KR20100116031A - Plasma display device - Google Patents
Plasma display device Download PDFInfo
- Publication number
- KR20100116031A KR20100116031A KR1020090034741A KR20090034741A KR20100116031A KR 20100116031 A KR20100116031 A KR 20100116031A KR 1020090034741 A KR1020090034741 A KR 1020090034741A KR 20090034741 A KR20090034741 A KR 20090034741A KR 20100116031 A KR20100116031 A KR 20100116031A
- Authority
- KR
- South Korea
- Prior art keywords
- printed circuit
- plasma display
- electrode
- panel
- sustain
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/20—Constructional details
- H01J11/46—Connecting or feeding means, e.g. leading-in conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2211/00—Plasma display panels with alternate current induction of the discharge, e.g. AC-PDPs
- H01J2211/20—Constructional details
- H01J2211/62—Circuit arrangements
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Description
BACKGROUND OF THE
The plasma display apparatus includes a panel in which a plurality of discharge cells are formed between a rear substrate having a partition wall and a front substrate opposite thereto, and is selectively generated by discharge of the plurality of discharge cells according to an input image signal. A device for displaying an image by causing vacuum ultraviolet rays to emit phosphors.
BACKGROUND OF THE
In general, a plasma display panel generates a discharge by applying a predetermined voltage to electrodes provided in a discharge space, and plasma generated during gas discharge excites a phosphor, thereby displaying an image including a character or a graphic. It is advantageous in that it is easy to thin a plane, provides a wide viewing angle up and down, left and right, and realizes full color and high brightness.
The plasma display apparatus includes a driving circuit that generates signals for driving the panel, and includes connecting members electrically connecting the panel and the driving circuit to supply the generated driving signals to a plurality of electrodes formed on the panel.
For the electrical connection between the panel and the drive circuit, the connection member includes a plurality of electrodes corresponding to and conductive with the plurality of electrodes formed on the panel.
An object of the present invention is to provide a plasma display apparatus capable of improving the stability of driving circuits for supplying a driving signal to a plasma display panel.
A plasma display device according to the present invention includes a plasma display panel having a plurality of electrodes formed thereon; A printed circuit board having a driving circuit configured to generate a driving signal supplied to a first electrode of the plurality of electrodes; And a flexible printed circuit (FPC) having one end connected to the printed circuit board and the other end connected to the panel to electrically connect the driving circuit and the first electrode, wherein the flexible printed circuit includes an electrical signal. And a protective layer covering the copper foil layer and transmitting the copper foil layer, wherein at least a portion of the protective layer is removed to include one or more bent portions.
According to the present invention configured as described above, by allowing the flexible printed circuit to be bent at least one or more times, the reliability of the flexible printed circuit in the narrow space in the plasma display device is secured, the space occupied by the flexible printed circuit is minimized, the plasma display The bezel of the device is effective in slimming down and miniaturization.
Hereinafter, a plasma display device according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view illustrating an embodiment of a structure of a plasma display panel.
As shown in FIG. 1, the plasma display panel includes a
The
Meanwhile, according to the exemplary embodiment of the present invention, the
Between the
The
In addition, when physically connected and formed, the first
The upper
In addition, the
In addition, the
In an embodiment of the present invention, not only the structure of the
Here, in the case of the differential partition wall structure, the height of the
Meanwhile, in one embodiment of the present invention, although the R, G and B discharge cells are shown and described as being arranged on the same line, it may be arranged in other shapes. For example, a Delta type arrangement in which R, G, and B discharge cells are arranged in a triangular shape may be possible. In addition, the shape of the discharge cell may be not only rectangular, but also various polygonal shapes such as a pentagon and a hexagon.
In addition, the
FIG. 2 illustrates an embodiment of an electrode arrangement of a plasma display panel, and a plurality of discharge cells constituting the plasma display panel are preferably arranged in a matrix form as shown in FIG. 2. The plurality of discharge cells are provided at the intersections of the scan electrode lines Y1 to Ym, the sustain electrode lines Z1 to Zm, and the address electrode lines X1 to Xn, respectively. The scan electrode lines Y1 to Ym may be driven sequentially or simultaneously, and the sustain electrode lines Z1 to Zm may be driven simultaneously. The address electrode lines X1 to Xn may be driven by being divided into odd-numbered lines and even-numbered lines, or sequentially driven.
Since the electrode arrangement shown in FIG. 2 is only an embodiment of the electrode arrangement of the plasma panel according to the present invention, the present invention is not limited to the electrode arrangement and driving method of the plasma display panel shown in FIG. 2. For example, a dual scan method in which two scan electrode lines among the scan electrode lines Y1 to Ym are simultaneously scanned is possible. In addition, the address electrode lines X1 to Xn may be driven by being divided up and down or left and right in the center portion of the panel.
