KR20110086902A - Display device and drving method thereof - Google Patents

Abstract

PURPOSE: A display device is provided to check the output power state information of a power supply unit through a display unit. CONSTITUTION: A display device includes a power supply unit(160), a display unit, and a main board unit(170). The power supply unit generates a power source. The display unit displays an image. The main board unit displays an error message according to a state of the power supply unit on the display unit. The error message is marked on a designated location of the display unit or is moved in a display space of the display unit.

Description

Display device and driving method thereof

An embodiment of the present invention relates to a display apparatus and a driving method thereof.

Display devices used for home appliances, offices, or industrial use such as computer monitors and televisions, liquid crystal display panels, plasma display panels, organic light emitting devices (organic light emitting diode) and the like.

The display apparatus includes a power supply unit for generating power, a display unit for displaying an image, and a main board unit for controlling the display unit to display the image signal supplied from the power supply unit and supplied from the outside.

When a conventional display device tries to analyze the cause due to an error in the power supply unit, the display device may be removed by using a method of checking a waveform of a pin connected to the power control unit controlling the power unit after removing the cover of the assembled product. Detected. Therefore, the conventional display device is inconvenient to detect the error by separating the assembled product and mobilizing separate equipment when an error occurs in the power supply unit is required to improve this.

Embodiment of the present invention for solving the above problems of the background art, the output power state information of the power supply unit to have a convenience function that can be handled in the un-separated state as well as the manufacturing process during the customer A / S It is to provide a display device and a driving method thereof that can be identified through the display unit.

Embodiment of the present invention as a problem solving means described above, the power supply for generating power; A display unit for displaying an image; And a main board unit for controlling an error message according to a state of the power supply unit to be displayed on the display unit.

Error messages include codes, letters, and numbers and may be represented by one or more of them.

The error message may be displayed at a designated position of the display unit or may move within the display area of the display unit.

The power supply unit may include a power supply unit for generating power, and a power control unit for controlling the power supply unit and detecting a state of the power supply unit to generate error information when an error is detected.

The power supply unit may supply error information corresponding to the error message through a connector connecting the power supply unit and the mainboard unit.

The main board unit may include a main control unit which generates an error message and controls the error message to be displayed on the display unit.

The main control unit may retrieve an error message from the memory unit.

The display unit may include a plasma display panel.

In another aspect, an embodiment of the present invention, detecting the state of the power supply; Supplying error information to the main control unit when an error is detected from the power supply unit; Generating an error message corresponding to the error information; And displaying an error message on the display unit.

Error messages include codes, letters, and numbers and may be represented by one or more of them.

The error message may be displayed at a designated position of the display unit or may move within the display area of the display unit.

The error message may be blinking.

Embodiment of the present invention, the output power state information of the power supply can be confirmed through the display unit and the display device with a convenient function that can be handled in the un-separated state as well as the manufacturing process during the customer A / S There is an effect that can provide a driving method thereof. In addition, according to the embodiment of the present invention, if an error occurs in the power supply unit, a message for each error appears so that a cause can be identified without mobilizing additional equipment, thereby enabling rapid response for each error state.

1 to 3 are views for explaining the structure of a display unit of a display device according to an embodiment of the present invention.
4 is a view for explaining an operation example of the display apparatus according to an embodiment of the present invention.
5 is a schematic diagram illustrating a display apparatus according to an embodiment of the present invention.
6 is a detailed block diagram of a portion of FIG. 5;
7 is an exemplary diagram illustrating an error message displayed on a display unit.
8 is a flowchart illustrating a method of driving a display apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the specific content for the practice of the present invention will be described.

<Display device>

1 to 3 are views for explaining the structure of a display unit of a display device according to an embodiment of the present invention.

The display unit of the display device according to an exemplary embodiment of the present invention may be implemented by a plasma display panel, a liquid crystal display panel, an organic light emitting display panel, or the like.

As shown in FIG. 1, the display unit 100 of the display device according to an exemplary embodiment of the present invention may include a front substrate 101 on which scan electrodes 102 and Y and sustain electrodes 103 and Z are arranged in parallel with each other. The rear substrate 111, which is disposed to face the front substrate 101 and has an address electrode 113 intersecting with the scan electrode 102 and the sustain electrode 103, is disposed by a seal layer (not shown). It can be made in combination.

