1. A plasma display apparatus, comprising:
a plasma display panel to display an image;
a chassis base arranged at a rear of the plasma display panel;
a circuit unit, arranged on the chassis base, to drive the plasma display panel; and
a heat dissipation unit arranged between the plasma display panel and the chassis base, wherein the heat dissipation unit is directly spaced apart from the chassis base by a void, the heat dissipation unit comprising:
a first heat dissipation element, arranged parallel to both the plasma display panel and the chassis base, to dissipate heat generated by the plasma display panel; and
a second heat dissipation element, covering at least a portion of the first heat dissipation element, to prevent debris from being released from the first heat dissipation element.
2. The plasma display apparatus of claim 1, wherein the first heat dissipation element is attached to a rear surface of the plasma display panel.
3. The plasma display apparatus of claim 2, wherein the second heat dissipation element is arranged to cover an entire rear side of the first heat dissipation element.
4. The plasma display apparatus of claim 3, wherein the second heat dissipation element further includes an extension portion that extends from lateral surfaces of the first heat dissipation element to contact the rear surface of the plasma display panel, the extension portion of the second heat dissipation element being attached to the rear surface of the plasma display panel by an adhesive material.
5. The plasma display apparatus of claim 4, wherein the second heat dissipation element is thinner than the first heat dissipation element.
6. The plasma display apparatus of claim 2, further comprising an adhesive material to attach the first heat dissipation element to the plasma display panel.
7. The plasma display apparatus of claim 1, wherein the circuit unit is arranged directly on the chassis base.
8. The plasma display apparatus of claim 1, wherein the first heat dissipation element comprises a graphite-kind of material, and wherein the second heat dissipation element comprises a metal.
9. The plasma display apparatus of claim 1, wherein the first heat dissipation element comprises a graphite-kind of material, and wherein the second heat dissipation element comprises a pyrolytic carbon film produced by a process comprising coating the first heat dissipation element with pyrolytic carbon.
10. The plasma display apparatus of claim 1, the second heat dissipation element being a thin sheet, the second heat dissipation element being attached to the first heat dissipation element by an adhesive layer arranged on the first heat dissipation element.
11. A plasma display apparatus, comprising:
a plasma display panel to display an image;
a chassis base arranged at a rear of the plasma display panel;
a circuit unit, arranged on the chassis base, to drive the plasma display panel; and
a heat dissipation unit arranged between the plasma displaypanel and the chassis base, the heat dissipation unit being spaced apart from the chassis base by only a void, the heat dissipation unit comprising:
a first heat dissipation element that comprises a graphite-kind of material and arranged parallel to both the plasma display panel and the chassis base; and
a second heat dissipation element covering at least a portion of the first heat dissipation element, wherein the second heat dissipation element comprises a pyrolytic carbon film.
12. The plasma display apparatus of claim 11, wherein the first heat dissipation element is attached to the plasma display panel, and wherein the second heat dissipation element covers an entire rear side of the first heat dissipation element.
13. The plasma display apparatus of claim 12, wherein the second heat dissipation element further extends from lateral surfaces of the first heat dissipation element to contact the rear surface of the plasma display panel.
14. The plasma display apparatus of claim 13, wherein the second heat dissipation element is thinner than the first heat dissipation element.
15. The plasma display apparatus of claim 11, the void to prevent heat generated by the plasma display panel from reaching the chassis base and to prevent heat generated by the circuit unit from reaching the plasma display panel.
16. The plasma display apparatus of claim 11, wherein the second heat dissipation element is a thin sheet and is attached to the first heat dissipation element by an adhesive layer arranged on the first heat dissipation element.
17. A plasma display apparatus, comprising:
a plasma display panel to display an image;
a chassis base arranged at a rear of the plasma display panel;
a circuit unit, arranged on the chassis base, to drive the plasma display panel;
a first heat dissipation element comprising a first material and arranged on the plasma display panel; and
a second heat dissipation element comprising a second and different material and covering the first heat dissipation element, the second heat dissipation element to prevent debris from being released from the first heat dissipation element, the second heat dissipation element being attached to the plasma display panel around a periphery of the first heat dissipation element by an adhesive material, the second heat dissipation element being spaced-apart from the chassis base by a single continuous void.
18. The plasma display apparatus of claim 17, the second heat dissipation element being thinner than the first heat dissipation element.
19. The plasma display apparatus of claim 17,the void to prevent the circuit unit arranged on the chassis base from heating the plasma display panel and to prevent the plasma display panel from heating the circuit unit arranged on the chassis base.