3 is a timing diagram illustrating an embodiment of a time division driving method by dividing a frame into a plurality of subfields. The unit frame may be divided into a predetermined number, for example, eight subfields SF1, ..., SF8 to realize time division gray scale display. Each subfield SF1, ... SF8 is divided into a reset section (not shown), an address section A1, ..., A8 and a sustain section S1, ..., S8.
Here, according to an embodiment of the present invention, the reset period may be omitted in at least one of the plurality of subfields. For example, the reset period may exist only in the first subfield or may exist only in a subfield about halfway between the first subfield and all the subfields.
In each address section A1, ..., A8, a display data signal is applied to the address electrode X, and scan pulses corresponding to each scan electrode Y are sequentially applied.
In each of the sustain periods S1, ..., S8, a sustain pulse is alternately applied to the scan electrode Y and the sustain electrode Z to form wall charges in the address periods A1, ..., A8. Sustain discharge occurs in the discharge cells.
The luminance of the plasma display panel is proportional to the number of sustain discharge pulses in the sustain discharge periods S1, ..., S8 occupied in the unit frame. When one frame forming one image is represented by eight subfields and 256 gradations, each subfield in turn has different sustains at a ratio of 1, 2, 4, 8, 16, 32, 64, and 128. The number of pulses can be assigned. In order to obtain luminance of 133 gradations, cells may be sustained by addressing the cells during the
The number of sustain discharges allocated to each subfield may be variably determined according to weights of the subfields according to the APC (Automatic Power Control) step. That is, in FIG. 3, a case in which one frame is divided into eight subfields has been described as an example. However, the present invention is not limited thereto, and the number of subfields forming one frame may be variously modified according to design specifications. . For example, a plasma display panel may be driven by dividing one frame into eight or more subfields, such as 12 or 16 subfields.
The number of sustain discharges allocated to each subfield can be variously modified in consideration of gamma characteristics and panel characteristics. For example, the gray level assigned to subfield 4 may be lowered from 8 to 6, and the gray level assigned to
4 is a timing diagram illustrating an embodiment of a drive signal for driving a plasma display panel.
The subfield is a wall formed by a pre-reset section and a pre-reset section for forming positive wall charges on the scan electrodes Y and negative wall charges on the sustain electrodes Z. It may include a reset section for initializing the discharge cells of the entire screen by using the charge distribution, an address section for selecting the discharge cells, and a sustain section for maintaining the discharge of the selected discharge cells. have.
The reset section includes a setup section and a setdown section. In the setup section, rising ramp waveforms (Ramp-up) are simultaneously applied to all scan electrodes to generate fine discharges in all discharge cells. Thus, wall charges are generated. In the set-down period, a falling ramp waveform (Ramp-down) falling at a positive voltage lower than the peak voltage of the rising ramp waveform (Ramp-up) is simultaneously applied to all the scan electrodes (Y), thereby eliminating discharge discharge in all the discharge cells. Generated, thereby eliminating unnecessary charges during wall charges and space charges generated by the setup discharges.
In the address period, a scan signal having a negative scan voltage Vsc is sequentially applied to the scan electrode, and at the same time, a positive data signal is applied to the address electrode X. The address discharge is generated by the voltage difference between the scan signal and the data signal and the wall voltage generated during the reset period, thereby selecting the cell. On the other hand, in order to increase the efficiency of the address discharge, a sustain bias voltage Vzb is applied to the sustain electrode during the address period.
During the address period, the plurality of scan electrodes Y may be divided into two or more groups, and scan signals may be sequentially supplied to each group, and each of the divided groups may be further divided into two or more subgroups and sequentially by the subgroups. Scan signals can be supplied. For example, the plurality of scan electrodes Y is divided into a first group and a second group, and scan signals are sequentially supplied to scan electrodes belonging to the first group, and then scan electrodes belonging to the second group Scan signals may be supplied sequentially.
According to an embodiment of the present invention, the plurality of scan electrodes Y may be divided into a first group located at an even number and a second group located at an odd number according to a position formed on a panel. In another embodiment, the panel may be divided into a first group positioned above and a second group positioned below the center of the panel.
The scan electrodes belonging to the first group divided by the above method are further divided into a first subgroup located at an even number and a second subgroup located at an odd number, or It may be divided into a first subgroup located above and a second group located below based on the center of the group.
In the sustain period, a sustain pulse having a sustain voltage Vs is alternately applied to the scan electrode and the sustain electrode to generate sustain discharge in the form of surface discharge between the scan electrode and the sustain electrode.