An upper dielectric layer 104 is disposed on the front substrate 101 on which the scan electrode 102 and the sustain electrode 103 are disposed, and the scan electrode 102 and the sustain electrode 103 are embedded. The upper dielectric layer 104 limits the discharge current of the scan electrode 102 and the sustain electrode 103 and can insulate between the scan electrode 102 and the sustain electrode 103. A protective layer 105 may be disposed over the upper dielectric layer 104 to facilitate discharge conditions. The protective layer 105 may include a material having a high secondary electron emission coefficient, such as magnesium oxide (MgO).

An electrode, for example, an address electrode 113 is disposed on the rear substrate 111, and the address substrate 113 is covered on the rear substrate 111 on which the address electrode 113 is disposed to insulate the address electrode 113. A dielectric layer, such as lower dielectric layer 115, may be disposed. On top of the lower dielectric layer 115, a discharge space, that is, a partition wall 112 such as a stripe type, a well type, a delta type, a honeycomb type, etc., which partitions a discharge cell, may be disposed. Can be. The barrier rib 112 may be provided with a red (R), green (G), and blue (B) discharge cell between the front substrate 101 and the rear substrate 111. In addition, in addition to the red (R), green (G), and blue (B) discharge cells, white (W) or yellow (Yellow: Y) discharge cells may be further provided.

In the discharge cell partitioned by the partition wall 112, a discharge gas such as xenon (Xe), neon (Ne), or the like may be filled. In addition, a phosphor layer 114 that emits visible light for image display may be disposed in the discharge cell partitioned by the partition wall 112. For example, a first phosphor layer emitting red (R) light, a second phosphor layer emitting blue (B) light, and a third phosphor layer emitting green (G) light are disposed. Can be. In addition to the red (R), green (G), and blue (B) light, it is also possible to further arrange other phosphor layers emitting white (W) light or yellow (Yellow: Y) light. In addition, the thickness of the phosphor layer 114 in at least one of the red (R), green (G), and blue (B) discharge cells may be different from other discharge cells. For example, a phosphor layer of a green (G) discharge cell, that is, a phosphor layer in a third phosphor layer or a blue (B) discharge cell, that is, a thickness of a second phosphor layer in a red (R) discharge cell, Ie thicker than the thickness of the first phosphor layer. Here, the thickness of the third phosphor layer may be substantially the same or different from the thickness of the second phosphor layer.

In addition, in the display unit 100 according to the exemplary embodiment, the widths of the red (R), green (G), and blue (B) discharge cells may be substantially the same, but red (R), green (G), and the like. It is also possible that the width of at least one of the blue (B) discharge cells is different from the width of the other discharge cells. For example, the width of the red (R) discharge cell is the smallest, and the width of the green (G) and blue (B) discharge cells can be made larger than the width of the red (R) discharge cell. Here, the width of the green (G) discharge cell may be substantially the same as or different from the width of the blue (B) discharge cell. The width of the phosphor layer 114 disposed in the discharge cell is then changed in relation to the width of the discharge cell. For example, the width of the second phosphor layer disposed in the blue (B) discharge cell is wider than the width of the first phosphor layer disposed in the red (R) discharge cell, and the third disposed in the green (G) discharge cell. The width of the phosphor layer may be wider than the width of the first phosphor layer disposed in the red (R) discharge cell, thereby improving the color temperature characteristics of the image implemented.

In addition, the display unit 100 according to an exemplary embodiment of the present invention may have not only the structure of the partition wall 112 shown in FIG. 1 but also the structure of the partition wall having various shapes. For example, the partition wall 112 includes a first partition wall 112b and a second partition wall 112a, where the height of the first partition wall 112b and the height of the second partition wall 112a are different from each other. Etc. are possible. In the case of the differential partition wall structure, the height of the first partition wall 112b among the first partition wall 112b or the second partition wall 112a may be lower than the height of the second partition wall 112a.

In addition, although the red (R), green (G), and blue (B) discharge cells are each shown and described as being arranged on the same line in FIG. 1, they may be arranged in other shapes. For example, a delta type arrangement in which red (R), green (G) and blue (B) discharge cells are arranged in a triangular shape is also possible. In addition, the shape of the discharge cell is not only rectangular but also various polygonal shapes such as pentagon and hexagon. In addition, although only the case where the partition wall 112 is formed in the rear substrate 111 is illustrated in FIG. 1, the partition wall 112 may be disposed on at least one of the front substrate 101 and the rear substrate 111.

