JP5050345B2 - Plasma display panel - Google Patents

Description

  The invention according to the present patent application (hereinafter referred to as “the present invention”) relates to a plasma display panel (hereinafter referred to as “panel”) used in a plasma display device which is one of flat display devices.

  An AC surface discharge type panel, which is one of the typical forms as a panel, has a large number of discharge cells formed between a front plate and a back plate arranged to face each other. In the front plate, a plurality of pairs of display electrodes made up of a pair of scan electrodes and sustain electrodes are formed on the front glass substrate in parallel with each other, and a dielectric layer and a protective layer are formed so as to cover the display electrodes. The back plate has a plurality of parallel data electrodes on the back glass substrate, a dielectric layer so as to cover them, and a plurality of partition walls formed in parallel to the data electrodes on each of the dielectric layers. A phosphor layer is formed on the side surface of the partition wall. Then, the front plate and the back plate are arranged opposite to each other so that the display electrode and the data electrode are three-dimensionally crossed and sealed, and a discharge gas is sealed in the internal discharge space. Here, a discharge cell is formed at a portion where the display electrode and the data electrode face each other. In the panel having such a configuration, ultraviolet light is generated by gas discharge in each discharge cell, and phosphors of RGB colors are excited and emitted by the ultraviolet light to perform color display.

  As a method of driving the panel, a subfield method, that is, a method of performing gradation display by combining subfields to emit light after dividing one field period into a plurality of subfields. Each subfield has an initialization period, a writing period, and a sustain period. During the initializing period, initializing discharge is performed in the discharge cells, the history of wall charges for individual previous discharge cells is erased, and wall charges necessary for the subsequent writing operation are formed. In the subsequent writing period, a scanning pulse is sequentially applied to the scanning electrodes, and a writing pulse corresponding to an image signal to be displayed is applied to the data electrodes, thereby selectively causing a writing discharge between the scanning electrodes and the data electrodes. , Selective wall charge formation. In the sustain period, a predetermined number of sustain pulses corresponding to the luminance weight are applied between the scan electrodes and the sustain electrodes, and the discharge cells in which the wall charges are formed by the write discharge are selectively discharged to emit light.

Here, in order to display an image correctly, it is important to reliably perform selective write discharge in the write period. However, the write discharge is easily affected by the dimensional accuracy of each electrode, There are many factors that make the discharge unstable, such as the fact that the phosphor layer formed on the substrate makes it difficult for the discharge to occur. To deal with these problems, for example, Patent Document 1 discloses an example of a panel that reduces the power consumption by devising the shape of the data electrode and performing the writing operation reliably in a short time.
Japanese Patent Application Laid-Open No. 2000-100360

  However, in the future, as the size of the panel increases, so does the definition. As a result, it becomes increasingly difficult to accurately manufacture discharge cells over the entire surface of the panel. In the above-described conventional technology, when the data electrode shape is designed to stabilize the discharge without being greatly affected by the dimensional accuracy of each electrode, the power consumption increases, and conversely, the data electrode does not increase the power consumption. When the shape is adopted, there is a problem that the discharge becomes unstable due to the influence of the dimensional accuracy of the electrode.

  The present invention has been made in view of these problems, and provides a panel capable of stably writing and discharging over the entire display screen while suppressing an increase in power consumption even for a large and high-definition panel. The purpose is to do.

The plasma display panel according to claim 1 of the present patent application includes a plurality of pairs of display electrodes each including a scan electrode and a sustain electrode arranged in parallel to each other on a first substrate, and a discharge space in the first substrate. A plasma display panel comprising a plurality of data electrodes arranged in a direction orthogonal to the display electrodes on a second substrate disposed opposite to each other, the electrode width of the data electrodes being at the center of each electrode There is a taper part where the electrode width gradually increases toward the both ends in the both end sides of the center part, and is constant at both end sides further than the taper part. It differs depending on the color of light whose emission is controlled by the electrodes.

  With such a configuration, the voltage applied to the data electrodes can be made uniform to suppress the power consumption of the entire screen, and the occurrence of missing pixels due to non-discharge can be prevented. In addition, since the discharge characteristics change stepwise, no discontinuous change occurs in the display screen.

The plasma display panel according to claim 2 according to the present patent application includes a plurality of pairs of display electrodes each including a scan electrode and a sustain electrode arranged in parallel to each other on a first substrate, and a discharge space in the first substrate. A plasma display panel comprising a plurality of data electrodes arranged in a direction orthogonal to the display electrodes on a second substrate arranged opposite to each other, the electrode width of the data electrodes being set on the inner side of the plasma display panel What is arranged is constant, what is arranged on the outer side becomes wider stepwise toward both outer sides of the plasma display panel, and what is arranged on both outer sides of the plasma display panel becomes wider. The electrode width of the data electrode differs depending on the color of light whose emission is controlled by each data electrode.

  Also with such a configuration, it is possible to prevent pixel loss due to non-discharge while suppressing power consumption of the entire screen by making the voltage applied to the data electrodes uniform.

