WO2010013530A1 - 表示パネル及びそれを備えた表示装置 - Google Patents
表示パネル及びそれを備えた表示装置 Download PDFInfo
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- WO2010013530A1 WO2010013530A1 PCT/JP2009/059331 JP2009059331W WO2010013530A1 WO 2010013530 A1 WO2010013530 A1 WO 2010013530A1 JP 2009059331 W JP2009059331 W JP 2009059331W WO 2010013530 A1 WO2010013530 A1 WO 2010013530A1
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- chip
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- display panel
- panel substrate
- substrate
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
Definitions
- the present invention relates to a display panel, and more particularly to a configuration of a display panel in which an IC (Integrated Circuit) chip is mounted on a panel substrate.
- the present invention also relates to a display device including such a display panel.
- a liquid crystal display panel As a form of display panel, a liquid crystal display panel has been widely used, and is incorporated in electronic equipment such as information equipment, TV equipment, and amusement equipment. Specific examples of electronic devices in which a liquid crystal display panel is incorporated include mobile phones, PDAs (Personal Digital Assistants), DVD players, mobile game devices, notebook PCs, PC monitors, TVs, and the like.
- PDAs Personal Digital Assistants
- DVD players Portable Game Players
- mobile game devices notebook PCs, PC monitors, TVs, and the like.
- FIG. 8 is a schematic plan view showing the configuration of a conventional liquid crystal display panel.
- FIG. 9 is a schematic cross-sectional view at the DD position in FIG.
- a conventional liquid crystal display panel 100 includes two panel substrates 101 and 102 made of glass. The two panel substrates 101 and 102 are bonded together with a frame-shaped seal 103 with a predetermined gap therebetween. Liquid crystal 104 is sealed in a space surrounded by the two panel substrates 101 and 102 and the seal 103. Note that a certain region at the substantially central portion of the liquid crystal display panel 100 is a display region 105 for performing liquid crystal display. The outside of the display area 105 is a non-display area 106 where no liquid crystal display is performed.
- the lower panel substrate (hereinafter sometimes referred to as “matrix substrate”) 101 has a switching element such as a TFT (Thin Film Transistor) on the surface and the switching element.
- a plurality of pixel electrodes (both not shown) connected to are arranged in a matrix.
- a plurality of scanning signal lines and data signal lines (both not shown) for driving the plurality of switching elements are formed so as to intersect each other.
- the upper panel substrate hereinafter also referred to as “counter substrate”) 102, layers of a counter electrode 107 and a color filter 108 are formed in order from the side close to the liquid crystal 104 as shown in FIG. Note that the matrix substrate 101 and the counter substrate 102 are arranged so that the pixel electrode and the counter electrode 102 face each other, whereby the display region 105 described above is formed.
- the matrix substrate 101 is formed to have a larger planar dimension than the counter substrate 102.
- a driving IC chip 109 having a circuit for driving the display area 105 is mounted on the portion of the matrix substrate 101 that protrudes from the counter substrate 102 by a COG (Chip On Glass) method.
- the driving IC chip 109 is an IC in which a driving circuit that generates a data signal (signal applied to the data signal line) and a scanning signal (signal applied to the scanning signal line) is integrated. Chip.
- the driving IC chip 109 When the driving IC chip 109 is mounted on the matrix substrate 101 by the COG method, it is generally mounted using an ACF (Anisotropic Conductive Film) 110.
- ACF Anaisotropic Conductive Film
- a technique for mounting an IC chip on a substrate using ACF has been conventionally known (see, for example, Patent Documents 1 to 3).
- the ACF 110 is placed in a predetermined area of the matrix substrate 101. Thereafter, the electrode pads 111 formed on the matrix substrate 101 and the bump electrodes 112 of the driving IC chip 109 are aligned, and thermocompression bonding is performed using the crimping tool 120. As a result, the driving IC chip 109 and the matrix substrate 101 are bonded.
- JP-A-7-99214 Japanese Patent Laid-Open No. 5-182997 JP 2002-134559 A
- the relationship between the ACF 110 and the driving IC chip 107 is as shown in FIG. That is, the planar size of the ACF 110 is larger than the planar size of the driving IC chip 109, and the ACF 110 is disposed in a state of protruding from all four side surfaces of the driving IC chip 109.
