CN1567034A

CN1567034A - Symmetrical LCD panel

Info

Publication number: CN1567034A
Application number: CN 03147514
Authority: CN
Inventors: 蔡尚公
Original assignee: AU Optronics Corp
Current assignee: AUO Corp
Priority date: 2003-07-09
Filing date: 2003-07-09
Publication date: 2005-01-19

Abstract

The invention discloses a symmetrical liquid crystal display panel. The symmetric liquid crystal display panel includes: a substrate; at least one source driving Integrated Circuit disposed on a central portion of the peripheral circuit region of the substrate; a Flexible Printed Circuit (FPC) disposed on an edge of the substrate on the same side as the source driver ICs, at least one gate driver IC disposed on a central portion of the FPC; and a plurality of wires connected to the gate driving IC, the source driving IC and the display region of the substrate.

Description

The symmetric form display panels

Technical field

The present invention relates to a kind of display panels (liquid crystal display panel, LCD panel), especially a kind of symmetric form (symmetrical) display panels.

Background technology

Because the low priceization of display panels and high-qualityization, display panels has been widely used in the information products such as notebook computer (notebook), personal digital assistant (PDA), mobile phone and clock and watch.

With reference to figure l, Fig. 1 is the structural representation of known display panels 10.As shown in Figure 1, known display panels 10 mainly comprises: glass substrate 12, and it comprises viewing area (displayarea) 14 and is arranged at glass substrate 12 lip-deep periphery circuit regions 16; At least one is arranged at the source electrode driven integrated circuit (IC) 18 on the periphery circuit region 16 of glass substrate 12; At least one is arranged at the gate driving IC 20 on the periphery circuit region 16 of glass substrate 12; And (flexible printed circuit, FPC) plate 22 to be arranged at the flexible print circuit of edge of periphery circuit region 16 of glass substrate 12.

It should be noted that, flexible printed circuit board 22 also comprises circuit (circuit), many leads 24 for example, they are electrically connected to source drive IC 18, the gate driving IC 20 of display panels 12, and the electrode on the glass substrate 12 (not being shown among Fig. 1).In addition, flexible printed circuit board 22 is as connector (connector), to connect display panels 10 and other electronic components (not being shown among Fig. 1), and can transmit signals to source drive IC 18 and gate driving IC20, source drive IC 18 and gate driving IC 20 export signal to the electrode on the glass substrate 12 more then, with the output and the demonstration of control chart image signal.

With regard to the technology of large-scale production now, because drive IC still can't directly be made on the display panels, therefore, present assembling mode normally is pressed on drive IC on the panel of LCD, for example band carries encapsulation (tape carrier package, TCP) with glass flip chip (chip on glass, COG) encapsulation etc.Wherein, TCP is meant and sees through the packaged type that winding engages with glass substrate, because encapsulation volume is bigger, therefore be applied to mostly in the product of large size panel, and because TCP can only encapsulate an IC at every turn, so essentially on winding and the glass substrate reserve finedraw (slit), so on circuit design, TCP is not more had elasticity.And COG utilizes crystalline substance (flip chip) mode of covering with IC, with anisotropic conducting film (anisotropic conductive film, ACF) or elargol directly adhere on the circuit of glass substrate, though COG can save the cost of winding, if but one of them IC deals with improperly, the full wafer glass substrate will thereby be scrapped, because risk is higher, so COG is used on the few small size panel of IC use amount mostly.

In addition, the not homonymy that known source drive IC 18 and gate driving IC 20 are arranged at the periphery circuit region 16 of glass substrate 12, be used for controlling respectively display panels 10 crisscross data line (data line) and sweep trace (scan line, all be not shown among Fig. 1), with the X of control display panels 10, the signal of Y-axis.Yet, the structure of known this display panels 10 can make the viewing area 14 of display panels 10 can't be positioned at the centre of glass substrate 12, and then make that the entire area of display panels 10 is bigger, and, for convenience, flexible printed circuit board 22 can connect source drive IC 18 and gate driving IC 20 simultaneously, and known structure is arranged at flexible printed circuit board 22 corner of glass substrate 12 mostly, therefore can cause the asymmetric of display panels 10.Moreover, the assembling mode of above-mentioned two kinds of drive IC causes the viewing area 14 of display panels 10 to produce the asymmetric image in the left and right sides, therefore, known display panels 10 can't be produced on the compact and screen of volume needs in the symmetrical electronics and IT products.

Summary of the invention

Therefore, fundamental purpose of the present invention is to provide a kind of symmetric form display panels, and it can be produced on the compact and screen demand of volume is in the symmetrical electronics and IT products.