In the above description, only one example of the display unit 100 according to an exemplary embodiment of the present invention is illustrated and described. However, the present invention is not limited to the display unit 100 having the structure described above. For example, the above description shows only the case where the lower dielectric layer number 115 and the upper dielectric layer number 104 are one layer, but at least one of the lower dielectric layer or the upper dielectric layer is not composed of a plurality of layers. It is also possible. In addition, although the width and thickness of the address electrode 113 disposed on the rear substrate 111 may be substantially constant, the width or thickness inside the discharge cell may be different from the width or thickness outside the discharge cell. For example, the width or thickness inside the discharge cell may be wider or thicker than that outside the discharge cell.

As shown in FIG. 2, an example of another structure of the scan electrode 102 and the sustain electrode 103 is shown. The scan electrode 102 and the sustain electrode 103 can each have a multi-layer structure. For example, the scan electrode 102 and the sustain electrode 103 may include the transparent electrodes 102a and 103a and the bus electrodes 102b and 103b. Here, the bus electrodes 102b and 103b include at least one of a substantially opaque material such as silver (Ag), gold (Au), and aluminum (Al), and the transparent electrodes 102a and 103a are substantially transparent. The material may include, for example, indium tin oxide (ITO) material. In addition, when the scan electrode 102 and the sustain electrode 103 include the bus electrodes 102b and 103b and the transparent electrodes 102a and 103a, the reflection of external light by the bus electrodes 102b and 103b is prevented. The black layers 120 and 130 may be further included between the transparent electrodes 102a and 103a and the bus electrodes 102b and 103b. On the other hand, the transparent electrodes 102a and 103a may be omitted from the scan electrode 102 and the sustain electrode 103. That is, the scan electrode 102 and the sustain electrode 103 can also be ITO-Less electrodes in which the transparent electrodes 102a and 103a are omitted.

As shown in FIG. 3, the address electrodes Xa1 to Xam formed on the display unit 100 intersect the scan electrodes Y1 to Yn and the sustain electrodes Z1 to Zn.

4 is a view for explaining an example of the operation of the display device according to an embodiment of the present invention. 4 illustrates an example of an operation of a display apparatus according to an exemplary embodiment, and a method of operating the same may be variously changed.

As shown in FIG. 4, the reset signal may be supplied to the scan electrode in the reset period for initialization. The reset signal may include a ramp-up signal and a ramp-down signal. For example, in the set-up period, the voltage gradually increases from the second voltage V2 to the third voltage V3 after the voltage rises rapidly from the first voltage V1 to the second voltage V2 with the scan electrode. Rising rising ramp signals may be supplied. Here, the first voltage V1 may be a voltage of the ground level GND. In this setup period, a weak dark discharge, that is, setup discharge, occurs in the discharge cell by the rising ramp signal. By this setup discharge, some wall charges can be accumulated in the discharge cells. In the set-down period after the setup period, the rising ramp signal may be supplied to the scan electrode after the rising ramp signal in the opposite polarity direction. Here, the falling ramp signal may gradually fall from the peak voltage of the rising ramp signal, that is, the fourth voltage V4 lower than the third voltage V3 to the fifth voltage V5. As the falling ramp signal is supplied, a weak erase discharge, that is, a setdown discharge, occurs in the discharge cell. By this set-down discharge, wall charges such that address discharge can be stably generated in the discharge cells remain uniformly.

In the address period after the reset period, a scan bias signal that substantially maintains the lowest voltage of the falling ramp signal, that is, a voltage higher than the fifth voltage V5, for example, the sixth voltage V6, is supplied to the scan electrode. In addition, a scan signal falling from the scan bias signal may be supplied to the scan electrode.

Meanwhile, the pulse width of the scan signal Scan supplied to the scan electrode in the address period of at least one subfield may be different from the pulse width of the scan signal of another subfield. For example, the width of the scan signal in the subfield located later in time may be smaller than the width of the scan signal in the preceding subfield. In addition, the reduction of the scan signal width according to the arrangement order of the subfields can be made gradually, such as 2.6 Hz (microseconds), 2.3 Hz, 2.1 Hz, 1.9 Hz, or 2.6 Hz, 2.3 Hz, 2.3 Hz, 2.1 Hz. .... 1.9㎲, 1.9㎲, etc. may be made, but is not limited thereto.

