CN215895190U - Narrow frame structure of cholesterol liquid crystal display - Google Patents

Abstract

The utility model discloses a narrow frame structure of a cholesterol liquid crystal display screen.A drive chip is arranged at one side edge of a cholesterol liquid crystal, one end of a lower drive control line corresponding to a lower electrode is electrically connected with the drive chip outside a display area, the lower drive control line is arranged in the display area and is vertical to the side edge where the drive chip is positioned, the lower drive control line extends in a gap between two adjacent display units, and the other end of the lower drive control line is electrically connected with the lower electrode through an inner vertical connecting line structure in the display area; one end of an upper driving control line corresponding to the upper electrode is electrically connected with the driving chip outside the display area, and the other end of the upper driving control line is electrically connected with the upper electrode through an outer vertical connecting line structure outside the display area. The utility model provides the electrical connection of the upper electrode and the lower electrode by utilizing the inner/outer vertical connecting wire structure, the display efficiency is not influenced, the narrow frame characteristic is realized by arranging the driving chip on one side, the screen occupation ratio is improved, the size and the weight of the display screen are reduced, and the convenience of handheld operation is improved.

Description

Narrow frame structure of cholesterol liquid crystal display

Technical Field

The utility model relates to a cholesterol liquid crystal display screen technology, in particular to a narrow frame structure of a cholesterol liquid crystal display screen.

Background

In response to the requirements of environmental protection, power saving, and eye protection, the reflective display screen has become the mainstream of the display screen technology. The reflective display screen has the characteristics of no need of backlight, comfortable reading and power saving. In order to improve the display quality, the development direction of the prior art mainly aims to improve the reflectivity and contrast, increase the color display capability, accelerate the screen update frequency and other directions, and further has a great opportunity to be applied to products such as electronic notebooks, electronic books, electronic billboards, electronic volume labels and the like.

Among various existing reflective Display technologies, the Cholesteric Liquid Crystal Display (Cholesteric Liquid Crystal Display) technology is compatible with the existing LCD Liquid Crystal Display production and manufacturing methods, and easy to realize a colorful method, and has the characteristics of high reflectivity, power saving, and the like, so that the Cholesteric Liquid Crystal Display (Cholesteric Liquid Crystal Display) technology is expected to be applied to a great number of products.

As shown in fig. 1, the screen display schematic diagram of the cholesteric liquid crystal display is that its upper and lower electrodes are electrically connected and drive-controlled with the conductive contact pads and the flexible circuit board by using the driving control lines on the substrate. The biggest problem in the prior art is that when the resolution of a display screen is improved, along with the increase of a driving control line, the requirement of a control line design space is multiplied, so that the display screen is difficult to obtain a narrow frame characteristic. As shown in fig. 2, the conventional structure and design method at least have more than two side frames for driving control, which cannot realize the narrow frame characteristic, and the advantage of the narrow frame display screen mainly helps to improve the screen occupation ratio, besides the beauty, the size of the screen can be reduced, the weight can be reduced, the handheld device can be operated and applied more easily, and the cost can be reduced by further looking at the display screen. The display screen frame definition is the effective display area to screen side margin.

The common problem of the cholesteric liquid crystal display is that the horizontal or vertical gap position between adjacent display units, as shown in fig. 3, which is the ab cross-section position of the horizontal gap in fig. 1, is often affected by the wrong electric field to cause light leakage, resulting in reduced display contrast, due to the discontinuous electric field or different display contents and different voltage operation differences.

Disclosure of Invention

The utility model aims to provide a narrow frame structure of a cholesterol liquid crystal display screen, which solves the characteristic problems that the existing cholesterol liquid crystal display screen technology cannot realize narrow frames and is thick, heavy, large in size and the like.

The technical scheme adopted by the utility model is as follows:

a narrow frame structure of cholesterol liquid crystal display screen is prepared as setting cholesterol liquid crystal in top and bottom base plates, forming top and bottom base plates by transparent material, fixing cholesterol liquid crystal by conductive frame glue to prevent leakage, setting top electrode between top base plate and cholesterol liquid crystal, setting bottom electrode between bottom base plate and cholesterol liquid crystal, forming display unit by intersection region of top electrode and bottom electrode, setting necessary horizontal and vertical gap between adjacent display units, forming display area by region corresponding to cholesterol liquid crystal, setting drive chip at one side edge of cholesterol liquid crystal, connecting one end of lower drive control line corresponding to bottom electrode to drive chip outside display area, setting lower drive control line in display area to be vertical to side edge of drive chip and extending lower drive control line along vertical direction in gap between two adjacent display units, the other end of the lower driving control line is electrically connected with the lower electrode through an internal vertical connecting line structure in the display area; one end of an upper driving control line corresponding to the upper electrode is electrically connected with the driving chip outside the display area, and the other end of the upper driving control line is electrically connected with the upper electrode through an outer vertical connecting line structure outside the display area; the lower electrode is isolated from the lower substrate by an insulating layer, the upper and lower driving control lines are disposed below the insulating layer,

