KR100201361B1 - Display device - Google Patents

Abstract

The present invention provides a display device capable of easily increasing the anode voltage to be applied by forming the anode electrode as a whole to obtain high brightness.

In the display device of the present invention, a cathode electrode having an emitter as an electron-emitting cathode is formed, and a first gate electrode and a second gate electrode for controlling the emission of electrons with an insulating layer interposed therebetween are formed thereon. And a transparent second substrate having an anode electrode on which three primary colors of phosphor are sequentially applied so as to face the first substrate, which is present, and which comprises a cathode electrode, a first gate electrode, and a second electrode. Each of the gate electrodes of the plurality of gate electrodes may be a plurality of Y electrode groups, a plurality of first X electrode groups, and a plurality of second X electrode groups arranged in a direction orthogonal to the Y electrode group. Y electrode drive means for scanning at a predetermined timing into the Y electrode group, first X electrode drive means for supplying a video data signal to the first X electrode group, and three primary colors of fluorescence to the second X electrode group. Of to claim 2 having the X electrode drive means for supplying a predetermined timing by a driving signal which can be selected to emit light one.

Description

Display device

1 is a diagram showing a configuration of a first embodiment of a display device of the present invention.

2 is an enlarged view of a portion of the display panel of the first embodiment;

3 is a timing chart showing a display operation of the display device of the first embodiment.

4 shows the structure of the display panel of the first embodiment;

FIG. 5 is a diagram showing the configuration of a cathode electrode and a first gate electrode of the display panel of the second embodiment. FIG.

FIG. 6 is an enlarged view of a portion of the display panel of the second embodiment; FIG.

FIG. 7 is an enlarged view of a portion of the display panel of the second embodiment; FIG.

Fig. 8 is a diagram showing the arrangement of the second gate electrodes of the display panel of the second embodiment.

9 is a timing chart showing a display operation of the display device of the second embodiment.

10 is a diagram showing the structure of a display panel in a conventional display device.

11 is a diagram showing the structure of a display panel in a conventional display device.

12 is an enlarged view of a portion of an anode substrate of a conventional display device.

* Explanation of symbols for main parts of the drawings

1: display panel 5: driver controller

6: Y scan driver 7: X data driver

8: RGB driver 9: anode driver

13,14: open hole G1-1 to Gl-320: first gate electrode

G1-R, G, B, G2-R ₁ , G ₁ , B ₁ -G2-R ₄ , G ₄ , B ₄ : second gate electrode

C ₁ -C ₂₄₀ : cathode electrode Y _1- Y ₁₂₀ : cathode driver output terminal

X _{1 to} X ₃₂₀ : First (second) gate driver output terminal

R ₁ , G ₁ , B ₁ , R ₂ , G ₂ , B ₂ : Second (first) gate driver output terminal

Q _{1 to} Q ₄ : Display area

The present invention relates to a display device, and more particularly, to a display device suitable for application to a display device using a field emission cathode as an electron source.

When the applied electric field of the metal or semiconductor surface is about 10 (V / m), the electrons pass through the barrier and electrons are released in vacuum at room temperature by the tunnel effect.

This is called field emission, and a cathode that emits electrons is called a field emission cathode.

In recent years, using semiconductor micromachining technology, it has become possible to fabricate a surface emission type field emission cathode consisting of a micron size field emission cathode. It is proposed to apply as.

10 shows an example of a display device as an example of application.

This display device (hereinafter referred to as FED) is configured such that the cathode substrate 103 on which the field emission cathode (hereinafter referred to as FEC) is formed and the anode substrate 100 on which the anode electrode is formed are arranged to face each other.

The FEC formed on the cathode substrate 103 includes a cathode electrode 104 formed by a spatter or the like, a conical emitter 105 formed on a plurality thereof, and a gate electrode 106 formed near the tip of the emitter 105. Spindt type FEC composed of).