As such, when the scan signal is supplied to the scan electrode, the data signal may be supplied to the address electrode corresponding to the scan signal. When the scan signal and the data signal are supplied, an address discharge may be generated in the discharge cell to which the data signal is supplied while the voltage difference between the scan signal and the data signal and the wall voltage generated by the wall charges generated in the reset period are added. . Here, the sustain bias signal may be supplied to the sustain electrode in order to prevent the address discharge from becoming unstable due to the interference of the sustain electrode in the address period. The sustain bias signal can keep the sustain bias voltage Vz smaller than the voltage of the sustain signal supplied in the sustain period and larger than the voltage of the ground level GND.

Subsequently, in the sustain period for displaying an image, a sustain signal may be supplied to at least one of the scan electrode and the sustain electrode. For example, a sustain signal may be alternately supplied to the scan electrode and the sustain electrode. When such a sustain signal is supplied, the discharge cell selected by the address discharge is added with the wall voltage in the discharge cell and the sustain voltage Vs of the sustain signal, and a sustain discharge, i.e., display between the scan electrode and the sustain electrode when the sustain signal is supplied. Discharge may occur.

Meanwhile, in the at least one subfield, a plurality of sustain signals are supplied in the sustain period, and the pulse width of at least one sustain signal of the plurality of sustain signals may be different from the pulse widths of other sustain signals. For example, the pulse width of the sustain signal that is supplied first of the plurality of sustain signals may be larger than the pulse width of other sustain signals. Then, the sustain discharge can be more stabilized.

Hereinafter, a display apparatus according to an embodiment of the present invention will be described in more detail.

5 is a schematic diagram illustrating a display apparatus according to an exemplary embodiment of the present invention, FIG. 6 is a detailed block diagram of FIG. 5, and FIG. 7 is an exemplary diagram showing an error message displayed on a display unit.

As shown in FIG. 5, the display apparatus according to an embodiment of the present invention may include a scan driver 130, a sustain driver 140, an address driver 150, a power supply unit 160, and a main board unit 170. Include.

The scan driver 130 supplies a scan signal to a scan electrode included in the display unit. The sustain driver 140 supplies a sustain signal to the sustain electrode included in the display unit. The address driver 150 supplies a data signal to an address electrode included in the display unit. The power supply unit 160 generates power and supplies the power to one or more of the scan driver 130, the sustain driver 140, the address driver 150, and the main board unit 170. The main board unit 170 controls an error message according to the state of the power supply unit 160 to be displayed on the display unit.

The power supply unit 160 supplies error information ER_DET corresponding to the error message to the motherboard 170 through the connectors 161 and 171 connecting the power supply 160 and the motherboard 170. The connector 161 formed on the power supply unit 160 and the connector 171 formed on the main board unit 170 are electrically connected by the cable 180 or the like.

As shown in FIG. 6, the power supply unit 160 controls the power supply unit 162 for generating power (V1 to Vn, GND), and controls the power supply unit 162 and detects a state of the power supply unit 162 to detect an error. And a power controller 165 for generating error information ER_DET.

The main board unit 170 generates an error message corresponding to the error information ER_DET supplied through the connector 171 and controls the error message to be displayed on the display unit. The main controller 175 controls the scan driver 130, the sustain driver 140, and the address driver 150 to read the error message from the memory unit 177 formed inside or outside and display the error message on the display unit. Here, the error message may include a code, a letter and a number and may be displayed in combination with one or more of them.

As illustrated in FIG. 7, the error message M may be displayed on the display unit 100 in various forms. Referring to FIG. 7A, the error message M may be displayed at a designated position of the display unit 100. In contrast, referring to FIG. 7B, the error message M may be displayed while moving in the display area of the display unit 100. In contrast, referring to FIG. 7C, the error message M may blink within the display area of the display unit 100. Meanwhile, the error message M may be displayed on the display unit 100 in a combination of one or more of (a), (b) and (c) or may be displayed in other forms.

The power control unit 165 of the display device according to the embodiment detects the output power (V1 to Vn, GND) of the power supply unit 162 at all times, and if an error or abnormality occurs, the information for each error is n-bit binary code. Error information ER_DET can be generated. For example, the power controller 165 may be configured when the output power of one or more of the power supplies V1 to Vn and GND of the power supply unit 162 is higher or lower than the normal voltage (or current) (or no output of a specific power supply). The corresponding error information ER_DET is generated as an n-bit binary code and the like, and is supplied to the main controller 175 of the motherboard 170. Then, the main controller 175 reads the error message M corresponding to the error information ER_DET from the memory unit 177 and the scan driver 130 and the sustain so that the error message M is displayed on the display unit 100. The driver 140 and the address driver 150 are controlled.