For achieving the above object, a kind of symmetric form display panels is proposed in a preferred embodiment of the invention, comprising: substrate, and this substrate comprises the viewing area and the periphery circuit region that is arranged on this substrate surface of the middle body that is arranged at this substrate surface; At least one source drive IC, it is arranged on the middle body of this periphery circuit region of this substrate; Flexible printed circuit board, it is arranged at the edge of the periphery circuit region of this substrate, this flexible printed circuit board and this source drive IC are positioned at the same side of this substrate, this flexible printed circuit board has extension, and this extension comprises the gate driving IC at least one middle body that is arranged at this extension; And, the many leads that are connected in this viewing area of this gate driving IC, this source drive IC and this substrate.

Display panels of the present invention is arranged at the gate driving IC that is arranged at the glass substrate edge originally on the flexible printed circuit board, therefore the joint sheet (bonding pad) of the input signal of source drive IC or the area of pressing pad can become greatly, so can effectively reduce the bad problem that produces of pressing because of COG (chip on glass).In addition, the viewing area of glass substrate of the present invention can be arranged at the middle body of glass substrate, the middle body that source drive IC also can be arranged at the periphery circuit region of glass substrate, and gate driving IC can be arranged at the middle body of flexible PCB, makes whole liquid crystal display panel become symmetrical display panels.

Description of drawings

Fig. 1 is the structural representation of known display panels.

Fig. 2 is the structural representation of display panels of the present invention.

Fig. 3 is that the display panels of Fig. 2 is applied to the structural representation in the mobile phone.

Embodiment

Please refer to Fig. 2, Fig. 2 is the structural representation of display panels 30 of the present invention.As shown in Figure 2, display panels 30 of the present invention mainly comprises: glass substrate 32, and it comprises the peripheral circuit plate 36 that is arranged at glass substrate 32 lip-deep viewing areas 34 and is arranged at glass substrate 32 surfaces outside the viewing area 34; Source drive IC38, it is arranged at about middle body of the periphery circuit region 36 of glass substrate 32; And, flexible printed circuit board 40, it is arranged on the edge of glass substrate 32, and this flexible printed circuit board 40 and source drive IC38 are positioned at the same side of glass substrate 32.In addition, flexible printed circuit board 40 has extension, and this extension comprises: at least one gate driving IC 42, and it is arranged at the middle body of this extension; And many leads 44 are used for connecting gate driving IC42, source drive IC38, and the electrode (not being shown among Fig. 2) in the viewing area 34 of glass substrate 32.In addition, flexible printed circuit board 40 is arranged at about middle body of the peripheral circuit area edge of glass substrate 32, and having symmetrical shape, it can be bendable printed circuit board (PCB), flexible copper clad substrate or band and carries encapsulation (tape carrier package).

Wherein, source drive IC 38 can utilize known described COG packaged type to be bonded on the glass substrate 32, for gate driving IC 42, then can utilize and cover brilliant film (chip on film, COF) packaged type is welded on gate driving IC 42 on the flexible printed circuit board 40, it mainly utilizes the adhesion glue that contains conducting particles, anisotropic conducting film (anisotropic conductive film for example, ACF), gate driving IC 42 is fixed in the middle body of flexible printed circuit board 40, and projection (not being shown among Fig. 2) and the lead on the flexible printed circuit board 40 44 on the gate driving IC42 are electrically connected.

Please refer to Fig. 3, Fig. 3 is for being applied to the display panels 30 of Fig. 2 the structural representation in the mobile phone (cellularphone) 50.As shown in Figure 3, because the gate driving IC42 of display panels 30 of the present invention is arranged at about middle body of flexible printed circuit board 40, therefore only comprise source drive IC38 on the glass substrate 32, so the viewing area 34 of glass substrate 32 can be arranged at about middle body on glass substrate 32 surfaces, satisfy the symmetrical demand of mobile phone screen, and display panels 30 is assembled on the mobile phone 50, can design one do not take up space, compact mobile phone 50.

In addition, because the peripheral circuit area 36 of display panels 30 of the present invention only comprises source drive IC38, therefore the joint sheet (bonding pad) of the input signal of source drive IC38 or the area of pressing pad can become big, so can effectively suppress known because of the bad problem that produces of COG pressing, also can reduce simultaneously the area of periphery circuit region 36, and then increase the visual range of viewing area 34, to meet the modern demand of in certain space, holding giant-screen.