- the driving IC chip 109 is placed on the glass edge 101a (or one side of the two glass edges 101a and 101b (see FIG. 8) facing each other) of the matrix substrate 101 depending on the layout and the demand for downsizing the display panel. 101b) may be desired to be arranged.
- the ACF 110 protrudes from the driving IC chip 109 in the conventional configuration, the amount by which the driving IC chip 109 can be brought closer to the glass edge 101a is reduced accordingly.
- the ACF 110 may protrude from the glass edge 101a.
- alignment marks 113 for position adjustment used when the driving IC chip 109 is mounted are provided on the glass edges 101a and 101b side of the matrix substrate 101.
- the driving IC chip 109 is mounted near one glass edge 101a (or 101b)
- the ACF 110 and the alignment mark 113 are not overlapped, the driving IC chip 109 is sufficiently moved toward the glass edge 101a. I can't.
- an FPC (Flexible Print Circuit) 114 is generally connected to the matrix substrate 101.
- FPC Flexible Print Circuit
- the conventional configuration see FIG. 8; the configuration of the ACF 110 is larger than that of the driving IC chip 109
- the FPC 114 is connected to the matrix substrate 101. That is, for example, as shown in FIG. 11B, the ACF 115 for connecting the FPC 114 and the ACF 110 for mounting the driving IC chip 109 may overlap, and the connection of the FPC 114 may become insufficient (for example, easily peeled off).
- FIG. 11A is a view of the liquid crystal display panel as viewed from above.
- FIG. 11B is a partial view of the liquid crystal display panel from the side.
- FIG. 11A and 11B are diagrams for explaining the problems of the conventional liquid crystal display panel.
- FIG. 11A is a view of the liquid crystal display panel as viewed
- a display panel is a display panel in which a driving IC chip including a circuit for driving a display area for displaying an image is mounted on a panel substrate, and the driving IC chip A plurality of bump electrodes formed on a surface facing the panel substrate, a plurality of electrode pads formed on the panel substrate to be electrically connected to the plurality of bump electrodes, the panel substrate and the drive And an anisotropic conductive film that is interposed between the IC chip and electrically connects the bump electrode and the electrode pad.
- the said anisotropic conductive film is arrange
- This configuration is a configuration in which the anisotropic conductive film (ACF) is arranged so as to protrude from all other sides except one specific side of the driving IC chip.
- this configuration is a configuration in which the ACF does not protrude from one side surface of the driving IC chip, and this can be used to cope with, for example, downsizing of the display panel.
- an IC chip can be mounted as close to the end face of the panel substrate as possible.
- the driving IC chip is disposed so as to be biased to one of two opposing end surfaces of the panel substrate, and the specific one side surface is Of the plurality of side surfaces of the driving IC chip, the driving IC chip may be a side surface that is biased.
- the driving IC chip can be arranged at a position just near the end face of the panel substrate.
- an alignment mark for adjusting the position of the driving IC chip may be provided in the vicinity of the two end faces of the panel substrate. In this configuration, it is possible to bring the driving IC chip as close to the alignment mark as possible.
- the position of the driving IC chip can be as close to the end face as possible without impairing the function of the alignment mark. Since the driving IC chip can be mounted while using the alignment mark, the workability can be prevented from being lowered when the driving IC chip is positioned as close to the end face as possible.
- the panel substrate is provided with a connection portion for connecting the flexible printed circuit board adjacent to the position where the driving IC chip is mounted.
- the specific one side surface may be a side surface adjacent to the connection portion among a plurality of side surfaces of the driving IC chip.
- the display panel having the above structure includes a pair of glass substrates opposed to each other and a liquid crystal sandwiched between the pair of glass substrates, and one of the pair of glass substrates is larger than the other.
- the panel substrate may be a larger one of the pair of glass substrates. According to this, the above object can be achieved in the liquid crystal display panel.
- the driving IC chip is provided in a substantially quadrangular prism shape, and the anisotropic conductive film is disposed so as to protrude from three side surfaces excluding the specific one side surface. Also good. In this configuration, it is preferable that fillets of the anisotropic conductive film are formed on the three side surfaces. Thereby, sufficient mounting strength of the driving IC chip can be ensured.