On the other hand, a transparent electrode 101 made of, for example, conductive indium oxide (ITO) constituting an anode is formed on the anode substrate 100 disposed opposite to the cathode substrate 103, and the transparent electrode 101 is formed. Phosphor 102 is coated on the top surface).

The transparent electrodes 101-1, 101-2, 101-3 ... have a stripe shape, and the transparent electrodes 101-1, 101-4, 101-7 ... have a red color (R). Phosphor 102 is coated, and green (G) phosphor 102 is coated on transparent electrodes 101-2, 101-5, 101-8 ..., and transparent electrode 101-3. , 101-6 ...) is coated with a blue (B) phosphor 102. As described above, the fluorescent electrodes 102 of the same color are applied to the transparent electrodes 101-1 to 101-8.

The three FECs are divided and provided so that three transparent electrodes 101 provided with the phosphors of R, G, and B are provided as one group, and electrons are supplied to the groups in common.

For this reason, the cathode electrode 104 is a stripe-shaped cathode electrode 104-1, 104-2, 104-3 ... having a width of the group parallel to the transparent electrode 101, The emitter 105 and the gate electrode 106 are formed on the cathode electrodes 104-1, 104-2, 104-3.

The pitch between these emitters 105 can be 10 microns or less, and tens of thousands to hundreds of thousands of such emitters 105 can be provided on one cathode substrate 103.

In this FEC, since the distance between the gate and cathode can be submicron, electrons can be emitted from the emitter 105 by applying a voltage V _GE of only 10 volts between the gate and cathode.

In this way, the electrons emitted from the emitter 105 are collected by the transparent electrode 101 provided on the anode substrate 100 arranged on the gate electrode 106 in isolation.

Positive voltage V _A is applied to this transparent electrode 101.

In addition, since the phosphors 102 of R, G, and B are provided in the transparent electrode 101, the phosphors 102 of the R, G, and B emit light by being excited by electrons collected in the transparent electrode 101.

For this reason, a full color image can be obtained on the anode electrode which consists of the transparent electrode 101, and this image can be observed through the transparent anode substrate 100 in between.

In this case, a plurality of gate electrodes 106 are formed in a stripe shape so as to be orthogonal to the stripe cathode electrodes 104-1, 104-2, 104-3... In the case where 106 is selected, the cathode electrode 104-1 is selected, and the transparent electrodes 101-1, 101-2, and 101-3 are sequentially selected.

That is, when the transparent electrode 101-1 is selected by the electrons emitted from the emitter 105 formed on the cathode electrode 104-1, the phosphor of R is made to emit light, and the transparent electrode 101-2 is provided. Is selected so that the G phosphor emits light, and when the transparent electrode 101-3 is selected, the B phosphor emits light.

Thus, in the full-color display device shown in FIG. 10, the transparent electrode 101 which is an anode electrode is selected. Instead of scanning the anode electrode in addition to the full-color display device, the cathode electrode also has a type corresponding to phosphors of R, G, and B. This display device is shown in FIG.

In the display device shown in FIG. 11, the transparent electrode 101, which is the anode electrode formed on the anode substrate 100, is not divided but formed as a whole, and R, G is formed on the transparent electrode 101. Phosphor B is formed in a stripe pattern.

On the other hand, on the cathode substrate 103 on which the FEC is formed, the stripe-shaped cathode electrodes 110-1, 110-2, and so on correspond to R, G, and B of the phosphor 102 coated on the anode substrate 100. 110-3... Are formed, and the cathode electrodes 110-1, 110-2, and 110-3... Are respectively located near the tip of the emitter 105 and the emitter 105. The gate electrode 106 is formed in the.

The gate electrodes 106 are sequentially scanned and in synchronization with the cathodes 110-1, 110-2, 110-3..., Three phosphors of R, G, and B are applied to the transparent electrode 101. Cathode electrodes 110-1, 110-2, 110-3 having three cathode electrodes 110 corresponding to 102 as a group, cathode electrodes 110-4, 110-5, 110-6. Since.) Is selected, phosphors 102 of R, G, and B corresponding to the cathode electrode 110 of the selected group are allowed to emit light selectively.