the inner vertical connecting line structure is characterized in that a connecting hole is formed in the end point corresponding to the lower drive control line through the insulating layer so that the lower electrode is electrically connected with the lower drive control line;

the outer vertical connecting line structure is characterized in that a connecting hole and a Conductive contact pad are arranged at the position of Conductive frame glue of an Anisotropic Conductive gold ball (ACP) through an insulating layer, the position corresponds to the end point of an upper driving control line to form a break structure, when the lower substrate and the upper substrate are jointed and pressed, the Anisotropic Conductive gold ball is pressed to form a Conductive path, and the upper driving control line is vertically and electrically connected with the relative position of an upper electrode through the Conductive contact pad and the Anisotropic Conductive gold ball.

Specifically, the conductive contact pad uses the same material and process as the lower electrode. The other conducting frame glue positions of the non-outer vertical connecting line structure still keep the insulating and non-electrical conduction characteristics because no upper and lower structure break difference is pressed to form a conducting path.

Furthermore, as a preferred embodiment, the cholesterol liquid crystal display screen adopts a passive driving mode, and the upper electrode comprises more than one X electrode (X1-Xn) which is vertical to the side where the driving chip is located and is parallel to each other; each X electrode is correspondingly and electrically connected with an upper electrode driving wire, and the lower electrode comprises more than one Y electrode (Y1-Ym) which is parallel to the side where the driving chip is located and is parallel to each other; each Y electrode is electrically connected to a lower electrode driving line.

The electrodes (X1-Xn) and the electrodes (Y1-Ym) perpendicular to each other constitute a display unit for controlling the cholesterol liquid crystal in the middle. As shown in fig. 4, the intersection position of the upper and lower electrodes of each group forms an independent basic display unit, the resolution (R) of a display screen is mainly determined by the number of the upper and lower electrodes (resolution R = mxn), when a display screen is updated, the upper and lower electrodes can scan in sequence to apply different effective voltages to the cholesteric liquid crystal in the pixel unit corresponding to any electrode, so as to generate different arrangement state changes of cholesteric liquid crystal molecules, thereby generating a desired reflective display state.

Furthermore, as a preferred embodiment, the cholesterol liquid crystal display adopts an active driving mode, the upper electrode is an integrated common electrode, the lower electrode comprises a plurality of pixel electrodes, each pixel electrode is connected with a TFT device, the TFT device is controlled by an electrical switch, and the intersection area of the common electrode and the pixel electrode forms a display unit; the upper drive control line is a Vcom line, the lower drive control line comprises a scanning line and a data line, and a transverse connecting line is arranged in a gap between the display units along the horizontal direction; one end of the Vcom line is electrically connected with the drive chip outside the display area, and the other end of the Vcom line is electrically connected with the common electrode through an outer vertical connecting line structure outside the display area; one end of the scanning line and the data line is electrically connected with the driving chip outside the display area, the other end of the scanning line and the data line is arranged in the display area, one group of lines is electrically connected with the pixel electrode through the inner vertical connecting line structure and the transverse connecting line and the TFT device pin at the same horizontal position, and the other group of lines is electrically connected with the pixel electrode through the TFT device pin at the same vertical position.

Specifically, an independent display unit is formed by a common electrode of an upper electrode and a pixel electrode of a lower electrode to control the middle cholesterol liquid crystal, the voltage of the pixel electrode is provided by sequentially turning on a TFT device through a scanning Line (Gate Line, G1-Gi) and a Data Line (D1-Dj) of a same lower substrate, wherein the scanning Line and the Data Line are both lower driving control lines aiming at providing electrical connection and control assistance between the electrodes and a driving chip or a flexible circuit board, and the TFT device refers to the abbreviation of a Thin Film Transistor (Thin Film Transistor). As shown in fig. 12, the resolution (R) of a display panel is mainly determined by the number of the pixel electrodes on the lower substrate, i.e. the number of the scan lines (Gate Line) and the Data lines (Data Line) (resolution R = ixj), when a display screen is updated, the scan lines (Gate Line, G1-Gi) and the Data lines (Data Line, D1-Dj) of the lower substrate sequentially turn on the TFT devices, and provide effective voltages of different degrees to the cholesteric liquid crystal in the pixel units corresponding to the pixel electrodes, so as to generate different degree arrangement state changes of the cholesteric liquid crystal molecules, thereby generating a desired reflective display state.