- the mounting accuracy of the driving IC chip on the panel substrate in a direction orthogonal to the specific one side surface is ⁇ amm, and the accuracy of attaching the anisotropic conductive film to the panel substrate is increased.
- ⁇ bmm it is preferable that the distance dmm from the specific one side surface to the bump electrode disposed closest to the specific one side surface satisfies the following formula (1). d ⁇ 2 (a + b) (1)
- the ACF does not always protrude from one specific side surface of the driving IC chip, and the bump electrode can be covered with the ACF. That is, according to the present configuration, the probability that a defective product is generated can be kept low when manufacturing the display panel.
- the present invention provides a display device comprising a display panel and a backlight device attached to the back side of the display panel, wherein the display panel having the above-described configuration is used. It is characterized by.
- the display panel can be reduced in size
- the display device can also be reduced in size.
- the driving IC chip mounted on the display panel can be appropriately arranged, for example, close to the end surface of the panel substrate for the sake of layout, and the display device can be easily designed.
- the present invention it is possible to provide a display panel in which an IC chip is mounted on a panel substrate and can easily cope with downsizing.
- by providing the display panel it is possible to provide a display device that can be easily miniaturized.
- FIG. 2 is a schematic cross-sectional view showing the configuration of the liquid crystal display panel of the first embodiment, and is a cross-sectional view at the position AA in FIG.
- FIG. 2 is a schematic cross-sectional view showing the configuration of the liquid crystal display panel of the first embodiment, and is a cross-sectional view taken along the line BB in FIG.
- Schematic plan view showing the configuration of a driving IC chip mounted on the liquid crystal display panel of the first embodiment The schematic plan view which shows the structure of the liquid crystal display panel of 2nd Embodiment.
- FIG. 6 is a schematic cross-sectional view showing a configuration of a liquid crystal display panel according to a second embodiment, and is a cross-sectional view taken along the line CC in FIG.
- FIG. 9 is a schematic cross-sectional view showing a configuration of a conventional liquid crystal display panel, and is a cross-sectional view at a DD position in FIG.
- Diagram for explaining the procedure for mounting the driving IC chip on the matrix substrate by the COG method This is a diagram for explaining the problems of a conventional liquid crystal display panel, and is a view of the liquid crystal display panel from above. This is a diagram for explaining the problems of a conventional liquid crystal display panel, and shows a part of the liquid crystal display panel as seen from the side.
- FIG. 1 is a schematic plan view showing the configuration of the liquid crystal display panel of the first embodiment.
- 2A and 2B are schematic cross-sectional views of the liquid crystal display panel of the first embodiment.
- FIG. 2A is a cross-sectional view at the position AA in FIG. 1
- FIG. 2B is a cross-sectional view at the position BB in FIG. .
- FIG. 3 is a schematic plan view showing the configuration of a driving IC chip mounted on the liquid crystal display panel of the first embodiment.
- FIG. 3 is a view of the driving IC chip as viewed from the lower surface side (side on which the bump electrodes are provided).
- the liquid crystal display panel 1 of the first embodiment includes a first panel substrate 11, a second panel substrate 12, a liquid crystal 16, and a driving IC chip 21.
- a constant region at a substantially central portion of the liquid crystal display panel 1 is a display region 41 for performing liquid crystal display (image display). Is a non-display area 42 where no liquid crystal display is performed.
- the first panel substrate 11 and the second panel substrate 12 are both made of glass.
- the first panel substrate 11 and the second panel substrate 12 are arranged so that their main surfaces (widest surfaces) face each other, and are bonded together with a predetermined gap above and below by a frame-shaped seal 13. Yes.
- the first panel substrate 11 and the second panel substrate 12 are both substantially rectangular in plan view, but the first panel substrate 11 is larger than the second panel substrate 12. Specifically, referring to FIG. 1, the size in the left-right direction is substantially the same, but the size of the first panel substrate 11 is larger with respect to the size in the vertical direction, and the lower side of the first panel substrate 11 is The second panel substrate 12 protrudes.
- the first panel substrate 11 On the surface of the first panel substrate 11, a plurality of switching elements such as TFTs (Thin Film Transistors) and pixel electrodes to which the switching elements are connected (both not shown) are arranged in a matrix. A plurality of scanning signal lines and data signal lines (both not shown) for driving the plurality of switching elements are formed so as to intersect each other. Further, the first panel substrate 11 includes an output wiring 25 connected to the scanning signal line or the data signal line, an input wiring 26 for inputting a signal from the outside, and an electrode pad 27 (all of which are shown in FIG. 2A). A plurality are provided. In FIG. 1, the wiring pattern is omitted.
