TWI411991B - Driving circuit and method of field emission display panel and field emission display - Google Patents

Abstract

A driving circuit and a method to a field emission display (FED) panel and a field emission display are provided. The driving circuit includes a clock generator, a counter coupling to the clock generator, a register unit coupling to the counter, and a driving signal generating module coupling the register unit. A clock signal is generated by the clock generator. A frame tag is outputted by the counter according to the clock signal. The register unit is used for storing a plurality of pattern data, and outputting a display frame of the pattern data according to the frame tag. The driving signal generating module is used for receiving the display frame, and generating a driving signal set according to a row tag.

Description

Field emission display panel driving circuit and method and field emission display

The present invention relates to a flat panel display technology, and more particularly to a field emission display technology driving circuit, a driving method, and a field emission display.

The current flat panel display technology includes a conventional cathode ray tube (CRT), a thin film transistor liquid crystal display (TFT-LCD), and a plasma flat panel display. (Plasma Display Panel, PDP for short) and Field Emission Display (FED).

In the case of a field emission display, it has a thin thickness (about 2 to 10 cm), a light weight (about less than 0.2 kg), a wide viewing angle (no viewing angle problem), a large brightness (about 150 Cd per square meter), and an operating temperature. The range is flexible (about 50 degrees Celsius to 80 degrees Celsius) and energy saving (about 1 watt). Therefore, field emission displays are considered one of the most promising flat panel display technologies in the 21st century.

The invention provides a driving circuit, a driving method and a field emission display of a field emission display panel, which can further improve the traditional field emission display technology Rise.

The invention provides a driving circuit for a field emission display panel, which comprises a clock generator, a counter, a frame temporary storage unit and a driving signal generating module. The counter is coupled to the clock generator, and the frame temporary storage unit is coupled to the counter, and the driving signal generating module is coupled to the frame temporary storage unit. The clock generator generates a clock signal. The counter counts according to the clock signal to output a frame label. The frame temporary storage unit is configured to store a plurality of graphic data or a plurality of font data, and output a graphic frame or a display frame in the font data according to the frame label. The driving signal generating module is configured to receive the display frame and generate a driving signal group according to the column of labels.

The invention further provides a field emission display comprising a field emission display panel and a driving circuit, wherein the driving circuit comprises a clock generator, a counter, a frame temporary storage unit and a driving signal generating module. The counter is coupled to the clock generator, and the frame temporary storage unit is coupled to the clock generator and the counter, and the driving signal generating module is coupled to the frame temporary storage unit. The clock generator generates a clock signal. The counter counts according to the clock signal to output a frame label. The frame temporary storage unit is configured to store a plurality of graphic data or a plurality of font data, and output a graphic frame or a display frame in the font data according to the frame label. The driving signal generating module is configured to receive the display frame and generate a driving signal group according to the column of labels.

In an embodiment of the invention, the clock generator includes a counting unit and a frequency dividing unit, wherein the frequency dividing unit is coupled to the counting unit. The counting unit receives an initial clock signal and generates a periodic clock signal according to a fixed period of counting the initial clock signal. Frequency division unit receiving cycle time signal No., and the frequency cycle clock signal is obtained to obtain a clock signal having a specific duty cycle. In an embodiment, the specific duty cycle is 50%.

In an embodiment of the invention, the driving circuit of the field emission display panel further comprises a column of data enabling units. The column data enabling unit receives the clock signal and generates a plurality of scan line enable signals according to the clock signal. In an embodiment, the driving circuit of the field emission display panel further includes a column of scanning drivers. The column scan driver has a plurality of Metal Oxide Semiconductor Field Effect Transistors (MOSFETs) and is controlled by a scan line enable signal to enable field emission of a plurality of scan lines of the display panel.

The present invention further provides a driving method of a field emission display panel, which comprises the following steps. A clock generator is provided, wherein the clock generator is configured to generate a clock signal. A counter is provided, wherein the counter is used to count according to the clock signal to output a frame label. A frame temporary storage unit is provided, wherein the frame temporary storage unit is configured to store a plurality of graphic data or a plurality of font data, and output a graphic frame or a display frame in the font data according to the frame label. A driving signal generating module is provided, wherein the driving signal generating module is configured to receive the display frame and generate a driving signal group according to the column of labels.

In an embodiment of the invention, the drive signal group includes a plurality of scan signals.

In an embodiment of the invention, the set of drive signals comprises a plurality of data signals.