Further, as a preferred embodiment, a light shielding bar is provided in a vertical direction or a horizontal direction in a gap between adjacent display units; or the gaps between the adjacent display units are provided with the light shading strips along the vertical direction and the horizontal direction.

Furthermore, as a preferred embodiment, the light-shielding strip and the lower driving control line in the vertical direction are molded by the same process and metal materials, and are not electrically connected; the horizontal shading strip is made of low-light-transmission resin material or metal material; when the horizontal shading strip is formed by adopting a metal material, the horizontal shading strip and the lower driving control line are respectively formed by adopting different metal materials and are isolated by utilizing an insulating layer so as to avoid the electric connection short circuit between the horizontal shading strip and the lower driving control line.

Further, as a preferred embodiment, the insulating layer is made of silicon nitride (SiNx, about 150-500 nm thick), silicon oxide (SiOx, about 100-450 nm thick) or a photosensitive resin film (about 1000-4000 nm thick).

Further, as a preferred embodiment, a grounded ground ring is disposed inside or outside the conductive frame adhesive, and at least one end of the vertical light-shielding strip or the horizontal light-shielding strip is connected to the ground ring to electrically connect to the ground GND signal, so as to avoid coupling interference with the upper electrode or the lower electrode.

Further, as a preferred embodiment, the driving chip is an upper and lower electrode integrated driving chip, and one end of the upper driving control line and one end of the lower driving control line are respectively connected to the corresponding pins.

Further, as a preferred embodiment, the driving chip includes an upper driving chip and a lower driving chip which are arranged at the same side of the cholesteric liquid crystal at intervals, one end of the upper driving control line is connected to the upper driving chip, and one end of the lower driving control line is connected to the lower driving chip.

Further, as a preferred embodiment, the common material of the upper substrate and the lower substrate is glass or plastic film, and the common material of the upper substrate and the lower substrate is generally between 0.2mm and 1.1mm thick when glass is used, and generally between 0.1 mm and 0.2mm thick when plastic film is used, and the common material includes Polyimide (PI, Polyimide), Polyethylene Terephthalate (PET), Polyethersulfone (PES), Polymethylmethacrylate (PMMA), and Polyethylene Naphthalate (PEN).

Further, as a preferred embodiment, the upper and lower driving control lines and their terminals provide electrical connection and control assistance between the electrodes and the driving chip or the flexible circuit board, and the common materials are metals such as aluminum (Al), molybdenum (Mo), titanium (Ti), silver (Ag), copper (Ag) or corresponding alloy materials, and the thickness is generally between about 100nm and 350 nm.

Further, as a preferred embodiment, the conductive sealant limits the liquid crystal area and prevents the liquid crystal from leaking and polluting.

Further, as a preferred embodiment, the surface of the cholesteric liquid crystal is provided with an alignment film, and the alignment film makes the alignment direction of the liquid crystal molecules uniform, so that the liquid crystal molecules can obtain better controllability, and the thickness is generally between 30 nm and 100 nm.

Further, as a preferred embodiment, the cholesteric liquid crystal is provided with spacers for supporting and maintaining the height and uniformity of Cell space between the substrates, and the thickness of the spacers is about 2.0-4 um.

Further, as a preferred embodiment, the top and bottom electrodes are transparent, and the common material is ITO, typically with a thickness of about 40-700 nm.

Further, as a preferred embodiment, the Conductive contact pad provides electrical connection between the electrode control line terminal of the lcd panel and the metal bump of the driving chip or between the flexible circuit board, and the connection material is usually Anisotropic Conductive Film (ACF).

Further, as a preferred embodiment, a Flexible Printed Circuit (FPC) connects the display control signal to the host or the control main board.

Further, as a preferred embodiment, the driver Chip is used for receiving different display instructions of the host or the motherboard, including requirements of brightness, gray scale, color …, and providing different voltage and frequency changes to drive the liquid crystal display to operate, so as to generate different corresponding pictures, generally speaking, the driver Chip has two main joint structure modes, one is COF (Chip On Flex or Chip On Film), and the driver Chip is jointed On the flexible circuit board; the other method is a COG (chip On glass) method, in which the driver chip is directly bonded to the glass driver control line terminal.