The plasma display panel according to claim 3 of the present patent application includes a plurality of pairs of display electrodes each including a scan electrode and a sustain electrode arranged in parallel to each other on a first substrate, and a discharge space in the first substrate. A plasma display panel comprising a plurality of data electrodes arranged in a direction orthogonal to the display electrodes on a second substrate arranged opposite to each other, the electrode width of the data electrodes being set on the inner side of the plasma display panel What is arranged is constant, and what is arranged on the outer side has an electrode width that gradually increases in the center part and the taper part of each electrode toward both outer sides of the plasma display panel. Further, those arranged on both outer sides are constant in the widened state, and the electrode width of the data electrode is the light whose emission is controlled by each data electrode. Different depending on the color.

  Also with such a configuration, it is possible to prevent pixel loss due to non-discharge while suppressing power consumption of the entire screen by making the voltage applied to the data electrodes uniform. In addition, since the discharge characteristics change stepwise, no discontinuous change occurs in the display screen.

In the plasma display panel according to claim 4 of the present patent application, the electrode width of the data electrode is the same for the blue and green data electrodes for controlling the light emission, and the color of the light for controlling the light emission. In the red data electrode, the color of light for controlling light emission is narrower than that of the blue and green data electrodes.

  With such a configuration, it is possible to improve the characteristics of red pixels having particularly different discharge characteristics while suppressing the power consumption of the entire screen by making the voltage applied to the data electrodes uniform.

  According to the present invention, it is possible to provide a panel that is a large and high-definition panel and that can stably write and discharge over the entire display screen while suppressing an increase in power consumption.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an exploded perspective view showing the structure of the panel according to the first embodiment of the present invention. Transparent electrodes 102a and 103a constituting scanning electrodes 102 and sustain electrodes 103 as display electrodes are formed on front glass substrate 105, which is the first substrate, and auxiliary electrodes 102b and 103b are formed thereon. . A dielectric layer 106 is formed on the front glass substrate 105 so as to cover the transparent electrodes 102a and 103a and the auxiliary electrodes 102b and 103b.

  The dielectric layer 106 can be formed by, for example, applying a glass paste using a die coating method or the like and then baking it. Then, a protective layer 107 is formed on the dielectric layer 106. The protective layer 107 can be formed using, for example, a film forming process of magnesium oxide by a vacuum evaporation method or the like. Thus, the front plate 101 is configured by forming the scan electrode 102, the sustain electrode 103, the dielectric layer 106, and the protective layer 107 on the front glass substrate 105.

  Data electrodes 110 are formed in a stripe pattern on the back glass substrate 108 which is the second substrate. Details of the shape of the data electrode 110 will be described later.

  The data electrode 110 can be formed by, for example, applying a photosensitive Ag paste by a screen printing method or the like, then patterning and baking by a photolithography method or the like.

  A base dielectric layer 109 is formed so as to cover the data electrode 110. The underlying dielectric layer 109 can be formed, for example, by applying a glass paste by screen printing and firing. A stripe-shaped or cross-shaped partition wall 111 is formed on the base dielectric layer 109.

The partition wall 111 is formed, for example, by forming a photosensitive paste mainly composed of an aggregate such as Al ₂ O ₃ and glass frit by a screen printing method or a die coating method, patterning by a photolithography method, and baking. can do. Alternatively, it may be formed by repeatedly applying a paste containing a glass material at a predetermined pitch by a screen printing method or the like and then baking it.

  In the grooves formed between the barrier ribs 111, phosphor layers 112 that emit light of green, red, and blue are formed. This can be formed, for example, by applying a phosphor ink containing phosphor particles and an organic binder, followed by baking.

  Therefore, each data electrode 110 controls light emission of any one of green, red, and blue, and the data electrodes 110 that control green, red, and blue are repeatedly arranged in this order. Yes. However, this order is an example, and this order is not necessarily required.

  In this way, the back plate 104 is configured by forming the data electrode 110, the base dielectric layer 109, the partition wall 111, and the phosphor layer 112 that control the emission of each color on the back glass substrate 108.

  A low-melting glass frit is applied to the peripheral portion of the back plate 104 and dried. The back plate 104 and the front plate 101 are arranged to face each other, heat-treated, and sealed.

  The discharge space 114 formed between the front plate 101 and the back plate 104 is evacuated to a high vacuum, and then a discharge gas such as neon or xenon is sealed to complete the panel 100.

  FIG. 2 is an electrode array diagram of the panel 100. M columns of data electrodes 110 are arranged in the column direction, and n rows of scan electrodes 102 and n rows of sustain electrodes 103 are alternately arranged in the row direction.

  In addition, m × n discharge cells 115 including a pair of scan electrodes, sustain electrodes, and one data electrode are formed in the discharge space 114. When the panel 100 is a 50 inch wide XGA type (1366 × 768 pixels) panel 100, m = 1366 × 3 (three colors of red, blue, and green) and n = 768.

  Next, a driving voltage waveform for driving panel 100 and its timing will be described. In the present embodiment, one field period is described as being composed of a plurality of subfields having an initialization period, a writing period, and a sustain period. However, other subfield structures may be used.