- TFTs Thin Film Transistors
- the counter electrode 14 and the color filter 15 are formed on the second panel substrate 12 (see FIG. 2A).
- the liquid crystal 16 is sealed in a space surrounded by the first panel substrate 11, the second panel substrate 12, and the frame-shaped seal 13.
- the liquid crystal 16 changes its optical properties (light transmittance) by applying a voltage.
- the display area 41 see FIG. 1 is formed.
- the driving IC chip 21 is an IC chip including a circuit for driving the display area 41.
- the driving IC chip 21 is an IC chip in which driving circuits for generating data signals and scanning signals are integrated together.
- the driving IC chip 21 includes a driving circuit that generates a data signal and a scanning signal.
- a driving circuit that generates a scanning signal may be monolithically provided on the first panel substrate 11, and the driving IC chip 21 may of course have only a circuit that generates a data signal.
- the driving IC chip 21 is mounted on the portion where the first panel substrate 11 protrudes from the second panel substrate 12 by the COG method.
- the driving IC chip 21 includes the left glass edge 11 a side of the two glass edges (two end surfaces) 11 a and 11 b facing the first panel substrate 11. It is arranged to be biased.
- an anisotropic conductive film (ACF) 31 is used. That is, the ACF 31 is interposed between the driving IC chip 21 and the first panel substrate 11, whereby the driving IC chip 21 and the first panel substrate 11 are bonded. Further, the bump electrode 22 (plural) provided on the driving IC chip 21 and the electrode pad 27 (plural) provided on the first panel substrate 11 are electrically connected by the ACF 31. .
- the procedure for mounting the driving IC chip 21 on the first panel substrate 11 is as follows.
- the ACF 31 is placed in a predetermined area of the first panel substrate 11. Thereafter, the electrode pads 27 formed on the first panel substrate 11 and the bump electrodes 22 of the driving IC chip 21 are aligned, and the driving IC chip 21 is thermocompression bonded to the first panel substrate 11.
- the driving IC chip 21 of the present embodiment is provided in a substantially quadrangular prism shape (more specifically, a substantially rectangular parallelepiped shape).
- the driving IC chip 21 is placed on the first panel substrate 11 so that only the side surface 21a closer to the glass edge 11a protrudes from the ACF 31. It is mounted on.
- the ACF 31 is disposed so as to protrude from the three side surfaces 21 b to 21 d except the side surface 21 a of the driving IC chip 21.
- the four side surfaces 21a to 21d correspond to surfaces substantially orthogonal to the surface 21e on which the bump electrode 22 of the driving IC chip 21 is formed.
- the side surface 21a corresponds to an embodiment of one specific side surface in the present invention.
- the fillets 32 of the ACF 31 are formed on the three side surfaces 21b to 21d existing on the ACF 31. Accordingly, the driving IC chip 21 is mounted on the first panel substrate 11 with the fillets 32 formed on the three side surfaces 21b to 21d among the four side surfaces 21a to 21d. Therefore, the mounting strength of the driving IC chip 21 is sufficiently secured.
- the bump electrodes formed on the driving IC chip 21 are inconvenient unless they are separated from the side surface 21a as shown in FIG. This is to ensure electrical connection with the electrode pads 27 by using the ACF 31 for all the bump electrodes 22 provided on the driving IC chip 21.
- the other three side surfaces 21b to 21d are configured such that the ACF 31 protrudes from these side surfaces, and therefore the bump electrode 22 may or may not be separated from these side surfaces.
- liquid crystal display panel 1 of the present embodiment will be described below as to how far the bump electrode 22 should be separated from the side surface 21a of the driving IC chip 21.
- the driving IC chip 21 is as close as possible to the glass edge 11a side. Therefore, in the present embodiment, the ACF 31 does not protrude from the side surface 21a of the driving IC chip 21. Therefore, the mounting position can be determined based on the side surface 21a of the driving IC chip 21.