By adopting the technical scheme, 1, the reflective cholesterol liquid crystal display screen driven by the single side realizes the narrow frame characteristic, improves the screen occupation ratio, reduces the size and the weight of the display screen, and improves the convenience of handheld operation. 2. The inner/outer vertical connecting line structure is used for providing the electrical connection of the driving electrodes of the upper substrate or the lower substrate in the non-display unit area, and the display efficiency is not influenced. 3. The light-shielding strip and the drive control line form a light-shielding band, so that the light leakage problem of the color push-stack cholesterol liquid crystal screen is solved.

Drawings

The utility model is described in further detail below with reference to the accompanying drawings and the detailed description;

FIG. 1 is a schematic view of a passively driven cholesteric liquid crystal display;

FIG. 2 is a schematic diagram of a conventional technique in which more than two side frames are used for driving control;

FIG. 3 is a schematic view illustrating light leakage at a gap position between display units of a conventional cholesteric liquid crystal display;

FIG. 4 is a schematic structural diagram of a single driver chip embodiment 1 employing a passive driving architecture according to the present invention;

FIG. 5 is a schematic diagram of an internal vertical interconnect structure according to the present invention;

FIG. 6 is a schematic diagram of an external vertical connection line according to the present invention;

FIG. 7 is a schematic structural diagram of a dual-drive chip embodiment 2 according to the present invention, which employs a passive drive architecture;

FIG. 8 is a schematic structural diagram of embodiment 3 of the present invention, in which a passive driving architecture is adopted, in which a single driving chip has a light-shielding strip;

FIG. 9 is a schematic view of a light-shielding bar in a display cell gap according to embodiment 3 of the present invention;

FIG. 10 is a schematic view of the light leakage prevention structure of the light-shielding strip in the color cholesteric liquid crystal display panel according to embodiment 3 of the present invention;

FIG. 11 is a schematic structural diagram of an embodiment 4 of the dual-drive chip with a light-shielding strip according to the present invention, wherein the dual-drive chip employs a passive driving architecture;

FIG. 12 is a schematic structural diagram of embodiment 5 in which scan lines of a single driver chip of an active driving scheme are connected to TFTs by internal vertical connecting lines;

FIG. 13 is a schematic connection diagram of an internal vertical interconnect structure according to embodiment 5 of the present invention;

FIG. 14 is a schematic structural diagram of embodiment 6 in which scan lines of a dual driver chip of an active driving architecture are connected to TFTs by internal vertical connecting lines.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

As shown in one of fig. 4 to 14, the present invention discloses a narrow frame structure of a cholesteric liquid crystal display, a cholesteric liquid crystal 1 is disposed in an upper substrate 2 and a lower substrate 3, the upper substrate 2 and the lower substrate 3 are both formed of a transparent material, the periphery of the cholesteric liquid crystal 1 is fixed by a conductive frame glue 4 so as not to leak, an upper electrode 5 is disposed between the upper substrate 2 and the cholesteric liquid crystal 1, a lower electrode 6 is disposed between the lower substrate 3 and the cholesteric liquid crystal 1, a display unit 7 is formed at an intersection area of the upper electrode 5 and the lower electrode 6, a necessary horizontal and vertical gap 8 is reserved between adjacent display units 7, a display area is formed at an area corresponding to the cholesteric liquid crystal 1, a driving chip 9 is disposed at one side of the cholesteric liquid crystal 1, one end of a lower driving control line 10 corresponding to the lower electrode 6 is electrically connected to the driving chip 9 outside the display area, the lower driving control line 10 is disposed perpendicular to the side where the driving chip 9 is located in the display area, the lower driving control line 10 extends along the vertical direction in the gap 8 between two adjacent display units 7, and the other end of the lower driving control line 10 is electrically connected with the lower electrode 6 through an internal vertical connecting line structure 12 in the display area; one end of an upper driving control line 11 corresponding to the upper electrode 5 is electrically connected with the driving chip 9 outside the display area, and the other end of the upper driving control line 11 is electrically connected with the upper electrode 5 through an outer vertical connecting line structure 13 outside the display area; the lower electrode 6 is separated from the lower substrate 3 by an insulating layer 14,

the inner vertical connecting line structure 12 is provided with a connecting hole 15 at the end corresponding to the lower driving control line 10 through an insulating layer 14 so as to electrically connect the lower electrode 6 with the lower driving control line 10;

the outer vertical connecting line structure 13 is a structure in which a connecting hole 15 and a conductive contact pad 16 are formed at the end point corresponding to the upper driving control line 11 through an insulating layer 14 at the position of the conductive frame glue 4 of the mixed anisotropic conductive gold ball, and when the lower substrate 3 and the upper substrate 2 are attached and pressed, the anisotropic conductive gold ball 17 is pressed to form a conductive path, so that the upper driving control line 11 is vertically and electrically connected with the relative position of the upper electrode 5 through the conductive contact pad 16 and the anisotropic conductive gold ball 17.

