TW567367B - Display device - Google Patents

Abstract

A display device is disclosed, which comprises a liquid crystal panel, a flexible printed circuit board, a driving IC device, a conductive adhesive and passive devices such as resistive capacitors, etc. the liquid crystal display panel has a panel electrode, the flexible printed circuit board is fixed onto the right back end of the liquid crystal panel, the flexible printed circuit board has plural external leads on its exterior, and has plural internal leads inside. The conductive adhesive is bonded to the position between the panel electrode of the liquid crystal panel and the external leads outside the printed circuit board, and is also bonded to the position between the internal leads inside the printed circuit board and the driving IC device. Thus, the display is not only light, thin, short, small but also can prevent the generation of crosstalk.

Description

567367 V. Description of the invention (1) Field of the invention: The present invention relates to a liquid crystal display package circuit structure of a display device, especially using the world's latest electronic assembly technology-grain soft film bonding technology (COF) to simplify the whole. Display device for process technology. Background of the Invention: According to the numerous patent documents concerning display devices in various countries in the world, such as "FALT DISPLAY PA NEL WITH FRAMING FOR FLEXIBLE SUBSTRATE FOLDING" in US Patent Document No. 486215 3, the important technical records are as follows: The flexible circuit substrate (including LSI) is connected to the PCB board from the upper and lower glass of the LCD through an S-type flexure; "LIQUID CRYSTAL MODULE WITH TAB ASSEMB LIES CONNECTED THROUGH A FLEXIBLE CIRCUIT BOARD" by US Patent Document No. 534 1 233

The important technical records are as follows: Each TAB-LSI is below the LCD and connects the I / 0 terminal of the upper and lower glass to a flexible printed circuit board; "LIQUID CRYSTAL DISPLAY WITH CHIP PR0J ECTING" of US Patent Document No. 46 5 5 5 5 1 "ABOVE AND BELOW FLEXIBLE FILM", each flexible circuit film (including LSI) is below the LCD, and the glass I / O terminals are connected to the PCB; Japanese Patent Document No. 0 32 0 46 1 9A2 "LIQUID CRYSTAL DISPLAY DEVICE", which The important technical records are as follows: Each COF connects the I / O terminals of the upper and lower glass of the LCD in parallel to the PCB; Japanese Patent Document No. 0 2 1 3 782 2A2 "LIQUID CRYSTAL DISPLAY DEVICE" Each COF connects the I / O of the upper and lower glass of the LCD in parallel O terminal to PCB; Japanese Patent Document No. 0 42 1 8 9 3 3A2 "FLEXIBLE CIRCUIT BOARD AND LIQ UID CRYSTAL DISPLAY DEVICE", each COF of which is connected to the LCD in parallel

567367 V. Description of the invention (2) I / O terminals of the upper and lower glass to the PCB. In addition, it is known as a "display device" such as Taiwan Republic of China Patent Gazette No. 3 9 2 1 39, which is a terminal part of a display element formed by a transparent substrate and a liquid crystal sandwiched therebetween and a terminal part of a membrane plate. It is characterized in that the film plate is located inside the display element, and the terminal portion of the film plate 'is a folded back spacer and then connected to the terminal of the display element; wherein, The terminals of the display element are provided on a plurality of adjacent sides of one of the transparent substrates, and the terminal portion of the film plate is connected to the plurality of sides; wherein another I / is formed by making all grooves in the film plate F terminal. It has the following disadvantages: for example, the diaphragm is folded back with a spacer and then connected to the terminal of the display element. The production of this spacer or the folding back with a spacer can easily increase costs and increase the complexity of manufacturing. It also needs to be improved. In addition, the complex overall structure is prone to increase in volume and weight, which is not conducive to future lightweight, thin, short and miniaturized portable communication electronic products, which urgently needs to be improved. As shown in the first figure, the shortcomings of the existing LCM assembly technology are roughly as follows: 1. Surface adhesion technology (SMT), which has the disadvantage of not being able to meet the requirements of narrow pitches' and the minimum board thickness of PCB is about 0.4 mm. Slightly bulky overall. 2. Tape and Reel Bonding Technology (TAB) ... When applied to narrow pitch bonding, the thermal expansion characteristics of TAB tape must be taken into account, and the signal output / input end direction is fixed. Passive components must be attached to other substrates and have poor flexibility. 3. Grain-glass bonding technology (COG): Passive components must be attached separately