  FIG. 3 is a waveform diagram of the drive voltage applied to each electrode of panel 100. In the initialization period, the data electrode 110 and the sustain electrode 103 are held at the ground potential, and a ramp waveform voltage that gradually increases is applied to the scan electrode 102. Thereafter, the sustain electrode 103 is maintained at a positive voltage, and a ramp waveform voltage that gradually falls is applied to the scan electrode 102. During this time, two weak initializing discharges occur in the discharge cell 115, and the wall voltage on the scan electrode 102 and the wall voltage on the sustain electrode 103 are lowered.

  Further, a positive wall voltage Vw suitable for the write operation is accumulated on the data electrode 110. Here, the wall voltage on the electrode means a voltage generated by wall charges accumulated on the base dielectric layer 109 and the phosphor layer 112 covering the electrode. As described above, the history of the wall voltage for the individual discharge cells before that is erased, and the initialization operation for forming the wall voltage necessary for the subsequent write discharge is completed.

  In the write period, a positive write pulse voltage Vd is applied to the data electrode 110 corresponding to the discharge cell 115 to be displayed, and a negative scan pulse voltage Va is applied to the corresponding scan electrode 102. Accordingly, the voltage difference at the intersection between the upper portion of the data electrode 110 and the upper portion of the scan electrode 102 of the discharge cell 115 to which the write pulse voltage Vd and the scan pulse voltage Va are simultaneously applied is the write pulse voltage Vd and the scan pulse voltage Va, respectively. The positive wall voltage Vw at the top of the data electrode 110 is added to the sum of the absolute values of the above and exceeds the discharge start voltage. Then, a discharge is generated between data electrode 110 and scan electrode 102 and progresses to a discharge between sustain electrode 103 and scan electrode 102. As a result, positive wall voltage is accumulated on scan electrode 102, and negative wall voltage is accumulated on sustain electrode 103 and data electrode 110. On the other hand, no writing discharge occurs in the discharge cells 115 to which the writing pulse voltage Vd and the scanning pulse voltage Va are not applied simultaneously. Such an address operation is performed in all the discharge cells 115, and the address period ends.

  In the sustain period, the positive sustain pulse voltage Vs is alternately applied to the scan electrode 102 and the sustain electrode 103 to maintain the discharge cell 115 in which the write discharge has occurred for the number of times corresponding to the weighting by the luminance. Discharging is continuously performed. On the other hand, the sustain discharge does not occur in the discharge cell 115 in which the write discharge has not occurred.

  The same operation is continuously performed in the subsequent subfields.

  Next, the detailed shape of the data electrode 110 formed on the rear glass substrate 108 will be described.

  FIG. 4 shows an outline of the arrangement of the data electrodes 110 constituting the panel 100 in the present embodiment.

  The panel 100 is roughly divided into a peripheral portion outside the square indicated by the broken line and an inner portion surrounded by the peripheral portion inside the square indicated by the broken line. This inner portion is a display area 100a, and the plasma display apparatus according to the present embodiment displays an image in this display area 100a. Usually, the size of the plasma display apparatus is referred to as “how many inches”. It is the length of the diagonal line of this display area 100a.

  A non-display area 100b exists outside the display area 100a. The data electrode 110 also exists in the non-display area 100b, and there are also lead lines and the like for connecting to the data electrode 110. However, since the display area 100a is directly related to the essence of the present invention, only the display area 100a will be described below.

  Therefore, the following description relates to the data electrode 110 in the display area 100a.

  As an example, assume that the panel 100 is a panel 100 of a 50 inch wide XGA type (1366 × 768 pixels). In this panel 100, the number of display pixels is horizontal m = 1366 and vertical n = 768. The data electrode 110 is wired in the vertical direction, and the data electrode 110 is prepared with 1366 × 3 pixels (for each color of red, blue, and green) in the horizontal direction. The data electrode 110 for controlling green light emission is called a data electrode 121, the data electrode 110 for controlling red light emission is called a data electrode 122, and the data electrode 110 for controlling blue light emission is a data electrode. 123. The three data electrodes 110 constitute one pixel, and a set of the three data electrodes 110 is prepared for the number of pixels in the horizontal direction (1366).

  Note that the size, type, number of pixels, wiring direction, number of data electrodes, and the like of the panel 100 are merely examples for specific description, and the present invention is not limited thereto (in this specification, The same is true for all explanations.)

  The data electrode 110 having 1366 × 3 pixels prepared in the left-right direction can be roughly divided into an X region, a Y region, and a Z region, as shown in FIG.

  The X region is located inside the panel 100, and the width of each data electrode 110 is constant in this region. However, the width and shape of the data electrode 110 are different corresponding to the color for controlling the light emission. This will be described in detail later.

  In this specification, the inner portion and the outer peripheral portion of the panel 100 are referred to as “inner side (portion)” and “outer side (portion)”. The internal part is distinguished from the end part by referring to “center (part)” and “both ends (part / side)”.