Example 1:

as shown in fig. 4, the cholesteric liquid crystal display adopts a passive driving structure, a lower electrode 6 (Y1-Ym) of the cholesteric liquid crystal display is designed to be parallel to a driving frame, a lower driving control line 10(Y electrode driving control line) corresponding to the lower electrode 6 is arranged outside a display area, one end of the lower driving control line is electrically connected with a driving chip 9 or a flexible circuit board through a conductive contact pad 16 and is subjected to driving control, the lower driving control line extends along the vertical direction of a gap 8 of an adjacent display unit 7 in the display area, and the other end of the lower driving control line guides an electrical signal to the corresponding lower electrode (Y1-Ym) through an inner vertical connection line; in addition, the upper electrodes 5 (X1-Xn) are designed to be perpendicular to the frame where the driving chip is located, the upper driving control lines 11(X electrode driving control lines) corresponding to the upper electrodes 5 are electrically connected and driven and controlled with the driving chip 9 or the flexible circuit board through the conductive contact pads 16 at one end outside the display area, and the other end conducts electrical signals to the corresponding electrodes (X1-Xn) through the external vertical connecting lines outside the same display area.

Referring to fig. 5, the lower driving control line 10 of the lower substrate 3 can be electrically connected to the driving electrode, i.e., the lower electrode 6, through the connection hole 15 of the insulating layer 14.

The outer vertical connecting line structure 13 can refer to the schematic diagram 6, the frame glue 4 mixes the anisotropic conductive gold ball 17, when the upper substrate 2 and the lower substrate 3 are pressed, the upper driving control line 11 of the lower substrate 3 and the upper electrode 5 of the upper substrate 2 are in relative position, the anisotropic conductive gold ball 17 can provide vertical electrical connection due to the pressure applied by the structure break difference, and the other conductive frame glue positions of the non-outer vertical connecting line structure are formed due to the pressure applied by the structure break difference, and the insulating non-electrical conduction is still maintained: the structure offset space is formed by forming a connection hole 15 and a conductive contact pad 16 on the insulating layer 14 of the upper electrode 5(X electrode) and the upper driving control line 11 at the corresponding end, wherein the conductive contact pad 16 is made of the same material and process as the lower electrode 6.

The embodiment has the advantages that the design and the structure of the passive driving control line of the single-side frame are used, the single-side driving control is realized, the characteristic of three-side narrow frame is achieved, the screen occupation ratio is improved, the size and the weight of the display screen are reduced, and the convenience of handheld operation is improved.

Example 2:

as shown in fig. 7, the cholesterol liquid crystal display panel adopts a passive driving structure, which is basically the same as that of embodiment 1, and the main difference is that the electrode driving control line is not electrically connected and driven by the same driving chip 9, but is respectively connected to the X electrode driving and the Y electrode driving of the corresponding driving chip.

Outside the display area, in order to prevent the lower driving control line 10 and the upper driving control line 11 on the lower substrate 3 from generating an electrical short circuit due to overlapping contact, the two electrode driving control lines need to be manufactured in a cross-layer manner, and the insulating layer 14 is used to isolate the electrical short circuit, the insulating layer 14 can be made of silicon nitride (SiNx, thickness is about 150-500 nm), silicon oxide (SiOx, thickness is about 100-450 nm) or photosensitive transparent resin film (thickness is about 1000-4000 nm).

The advantage of this embodiment lies in using the passive drive control line design and the framework of unilateral frame, realizes unilateral drive control, reaches trilateral narrow frame characteristic, improves the screen and accounts for the ratio, reduces display screen size and weight to promote handheld operation convenience, drive chip 9 uses and need not integrate X in addition, Y electrode drive function, and current standard drive chip can use, reduces development cost.

Example 3:

as shown in fig. 8, the cholesteric liquid crystal 1 display screen adopts a passive driving structure, which is substantially the same as that of embodiment 1, and the main difference is that in the display region, vertical light-shielding strips 18 are designed and manufactured in the vertical direction of the gaps 8 between adjacent display units 7, the vertical light-shielding strips 18 and the lower driving control lines 10 use the same process and metal materials, but are not electrically connected, and in addition, in the display region, horizontal light-shielding strips 19 are also manufactured in the horizontal direction of the gaps 8 between adjacent display units 7, and the horizontal light-shielding strips 19 can be made of metal or low-transmittance tree finger materials, such as Black tree fingers (Black Resin). When the horizontal light-shielding strips are made of metal, in order to prevent the electrical short circuit between the lower driving control lines 10 orthogonal to the horizontal light-shielding strips, the horizontal light-shielding strips 19 and the lower driving control lines 10 need to be made of different metal layers, and the insulating layer 14 is used to isolate the electrical short circuit chance, the insulating layer 14 can be made of silicon nitride (SiNx, thickness is about 150-500 nm), silicon oxide (SiOx, thickness is about 100-450 nm), or photosensitive transparent resin film (thickness is about 1000-4000 nm).