- an alignment mark 43 used for position adjustment when the driving IC chip 21 is mounted is provided near the two glass edges 11 a and 11 b of the first panel substrate 11. Therefore, under the premise that the driving IC chip 21 is as close as possible to the glass edge 11a side, in this embodiment, the side surface of the driving IC chip 21 is not covered with the driving IC chip 21. 21a is arranged to approach the alignment mark 43. Although there is a slight misalignment when the driving IC chip 21 is mounted on the first panel substrate 11, the mounting accuracy is quite good.
- the mounting accuracy in the direction orthogonal to the side surface 21a of the driving IC chip 21 is, for example, about ⁇ 0.01 mm, although it varies depending on the device used. In the following description, it is assumed that the mounting accuracy in the direction orthogonal to the side surface 21a of the driving IC chip 21 is ⁇ amm.
- the ACF 31 tends to have poor adhesion accuracy particularly in the direction orthogonal to the side surface 21a. Although it differs depending on the apparatus used, the pasting accuracy is, for example, about ⁇ 0.5 mm. Hereinafter, description will be made assuming that the pasting accuracy in the direction orthogonal to the side surface 21a of the ACF 31 is ⁇ bmm.
- the target attaching position of the ACF 31 is as follows. That is, the end of the ACF 31 on the glass edge 11a side is away from the glass edge 11a (the direction toward the glass edge 11b) with respect to the position of the side surface 21a of the driving IC chip 21 where the mounting position is determined (a + b). ) It needs to be pasted so that the position is shifted by mm or more.
- the ACF 31 must be present below the bump electrode 22 of the driving IC chip 21 while satisfying the above conditions. For this purpose, even if the ACF 31 attachment position is most shifted to the glass edge 11b side and the driving IC chip 21 is most shifted to the glass edge 11a side in consideration of the target attachment position of the ACF 31, It is necessary to determine the position so that the bump electrode 22 does not protrude from the ACF 31. That is, when the distance from the side surface 21a to the bump electrode 22 disposed closest to the side surface 21a is d, d needs to satisfy the following formula (1). d ⁇ 2 (a + b) (1)
- d there is an upper limit to the size of d. This is determined by the size of the driving IC chip 21 and the interval at which the bump electrodes 22 can be formed.
- the liquid crystal display panel 1 of the first embodiment since the ACF 31 does not always protrude from the side surface 21a of the driving IC chip 21, it is arranged close to the alignment mark 43. It is possible. Conventionally, there has been a problem that when the driving IC chip 21 is brought close to the alignment mark 21, the ACF 31 overlaps the alignment mark 43, and the alignment mark 43 does not function. For this reason, the liquid crystal display panel of this embodiment has good assembly workability. In the case where the alignment mark is not provided, the driving IC chip 21 can be mounted close to the glass edge 11a (or 11b). Therefore, it is possible to mount electronic components and the like on the first panel substrate 11 with high density (that is, downsizing is possible).
- the driving IC chip 21 mounted on the first panel substrate 11 has the mounting strength of the ACF 31 because the fillet 32 of the ACF 31 is formed on the three side surfaces 21b to 21d except the side surface 21a. High reliability.
- FIG. 4 is a schematic plan view showing the configuration of the liquid crystal display panel of the second embodiment.
- FIG. 5 is a schematic cross-sectional view showing the configuration of the liquid crystal display panel of the second embodiment, and is a cross-sectional view taken along the line CC in FIG.
- FIG. 6 is a schematic plan view showing a configuration of a driving IC chip mounted on the liquid crystal display panel of the second embodiment.
- the configuration in which the driving IC chip 21 is mounted on the first panel substrate 11 and the size of L shown in FIG. 4 are smaller than those in the first embodiment.
- the liquid crystal display panel 1 is the same as that of the first embodiment except for the above. For this reason, the same code
- the driving IC chip 21 including a circuit for driving the display area 41 is mounted on the portion where the first panel substrate 11 protrudes from the second panel substrate 12 by the COG method. Is done. However, the mounting position of the driving IC chip 21 is not located near any one of the glass edges 11a and 11b, but is disposed substantially at the center.
- the liquid crystal display panel 2 of the second embodiment is a display panel that meets the demand for a narrow frame, and L shown in FIG. 4 is very narrow. For this reason, the distance between the connecting portion 52 for connecting the FPC 51 for sending a signal to the driving IC chip 21 and the like and the driving IC chip 21 is also very narrow.