Page 5 ψ61361 V. Description of the invention (3) On other substrates, the attenuation of the indium tin oxide electrode that is often scanned or displayed causes signal attenuation or crosstalk. 4. Die-flexible film bonding technology (C0F) · • Use COG technology to flip the bare die, so that the IC is combined with the flexible circuit board, and the passive components can be directly mounted on the flexible circuit board. This technology can also be designed according to product requirements. Signal output, input end position, and extremely flexible, thickness is about 1/8 of pc B, 1/3 of TAB. In terms of the COF LCM structure technology, the scanning electrodes and display electrodes of a generally small-sized liquid crystal display are on the same side of the same glass as the panel. This virtually increases the trace length of the scanning (or display) electrode, which increases its length. The impedance causes the CrosstaU phenomenon. For medium and large-sized LCDs, the scanning electrodes and display electrodes are placed on the panel and the lower glass, but the module structure is imitation. The electrodes on the panel are connected to the number 彳 r I? _. People + ^ ^ C0F, and these C0F signal input terminals are then connected to the circuit board, which adds a lot of process program research, and has experienced countless shortcomings of Dai Temple's, after continually thinking about the main purpose of the present invention, there is finally this creation. produce. The device system includes-a liquid crystal film plate j :;-a display device [the display circuit element,-conductive adhesive and-; = H circuit board,-drive integrated board is provided with panel electrodes, the y: electric valley and other passive A flexible printed circuit is mounted on the liquid crystal surface of the component i, and the driving circuit of the second earth system is provided with a complex surface supporting pin, so that the integrated circuit and passive components can be attached to the material process after contamination of the integrated circuit and passive components. When the manufacturing process, personnel costs, and the use of TCP-free methods can be reduced, the defective rate in the assembly process is reduced, and the capacity of the Solder terminal during the manufacturing process can be avoided.

Page 6 567367 V. Description of the invention (4) Fracture that is easy to break The re-device of the present invention includes a liquid circuit element, a lead printed circuit board, a plurality of external circuits, and a plurality of internal flexible circuits. The thickness is ten years better, so the panel can be used to shrink electronic products. The other device of the present invention includes a liquid circuit element and a guiding fruit. The purpose is to provide a crystal adhesive for the display panel of the display device and an internal thin film fixed on the outside of the branch, which can drive a small product, and a flexible resistor. The LCD surface pins can be connected with the liquid pins, and the appearance area of the product's circuit elements can be reduced. The printed capacitors and other components are driven by the panel ’s orthocrystalline panel, and the weight and parts are more suitable for the circuit board and a moving element. The circuit element is reduced in size and the moving element is turned on and applied to the display driving integrated circuit, in which the soft circuit board is pole-bonded, piece-bonded, and can be folded to the liquid crystal portable communication. The purpose is to provide a circuit element on the movable integrated circuit. By using the lead, the pin and the cost of flexible printing can be made at one time and the material is made. The secondary breaking system of the present invention includes a liquid circuit element, and a conductive adhesive can be used between the anisotropic conductive brush circuit board and the crystal panel. Glue and Glue with one of the objectives of the OLED panel and the OLED driving brush circuit, and the OLED panel, OLED, OLED, OLED, OLED, OLED, etc. Engaging pollution. The bumps can be printed with bumps such as a soft-resistor, a gel-based integrated printed capacitor, and the like, so that a printed capacitor and the like are connected to the display device of the circuit element, the display circuit board, and a driver. Integrated passive 7L pieces; among them, the driving pin 'makes the internal bow of the driving integrated circuit board 丨 all the signals connected to the feet turn in / can reduce the process procedure, two kinds of display devices, the display circuit board, one drive Components; wherein the conductive liquid crystal panel and the flexible printed circuit board

"67367 V. Description of the invention (5), the display device can be made more easily and conveniently. A second object of the present invention is to provide a display device. The display device includes a liquid crystal panel, a flexible printed circuit board, a driving integrated circuit element, a conductive adhesive, and a passive element such as a resistor and capacitor. The passive element The surface-adhesive type is arranged on the flexible printed circuit board, so that the display device can be applied to a general-sized portable liquid crystal display structure, so that the product can be lighter, thinner, smarter and smaller. In order to make your reviewing committee understand the purpose, features and effects of the present invention, the following specific examples are given in conjunction with the accompanying drawings to explain the present invention in detail, as follows: As shown in the second to sixth figures As shown, it is a back view, a side view of a three-dimensional structure of a first embodiment of the present invention, and a side view of a plane structure of a second embodiment. The present invention is to provide a display device, which includes a liquid crystal panel 1, a flexible printed circuit board 2, a driving integrated circuit element 3, a conductive adhesive 4 and a passive element 5. The liquid crystal panel 1 is provided with upper glass panels 11 and 12 and an upper end thereof is provided with a plurality of pin panel electrodes 1 3. The upper glass panel 11 is provided with an upper polarizer 14 and the lower glass. A lower polarizer 15 is provided on the panel 12 (as shown in the second and third figures). The flexible printed circuit board 2 is fixed on the front and rear ends of the liquid crystal panel 1. The lower or upper end of the flexible printed circuit board 2 can be equipped with a plurality of driving integrated circuit elements 3 and passive elements 5. The flexible printed circuit board 2 is provided with a plurality of branches outside. The outer pin 2 1 can be connected to the panel electrode 1 3 of the liquid crystal panel 1, and a plurality of inner pins 2 2 can be connected to the driving integrated circuit element 3 inside, and the soft