As shown in fig. 8, when the vertical light-shielding strips 18 or the horizontal light-shielding strips 19 are made of metal, the design of the ground Ring 21(GND Ring) inside or outside the sealant 4 can be used, and the example of fig. 8 is an inside design, in which the metal light-shielding strips are designed to be electrically connected to the GND signal, so that the upper electrode 5 and the lower electrode 6 will not generate electric field signal coupling interference due to overlapping with the metal light-shielding strips.

The vertical light-shielding strips 18 and the horizontal light-shielding strips 19 are formed in this embodiment in order to combine with the bottom driving control lines 10, and as shown in fig. 9, light-shielding stripes 20 are formed at the positions of the horizontal and vertical gaps 8 between all the display units 7. Since the conventional cholesteric liquid crystal 1 panel technology is prone to have a problem of light leakage at the position of the gap 8, this design structure can help to improve the gap light leakage when the color cholesteric liquid crystal panel is applied, as shown in fig. 10 (cd cross section position of fig. 8), because the color cholesteric liquid crystal panel is stacked with a plurality of cholesteric liquid crystal panels, the light shielding tape 20 between the display units 7 of the upper cholesteric liquid crystal panel (e.g., the first liquid crystal panel) can effectively shield and reduce the problem of light leakage accumulated at the gap 8 between the display units 7 of the lower stacked liquid crystal panel (e.g., the second and third liquid crystal panels).

The advantage of this embodiment lies in using the passive drive control line design and the framework of unilateral frame, can realize trilateral narrow frame characteristic, improves the screen and accounts for the ratio, reduces display screen size and weight to improve handheld operation convenience, can improve contrast help when being applied to color cholesterol liquid crystal display in addition.

Example 4:

as shown in fig. 11, the cholesteric liquid crystal display 1 adopts a passive driving structure, which is substantially the same as that of embodiment 3, and the main difference is that the electrode driving control lines are not electrically connected and driven by the same driving chip 9, but are respectively connected to the corresponding driving chips 9.

Outside the display area, in order to prevent the lower driving control line 10 and the upper driving control line 11 on the lower substrate 3 from generating an electrical short circuit due to overlapping contact, the two electrode driving control lines need to be manufactured in a cross-layer manner, and the insulating layer 14 is used to isolate the electrical short circuit, the insulating layer 14 can be made of silicon nitride (SiNx, thickness is about 150-500 nm), silicon oxide (SiOx, thickness is about 100-450 nm) or photosensitive transparent resin film (thickness is about 1000-4000 nm).

This embodiment advantage lies in using the passive drive control line design and the framework of unilateral frame, realize unilateral drive control, reach trilateral narrow frame characteristic, improve the screen and account for than, reduce display screen size and weight, and promote handheld operation convenience, drive chip 9 uses and need not integrate X in addition, Y electrode drive function, current standard drive chip 9 can use, reduce development cost, can improve contrast help when being applied to colored cholesterol liquid crystal 1 display screen in addition.

Example 5:

as shown in fig. 12, the cholesteric liquid crystal display 1 adopts an active driving structure, the upper electrode 5 of the upper substrate 2 is an integrated common electrode, the lower electrode 6 of the lower substrate 3 is composed of a plurality of pixel electrodes, the direction parallel to the driving frame is designed, each pixel electrode is connected with a TFT device 23, the TFT devices 23 are controlled by an electrical switch, the intersection region of the common electrode and the pixel electrodes forms a display unit 7, the lower driving control line 10 of the lower substrate 3 comprises data lines 101 (D1-Dj) and scanning lines 102 (G1-Gi), and a transverse connecting line is arranged in the gap between the display units along the horizontal direction; the scanning lines and the data lines are electrically connected and drive-controlled with the driving chip 9 or the flexible circuit board at one end outside the display area through the conductive contact pad 16, and extend along the vertical direction of the gap 8 between the adjacent display units 7 of the lower substrate 3 in the display area, wherein one group of control lines are electrically connected to the TFT devices 23 at the same horizontal position through the internal vertical connecting lines 12 and the transverse connecting lines 22, and the other group of control lines are directly electrically connected to the TFT devices 24 at the same vertical position. In addition, the upper driving control line 11(Vcom line) corresponding to the common electrode of the upper substrate 2 is electrically connected to and drives and controls the driving chip 9 or the flexible circuit board through the conductive contact pad 16 at one end outside the display region, and the other end conducts the electrical signal to the upper electrode of the upper substrate 2, that is, the common electrode 5, through the external vertical connection line 13 outside the display region.