  The Y region is located on the left and right and both outer sides of the X region, and in this region, the width of each data electrode gradually increases stepwise. Further, the state of widening in stages is different in the L region, M region, and N region of each data electrode 110 described later, and is different depending on the color for controlling the light emission. This will also be described in detail later.

  The Z region is located further to the left and right and both outside of the Y region, and is located on the outermost side of the panel 100. In this region, the width of each data electrode becomes constant again. However, the width and shape of the data electrode 110 are different corresponding to the color for controlling the light emission. This will be described in detail later.

  As shown in FIG. 4, each of the data electrodes 110 can be divided into an L region, an M region, and an N region.

  The L region is located at the center of the data electrode 110, and the width of the data electrode 110 is constant in this region. However, the width of the data electrode 110 differs depending on the color for controlling light emission. This will be described in detail later.

  The M region is located above and below and both ends of the L region, and in this region, the width of the data electrode gradually increases in steps. Further, the state of widening in stages is different in the X region, the Y region, and the Z region where the respective data electrodes 110 exist, and is different depending on the color for controlling the light emission. This will also be described in detail later.

  The N region is located further on the upper and lower ends and both ends of the M region, and is located on the most ends of the data electrode 110. In this region, the width of each data electrode becomes constant again. However, the width of the data electrode 110 differs depending on the color for controlling light emission. This will be described in detail later.

  It should be noted that the shape of the panel 100, the number and shape of the data electrodes 110, the arrangement, the structure, etc. shown in FIG. 4 are schematically shown, and the present invention is not limited to this shape, arrangement, structure, etc. Absent.

  For example, the number of data electrodes 110 included in the X region is 85.0-99.4% of the entire data electrode, and the number of data electrodes 110 included in the Y region is 0.3-5. The number of data electrodes included in the Z region can be 0.3 to 10.0% of the entire data electrodes. However, the present invention is not limited to this range.

  Alternatively, for example, the number of data electrodes 110 included in the X region is 95 to 98% of the entire data electrode, the number of data electrodes 110 included in the Y region is 1 to 2% of the entire data electrode, and the Z region The number of data electrodes included in the data electrodes may be 1 to 3% of the entire data electrodes. However, the present invention is not limited to this range.

  In addition, for example, the number of data electrodes 110 included in the X region is 1266 to 1358 for each of the colors that control light emission of red, blue, and green, and the number of data electrodes 110 included in the Y region is The number of data electrodes included in the Z region is red, blue, or green, and the number of data electrodes included in the Z region is 4 to 40 for each of the colors that control the emission of red, blue, and green. It can be 4 to 60 for each. However, the present invention is not limited to this range.

  Alternatively, for example, the number of data electrodes 110 included in the X region is 1296 to 1336 for each of red, blue, and green colors that control light emission, and the number of data electrodes 110 included in the Y region is The number of data electrodes included in the Z area is 10 to 30 for each of red, blue, and green that controls the light emission, and the color that controls the light emission is red, blue, and green. There may be 20 to 40 for each. However, the present invention is not limited to this range.

  Next, in order to explain in more detail the width of the data electrode 110 described above, the data electrodes included in the N region, M region, and L region in the downward direction from the upper end of the inner portion (X region) of the panel 100. FIG. 5 shows an enlarged view of a part of 110.

  5 shows the N region, the M region, and the L region in the downward direction from the upper end of the inner side portion (X region) of the panel 100. Therefore, the broken line of the horizontal double arrow shown in the upper part of FIG. This is the boundary between 100a and the non-display area 100b. Below this boundary line is the display area 100a of the panel 100, and above this boundary line is the non-display area 100b of the panel 100 although not shown.

  The data electrode 110 is extended also in the non-display area 100b, and is used as a connection portion with a lead line, a control circuit, etc., but the data electrode 110 in the non-display area 100b is not directly related to the present invention. For simplicity, illustration is omitted.

  5 shows only the X region of the panel 100, the width and shape of each data electrode 110 differ depending on the color that the data electrode 110 controls the light emission. Are the same.

  As shown in FIG. 4, each data electrode 110 shown in FIG. 5 is divided into an L region, an M region, and an N region. Actually, there is an M region again below the L region shown in the lower right side of FIG. 5, and there is an N region again below the L region. However, these are omitted for convenience of space.

  As described above, the L region is located at the center of the data electrode 110, and the width of the data electrode 110 is constant in this L region. The M region is located on both ends of the L region, and in this M region, the width of the data electrode is gradually increased. The N region is located further on both ends of the M region, and in this N region, the width of each data electrode becomes constant again.

  For example, the length of each N region is 30 mm ± 10 mm (60 mm ± 20 mm when both ends are combined), the length of each M region is 20 mm ± 10 mm (40 mm ± 20 mm when both ends are combined), and the L region If the display size of the panel 100 is 50 inches, for example, 523 mm ± 40 mm. However, the present invention is not limited to this range.

  Alternatively, for example, the length of each N region is 5% ± 2% of the total length of the data electrode 110 (10% ± 4% when both ends are combined), and the length of each M region is the length of the data electrode 110. The total length is 3% ± 2% (6% ± 4% when both ends are combined), and the length of the L region is the remainder. However, the present invention is not limited to this range.