It should be noted that, be that example illustrates with undersized display panels in a preferred embodiment of the invention, yet disclosed technology also can be used in other various panels among the present invention, amorphous silicon (amorphous silicon) TFT thin film transistor monitor (thin film transistor LCD, TFT-LCD) panel for example.In addition, display panels of the present invention and not only the limitation be applied in the mobile phone, any demand is the electronics and IT products of symmetrical screen, for example intelligent mobile phone (smart phone) all can be utilized display panels of the present invention.In addition, the present invention not only limits gate driving IC is done on flexible printed circuit board, and the present invention also can be made in source drive IC on the flexible printed circuit board, and gate driving IC is made on the glass substrate, to reach same effect.Moreover the shape of glass substrate of the present invention and flexible printed circuit board is not defined as rectangle, as long as be the shape of symmetry, for example octagon, trapezoidal etc. all is applicable among the present invention.

In brief, display panels of the present invention is to utilize the COF packaged type that gate driving IC is arranged on the flexible printed circuit board, therefore only be provided with source drive IC on the glass substrate, can make the joint sheet area of source drive IC become big, the problem that minimizing is produced because of COG is encapsulated on the glass substrate.In addition, because the viewing area of display panels of the present invention is positioned at about middle body that about middle body, the gate driving IC of about middle body of glass substrate, periphery circuit region that source drive IC is positioned at glass substrate are positioned at flexible printed circuit board, and the shape of glass substrate and flexible printed circuit board is all symmetric shape, and therefore display panels of the present invention is that screen is symmetrical display panels.

Compare with known display panels, display panels of the present invention utilizes COG and COF packaged type that source drive IC and gate driving IC are assembled on glass substrate and the flexible printed circuit board respectively, therefore the area of the peripheral circuit area of glass substrate can dwindle, to increase the viewing area area, and satisfy the symmetrical demand of screen, if display panels of the present invention is assembled on the electronics and IT products, can design do not take up space, compact electronics and IT products.

The above only is the preferred embodiments of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.

Claims

1. A symmetrical liquid crystal display panel, comprising:

a substrate, which includes a display area disposed on the central portion of the surface of the substrate and a peripheral circuit area disposed on the surface of the substrate;

at least one source driver integrated circuit disposed on the central portion of the peripheral circuit area of the substrate;

A flexible printed circuit board, which is arranged on the edge of the peripheral circuit area of the substrate, the flexible printed circuit board and the source driver IC are located on the same side of the substrate, the flexible printed circuit board has an extension, and the extension includes at least one gate drive IC disposed on the central portion of the extension; and

A plurality of wires are connected to the gate driver IC, the source driver IC and the display area of the substrate.

2. The symmetrical liquid crystal display panel as claimed in claim 1, wherein the liquid crystal display panel is an amorphous silicon thin film transistor liquid crystal display panel.

3. The symmetrical liquid crystal display panel as claimed in claim 1, wherein the substrate is an approximately rectangular glass substrate.

4. The symmetrical liquid crystal display panel as claimed in claim 1, wherein the symmetrical liquid crystal display panel can be applied to a mobile phone or a smart mobile phone.

5. The symmetrical liquid crystal display panel as claimed in claim 1, wherein the flexible printed circuit board comprises a flexible printed circuit board, a flexible copper foil substrate or a flexible tape carrier package.

6. A liquid crystal display panel, comprising:

a substrate, which includes a display area and a peripheral circuit area disposed on the surface of the substrate;

at least one first driver integrated circuit disposed on the peripheral circuit area of the substrate;

A flexible printed circuit board, which is arranged on the edge of the peripheral circuit area of the substrate, the flexible printed circuit board and the first driver IC are located on the same side of the substrate, the flexible printed circuit board has an extension, and the extension includes at least one second driver IC; and

A plurality of wires are connected to the first driver IC, the second driver IC and the display area of the substrate.

7. The liquid crystal display panel as claimed in claim 6, wherein the liquid crystal display panel is an amorphous silicon thin film transistor liquid crystal display panel.

8. The liquid crystal display panel as claimed in claim 6, wherein the first driver IC is a source driver IC, and the second driver IC is a gate driver IC.

9. The liquid crystal display panel as claimed in claim 8, wherein the substrate is an approximately rectangular glass substrate.

10. The liquid crystal display panel as claimed in claim 9, wherein the source driver IC is arranged on the central portion of the peripheral circuit area on the longer side of the substrate, and the gate driver IC is arranged on the flexible printed circuit board The central part of the substrate, and the display area of the substrate is disposed on the central part of the substrate, so that the liquid crystal display panel is a symmetrical liquid crystal display panel.

11. The liquid crystal display panel as claimed in claim 10, wherein the symmetrical liquid crystal display panel can be applied to a mobile phone or a smart mobile phone.

12. The liquid crystal display panel as claimed in claim 6, wherein the flexible printed circuit board comprises a flexible printed circuit board, a flexible copper foil substrate or a tape carrier package.