As shown in fig. 13, the lower driving control line of the lower pixel electrode of the lower substrate 3 may be electrically connected to the horizontal connection line 22 through the connection hole 15 of the insulating layer 14.

The outer vertical connection line structure 13 can refer to fig. 6 of the outer vertical connection line structure 13 in embodiment 1, and also the sealant 4 is mixed with the anisotropic conductive gold balls 17, and the anisotropic conductive gold balls 17 are applied to provide vertical electrical connection by using the structure difference.

The embodiment has the advantages that the design and the structure of the active drive control line of the single-side frame are used, the single-side drive control is realized, the characteristic of three-side narrow frame is achieved, the screen occupation ratio is improved, the size and the weight of the display screen are reduced, and the convenience of handheld operation is improved.

Example 6:

as shown in fig. 14, the cholesterol liquid crystal 1 display screen adopts an active driving structure, which is basically the same as that of embodiment 5, and the main difference is that the electrode driving control lines are not electrically connected and driven by the same driving chip 9, but are respectively connected to the corresponding driving chips 9.

In order to prevent the driving control lines (the scan lines 102 and the data lines 101) of the lower substrate 3 from being electrically connected due to overlapping, the two electrode driving control lines need to be formed in a cross-layer manner, and the insulating layer 14 is used to isolate the possibility of electrical short circuit, the insulating layer 14 can be made of silicon nitride (SiNx, thickness of about 150-500 nm), silicon oxide (SiOx, thickness of about 100-450 nm), or photosensitive transparent resin film (thickness of about 1000-4000 nm).

The embodiment has the advantages that the design and the structure of the active driving control line of the single-side frame are used, the single-side driving control is realized, the characteristic of three-side narrow frame is achieved, the screen occupation ratio is improved, the size and the weight of the display screen are reduced, the handheld operation convenience is improved, in addition, the driving chip 9 is used without integrating the X and Y electrode driving functions, the existing standard driving chip 9 can be used, and the development cost is reduced.

By adopting the technical scheme, 1, the reflective cholesterol liquid crystal display screen driven by the single side realizes the narrow frame characteristic, improves the screen occupation ratio, reduces the size and the weight of the display screen, and improves the convenience of handheld operation. 2. The inner/outer vertical connecting line structure 13 is used to provide electrical connection for the driving electrodes of the upper substrate 2 or the lower substrate 3 in the non-display unit 7 region without affecting the display efficiency. The lower electrode 6 is parallel to the driving frame, the electrode control line in the display area of the lower substrate 3 is arranged in the gap 8 of the display unit 7, 3, the shading strip and the driving control line form a shading band 20, and the light leakage problem of the color push-stack cholesterol liquid crystal screen is improved.

It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Claims (9)

1. A narrow frame structure of cholesterol liquid crystal display screen, its cholesterol liquid crystal is set up in upper substrate and infrabasal plate, and cholesterol liquid crystal is fixed with not leaking by the frame of electrically conducting glue all around, upper substrate and with cholesterol liquid crystal between set up the top electrode, the infrabasal plate with cholesterol liquid crystal between set up the bottom electrode, top electrode and bottom electrode intersect region form the display element, reserve necessary level and vertical clearance between the adjacent display element, the regional display area that corresponds of cholesterol liquid crystal constitutes its characterized in that: the driving chip is arranged at one side edge of the cholesterol liquid crystal, one end of a lower driving control line corresponding to the lower electrode is electrically connected with the driving chip outside the display area, the lower driving control line is arranged in the display area and is vertical to the side edge where the driving chip is arranged, the lower driving control line extends in the vertical direction in a gap between every two adjacent display units, and the other end of the lower driving control line is electrically connected with the lower electrode through an inner vertical connecting line structure in the display area; one end of an upper driving control line corresponding to the upper electrode is electrically connected with the driving chip outside the display area, and the other end of the upper driving control line is electrically connected with the upper electrode through an outer vertical connecting line structure outside the display area; the lower electrode is isolated from the lower substrate by an insulating layer, the upper and lower driving control lines are disposed below the insulating layer,

the inner vertical connecting line structure is characterized in that a connecting hole is formed in the end point corresponding to the lower drive control line through the insulating layer so that the lower electrode is electrically connected with the lower drive control line;

the outer vertical connecting line structure is characterized in that a connecting hole and a conductive contact pad are arranged at the end point corresponding to the upper drive control line through an insulating layer at the position of the conductive frame glue of the mixed anisotropic conductive gold ball to form a break difference structure, and when the lower substrate is attached to and pressed by the upper substrate, the anisotropic conductive gold ball is pressed to form a conductive path, so that the upper drive control line is vertically and electrically connected with the relative position of the upper electrode through the conductive contact pad and the anisotropic conductive gold ball.