- a method of attaching the ACF 31 used for mounting the driving IC chip 21 is devised. That is, the ACF 31 is disposed so as to protrude from the three side surfaces 21a, 21b, and 21d excluding the side surface 21c.
- the driving IC chip 21 is placed on the first panel substrate 11 so that only the side surface 21c adjacent to the connection portion 52 of the four side surfaces 21a to 21d of the driving IC chip 21 protrudes from the ACF 31. It is installed.
- the ACF for connecting the FPC 51 is mounted with the driving IC chip 21 when the FPC 51 is connected.
- the problem of overlapping with the ACF 31 does not occur. For this reason, it can be said that the configuration of the present embodiment is advantageous for narrowing the frame.
- the bump electrode 22 formed on the driving IC chip 21 is not separated from the side surface 21c. This is to ensure electrical connection with the electrode pads 27 by using the ACF 31 for all the bump electrodes 22 provided on the driving IC chip 21. Also in this case, the condition that the distance d from the side surface 21c to the bump electrode 22 disposed closest to the side surface 21c is satisfied is given by the following expression (1), as in the case of the first embodiment.
- the mounting accuracy in the direction orthogonal to the side surface 21c of the driving IC chip 21 is ⁇ amm
- the attaching accuracy in the direction orthogonal to the side surface 21c of the ACF 31 is ⁇ bmm.
- the pasting accuracy in the direction orthogonal to the side surface 21c of the ACF 31 is better than the pasting accuracy in the direction orthogonal to the side surface 21a, and the value of d can be made smaller than in the case of the first embodiment.
- the drive IC chip 21 mounted on the first panel substrate 11 has the ACF 31 fillet 32 formed on the three side surfaces 21a, 21b, and 21d. Since it is mounted in a state, the reliability of mounting strength is high.
- FIG. 7 is a schematic cross-sectional view of a display device including the liquid crystal display panel of the present embodiment.
- the display device 3 generally includes a liquid crystal display panel 1 (2), a backlight device 6, and a bezel 7.
- the configuration of the liquid crystal display panel 1 (2) is as described above, and a polarizing plate 18 and a polarizing plate 17 are attached to the upper and lower surfaces of the liquid crystal display panel 1 (2), respectively.
- the backlight device 6 includes a lower chassis 61, a light guide plate 62, a reflection sheet 63, an optical sheet 64, an upper chassis 65, and a light emitting diode (LED: Light Emitting Diode) 66.
- LED Light Emitting Diode
- the lower chassis 61 is formed in a box shape, and the light guide plate 62, the reflection sheet 63, and the optical sheet 64 are accommodated in the lower chassis 31. Further, the lower chassis 61 is formed of a material having good thermal conductivity (for example, metal), and easily dissipates heat generated by the LED 66 attached to the side surface portion 61a. That is, the lower chassis 61 in the present embodiment also has a function as a heat sink.
- the light guide plate 62 is formed of, for example, acrylic resin and is provided in a substantially rectangular parallelepiped shape.
- a reflection sheet 63 is provided on the lower surface 62 c side of the light guide plate 62 so that a part of the light traveling through the light guide plate 62 can be reflected.
- the light incident from the side surface portion 62a of the light guide plate 62 is emitted in a planar shape from the upper surface 62b.
- three optical sheets 64 are arranged on the upper surface 62 b side of the light guide plate 62.
- the optical sheet 64 is provided in order to make light emitted from the light guide plate 62, for example, uniform and non-uniform light, and the number thereof is not limited to the configuration of the present embodiment.
- the upper chassis 65 is formed of resin, for example, and is placed on the lower chassis 61.
- the light guide plate 62, the reflection sheet 63, and the optical sheet 64 are sandwiched between the upper chassis 65 and the lower chassis 61.
- the upper chassis 65 is formed with an opening through which light emitted from the light guide plate 62 passes, and the upper chassis 65 is a frame-like frame.
- a step 65a is formed at the periphery of the opening of the upper chassis 65 so that the periphery of the liquid crystal display panel 1 (2) can be placed thereon.
- a plurality of LEDs 66 are arranged in the vicinity of the side surface 62 a of the light guide plate 62.