  As described above, in the L region, the width of each data electrode 110 is constant, and the value is as follows for the data electrode 121 whose light emission control color is green and the data electrode 123 whose light emission control color is blue. , 100 μm. On the other hand, the data electrode 122 whose light emission control color is red is 90 μm. In this way, the data electrode 121 whose light emission control color is green and the data electrode 123 whose light emission control color is blue are the same, and the data electrode 122 whose light emission control color is red are the same. Is also narrow, 80 to 99%, or 88 to 92%. However, the present invention is not limited to this range.

  Similarly, in the N region, the width of each data electrode 110 is constant, and the value is the same for the data electrode 121 whose light emission control color is green and the data electrode 123 whose light emission control color is blue. 130 μm. On the other hand, the data electrode 122 whose light emission control color is red is set to 100 μm. In this way, the data electrode 121 whose light emission control color is green and the data electrode 123 whose light emission control color is blue are the same, and the data electrode 122 whose light emission control color is red are the same. Is also narrow, 65 to 99%, or 68 to 80%. However, the present invention is not limited to this range.

  As described above, in the M region, the data electrodes 110 having different widths are connected step by step from the L region, which is the center of the data electrode 110, to the N region, which is the both sides. .

  Next, in order to describe the width of the data electrode 110 in more detail, an N region, an M region, a downward N region from the upper end of the left outer portion of the panel 100 (a portion extending from the Z region to the X region through the Y region), FIG. 6 shows an enlarged view of a part of the data electrode 110 included in the L region.

  FIG. 6 shows only the left outer portion of the panel 100. In fact, on the right side, there is a portion from the X region inside the panel 100 to the outermost Z region through the Y region. Exists. However, since these are the same as those on the left side, illustration and description are omitted.

  FIG. 6 shows an N region, an M region, and an L region in the downward direction from the upper end of the left outer portion of the panel 100 (portion extending from the Z region to the Y region through the Y region). A broken line indicated by a right-pointing arrow and a broken line indicated by a downward-pointing arrow shown in the left part of FIG. The lower right side of the boundary line is the display area 100a of the panel 100, and the upper side and the left side of the boundary line are the non-display area 100b of the panel 100 although not shown.

  Although the data electrode 110 is extended also to the non-display area 100b, illustration is omitted for simplification.

  Further, as shown in FIG. 4, each data electrode 110 shown in FIG. 6 is divided into an L region, an M region, and an N region, respectively. Actually, there is an M region again below the L region shown in the lower right side of FIG. 6, and there is an N region again below the L region. However, these are omitted for convenience of space.

  The X region is shown on the rightmost side of FIG. As described above, in the X region, the width of the data electrode 110 is different from the width and shape corresponding to the color for controlling light emission. However, if the colors for controlling light emission are the same, the width and shape of each data electrode 110 are constant. In the X area of FIG. 6, one data electrode 123 whose light emission control color is blue, one data electrode 122 whose light emission control color is red, and data whose light emission control color is green Only one electrode 121 is shown. The X region further exists on the right side, and there are data electrodes 110 having the same width and shape as these data electrodes 110, but these are not shown.

  The Y region is shown in the middle of FIG. In the Y region, the width and shape of the data electrode 110 are different corresponding to the color for controlling light emission, and further, the width gradually increases from the center of the panel 100 toward the outer side. Yes. That is, in the Y region, the width of the data electrode 110 is different from the width and shape corresponding to the color for controlling light emission, and at the same time, from the side closer to the X region to the side closer to the Z region, that is, If it says in FIG. 6, it will become large in steps from the right direction to the left direction.

  For example, the data electrode 110 present on the right side of the Y region, that is, adjacent to the X region is the data electrode 131 whose light emission control color is green, and the width of the data electrode 131 exists in the X region. Compared with the data electrode 121 whose color for controlling the emitted light is green, it is 3 μm wider in the L region and 103 μm. Similarly, in the N region, it is 130 μm as compared with the data electrode 121 in the X region, and in the M region, it gradually increases from 103 μm to 130 μm.

  On the left side of the data electrode 131 is a data electrode 132 whose color for controlling light emission is red. The data electrode 132 is a data electrode 132 having a red color for controlling light emission existing on the rightmost side of the Y region. The width of the data electrode 132 is 91 μm, which is 1 μm wider in the L region than the data electrode 122 whose light emission controlling color existing in the X region is red. Similarly, it is 100 μm in the N region as compared with the data electrode 122 in the X region, and is gradually increased from 91 μm to 100 μm in the M region.

  Similarly, on the left side of the data electrode 132 is a data electrode 133 whose color for controlling light emission is blue. The data electrode 133 is a data electrode 133 that is present on the rightmost side of the Y region and has a blue color for controlling light emission. The width of the data electrode 133 is 103 μm, which is 3 μm wider in the L region than the data electrode 123 whose color for controlling light emission existing in the X region is blue. Similarly, in the N region, it is 130 μm as compared with the data electrode 123 in the X region, and in the M region, it gradually increases from 103 μm to 130 μm. The width and shape of the data electrode 133 are the same as those of the data electrode 131 whose color for controlling the light emission existing at the right end of the Y region is green.