By the way, of the above two types of display apparatuses, in the display apparatus shown in FIG. 11, since the anode electrode is not scanned, the anode voltage can be increased and the luminance can be increased, but the R of the phosphor 102 is increased. Since the cathode electrodes are provided so as to correspond to G, B, respectively, the number of driver output terminals for driving them becomes very large.

Therefore, the structure such as the terminal connection between the driver and each cathode electrode becomes complicated, and the cost also becomes high.

In addition, electrons emitted from an emitter are usually emitted with a certain spread, which may cause adjacent phosphors to leak and emit light.

In addition, it is necessary to arrange the cathode electrodes precisely aligned to the phosphors of R, G, and B formed on the anode substrate, and high production accuracy is required.

In the display device shown in FIG. 10, the transparent electrodes 101-1, 101-2, 101-3, which define the anode electrodes are provided with the transparent electrodes 101-1 of FIG. As shown in the drawing where only a part of the transparent electrode 101-2 is removed, the anode electrode lines 107-R, 107-G, and 107-B are connected, respectively, and these anode electrode lines 107-R, 107 are connected. -G, 107-B) is injected sequentially.

That is, when the anode electrode line 107 -R is selected, an anode voltage is applied to the transparent electrodes 101-1, 101-4, and when the anode electrode line 107-G is selected, a transparent electrode When the anode voltage is applied to (101-2, 101-5 ...) and the anode electrode line 107-B is selected, the anode voltage is applied to the transparent electrodes 101-3, 101-6 ... It is applied so that phosphors of R, G and B are sequentially emitted.

In this case, the non-selected anode electrode line is at ground potential, for example.

Therefore, the anode voltage that can be applied to the transparent electrode 101 is determined by the dielectric breakdown voltage between the transparent electrodes 101.

When the distance between the transparent electrode 101-1 and the transparent electrode 101-2 shown in FIG. 12 is 50 microns, for example, at such a small distance, the dielectric breakdown voltage is a transparent electrode ( The creepage distance of the surface of the anode substrate 100 on which the transparent electrode 101 is formed, rather than the insulation breakdown voltage (inter-electrode breakdown voltage) determined by the spatial distance between 101 (see FIG. 12) ( 108 is controlled by the dielectric breakdown voltage (creepage dielectric breakdown voltage).

The dielectric breakdown voltage determined by the creepage distance 108 becomes a different voltage depending on the material of the anode substrate 100. However, when the anode substrate 100 is made of Pyrex glass, it is about 50 microns between electrodes. 100 to 300 volts.

Thus, in the display device of the type shown in FIG. 10, it is difficult to raise the anode voltage which can be applied to an anode electrode, and there existed a problem that odor could not be raised.

In addition, since the width of the pulse signal for selecting the cathode electrode 110 is further divided into three, the pulse signal for selecting three transparent electrodes 101 having R, G, and B phosphors formed thereon is a duty factor. There was also a problem that the duty factor became smaller and the luminance further decreased.

As described above, in the above-described conventional FED display device, it is not possible to obtain both of them in terms of the number of driver output terminals and luminance.

Moreover, in solving the above problem, a configuration in which the structure of the FED is complicated is not preferable in view of problems such as cost and reliability of a product.

Here, in order to solve the above problems, the present invention provides a cathode electrode having an emitter as an electron-emitting cathode, a first gate electrode for controlling electron emission with an insulating layer therebetween, and And a first substrate having a second gate electrode formed thereon, and a second substrate having a transparent anode electrode on which three primary phosphors are sequentially applied to face the first substrate. On the display surface, any one of the cathode electrode, the first gate electrode, and the second gate electrode is each of a plurality of Y electrode groups arranged in stripes, and a plurality of Y electrode groups arranged in a direction orthogonal to the Y electrode group. Let it be a 1st X electrode group, and several 2nd X electrode group.