- the plurality of LEDs 66 are arranged in a row at predetermined intervals in a direction perpendicular to the paper surface of FIG. More specifically, the plurality of LEDs 66 are mounted on the FPC 51, and the FPC 51 is attached to the side surface portion 61 a of the lower chassis 61 so as to be disposed near the side surface 62 a of the light guide plate 62.
- the FPC 51 and the side surface portion 61a of the lower chassis 61 are bonded by, for example, a double-sided adhesive.
- the bezel 7 is placed on the step portion 65a of the upper chassis 65 of the backlight device 6 from above the liquid crystal display panel 1 (2) on which the peripheral portion is placed, and the liquid crystal display panel 1 (2) and the backlight device. 6 is fixed.
- the display device 3 of the present embodiment is configured as described above, the liquid crystal display panel 1 (2) can be downsized, and the display device 3 can be easily downsized.
- the present invention is not limited to this, and the present invention can also be applied to a display panel on which a plurality of driving IC chips are mounted.
- the ACF does not protrude from the four side surfaces of the driving IC chip that are close to the driving IC chip arranged in parallel, and the remaining three One side may be configured such that the ACF protrudes. According to this, the interval between the two driving IC chips can be reduced, which is advantageous for high-density mounting.
- the present invention only the lower side of the first panel substrate 11 protrudes from the second panel substrate.
- the scope to which the present invention can be applied is not limited to this.
- the present invention can also be applied to a case in which the protruding part has a configuration in which one of the left and right sides is added in addition to the lower side, and the driving IC chip is mounted at this position.
- the display panel is a liquid crystal display panel, but the present invention is not limited to this. That is, the present invention can also be applied to a display panel and a display device that use an electro-optic material other than liquid crystal as an optical switch material.
- the display panel on which the IC chip is mounted on the panel substrate can easily cope with downsizing. Further, according to the present invention, it is easy to mount an IC chip near the end surface of the panel substrate. That is, the present invention is useful as a display panel invention.
Abstract
Description
d≧2(a+b)(1)
まず、第1実施形態の液晶表示パネルについて図1~図3を参照しながら説明する。図1は、第1実施形態の液晶表示パネルの構成を示す概略平面図である。図2A及び図2Bは、第1実施形態の液晶表示パネルの概略断面図で、図2Aは図1のA-A位置における断面図、図2Bは図1のB-B位置における断面図である。図3は、第1実施形態の液晶表示パネルに搭載される駆動用ICチップの構成を示す概略平面図である。なお、図3は、駆動用ICチップを下面側(バンプ電極が設けられる側)から見た図である。
d≧2(a+b) (1)
次に、第2実施形態の液晶表示パネルについて、図4~図6を参照しながら説明する。図4は、第2実施形態の液晶表示パネルの構成を示す概略平面図である。図5は、第2実施形態の液晶表示パネルの構成を示す概略断面図で、図4のC-C位置における断面図である。図6は、第2実施形態の液晶表示パネルに搭載される駆動用ICチップの構成を示す概略平面図である。