  In this way, in the Y region, the width of each data electrode is from the X region toward the Z region, and in the L region, the data electrode whose color for controlling light emission is green and the color for controlling light emission are The data electrode that is blue increases by 3 μm, and the data electrode that controls light emission is red by 1 μm.

  In the N region, the width of the data electrode in the X region, which has the same color for controlling light emission, is the same.

  In the M region, the width gradually increases from the L region toward the N region so as to connect the data electrode in the L region and the data electrode in the N region.

  In FIG. 6, in the Y region, there are 9 data electrodes each having a green color for controlling light emission, 9 data electrodes having a red color for controlling light emission, and 9 data electrodes having a blue color for controlling light emission. It is assumed that it exists.

  Therefore, as described above, if the width of each data electrode increases from the X region to the Z region in the Y region, the color that controls the light emission existing on the leftmost side of the Y region. The width of the data electrode 134 whose green is green is wider (3 μm × 9) in the L region and becomes 127 μm than the data electrode 121 whose color for controlling light emission existing in the X region is green. Similarly, it is 130 μm in the N region as compared with the data electrode 121 in the X region, and is gradually increased from 127 μm to 130 μm in the M region.

  Adjacent to the left side of the data electrode 134 is a data electrode 135 whose color for controlling light emission is red. The data electrode 135 is a data electrode 135 that has a red color for controlling light emission existing on the leftmost side of the Y region. The width of the data electrode 135 is 99 μm, which is wider (1 μm × 9) in the L region than the data electrode 122 whose color for controlling light emission existing in the X region is red. Similarly, in the N region, it is 100 μm as compared with the data electrode 122 in the X region, and in the M region, it gradually increases from 99 μm to 100 μm.

  Similarly, on the left side of the data electrode 135, there is a data electrode 136 whose color for controlling light emission is blue. The data electrode 136 is a data electrode 136 that is blue on the left side of the Y region and controls the light emission. The width of the data electrode 136 is 127 μm, which is wider (3 μm × 9) in the L region than the data electrode 123 whose color for controlling light emission existing in the X region is blue. Similarly, it is 130 μm in the N region as compared with the data electrode 123 in the X region, and is gradually increased from 127 μm to 130 μm in the M region.

  The Z region is shown on the leftmost side of FIG. In the Z region, the width and shape of the data electrode 110 are different corresponding to the color for controlling light emission. However, if the colors controlling light emission are the same, the width and shape of each data electrode 110 are constant again.

  In the Z region of FIG. 6, one data electrode 137 whose light emission control color is green, one data electrode 138 whose light emission control color is red, and data whose light emission control color is blue. Only one electrode 139 is shown. The Z region further exists on the left side up to the boundary between the display region 100a and the non-display region 100b of the panel 100, and the data electrodes 110 having the same width and shape as these data electrodes 110 exist. Omitted.

  The data electrode 110 present on the right side of the Z region, that is, adjacent to the Y region is a data electrode 137 whose color for controlling light emission is green, and the width of the data electrode 137 is the leftmost side of the Y region. Compared with the data electrode 134 whose color for controlling the light emission existing in is green, it is 3 μm wider in the L region and 130 μm. Similarly, the width of the data electrode 137 in the N region is 130 μm unchanged compared to the data electrode 121 in the X region, and is 130 μm in the M region, and the width of the data electrode 137 that controls the light emission existing in the Z region is green. The constant region is 130 μm in the L region, M region, and N region.

  Adjacent to the left side of the data electrode 137 is a data electrode 138 whose color for controlling light emission is red. The width of the data electrode 138 is 1 μm wider in the L region and 100 μm than the data electrode 135 that has a red color for controlling light emission existing on the leftmost side of the Y region. Similarly, the width of the data electrode 138 in the N region is 100 μm unchanged compared to the data electrode 122 in the X region, and in the M region is 100 μm, and the width of the data electrode 138 that controls the light emission existing in the Z region is red. , 100 μm which is constant in the L region, M region and N region.

  Similarly, a data electrode 139 whose color for controlling light emission is blue is present on the left side of the data electrode 138. The width of the data electrode 139 is 130 μm, which is wider by 3 μm in the L region and 130 μm than the data electrode 136 that has the blue color for controlling the light emission existing on the left side of the Y region. Similarly, the width of the data electrode 139 in the N region is 130 μm as compared with the data electrode 123 in the X region, and in the M region is 130 μm, and the width of the data electrode 139 that controls the emission in the Z region is blue. The constant region is 130 μm in the L region, M region, and N region.

  Note that the number and width of the data electrodes 110 described here are merely examples for explaining one specific example, and the present invention is not limited thereto.

  As described above, by configuring the data electrode 110 included in the panel 100, the width of the data electrode is narrow at the center of the panel 100, and the width of the data electrode is increased toward the outer side of the panel 100. Can be configured.