And a first X for supplying the display surface, a Y electrode driver for scanning the Y electrode group at a predetermined timing, and a video data signal capable of selectively emitting one of three primary colors of phosphor to the first X electrode group. A display device is provided with an electrode driver and a second X electrode driver for supplying a drive signal to the second X electrode group at a predetermined timing.

In addition, the display surface is divided into n display regions along the direction in which the Y electrodes are juxtaposed, and the second X electrode group is divided and arranged in correspondence for each of the divided display regions, and divided into Y electrode drivers. A drive output terminal is provided for scanning the corresponding Y electrodes in common for each of the displayed display areas, and the drive output for supplying a drive signal to the second X electrode group in common for each divided display area in the second X electrode driver. Cut the terminal.

Then, the second X electrode is arranged for each of the divided display regions by using three sets of the R electrode, the G electrode, and the B electrode corresponding to the three primary colors, respectively, and the second X electrode driver includes the R electrode and the G electrode. Each drive output terminal of R, G, and B capable of supplying a driving signal in common to each of the B electrodes is provided correspondingly for each divided display area.

In the above-described configuration, a pair of color pixel patterns in which R electrodes, G electrodes, and B electrodes corresponding to the three primary colors are formed in a stripe shape with respect to the second X electrode is set as one set, and the Y electrode or the second X electrode is At the same time, the R electrodes, the G electrodes, and the B electrodes are connected to each of the divided display regions.

In addition, the area ratio of the area indicated by the R electrode, the G electrode, and the B electrode in the color pixel pattern is formed so as to be different from each other, and the anode electrode is formed as a whole.

According to the present invention, in constructing a display device capable of color display, any one of the cathode, the first gate electrode, and the second gate electrode serving as the convergence electrode of the original emission electrons is not scanned (scanned). Each can be configured to be used as a line scanning electrode, an image data electrode, or a color pixel selection electrode, and there is no need to separately scan the scan electrode and the image data electrode corresponding to each of the phosphors of RGB as in the prior art. The number of anode driver output terminals can be omitted.

In the above configuration, the display surface is divided into n display regions, and a driver output terminal for applying a voltage to an electrode (for example, a Y electrode for line scanning) along this division direction corresponds to each divided display region. In this configuration, the number of driver output terminals connected to the electrode waves along the dividing direction of the display area is reduced to the number of electrodes / number of display areas n.

In forming the second X electrode, a color pixel pattern composed of R, G, and B pixels is formed corresponding to the intersection position of the scan electrode and the image data electrode, and these R pixels, G pixels, and B pixels are connected to each other. The R electrode, G electrode, and B electrodes are connected to each display area in a set of color pixel patterns in which the display areas are connected in the dividing direction or in which the R, G, and B electrodes are arranged in a stripe shape. This makes it possible to directly take out a line for connecting the second X electrode to the driver output terminal irrespective of the number of display area divisions, out of the display panel. Moreover, the anode electrode is shaped as a whole, so that a high voltage can be applied to the anode electrode.

EXAMPLE

Hereinafter, the first embodiment of the display device according to the embodiment of the present invention will be described with reference to FIGS.

First, the concept of the structure of the FED used for the display panel 1 of the present embodiment will be described with reference to FIG. This figure shows by cross section the part cut | disconnected by the A-A line shown in FIG. 2 mentioned later.

In FIG. 4, 101 provided on the lower surface side of the anode substrate 100 represents a transparent electrode as an anode electrode.

In the present embodiment, the transparent electrode 101 is formed as a whole, while the phosphor 102 corresponding to the three primary colors of RGB is formed in a stripe shape. On the cathode substrate 103 facing the anode substrate 100, the cathode electrode C _n is formed to be orthogonal to the phosphor 102, and the emitter 105 on the cone is formed on the cathode electrode C _n . ) Is formed. On the cathode electrode, the first gate electrodes G1-1 to G1-3 are further arranged in a stripe shape so as to be orthogonal to the cathode electrode C _n , and the emitter is formed in the open hole 14 opened in the first gate electrode. To be located.