2. The narrow bezel structure of a cholesteric liquid crystal display as claimed in claim 1, wherein: the cholesterol liquid crystal display screen adopts a passive driving mode, and the upper electrode comprises more than one X electrode which is vertical to the side where the driving chip is positioned and is parallel to each other; each X electrode is correspondingly and electrically connected with an upper electrode driving wire, and the lower electrode comprises more than one Y electrode which is parallel to the side where the driving chip is located and is parallel to each other; each Y electrode is electrically connected to a lower electrode driving line.

3. The narrow bezel structure of a cholesteric liquid crystal display as claimed in claim 1, wherein: the cholesterol liquid crystal display screen adopts an active driving mode, an upper electrode is an integrated common electrode, a lower electrode comprises a plurality of pixel electrodes, each pixel electrode is connected with a TFT (thin film transistor) device, the TFT devices are controlled by an electric switch, and a display unit is formed in the intersection area of the common electrode and the pixel electrode; the upper drive control line is a Vcom line, the lower drive control line comprises a scanning line and a data line, and a transverse connecting line is arranged in a gap between the display units along the horizontal direction; one end of the Vcom line is electrically connected with the drive chip outside the display area, and the other end of the Vcom line is electrically connected with the common electrode through an outer vertical connecting line structure outside the display area; one end of the scanning line and the data line is electrically connected with the driving chip outside the display area, the other end of the scanning line and the data line is arranged in the display area, one group of driving control lines is electrically connected with the pixel electrode through the inner vertical connecting line structure and the transverse connecting line and the TFT device pin at the same horizontal position, and the other group of driving control lines is electrically connected with the pixel electrode through the TFT device pin at the same vertical position.

4. The narrow bezel structure of a cholesteric liquid crystal display as claimed in claim 1, wherein: a light shielding strip is arranged in the gap between the adjacent display units along the vertical direction or the horizontal direction; or the gaps between the adjacent display units are provided with the light shielding bars along the vertical direction and the horizontal direction.

5. The narrow bezel structure of a cholesteric liquid crystal display as claimed in claim 4, wherein: the shading strip and the lower driving control line in the vertical direction are molded by the same process and metal materials, and are not electrically connected; the shading strips in the horizontal direction are formed by adopting a low-light-transmission resin material or a metal material; when the horizontal shading strip is formed by adopting a metal material, the horizontal shading strip and the lower driving control line are formed by adopting different metal materials respectively and are isolated by utilizing an insulating layer so as to avoid the electrical connection short circuit between the horizontal shading strip and the lower driving control line.

6. The narrow bezel structure of a cholesteric liquid crystal display as claimed in claim 5, wherein: the inner side or the outer side of the conductive frame glue is provided with a grounding ring, and at least one end of the vertical shading strip or the horizontal shading strip is connected with the grounding ring to be electrically connected with a grounding GND signal so as to avoid coupling interference with the upper electrode or the lower electrode.

7. The narrow bezel structure of a cholesteric liquid crystal display panel according to claim 1 or 5, wherein: the insulating layer is made of silicon nitride or silicon oxide or a photosensitive resin film, the thickness of the silicon nitride is 150-500 nm, the thickness of the silicon oxide is 100-450 nm, and the thickness of the photosensitive resin film is 1000-4000 nm.

8. A narrow bezel structure of a cholesteric liquid crystal display panel according to any one of claims 1 to 3, wherein: the driving chip is an upper and lower electrode integrated driving chip, and one end of the upper driving control line and one end of the lower driving control line are respectively connected with the corresponding pins.

9. A narrow bezel structure of a cholesteric liquid crystal display panel according to any one of claims 1 to 3, wherein: the drive chip comprises an upper pole drive chip and a lower pole drive chip which are arranged on the same side of the cholesterol liquid crystal at intervals, one end of an upper drive control line is connected into the upper pole drive chip, and one end of a lower drive control line is connected into the lower pole drive chip.

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