Based on the above, the field emission display and field emission display panel of the present invention The drive circuit and driving method can enhance the traditional field emission display technology.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a block diagram of a field emission display according to an embodiment of the present invention. Referring to FIG. 1 , the field emission display 100 of the present embodiment includes a driving circuit 200 and a field emission display panel 300 , wherein the driving circuit 200 is coupled to the field emission display panel 300 . In this embodiment, the field emission display panel 300 includes a plurality of scanning lines GL, a plurality of data lines DL, and a plurality of display units PIX, wherein the display unit PIX and the corresponding scanning lines GL and the corresponding data lines DL are electrically connection. It should be noted that the scan line GL, the data line DL, and the display unit PIX are only used to indicate the field emission display panel 300 to facilitate the description of the embodiment, and do not limit the layout or structure of the field emission display panel of the present invention.

2 is a block diagram showing the driving circuit of FIG. 1. Referring to FIG. 2, the driving circuit 200 of the embodiment includes a clock generator 210, a counter 220, a frame temporary storage unit 230, and a driving signal generating module 250. The counter 220 is coupled to the clock generator 210, and the frame temporary storage unit 230 is coupled to the counter 220, and the driving signal generating module 250 is coupled to the frame temporary storage unit 230.

Of course, the driving circuit 200 of this embodiment may further include other components, such as a column scanning driver 260, a column data enabling unit 262, and a row data driver 270, wherein the column scanning drive The actuator 260 and the row data driver 270 are electrically connected to the scan line GL and the data line DL of the field emission display panel 300 (shown in FIG. 1), respectively. In this embodiment, the column data enabling unit 262 can generate a plurality of scan line enable signals, and the column scan driver 260 can be provided with a plurality of gold oxide half field powers that can be controlled by the scan line enable signal. A metal (Otal Oxide Semiconductor Field Effect Transistor, MOSFET) is used to perform the operation of the scan line GL. In the present embodiment, the MOSFET voltage of the column scan driver 260 reaches, for example, a DC voltage of 300 volts (Volot, V) to cause the field emission display panel 300 to operate normally. However, the present embodiment is mainly directed to the spirit of the present invention, and thus the components included in the drive circuit 200 are not enumerated here.

In this embodiment, the clock generator 210 further includes a counting unit 212 and a frequency dividing unit 214, wherein the frequency dividing unit 214 is coupled to the counting unit 212. The counting unit 212 is configured to receive an initial clock signal CLK and generate a periodic clock signal DIV1 accordingly. The frequency dividing unit 214 is configured to receive the clock signal DIV1 of the period to further obtain a clock signal DIV2.

In practice, and in combination with the waveform diagrams shown in FIG. 2 and FIG. 3, the counting unit 212 can generate the periodic clock signal DIV1 according to a fixed period T1 of the initial clock signal CLK, and the frequency dividing unit 214 can This period clock signal DIV1 performs a frequency division operation to obtain a clock signal DIV2 having a specific duty cycle T2. In the present embodiment, the aforementioned specific duty cycle T2 is, for example, 50%.

In this embodiment, the frame temporary storage unit 230 is configured to store graphic data or font data of a plurality of frames, wherein the frame temporary storage unit 230 is established. This can be achieved by software in a personal computer (Personal Computer, PC) (for example, WordPad), but the invention is not limited thereto. More specifically, the font data or graphic data of the present embodiment can be formed by "0" and "1" generated by WordPad. Wherein, the font or graphic of "0" indicates the brightness when the pixels in the field emission display panel 300 are turned off; and vice versa, the font or graphic of "1" indicates when the pixels in the field emission display panel 300 are turned on. brightness.

In practice, the frame temporary storage unit 230 is internally composed of a plurality of frame register logic circuits, and the function mainly accesses digital data. The frame temporary storage unit 230 is the main core of the drive circuit 200. In addition, the number of registers used by each frame is the same as the number of columns of the field emission display panel 300, and the number of bits of the scratchpad used in each frame and the number of rows of the field emission display panel 300 are the same. In this way, we can display the font or graphic to be displayed by the field emission display panel 300 in a ratio of 1 to 1. There is no limit to the number of frames to be displayed, and each frame corresponds to a tag. Each tag is locked by a cyclic counter of 1 to N value, and the corresponding tag is output according to the clock signal DIV2.

After the clock generator 210 generates the clock signal DIV2, the counter 220 can count according to the pulse signal DIV2 to output a frame label T _FRAME . Then, the frame temporary storage unit 230 outputs one of the graphic data or the font data according to the frame label T _FRAME , that is, outputs a display frame (described later in detail).