20. The plasma display apparatus of claim 17, the first material comprising a graphite material of a high thermal conductivity, the second material comprising a material that does not release debris during a life of the plasma display apparatus.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A display apparatus comprising:
an effective pixel section having a plurality of pixel circuits arranged to form a matrix, each pixel circuit including a switching device through which pixel video data is written into said pixel circuit;
a plurality of scan lines respectively provided for individual rows of said pixel circuits arranged on said effective pixel section to control the conduction states of said switching devices;
a plurality of capacitor lines respectively arranged for the individual rows of said pixel circuits;
a plurality of signal lines respectively arranged for individual columns of said pixel circuits to propagate said pixel video data;
a first driving circuit configured to selectively drive said scan lines and said capacitor lines; and
a second driving circuit configured to drive said signal lines,
wherein said second driving circuit includes a voltage driving circuit having a voltage boosting function for carrying out a voltage boosting operation to boost an input voltage having a level with a dynamic range insufficient for a gradation expression;
said voltage driving circuit outputs a voltage obtained as a result of said voltage boosting operation or an unboosted voltage as a signal to one of said signal lines; and
said voltage driving circuit has a select function for disabling said voltage boosting function for only a set of gradations determined in advance and implementing said voltage boosting function to boost said input voltage to an output voltage according to the level of said input voltage for gradations other than said set of gradations determined in advance,
wherein the voltage driving circuit boosts only a black side with large voltage variations by setting a gradation zero as the set of gradations determined in advance, such that the voltage driving circuit disables the voltage boosting operation only for the gradation zero.
2. The display apparatus according to claim 1, wherein said voltage driving circuit carries out the voltage boosting function based on a capacitive coupling effect and does not make use of said capacitive coupling effect for the gradation zero.
3. A display apparatus comprising:
an effective pixel section having a plurality of pixel circuits arranged to form a matrix, each pixel circuit including a switching device through which pixel video data is written into said pixel circuit;
a plurality of scan lines respectively provided for individual rows of said pixel circuits arranged on said effective pixel section to control the conduction states of said switching devices;
a plurality of capacitor lines respectively arranged for the individual rows of said pixel circuits;
a plurality of signal lines respectively arranged for individual columns of said pixel circuits to propagate said pixel video data;
a first driving circuit configured to selectively drive said scan lines and said capacitor lines;
a second driving circuit configured to drive said signal lines,
wherein said second driving circuit includes a voltage driving circuit having a voltage boosting function for carrying out a voltage boosting operation to boost an input voltage having a level with a dynamic range insufficient for a gradation expression,
said voltage driving circuit outputs a voltage obtained as a result of said voltage boosting operation or an unboosted voltage as a signal to one of said signal lines, and
said voltage driving circuit has a select function for disabling said voltage boosting function for only a set of gradations determined in advance and implementing said voltage boosting function to boost said input voltage to an output voltage according to the level of said input voltage for gradations other than said set of gradations determined in advance;
a monitor circuit configured to detect an electric potential found as a midpoint of detected electric potentials appearing on positive-polarity and negative-polarity monitor pixels provided besides said effective pixel section, and corrects the center value of a common voltage signal with a level changing at predetermined time intervals on the basis of said detected potential midpoint, wherein
each of said pixel circuits arranged in said effective pixel section includes
a display element having a first pixel electrode as well as a second pixel electrode, and
a storage capacitor having a first electrode as well as a second electrode,
in each of said pixel circuits, said first pixel electrode of said display element and said first electrode of said storage capacitor are connected to one terminal of said switching device;
in each of said pixel circuits, said second electrode of said storage capacitor is connected to said capacitor line provided for said individual row; and
said common voltage with a level changing at time intervals determined in advance is supplied to said second pixel electrode of each of said display elements.
4. A method for driving a display apparatus, said display apparatus including an effective pixel section having a plurality of pixel circuits arranged to form a matrix, each pixel circuit including a switching device through which pixel video data is written into said pixel circuit; a plurality of scan lines respectively provided for individual rows of said pixel circuits arranged on said effective pixel section to control the conduction states of said switching devices; a plurality of capacitor lines respectively arranged for the individual rows of said pixel circuits; a plurality of signal lines respectively arranged for individual columns of said pixel circuits to propagate said pixel video data; a first driving circuit configured to selectively drive said scan lines and said capacitor lines; and a second driving circuit configured to drive said signal lines, the method comprising:
sending, in an operation to output a signal with a level according to a gradation expression to one of said signal lines, an input voltage having a level with a dynamic range insufficient for said gradation expression to said second driving circuit;
disabling a voltage boosting function for only a set of gradations determined in advance; and
boosting said input voltage to an output voltage according to the level of said input voltage for gradations other than said set of gradations determined in advance;
wherein said disabling and said boosting is carried out for a black side with large voltage variations by setting a gradation zero as the set of gradations determined in advance, such that the voltage boosting operation is disabled only for the gradation zero.
5. The method according to claim 4, wherein said voltage driving circuit carries out the voltage boosting function based on a capacitive coupling effect and does not make use of said capacitive coupling effect for gradation zero.