<How to drive the display device>

8 is a flowchart illustrating a method of driving a display apparatus according to an embodiment of the present invention.

5 to 8, the display apparatus according to an embodiment of the present invention detects the state of the power supply unit 160. (S110) The state detection of the power supply unit 160 includes power (V1 to Vn). , By the power control unit 165 in conjunction with the power supply unit 162 for outputting GND.

When an error is detected from the power supply unit 160, the error information ER_DET is supplied to the main controller 175. (S113) The power controller 165 is one of the output powers V1 to Vn and GND of the power unit 162. When the above output power is higher or lower than the normal voltage (or current) (or when there is no output of a specific power), error information ER_DET corresponding thereto is generated and the main control unit included in the system board unit 170 175).

An error message M corresponding to the error information ER_DET is generated. (S115) The main controller 175 stores an error message M corresponding to the error information ER_DET supplied from the power supply unit 160 in the memory unit. (177) and the like can be generated.

The error message M is displayed on the display unit 100. (S117) The main controller 175 controls the scan driver 130, the sustain driver 140, and the address driver 150 to generate the error message M. Is displayed on the display unit 100.

Here, the error information ER_DET may be generated as a binary code of n bits, and the error message M generated corresponding to the error information ER_DET includes a code, a letter and a number, and one or more of them. Can be displayed in combination. In addition to the description, the error message M may be displayed on the display unit 100 in various forms. As described above with reference to FIG. 7A, the error message M may be displayed at a designated position of the display unit 100. Unlike this, as illustrated in FIG. 7B, the error message M may be displayed while moving in the display area of the display unit 100. In contrast, as shown in FIG. 7C, the error message M may blink within the display area of the display unit 100. Meanwhile, the error message M may be displayed on the display unit 100 in a combination of one or more of (a), (b) and (c) or may be displayed in other forms.

Embodiments of the present invention can be confirmed through the display unit output power state information of the power supply unit and the display device with a convenient function that can be handled in the un-separated state as well as the manufacturing process during the customer A / S There is an effect that can provide a driving method thereof. In addition, according to the embodiment of the present invention, if an error occurs in the power supply unit, a message for each error appears so that a cause can be identified without mobilizing additional equipment, thereby enabling rapid response for each error state.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical configuration of the present invention described above may be modified in other specific forms by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features. It will be appreciated that it may be practiced. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all aspects. In addition, the scope of the present invention is shown by the claims below, rather than the above detailed description. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.

130: scan driver 140: sustain driver
150: address driver 160: power supply
162: power supply unit 165: power control unit
170: main board unit 175: main control unit

Claims (12)

A power supply unit generating power;
A display unit for displaying an image; And
And a main board unit for controlling an error message according to a state of the power supply unit to be displayed on the display unit. The method of claim 1,
The error message,
Display device comprising a code, letters and numbers and is represented by one or more of them. The method of claim 1,
The error message,
And a display unit displayed at a designated position of the display unit or moving within a display area of the display unit. The method of claim 1,
The power supply unit,
A power supply unit for generating power;
And a power control unit which controls the power unit and detects a state of the power unit to generate error information when an error is detected. The method of claim 1,
The power supply unit,
And display error information corresponding to the error message through a connector connecting the power supply unit and the mainboard unit. The method of claim 1,
The main board unit,
And a main controller configured to generate the error message and to control the error message to be displayed on the display unit. The method of claim 6,
The main control unit,
And displaying the error message from the memory unit. The method of claim 1,
The display unit,
Display device including a plasma display panel. Detecting a state of a power supply unit;
Supplying error information to the main control unit when an error is detected from the power supply unit;
Generating an error message corresponding to the error information; And
And displaying the error message on a display unit. 10. The method of claim 9,
The error message,
A method of driving a display apparatus comprising a code, a letter and a number and displayed by at least one of them. 10. The method of claim 9,
The error message,
And a display unit which is displayed at a designated position of the display unit or moves within a display area of the display unit. 10. The method of claim 9,
The error message,
Method of driving a display device, characterized in that flashing.

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