The width of the first sustain signal or the last sustain signal among the plurality of sustain signals alternately supplied to the scan electrode and the sustain electrode in the sustain period may be greater than the width of the remaining sustain pulses.
After the sustain discharge occurs, an erase period for erasing the wall charge remaining in the scan electrode or the sustain electrode of the selected ON cell in the address period by generating a weak discharge may be further included after the sustain period.
The erase period may be included in all or some of the plurality of subfields, and the erase signal for the weak discharge is preferably applied to the electrode to which the last sustain pulse is not applied in the sustain period.
The cancellation signal is a ramp-type signal that gradually increases, a low-voltage wide pulse, a high-voltage narrow pulse, an exponential signal, or half Sinusoidal pulses can be used.
In addition, a plurality of pulses may be sequentially applied to the scan electrode or the sustain electrode to generate the weak discharge.
The driving waveforms shown in FIG. 4 are exemplary embodiments of signals for driving the plasma display panel according to the present invention, and the present invention is not limited to the waveforms shown in FIG. 4. For example, the pre-reset period may be omitted, and the polarity and the voltage level of the driving signals illustrated in FIG. 4 may be changed as necessary. After the sustain discharge is completed, an erase signal for erasing wall charge may be applied to the sustain electrode. May be authorized. In addition, the single sustain driving may be performed by applying the sustain signal to only one of the scan electrode (Y) and the sustain (Z) electrode to generate a sustain discharge.
FIG. 5 illustrates an embodiment of a configuration of a driving apparatus for driving a plasma display panel.
Referring to FIG. 5, the
On the PCB, an
The
The
In the
As illustrated in FIG. 5, the
The
The
The sustain
The driving
In the case of the plasma display device according to the present invention, the driving signal output from the
The connecting
As shown in FIG. 5, the connecting
In addition, in order to supply a drive signal to the sustain electrode or the address electrode of the panel, a connection member as described above is provided between the sustain
6 is a simplified illustration in perspective view of a flexible printed circuit (FPC).
The flexible printed circuit (FPC) 100 includes a
The first electrode may be at least one of a scan electrode and a sustain electrode. Here, a flexible printed circuit FPC connecting the scan electrode and the printed circuit board PCB on which the
The plurality of lines formed on the
Although not shown in FIG. 6, a plurality of lines formed in the
FIG. 7 schematically illustrates a configuration of a flexible printed circuit connecting an electrode formed on a printed circuit board and a plasma display panel.
Referring to FIG. 7, the plasma display panel includes an
In addition, the back surface of the
One end of the flexible printed circuit (FPC) 100 is connected to the printed circuit board (PCB) 250 on which the
The flexible printed circuit (FPC, 100) has the advantage of its flexibility, but it is difficult to accurately predict the degree of bending of the flexible printed circuit (FPC, 100), there is a problem that the degree is not constant during assembly, the bending during the assembly process Depending on the degree, there is a possibility that damage may occur when fastening other parts.
In addition, there is a limit in applying a narrow bezel structure that minimizes the width of the screen border by the width B1 of the flexure of the flexible printed circuit (FPC) 100 as shown in FIG. 7.
8 is a view showing embodiments of the configuration of a flexible printed circuit (FPC) according to the present invention, Figure 9 is a flexible printed circuit connecting the electrode formed on the printed circuit board and the plasma display panel according to the present invention The configuration of the circuit is briefly shown. The above description and the north and south parts will be briefly or omitted.
A plasma display device according to the present invention includes a plasma display panel having a plurality of electrodes formed thereon; A printed circuit board having a driving circuit configured to generate a driving signal supplied to a first electrode of the plurality of electrodes; And a flexible printed circuit (FPC) having one end connected to the printed circuit board and the other end connected to the panel to electrically connect the driving circuit and the first electrode.
The flexible printed circuit includes a copper foil layer for transmitting an electrical signal and a protective layer covering the copper foil layer, and at least a portion of the protective layer includes one or more bent portions formed by removing the protective layer.
In addition, the bent portion may be two, and the flexible printed circuit may be folded around the bent portion.
In addition, the first electrode may be at least one of a sustain electrode and a scan electrode.
Referring to FIG. 8, the flexible printed circuit (FPC) may include at least one bent portion, and more preferably two
The
If you look briefly at the manufacturing process of flexible printed circuits, you first cut the copper foil according to the product arrangement. Holes required for the product are processed, and copper plating is performed for electrical conduction to the inner walls of the holes.
After the process of imaging and exposing the circuit to be formed, the process of development, etching and peeling is performed.
Then, a portion of the cover layer is bent to bend to form a bent portion, a protective layer and an insulating layer are attached, or a protective layer is directly formed without a part of the cover layer. Can be formed.