For example, it is assumed that the graphic data stored in the frame temporary storage unit 230 of the present embodiment is an almanac, that is, the graphic data of the frames is twelve months of graphic data. When the frame label T _FRAME output by the counter 220 is, for example, 8, the frame temporary storage unit 230 may output the graphic data of August and use the graphic data of the August as a display frame. For the same reason, the relationship between other frame labels and other graphic materials or font data can be derived in this way.

In particular, the driving circuit 200 of the embodiment can be driven to drive the field emission display panel 300 by using the graphic data or the font data of the plurality of frames having the continuous motion in the frame temporary storage unit 230. Figure 1) shows the dynamic picture.

Then, the driving signal generating module 250 receives the display frame and generates a driving signal group according to the column of labels. In this embodiment, a counting unit (not shown) for counting is further provided in the driving signal generating module 250 to obtain a desired column label. More specifically, it is assumed that the display frame received by the driving signal generating module 250 is a matrix of 40 columns×200 rows (not shown), and when the column label output by the counter 220 is 2, the driving signal is The generation module 250 can output the second column of the display frame according to the column label, and so on the relationship between the other column labels and other columns of data. Simultaneously, the driving signal generating module 250 also generates a DIOA control signal to the column data enabling unit 262, such as when the last column of the processing driving signal generating module 250 is fixed (for example, the first column of the matrix pattern). Let the control signal of DIOA be High, and the rest of the columns let the control signal of DIOA be Low.

In this embodiment, the driving signal group includes a plurality of scanning signals and a plurality of data signals. The scan signal is used to drive the column scan driver 260, and the data signal is used to drive the row data driver 270, and the column scan driver 260 and row data driver 270 are electrically connected to scan line GL (shown in FIG. 1) and data line DL (shown in FIG. 1).

Finally, in particular, the field emission display panel 300 of the present embodiment scans in a direction from bottom to top. In other embodiments, the scan order of the field emission display panel 300 may also be from top to bottom, wherein the relevant details may be analogized by the above description and thus no ink is applied thereto.

In the above description, the present invention further provides a driving method of a field emission display panel, wherein the field emission display panel has a plurality of scanning lines. Next, please refer to the flowchart of the driving method of the field emission display panel illustrated in FIG. 4 .

First, in step S401, a clock generator is provided, wherein the clock generator is configured to generate a clock signal. Then, in step S403, a counter is provided, wherein the counter is used to count according to the clock signal to output a frame label. Then, in step S405, a frame temporary storage unit is provided, wherein the frame temporary storage unit is configured to store a plurality of graphic data or a plurality of font data, and output one of the graphic data or the font data according to the frame label. Show frame. Then, in step S407, a driving signal generating module is provided, wherein the driving signal generating module is configured to receive the display frame and generate a driving signal group according to the column of labels. The remaining details and advantages of the driving method of the field emission display panel of the present embodiment are included in the above description, and therefore will not be described here.

In summary, the present invention has the advantages of being suitable for complex jumping animation surfaces, thereby further improving the conventional field emission display technology.

Although the invention has been disclosed above by way of example, it is not intended to be limiting The scope of the present invention is defined by the scope of the appended claims, and the scope of the invention is defined by the scope of the appended claims. Prevail.

100‧‧‧ field emission display

200‧‧‧ drive circuit

210‧‧‧ clock generator

212‧‧‧counting unit

214‧‧‧Dividing unit

220‧‧‧ counter

230‧‧‧ Frame temporary storage unit

250‧‧‧Drive signal generation module

260‧‧‧ column scan driver

262‧‧‧Information enabling unit

270‧‧‧ data driver

300‧‧ ‧ field emission display panel

CLK‧‧‧ initial clock signal

DIV1‧‧‧ cycle clock signal

DIV2‧‧‧ clock signal

DL‧‧‧ data line

GL‧‧‧ scan line

PIX‧‧‧ display unit

DIOA‧‧‧ data enabling control signals

S401, S403, S405, S407, S409‧‧‧ steps

T1, T2‧‧ cycle

T _FRAME ‧‧‧ frame label

1 is a block diagram of a field emission display according to an embodiment of the present invention.

2 is a block diagram showing the driving circuit of FIG. 1.

3 is a diagram showing signal waveforms of an embodiment of the present invention.

4 is a flow chart showing a driving method of a field emission display panel according to an embodiment of the present invention.