In this embodiment, the second gate electrodes G2-R ₁ , G2-G ₁ , and G2-B ₁ serving as convergence electrodes are formed so as to correspond to the phosphors 102 of RGB on the respective first gate electrodes. The holes 13 are respectively provided and open holes 13 are formed in correspondence with the positions where the emitters are formed in these second gate electrodes.

Next, the configuration of the display device of this embodiment will be described with reference to FIGS. 1 and 2. FIG.

However, the display device of the present invention does not scan (scan) the anode electrode, and any of the second gate electrode serving as the cathode electrode, the first gate electrode, and the convergence electrode of the emission electrons is a line scanning electrode (Y electrode). ), An image data electrode (first X electrode) for supplying a voltage corresponding to the image data, and a color pixel selection electrode (second X electrode) for selecting a color pixel of RGB. In this embodiment, the cathode electrode is used as the line scanning electrode (Y electrode), and the first gate electrode is used as the image data electrode (first X electrode) and the second gate electrode (second X electrode) is colored. After the configuration with the pixel selection electrode will be described.

1 shows the configuration of the entire display device of this embodiment.

In addition, in the display panel 1 of FIG. 1, the illustration of the anode substrate 100, the transparent electrode 101, and the phosphor 102 shown in FIG. 4 is omitted.

The method of claim 1 1 is a display panel constituted by the FED, if there is a cathode electrode 240 of the C ₁ ~C ₂₄₀ are arranged in a stripe shape as a Y electrode (scan electrode lines).

The first gate electrodes G1-1 to G1-320, which are the first X electrodes (image data electrodes), are arranged in a stripe shape so as to be perpendicular to these cathode electrodes.

Further, in the display panel 1, as described in FIG. 4, each of the three second gates as the second X electrode (pixel selection electrode) is formed so as to correspond to the phosphor 102 of RGB on the upper side of each first gate electrode. An electrode is formed.

That is, with respect to each of the first gate electrodes G1-1 to G1-320, as shown in the drawing, three sets of second gate electrodes are respectively formed of three G2-R ₁ , G2-G ₁ , and G2-B ₁ . It is arranged in the same direction as the gate electrode.

Here, the arrangement state of the second gate electrode is enlarged and shown in FIG. 2.

This figure shows, in the display panel 1, a and shows an enlarged view in the vicinity of the crossing with the first gate electrode (G1-1~ G1-3) a cathode electrode ₍₁₁₉ C, _12O C, ₁₂₁ C), The same parts as in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

As can be seen from this figure, the second gate electrodes G2-R ₁ , G2-G ₁ , G2-B ₁ are striped in the same direction on the first gate electrodes G1-1 and G1-2. It is arranged.

In this case, the open hole 13 of the second gate is formed, for example, as shown at the intersection of the cathode electrode C ₁₁₉ and the first gate electrode G1-1 in the drawing, and the other cathode is not shown. Similarly formed at the intersection of the electrode and the first gate electrode, these intersections are formed of pixels of R, G, and B, and form one cycle capable of color expression.

Thus, the display panel 1 of this embodiment is comprised.

1, 2 shows an input terminal to which an image data signal is input. 3 is an image input circuit. For example, based on the image data signal supplied from the image input terminal 2, the data necessary for controlling image display is transferred to the CPU 4 and the X data driver 7 An operation such as outputting image data for controlling the Y scan driver 6 and the RGB driver 8 to the driver controller 5 is performed.

4 is a CPU that performs processing such as control relating to image display scanning described later.

5 is a driver controller, and the timing of applying the scan voltage of the Y scan driver 6 and the X data driver 7 and the RGB driver (in accordance with the image data from the image input circuit 3 or the control timing by the CPU 4) The timing of application of the data voltage according to the image data with 8) is controlled. The anode voltage output of the anode driver 9 can also be controlled.