Page 8 567367 V. Description of the Invention (6) One side of the printed circuit board 2 is provided with at least one signal input terminal 2 3. The driver integrated circuit element 3 can be controlled by connecting a processor, and one side of the printed circuit board 2 is plural. The outer pin 2 1 (OLB) and the panel electrode 1 3 of the liquid crystal panel 1 (LCD) can be folded at an R angle of 180 ° after being joined, and the other side is before the LCD panel 1 is not joined. That is, it is folded to 180 degrees and fixed (as shown in the fourth, fifth and sixth figures). The driving integrated circuit element 3 is provided with a plurality of metal bump pins 3 2, so that the driving integrated circuit element 3 uses the conductive adhesive 4 to join the inner pins 2 2 inside the flexible printed circuit board 2 (such as (Fourth, fifth and sixth). The conductive adhesive 4 may be an anisotropic conductive adhesive 4 1, which is glued to the panel electrodes 1 3 of the glass panel 1 1, 12 of the liquid crystal panel 1 and the pins 2 1 outside the flexible printed circuit board 2. Between the driving integrated circuit element 3 and the flexible printed circuit board 2. The passive component 5 is disposed on the flexible printed circuit board 2 for use in a driving circuit. In this way, the display device can be applied to the structure of a general small-sized portable liquid crystal display, so that the product is not only light, thin, compact, and small, but also can prevent and reduce the occurrence of crosstalk. The invention has many advantages, which are described as follows: 1. Simple structure, good flexibility, favorable assembly and narrowing, which is very convenient and safe. 2. Using the world's most advanced die-soft film bonding technology (C0F), very healthy and natural.

Page 9 567367 V. Description of the invention (7) 3, The scope of use is small, the effect is the best and the cost is reduced, it is very successful and effective. 4, very suitable for light, thin, smart, small portable LCD display structure, very particular about reasonable. In summary, the present invention is a rare invention "display device", which not only has practical effects, but also an unprecedented invention design, and is more advanced, novel and technical than the conventional "display device". Because of the different gains, it has indeed complied with the requirements of the invention of the Patent Law. With this in mind, I urge your reviewing committee to conduct a review in accordance with the law, and pray for the early gift of patents, sincerely. Sincerely speaking, the meaning of the content and the illustrations of the various embodiments are only the preferred embodiments of the present invention. Therefore, anyone who knows this skill and the changes in the size of the theory of the present invention and Modifications of the multiplication operation may still be included in the scope of the approved patent application of the present invention.

Page 10 567367 Brief description of the drawings The first diagram is a plan view and a side view of the general structure of a conventional display device known as "display device". The second figure is a three-dimensional structure diagram of the first embodiment of the "display device" of the present invention. The third figure is a three-dimensional structure diagram of the first embodiment of the "display device" of the present invention. The fourth figure is a side view of the structure of the second embodiment of the "display device" of the present invention. The fifth figure is another side view of the structure of the second embodiment of the "display device" of the present invention. The sixth figure is another side view of the structure of the second embodiment of the "display device" of the present invention. Explanation of symbols: 1 LCD panel 11 Upper glass panel 1 2 Lower glass panel 13 Panel electrodes 14 Upper polarizer 15 Lower polarizer 2 Flexible printed circuit board 2 1 Outer pin 2 2 Inner pin 2 3 Signal input terminal 3 Drive integration Circuit element

Page 11 567367 Schematic description 3 1 Integrated circuit wafer 3 2 Metal bumps 4 Conductive glue 4 1 Anisotropic conductive glue 5 Passive element la TCP or COF drive integrated circuit element 2 a Circuit board 3 a LCD display Panel 4 a connector 5 a passive element

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Claims (1)

567367 Announcement VI. Patent application types of display devices, including: a liquid crystal panel, the liquid crystal panel is provided with upper and lower glass panels and panel electrodes thereon, the panel electrodes are provided with a plurality of pins A printed circuit board, the flexible printed circuit board is fixedly arranged at the positive rear end of the liquid crystal panel, and a plurality of driving integrated circuit elements and a plurality of passive elements may be provided at the lower end or the upper end thereof. The flexible printed circuit board is provided with A plurality of external pins, and at least one signal input terminal is provided on one side of the flexible printed circuit board; a conductive adhesive is connected to the panel electrode of the liquid crystal panel and the external pins of the flexible printed circuit board The conductive adhesive is also connected to the integrated circuit element and the flexible printed circuit board; thereby, the display device can be applied to a general-size portable liquid crystal display structure, so that the product can be made light, thin, and compact. , Small, can also effectively prevent signal attenuation and crosstalk. 2 4 The display device as described in item 1 of the scope of patent application, wherein each of the plurality of external pins can be folded at an angle of 180 ° with an R angle after joining the panel electrodes of the liquid crystal panel, and the other side is connected to Before being joined to the liquid crystal panel, it was folded to 180 degrees and fixed. The display device according to item 1 of the scope of patent application, wherein the signal input terminal of the flexible printed circuit board is capable of controlling the driving integrated circuit element by connecting a microprocessor. The display device according to item 1 of the patent application scope, wherein the conductive adhesive may be an anisotropic conductive adhesive. Page 13