figure 3According to one embodiment of the present invention, an electrostatic protection component (ESD) design is illustrated. As shown in the figure, the circuit substrate 100 further includes an electrostatic protection component 302, which is electrically connected to the convergence wiring D. The transparent conductive layer 110 can also be electrically connected to the electrostatic protection component 302 through the hole 304. The convergence wiring D will be wider than the data line due to resistance considerations. In order to reduce the probability of the convergence wiring D providing an electrostatic path to damage the components in the surface, the present invention sets an electrostatic protection component 302 for the convergence wiring D outside the conductive ring structure 106.

[0063] Figure 4A as well as Figure 4B A bridge structure B is further illustrated according to different embodiments of the present invention. In addition to the aforementioned first conductive wiring D1, second conductive wiring D2, and convergence wiring D, the conductive structure for auxiliary input of the common voltage Vcom in the present invention further includes a bridge structure B. The first conductive wiring D1 is electrically connected to the first end E1 of the convergence wiring D via the bridge structure B, and the second conductive wiring D2 is electrically connected to the first end E1 of the convergence wiring D via the bridge structure B. As shown in the figure, the bridge structure B has rows of equidistant through holes V1, which are used to conduct the bridge structure B with the first conductive wiring D1, the bridge structure B with the second conductive wiring D2, and the bridge structure B with the convergence wiring D, so as to realize electrical connection between different layers.

[0064] In one embodiment, the bridge structure B is located on a first layer of the circuit substrate 100, and the first conductive wiring D1, the second conductive wiring D2, and the convergent wiring D are located on a second layer of the circuit substrate 100. The first layer and the second layer have different distances relative to the substrate 102, for example, the distance of the first layer relative to the substrate 102 is greater than the distance of the second layer relative to the substrate 102. In this way, the conductive layer transfer technology can help control the resistance of the entire circuit and adjust the voltage difference between the Vcom auxiliary input (input via D1 and D2) and the Vcom main input (generally received by the conductive ring structure 106). The bridge structure B of the conductive layer transfer also has an electrostatic protection function.

[0065] Figure 5 According to an embodiment of the present invention, the design of the bonding pad connection of the first conductive wiring D1 is illustrated. This technology is also applied to the second conductive wiring D2.

[0066] The circuit substrate 100 further includes a plurality of bonding pads bp1 to bp9 disposed on the peripheral area. The first conductive wiring D1 is shown to be electrically connected to three bonding pads bp2, bp3, and bp4 through a plurality of through holes V2. The width W1 of the first conductive wiring D1 is more than twice the width W2 of each bonding pad bp2, bp3, and bp4. In a typical embodiment, the first conductive wiring D1 is electrically connected to at least two of these bonding pads. Such a cross-pad design can effectively reduce the interface resistance and reduce the degree to which the Vcom auxiliary input is pulled by other signals.

[0067] Figure 6 A cross-sectional view of a display device implemented according to one embodiment of the present invention is illustrated, wherein an active component 602 is disposed on the active region 104 of the substrate 102. A pixel electrode 604 is electrically connected to the active component 602. The pixel electrode 604 and a conductive structure 606 (e.g., a transparent conductive layer 110) overlap each other. The display device further includes a color filter 608 (e.g., including a back-plated transparent conductive layer 6081, a substrate 6082, a dye 6083, a black matrix 6084, a protective layer 6085, etc.), and a liquid crystal layer 610. The liquid crystal layer 610 is disposed between the circuit substrate 100 and the color filter 608.

[0068] One embodiment of the present disclosure is a liquid crystal display (LCD), which is related to a TFT structure. In addition to the liquid crystal panel technology shown, the voltage-assisted input technology of the present invention can also be applied to any other display technology or non-display technology.

[0069] Any circuit substrate using the first conductive wiring D1, the second conductive wiring D2, and the converging wiring D as a conductive structure for auxiliary voltage input is related to the present invention. A display using such a circuit substrate and an electronic device using such a display are also related to the present invention.

[0070] The features of the various embodiments may be mixed and matched as desired as long as they do not violate the spirit of the invention or conflict with each other.

[0071] Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the patent application attached hereto.

Claims

1. A circuit substrate, characterized in that: include: A substrate including an active region and a peripheral region surrounding the active region; A signal transmission structure is disposed on the active area and the peripheral area; as well as a conductive structure, disposed on the peripheral region, electrically connected to the signal transmission structure, and comprising a first conductive wiring, a second conductive wiring, and a convergence wiring, in: The aggregation wiring is electrically connected to the first conductive wiring and the second conductive wiring, and the aggregation wiring includes a first end and a second end; The first end is used to receive a first signal from the first wire wiring and a second signal from the second wire wiring; and The second end is used to output a third signal to the signal transmission structure.

2. The circuit substrate according to claim 1, wherein: The signal transmission structure includes a conductive ring structure, which is disposed on the peripheral area and adjacent to at least three sides of the active area for receiving the third signal.

3. The circuit substrate according to claim 2, wherein: The signal transmission structure further includes a transparent conductive layer, which is disposed on the active area and a portion of the peripheral area and is electrically connected to the conductive annular structure.

4. The circuit substrate according to claim 1, wherein: The third signal is a common voltage.

5. The circuit substrate according to claim 1, wherein: The converged wiring is divided into a first part and a second part; The width of the first portion is not narrower than 30% of a maximum width of the converged wiring; The width of the second portion is narrower than 30% of the maximum width; The first portion and the second portion have a total length; and A ratio of the length of the first portion to the total length is greater than or equal to 50%.

6. The circuit substrate according to claim 5, wherein: The ratio is greater than or equal to 70%.

7. The circuit substrate as claimed in claim 1, further comprising: An electrostatic protection component is electrically connected to the aggregation wiring.

8. The circuit substrate according to claim 1, wherein: The conductive structure further includes a bridge structure electrically connecting the first end of the aggregation wiring and the first conductive wiring, and electrically connecting the first end of the aggregation wiring and the second conductive wiring.

9. The circuit substrate according to claim 8, wherein: The bridge-shaped structure is located on a first layer of the circuit substrate; The first conductive wiring, the second conductive wiring, and the converged wiring are located on a second layer of the circuit substrate; and The first layer and the second layer have different distances relative to the substrate.

10. The circuit substrate as claimed in claim 1, further comprising: A plurality of welding pads are disposed on the peripheral area; The first conductive wiring is electrically connected to at least two of the pads.

11. The circuit substrate as claimed in claim 1, further comprising: an active component disposed on the active area; as well as a pixel electrode electrically connected to the active component; Wherein, the pixel electrode and the conductive structure overlap each other.

12. An electronic device, characterized in that: include: The circuit substrate as claimed in claim 1; a first circuit board, joined to the circuit substrate, for outputting the first signal to the first conductive wiring; as well as A second circuit board is connected to the circuit substrate and is used to output the second signal to the second conductive wiring.

13. The electronic device as claimed in claim 12, further comprising: a color filter; as well as A liquid crystal layer is arranged between the circuit substrate and the color filter. The electronic device as claimed in claim 12 , which is a display apparatus.

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