d≧2(a+b) (1)
ただし、本実施形態では、駆動用ICチップ21の側面21cに直交する方向における搭載精度が±ammであるとし、ACF31の側面21cに直交する方向における貼り付け精度が±bmmであるとしている。
次に、第1実施形態の液晶表示パネル1又は第2実施形態の液晶表示パネル2を備える表示装置の実施形態について図7を参照しながら説明する。なお、図7は、本実施形態の液晶表示パネルを備える表示装置の概略断面図である。
本発明は、以上に示した実施形態に限定される趣旨ではない。本発明の目的を逸脱しない範囲で種々の変更が可能である。
3 表示装置
6 バックライト装置
11 第1パネル基板
11a、11b ガラスエッジ(パネル基板の端面)
12 第2パネル基板
16 液晶
21 駆動用ICチップ
21a~21d 駆動用ICチップの側面
21e バンプ電極が形成される面
22 バンプ電極
27 電極パッド
31 ACF(異方性導電膜)
32 フィレット
41 表示領域
51 FPC(フレキシブルプリント基板)
52 接続部
Claims (9)
- 画像を表示する表示領域を駆動するための回路を備える駆動用ICチップがパネル基板に搭載される表示パネルであって、
前記駆動用ICチップの前記パネル基板と対向する面に形成される複数のバンプ電極と、
前記複数のバンプ電極と電気的に接続するために前記パネル基板に形成される複数の電極パッドと、
前記パネル基板と前記駆動用ICチップとの間に介在し、前記バンプ電極と前記電極パッドとを電気的に接続する異方性導電膜と、を備え、
前記異方性導電膜が、前記駆動用ICチップの特定の1つの側面を除く他の全ての側面からはみ出るように配置されている表示パネル。 - 請求項1に記載の表示パネルであって、
前記駆動用ICチップは、前記パネル基板の対向する2つの端面のうちのいずれか一方に偏って配置され、
前記特定の1つの側面は、前記駆動用ICチップが有する複数の側面のうち、前記駆動用ICチップが偏って配置される側の側面である。 - 請求項2に記載の表示パネルであって、
前記パネル基板の前記2つの端面近傍には、前記駆動用ICチップの位置調整を行うためのアライメントマークが設けられている。 - 請求項1に記載の表示パネルであって、
前記パネル基板には、前記駆動用ICチップが搭載される位置に隣接して、フレキブルプリント基板を接続するための接続部が設けられており、
前記特定の1つの側面は、前記駆動用ICチップが有する複数の側面のうち、前記接続部に隣接する側面である。 - 請求項1に記載の表示パネルであって、
対向配置される一対のガラス基板と、
前記一対のガラス基板に挟持される液晶と、を備え、
前記一対のガラス基板は、一方が他方に比べて大きくなっており、
前記パネル基板は、前記一対のガラス基板のうち大きい方のガラス基板である。 - 請求項1から5のいずれかに記載の表示パネルであって、
前記駆動用ICチップは略四角柱状に設けられ、
前記異方性導電膜は、前記特定の1つの側面を除く3つの側面からはみ出るように配置される。 - 請求項6に記載の表示パネルであって、
前記3つの側面には、前記異方性導電膜のフィレットが形成されている。 - 請求項6に記載の表示パネルであって、
前記特定の1つの側面と直交する方向における前記駆動用ICチップの前記パネル基板への搭載精度を±amm、前記異方性導電膜の前記パネル基板への貼り付け精度を±bmmとした場合に、
前記特定の1つの側面から前記特定の1つの側面の最も近くに配置される前記バンプ電極までの距離dmmが、以下の式(1)を満たす。
d≧2(a+b) (1) - 表示パネルと、
前記表示パネルの背面側に取り付けられるバックライト装置と、
を備える表示装置であって、
前記表示パネルとして請求項1から5のいずれかに記載のものを用いる表示装置。
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US13/003,790 US8421979B2 (en) | 2008-07-28 | 2009-05-21 | Display panel and display device including the same |
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JP5008767B2 (ja) * | 2008-09-29 | 2012-08-22 | シャープ株式会社 | 基板モジュールおよびその製造方法 |
KR101741821B1 (ko) * | 2011-06-09 | 2017-06-15 | 엘지디스플레이 주식회사 | 액정표시장치 |
CN102799003B (zh) * | 2012-08-27 | 2015-11-25 | 深圳市华星光电技术有限公司 | 液晶显示设备 |
CN102866517A (zh) * | 2012-08-29 | 2013-01-09 | 昆山维信诺显示技术有限公司 | 一种acf贴附方法 |
KR102107149B1 (ko) * | 2013-04-19 | 2020-05-29 | 삼성디스플레이 주식회사 | Cof 패키지 및 이를 포함하는 표시 장치 |
CN103247233B (zh) * | 2013-04-28 | 2015-09-23 | 京东方科技集团股份有限公司 | 柔性基板、显示装置及在柔性基板上贴附电子器件的方法 |
CN105259720B (zh) | 2015-10-23 | 2018-11-27 | 深超光电(深圳)有限公司 | 阵列基板以及使用该阵列基板的显示面板 |
CN106297561A (zh) * | 2016-09-09 | 2017-01-04 | 广东欧珀移动通信有限公司 | 显示屏结构及移动终端设备 |
US11224131B2 (en) * | 2018-04-04 | 2022-01-11 | Lenovo (Singapore) Pte. Ltd. | Systems and methods for surface mounting cable connections |
CN113126378A (zh) * | 2021-04-16 | 2021-07-16 | 合肥京东方光电科技有限公司 | 液晶显示模组和显示装置 |
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