6 indicates a Y scan driver, and outputs a scanning voltage to each of the cathode electrodes C _{1 to} C ₂₄₀ serving as the Y electrodes at a predetermined timing under the control of the driver controller 5 described above. And, in this embodiment, the C ₁ ~C thereof corresponding to the number of electrodes of cathode ₂₄₀ to 240, and 240 cathode driver output terminal installation of Y ₁ to Y ~ _24O As shown in the figure, each cathode (C ₁ ~C ₂₄₀ ) Is connected.

7 is an X data driver for applying an image data voltage. In this case, as shown in the drawing, first gate driver output terminals X _{1 to} X ₃₂₀ are provided, and the first gates G1-1 to G1-320 and Connected.

Therefore, in the present embodiment, image data for display is displayed at terminals corresponding to the first gate electrodes x _{1 to} x _n that become the first X electrodes at a predetermined timing under the control of the driver controller 5. It is output as a voltage corresponding to a pixel.

Alternatively, the image data may be supplied by pulse width modulation (PWM) or the like.

8 indicates an RGB driver for applying a voltage for color pixel selection to the second gate electrode serving as the second X electrode, in which case the second gate driver R ₁ , G ₁ , B ₁ as shown in the figure. The output terminal is installed. Of these second gate driver output terminals, R1 is commonly connected to each of the second gate electrodes G2-R ₁ , G2-R _l ..., Corresponding to R of the phosphor. The second gate driver output terminals are commonly connected to the second gate electrodes G2-G ₁ , G2-G ₁ ..., and G2-B ₁ , G2-B ₁ ..., respectively.

These second gate driver output terminals output drive voltages according to the timing and predetermined order described later, and select color pixels for each of R, G, and B to sequentially output display screen colors.

9 is an anode driver for controlling an anode voltage applied to the anode electrode, but in this embodiment, as described above, the anode electrode (transparent electrode 101) is formed as a whole so as not to perform scanning (or switching). You can omit it for this purpose.

Next, with reference to the timing charts of Figs. 3A to 3H, the display of the display device of this embodiment with the above configuration will be described.

In this figure, the driving voltage of each of the second gate driver output terminals R ₁ , G ₁ , B ₁ of the RGB driver 8, and the Y scan driver 6 over one frame period indicated by T is shown. The output of the scan voltage of each cathode driver output terminal and the timing of the data output of the X data driver 7 are respectively displayed.

For example, at the beginning of one frame period, as shown in FIG. 3 (a), T / divided by three frame periods T from the second gate driver output terminal B ₁ of the RGB driver 8 The drive voltage is output as indicated by the periods t _{1 to} t ₂ over the time length indicated by three. That is, only G2-B ₁ , G2-B ₁ ..., Corresponding to the B pixel of the second gate electrode are driven. Further, the output period of the driving voltage of the other second gate driver output terminals R ₁ and G ₁ shown in FIG. 3 (b) and (c) also becomes the time length of T / 3.

And, the second in the gate driver output terminal of the output period _{B 1 (t 1 ~t 2)} , FIG. 3 (d) ~ (g) a cathode driver output terminal, as shown in an enlarged view (Y ₁ ~Y _The scan voltage is sequentially output to ₂₄₀ ), and the line scan of the cathode electrode is performed.

Moreover, although the scanning voltage shown in these 3d (d)-(g) is made into the constant voltage, when it is a negative voltage, it is preferable to comprise so that scanning may be performed.

For example, in the periods t _{1 to} t ₁₁ in which the scanning voltage is output from the cathode driver output terminal Y ₁ shown in FIG. 3 (a), as shown in FIG. Similarly, the voltage corresponding to the image data is simultaneously outputted by 320 pixels from the first gate driver output terminals X _{1 to} X ₃₂₀ of the X radar driver 7.