200‧‧‧ drive circuit

210‧‧‧ clock generator

212‧‧‧counting unit

214‧‧‧Dividing unit

220‧‧‧ counter

230‧‧‧ Frame temporary storage unit

250‧‧‧Drive signal generation module

260‧‧‧ column scan driver

262‧‧‧Information enabling unit

270‧‧‧ data driver

DIOA‧‧‧ data enabling control signals

Claims (17)

A driving circuit for a field emission display panel, comprising: a clock generator for generating a clock signal; a counter coupled to the clock generator, counting according to the clock signal to cyclically output a plurality of frame labels; a frame temporary storage unit coupled to the counter for storing a plurality of pre-edited graphic data or a plurality of pre-edited font data, and outputting the graphic data according to one of the frame labels of the current frame label or One of the font data is used as a display frame, wherein the size of the display frame conforms to the display resolution of the field emission display panel; and a driving signal generating module coupled to the frame temporary storage unit, And receiving the display frame, and outputting part of the data of the display frame according to a column of labels and generating a driving signal group. The driving circuit of the field emission display panel of claim 1, wherein the driving signal group comprises a plurality of scanning signals. The driving circuit of the field emission display panel of claim 1, wherein the driving signal group comprises a plurality of data signals. The driving circuit of the field emission display panel of claim 1, wherein the clock generator comprises: a counting unit that receives an initial clock signal and according to a fixed period of counting the initial clock signal. Generating a periodic clock signal; and a frequency dividing unit coupled to the counting unit, receiving the periodic clock signal, and dividing the periodic clock signal to obtain the clock signal having a specific duty cycle. The driving circuit of the field emission display panel as described in claim 4, wherein the specific duty cycle is 50%. The driving circuit of the field emission display panel of claim 1, further comprising: a data enabling unit that receives the clock signal and generates a plurality of scan line enable signals according to the clock signal. The driving circuit of the field emission display panel as described in claim 6 further includes: a column of scanning driver having a plurality of metal oxide half field effect transistors, and controlled by the scanning line enabling signals to enable This field emits a number of scan lines of the display panel. A field emission display, comprising: a field emission display panel; and a driving circuit coupled to the field emission display panel, comprising: a clock generator for generating a clock signal; a counter coupled to the clock generator, according to the The clock signal is counted to cyclically output a plurality of frame labels; a frame temporary storage unit coupled to the counter for storing a plurality of pre-edited graphic data or a plurality of pre-edited font data, and based on the One of the frame labels outputs the graphic data or one of the font data as a display frame, wherein the size of the display frame conforms to the display resolution of the field emission display panel; a driving signal generating module coupled to the frame temporary storage unit for receiving the display frame, and outputting the portion of the display frame according to a column of labels The data is divided and a drive signal group is generated. The field emission display of claim 8, wherein the driving signal group comprises a plurality of scanning signals. The field emission display of claim 8, wherein the driving signal group comprises a plurality of data signals. The field emission display of claim 8, wherein the clock generator comprises: a counting unit that receives an initial clock signal and generates a period according to a fixed period of counting the initial clock signal. And a frequency dividing unit coupled to the counting unit, receiving the periodic clock signal, and dividing the periodic clock signal to obtain the clock signal having a specific duty cycle. The field emission display of claim 11, wherein the specific duty cycle is 50%. The field emission display of claim 8, wherein the driving circuit further comprises: a data enabling unit that receives the clock signal and generates a plurality of scan line enable signals according to the clock signal. The field emission display of claim 13, wherein the driving circuit further comprises: a column of scanning drivers having a plurality of MOS field-effect transistors, and controlled by the scanning line enable signals to enable This field emits a number of scan lines of the display panel. A driving method of a field emission display panel, comprising: Providing a clock generator for generating a clock signal; providing a counter for counting according to the clock signal to cyclically output a plurality of frame labels; providing a frame temporary storage unit for storing a plurality of pre-editing Graphic material or a plurality of pre-edited font data, and outputting one of the graphic materials or the font data according to one of the frame labels of the frame labels as a display frame, wherein the graphic data The size of the display frame is consistent with the display resolution of the field emission display panel; and a driving signal generating module is provided for receiving the display frame, and outputting part of the data of the display frame according to a column of labels and generating a driving signal group. The driving method of the field emission display panel according to claim 15, wherein the driving signal group includes a plurality of scanning signals. The driving method of the field emission display panel according to claim 15, wherein the driving signal group includes a plurality of data signals.