6. An electronic equipment comprising
a display apparatus including:
an effective pixel section having a plurality of pixel circuits arranged to form a matrix, each pixel circuit including a switching device through which pixel video data is written into said pixel circuit;
a plurality of scan lines respectively provided for individual rows of said pixel circuits arranged on said effective pixel section to control the conduction states of said switching devices;
a plurality of capacitor lines respectively arranged for the individual rows of said pixel circuits;
a plurality of signal lines respectively arranged for columns of said pixel circuits to propagate said pixel video data;
a first driving circuit configured to selectively drive said scan lines and said capacitor lines; and
a second driving circuit configured to drive said signal lines,
wherein said second driving circuit includes a voltage driving circuit having a voltage boosting function for carrying out a voltage boosting operation to boost an input voltage having a level with a dynamic range insufficient for a gradation expression,
said voltage driving circuit outputs a voltage obtained as a result of said voltage boosting operation or an unboosted voltage as a signal to one of said signal lines, and
said voltage driving circuit has a select function for disabling said voltage boosting function for only a set of gradations determined in advance and implementing said voltage boosting function to boost said input voltage to an output voltage according to the level of said input voltage for gradations other than said set of gradations determined in advance,
wherein the voltage driving circuit boosts only a black side with large voltage variations by setting a gradation zero as the set of gradations determined in advance, such that the voltage driving circuit disables the voltage boosting operation only for the gradation zero.
7. The electronic equipment according to claim 6, wherein said voltage driving circuit carries out the voltage boosting function based on a capacitive coupling effect and does not make use of said capacitive coupling effect for gradation zero.
8. A method for driving a display apparatus, said display apparatus including an effective pixel section having a plurality of pixel circuits arranged to form a matrix, each pixel circuit including a switching device through which pixel video data is written into said pixel circuit; a plurality of scan lines respectively provided for individual rows of said pixel circuits arranged on said effective pixel section to control the conduction states of said switching devices; a plurality of capacitor lines respectively arranged for the individual rows of said pixel circuits; a plurality of signal lines respectively arranged for individual columns of said pixel circuits to propagate said pixel video data a first driving circuit configured to selectively drive said scan lines and said capacitor lines; and a second driving circuit configured to drive said signal lines, the method comprising:
sending, in an operation to output a signal with a level according to a gradation expression to one of said signal lines, an input voltage having a level with a dynamic range insufficient for said gradation expression to said second driving circuit;
disabling a voltage boosting function for only a set of gradations determined in advance;
boosting said input voltage to an output voltage according to the level of said input voltage for gradations other than said set of gradations determined in advance; and
detecting, by a monitor circuit, an electric potential found as a midpoint of detected electric potentials appearing on positive-polarity and negative-polarity monitor pixels provided besides said effective pixel section, and
correcting the center value of a common voltage signal with a level changing at predetermined time intervals on the basis of said detected potential midpoint, wherein
each of said pixel circuits arranged in said effective pixel section includes
a display element having a first pixel electrode as well as a second pixel electrode, and
a storage capacitor having a first electrode as well as a second electrode,
in each of said pixel circuits, said first pixel electrode of said display element and said first electrode of said storage capacitor are connected to one terminal of said switching device;
in each of said pixel circuits, said second electrode of said storage capacitor is connected to said capacitor line provided for said individual row; and
said common voltage with a level changing at time intervals determined in advance is supplied to said second pixel electrode of each of said display elements.
9. An electronic equipment comprising:
a display apparatus including:
an effective pixel section having a plurality of pixel circuits arranged to form a matrix, each pixel circuit including a switching device through which pixel video data is written into said pixel circuit;
a plurality of scan lines respectively provided for individual rows of said pixel circuits arranged on said effective pixel section to control the conduction states of said switching devices;
a plurality of capacitor lines respectively arranged for the individual rows of said pixel circuits;
a plurality of signal lines respectively arranged for columns of said pixel circuits to propagate said pixel video data;
a first driving circuit configured to selectively drive said scan lines and said capacitor lines;
a second driving circuit configured to drive said signal lines,
wherein said second driving circuit includes a voltage driving circuit having a voltage boosting function for carrying out a voltage boosting operation to boost an input voltage having a level with a dynamic range insufficient for a gradation expression,
said voltage driving circuit outputs a voltage obtained as a result of said voltage boosting operation or an unboosted voltage as a signal to one of said signal lines, and
said voltage driving circuit has a select function for disabling said voltage boosting function for only a set of gradations determined in advance and implementing said voltage boosting function to boost said input voltage to an output voltage according to the level of said input voltage for gradations other than said set of gradations determined in advance;
a monitor circuit configured to detect an electric potential found as a midpoint of detected electric potentials appearing on positive-polarity and negative-polarity monitor pixels provided besides said effective pixel section, and corrects the center value of a common voltage signal with a level changing at predetermined time intervals on the basis of said detected potential midpoint, wherein
each of said pixel circuits arranged in said effective pixel section includes
a display element having a first pixel electrode as well as a second pixel electrode, and
a storage capacitor having a first electrode as well as a second electrode,
in each of said pixel circuits, said first pixel electrode of said display element and said first electrode of said storage capacitor are connected to one terminal of said switching device;
in each of said pixel circuits, said second electrode of said storage capacitor is connected to said capacitor line provided for said individual row; and
said common voltage with a level changing at time intervals determined in advance is supplied to said second pixel electrode of each of said display elements.