After curing at high temperature and pressure, various quality checks are carried out.
The width W1 of the connection part of the flexible printed circuit may vary according to the structure required by the panel, and may be formed to be the same as or different from the width W2 of the connection part of the other side.
The widths d1 and d2 of the
Also, if the width of the bent portion is too large. This is because by forming a polygonal folded structure more than the 'c' shape, it may not achieve the purpose of the present application to reduce the bezel size.
In addition, the distance d3 between the
In addition, the bent portion may be filled with a high elastic resin (flexible resin). The flexible printed circuit may be fastened in a bent structure by forming the bent portion, but a high elastic resin such as a flexible epoxy resin may be filled to perform both the role of the protective layer and the bent portion.
FIG. 9 schematically illustrates a configuration of a flexible printed circuit connecting an electrode formed on a printed circuit board and a plasma display panel according to the present invention.
Referring to FIG. 9, the plasma display panel includes an
In addition, the back surface of the
As shown in FIG. 9, the flexible printed circuit (FPC) according to the present invention is fastened in a bent structure by the
In the above description, the configuration of the flexible printed circuit connecting the scan electrode lines and the printed circuit board (PCB) on which the
In this case, since the signal applied to each scan electrode varies according to the image data, a pattern corresponding to the scan electrode is formed in the FPC connecting the scan electrodes, and the sustain electrodes are connected in common so that the same voltage is applied to all the sustain electrodes. Since it is applied at the same time, the FPC connecting the sustain drive board and the sustain electrode may be a thin copper plate formed on the entire surface of the FPC without the electrode pattern.
10 is a diagram illustrating embodiments of a configuration of a flexible printed circuit (FPC) according to the present invention.
The flexible printed circuit may have a single-sided or double-sided structure, and (a) shows a single-sided structure and (b) shows a double-sided structure.
Referring to FIG. 10A, a copper clad laminate (CCL) may include a
In addition, the protective layer covers and protects the exposed portions of the copper foil layer. The protective layer may be, for example, a flexible film such as a polyimide film, and may include an
In addition, as shown in FIG. 10B, in the double-sided structure, the copper foil layer CCL is formed of the
According to the present invention, by allowing the flexible printed circuit to be bent at least once, the reliability of the flexible printed circuit is secured in a narrow space in the plasma display device, the space occupied by the flexible printed circuit is minimized, and the bezel of the plasma display device is minimized. This has the effect of slimming and miniaturization.
Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Accordingly, modifications of the embodiments of the present invention will not depart from the scope of the present invention.
1 is a perspective view illustrating an embodiment of a structure of a plasma display panel.
2 is a diagram illustrating an embodiment of an electrode arrangement of a plasma display panel.
FIG. 3 is a timing diagram illustrating an embodiment of a method of time-divisionally driving a plasma display panel by dividing one frame into a plurality of subfields.
4 is a timing diagram illustrating an embodiment of a waveform of a driving signal for driving a plasma display panel.
5 is a diagram illustrating an embodiment of a configuration of a driving apparatus for driving a plasma display panel.
6 is a perspective view briefly illustrating a configuration of a flexible printed circuit (FPC).
FIG. 7 schematically illustrates a configuration of a flexible printed circuit connecting an electrode formed on a printed circuit board and a plasma display panel.
8 is a diagram illustrating embodiments of a configuration of a flexible printed circuit (FPC) according to the present invention.
FIG. 9 schematically illustrates a configuration of a flexible printed circuit connecting an electrode formed on a printed circuit board and a plasma display panel according to the present invention.
10 is a diagram illustrating embodiments of a configuration of a flexible printed circuit (FPC) according to the present invention.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020090034741A KR20100116031A (en) | 2009-04-21 | 2009-04-21 | Plasma display device |
Applications Claiming Priority (1)
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KR1020090034741A KR20100116031A (en) | 2009-04-21 | 2009-04-21 | Plasma display device |
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KR20100116031A true KR20100116031A (en) | 2010-10-29 |
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KR1020090034741A KR20100116031A (en) | 2009-04-21 | 2009-04-21 | Plasma display device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9164335B2 (en) | 2012-06-18 | 2015-10-20 | Samsung Display Co., Ltd. | Display panel and method of manufacturing the same |
-
2009
- 2009-04-21 KR KR1020090034741A patent/KR20100116031A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9164335B2 (en) | 2012-06-18 | 2015-10-20 | Samsung Display Co., Ltd. | Display panel and method of manufacturing the same |
USRE47701E1 (en) | 2012-06-18 | 2019-11-05 | Samsung Display Co., Ltd. | Display panel and method of manufacturing the same |
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