  At the same time, the width of the data electrode whose color for controlling light emission is red, the width of the data electrode whose color for controlling light emission is green, and the data electrode for which light emission is controlled are blue. It can be configured narrower than the width.

  Next, as described above, the width of the data electrode whose light emission control color is red, the width of the data electrode whose light emission control color is green, and the data electrode whose light emission control color is blue. The effects that can be obtained by making the structure narrower than the width will be described.

  FIG. 7 shows a graph showing the relationship between the writing time and the minimum voltage (Vepd) necessary for writing for each color (red, green, and blue) for controlling light emission.

  The writing time and the minimum voltage (Vepd) necessary for writing are the minimum writing time and the data electrode 110 drive voltage Vd for executing writing in each subfield shown in FIG. The relative value of the required voltage.

  Although not shown in detail in FIG. 3, as shown in FIG. 7, the minimum voltage (Vepd) required for this writing varies depending on the writing time and also depends on the colors (red, green, and blue) that control the light emission. Change.

  As shown in FIG. 7, when the writing time is lengthened, the minimum voltage (Vepd) necessary for writing may be lowered. Considering only power consumption, it is desirable that the minimum voltage (Vepd) required for writing is low, but the writing time cannot be set longer than a certain value in relation to the display cycle. Further, as shown in FIG. 7, even if the writing time is set to 2.0 or more, the minimum voltage (Vepd) required for writing does not become so low.

  Therefore, if the writing time is set to 2.0, the writing voltage Vd must be set high only for the data electrode 110 whose light emission control color is red.

  However, setting the write voltage Vd high only for the data electrode 110 whose light emission control color is red in this way increases the power consumption and at the same time complicates the control circuit.

  On the other hand, FIG. 8 shows a graph showing the relationship between the electrode width of the data electrode 110 and the minimum voltage (Vepd) necessary for writing. FIG. 8 shows the relationship between the electrode width of the data electrode 110 whose light emission control color is red and the minimum voltage (Vepd) necessary for writing.

  As shown in FIG. 8, when the electrode width of the data electrode 110 is wide, the minimum voltage (Vepd) required for writing becomes high, and by reducing the electrode width of the data electrode 110, the minimum voltage required for writing is reached. It can be seen that the voltage (Vepd) can be set low.

  Therefore, the electrode width of the data electrode 110 whose light emission control color is red, the electrode width of the data electrode 110 whose light emission control color is blue, and the electrode width of the data electrode 110 whose light emission control color is green. The write voltage Vd in the data electrode 110 whose light emission control color is red, the data electrode 110 whose light emission control color is blue, and the light emission control color is green. The write voltage Vd at the data electrode 110 can be set to the same level.

  Next, effects that can be obtained by configuring the width of the data electrode to be narrow at the center portion of the panel 100 and wide at the outer portion as described above will be described.

  In the panel 100, it is known that the write discharge becomes unstable at the outer side.

  As a first factor, a relative positional shift between the partition wall 111 and the data electrode 110 can be considered. As panel 100 increases in size and definition, it becomes difficult to accurately produce discharge cells over the entire surface of panel 100.

  Particularly in the peripheral portion of the panel 100, since errors during manufacturing such as errors due to expansion and contraction of masks and substrates used for manufacturing and errors due to alignment are integrated, the accuracy of discharge cells in the peripheral portion of the panel 100 is increased. Decreases. When the width of the data electrode 110 is narrow and the relative position between the barrier rib 111 and the data electrode 110 is shifted, the voltage applied to the data electrode 110 is not sufficiently transmitted to the inside of the discharge space 114, and an address discharge is generated. It can be difficult.

  Therefore, by designing the width of the data electrode 110 to be sufficiently wide, even if the relative position between the partition wall 111 and the data electrode 110 is shifted, the voltage applied to the data electrode 110 can be reliably supplied into the discharge space 114. It is possible to transmit, and the writing discharge is generated stably.

  As a second factor, a decrease in wall voltage on the data electrode 110 can be considered.

  In the peripheral portion of the panel 100, there is a high possibility that a gap is generated between the discharge cells 115 due to variations in the height of the barrier rib 111, the thickness of the base dielectric layer 109, unevenness, and the like.

  In the initialization period, a wall voltage suitable for the write operation is accumulated on the data electrode 110. However, if there is a gap between the discharge cells 115, charged particles come from the adjacent discharge cells 115 and are on the data electrode 110. There is a possibility that the wall charge is neutralized, the wall voltage is lowered, the voltage applied to the discharge cell 115 at the time of address discharge is insufficient, and the address discharge becomes unstable.

  Therefore, if the width of the data electrode 110 is designed to be sufficiently wide, the data electrode capacity increases, and more charges are required to change the wall voltage. That is, by designing the width of the data electrode 110 to be sufficiently wide, even if charged particles fly and neutralize the wall charges on the data electrode 110, a decrease in wall voltage can be suppressed small. Therefore, the voltage applied to the discharge cell 115 during the address discharge is not insufficient, and the address discharge is stabilized.

  In this way, by setting and arranging the width of the data electrode 110, stable write discharge can be performed over the entire display screen.

  Further, by setting the electrode width so as to continuously increase from the center to the periphery of the panel 100, the discharge characteristics of the discharge cells also change continuously, and the display quality is improved due to luminance discontinuity and the like. There is no decline.

  FIG. 9 shows a relationship between the data electrode width, the write margin, and power for driving the data electrode (hereinafter referred to as “data power”).

  The write margin is measured as an index of the stability of the write discharge, and is stable when the data electrode width is changed with reference to the write voltage necessary for a stable write operation when the data electrode width is 100 μm. This refers to the relative voltage required to perform typical writing.

  As can be seen from FIG. 9, it can be experimentally confirmed that the write margin is increased by increasing the data electrode width, but the electrode capacitance is increased by increasing the data electrode width, and the data power is increased accordingly. Resulting in.

  On the other hand, as described above, it is known that the discharge cells 115 in which the writing discharge becomes unstable are unevenly distributed in the peripheral portion of the panel 100. Therefore, it is not necessary to increase the width of the data electrode 110 over the entire surface of the panel 100. By setting the width of the data electrode 110 in the peripheral portion of the panel 100 and narrowing the width of the data electrode 110 in the central portion of the panel 100. In addition, the write discharge can be stabilized and the increase in data power can be suppressed.

  By setting the region for increasing the width of the data electrode 110 as shown in the above embodiment, the increase in data power can be suppressed to 1 to 5%.

  According to the present invention, it is possible to provide a panel that is a large and high-definition panel and that can stably write and discharge over the entire display screen while suppressing an increase in power consumption. The availability is extremely large.

The disassembled perspective view which shows the structure of the panel in the 1st Embodiment of this invention. Electrode arrangement diagram of panel according to first embodiment of the present invention Waveform diagram of drive voltage applied to each electrode of panel Schematic showing the arrangement of the data electrodes that make up the panel Enlarged view of a part of the data electrode contained inside the panel An enlarged view of a part of the data electrode included in the outer part of the panel Diagram showing the relationship between writing time and minimum voltage for each color that controls light emission Diagram showing the relationship between the electrode width of the data electrode and the write minimum voltage Diagram showing the relationship between data electrode width, write margin and data power

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Panel 101 Front plate 102 Scan electrode 103 Sustain electrode 104 Rear plate 105 Front glass substrate 106 Dielectric layer 107 Protective layer 108 Rear glass substrate 109 Underlying dielectric layer 110 Data electrode 111 Partition 112 Phosphor layer 114 Discharge space 115 Discharge cell 121 , 131, 134, 137 (The color controlling light emission is green) Data electrodes 122, 132, 135, 138 (The color controlling light emission is red) Data electrodes 123, 133, 136, 139 (Controlling light emission) Data electrode is blue)

Claims (4)

A plurality of pairs of display electrodes composed of scan electrodes and sustain electrodes arranged in parallel to each other on the first substrate;
A plasma display panel comprising a plurality of data electrodes arranged in a direction orthogonal to the display electrodes on a second substrate arranged opposite to the first substrate across a discharge space,
The electrode width of the data electrode is constant at the center of each electrode, and has taper portions where the electrode width gradually increases toward both ends on both ends of the center portion. Furthermore, both ends are constant,
The electrode width of the data electrode differs depending on the color of light whose emission is controlled by each data electrode,
Plasma display panel. A plurality of pairs of display electrodes composed of scan electrodes and sustain electrodes arranged in parallel to each other on the first substrate;
A plasma display panel comprising a plurality of data electrodes arranged in a direction orthogonal to the display electrodes on a second substrate arranged opposite to the first substrate across a discharge space,
The electrode width of the data electrode is constant when it is disposed on the inner side of the plasma display panel, and the width of the data electrode is gradually increased toward both outer sides of the plasma display panel. Further, those arranged on both outer sides of the plasma display panel are constant in the widened state,
The electrode width of the data electrode differs depending on the color of light whose emission is controlled by each data electrode,
Plasma display panel. A plurality of pairs of display electrodes composed of scan electrodes and sustain electrodes arranged in parallel to each other on the first substrate;
A plasma display panel comprising a plurality of data electrodes arranged in a direction orthogonal to the display electrodes on a second substrate arranged opposite to the first substrate across a discharge space,
The electrode width of the data electrode is constant when the electrode is arranged on the inner side of the plasma display panel, and the electrode width of each electrode arranged toward the outer side of the plasma display panel is that of the electrode arranged on the outer side. In the central portion and the taper portion, the stepwise widening, and those arranged on both outer sides of the plasma display panel are constant in the widened state,
The electrode width of the data electrode differs depending on the color of light whose emission is controlled by each data electrode,
The plasma display panel according to claim 1 . The electrode width of the data electrode is the same for the data electrodes for which the color of light for controlling light emission is blue and green, and for the data electrode for which the color of light for controlling light emission is red, the width of the light for controlling the light emission is The color is narrower than the blue and green data electrodes,
The plasma display panel according to any one of claims 1 to 3 .

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