In addition, as shown in FIGS. 3E through 9 and H, the period (t _{11 to} t ₁₂ ) during which the scan voltage is supplied by the remaining cathode dry output terminals Y _{2 to} Y ₂₄₀ . , t _{12 to} t ₁₃ -t _{14 to} t ₂ , similarly, a voltage corresponding to one line of pixel data is output from the first gate driver output terminals X _{1 to} X ₃₂₀ .

However, in the FED in which the second gate electrode is provided in addition to the first gate electrode as in the present embodiment, even when a voltage is simultaneously applied to the cathode electrode and the first gate electrode corresponding to a certain pixel, convergence is performed. If the driving voltage supplied to the second gate electrode serving as the electrode is zero or negative, the electric field strength becomes weak, so that electrons are not emitted from the emitter 105 (shown in FIG. 4).

Thus, for example, as in the periods t _{1 to} t ₁₁ , the scanning voltage is output from the cathode driver output terminal Y ₁ , and at the same time, image data from the first gate driver output terminals X _{1 to} X ₃₂₀ . In the period in which the voltage is supplied, the cathode electrode C ₁ is scanned and the image data is being supplied. In this case, the second gate electrode driven by the RGB driver 8 is G2-. B ₁ , G ₂ -B ₁ ..., Electron emission according to the image data voltage is made only in the emitters formed corresponding to these positions.

The electrons thus emitted impinge on the anode electrode, but the second gate electrode emits the phosphor 120 of B which is provided corresponding to the positions of G2-B ₁ and G2-B ₁ , and thus, the cathode electrode. (C ₁ ) The line display for the color pixel of "B" is performed from above.

Then, in the periods t _{1 to} t ₂ during which the driving voltage is supplied from the driver B ₁ of the RGB driver 8, as shown in FIGS. 3E to 3G, the cathode driver output terminal. By (Y _{2 to} Y ₂₄₀ ), the line scan is performed to the remaining cathode electrodes and the image data voltage is applied to the first gate electrode as shown in FIG. 3 (h). Similarly, color display of "B" is performed as a result of line display of only the "B" pixel with respect to the cathode electrodes C _{2 to} C ₂₄₀ .

In the next period t _{2 to} t ₃ , for example, as shown in FIG. 3B, a driving voltage is output from the dryer output terminal R ₁ in the RGB driver 8.

Also within this period, the Y scan driver 6 scans the cathode electrodes C _{1 to} C ₂₄₀ at the timing shown in FIGS. As shown in Fig. 8, the X data driver 7 also applies a voltage corresponding to the image data to the first gate electrode.

Since the driver output terminal R ₁ supplies the driving voltage in common to the second gate electrodes G2-R ₁ , G2-R ₁ ..., Corresponding to the color pixel of "R", By the same operation, line scanning (color screen display) for the color pixel of "R" is performed.

In the next period t _{3 to} t ₄ , the driving voltage is output from the driver output terminal G 1 of the RGB driver 8 as shown in FIG.

Also within this period, the result of supplying the image data voltage to the cathode electrode scan shown in Figs. 3 (d) to (g) and the first gate electrode shown in Fig. 3 (h) as described above. The color screen display for "G" is performed.

Thus, each color screen display of "B", "R", and "G" is performed sequentially, and color image display of one frame is completed, and operation | movement is repeated in this frame period T. As a result, color image display is performed sequentially in the plane by division display.

Further, in the above configuration, the color screen display is performed in the order of "B"-"R"-"G", but it is also conceivable to display the color screen in accordance with another order pattern.

For example, if the display device is to be displayed with the same pixel number of RGB as the present embodiment by the configuration of the display device shown in the conventional example, the portion corresponding to the RGB driver 8 is unusable. However, it is necessary to etch the cathode electrodes according to the respective phosphors of RGB, and the number of cathode electrodes is

320 × 3 = 960

As indicated by 960, a very large number is required, and accordingly, the driver output terminal of the X data driver 7 must also have the number of terminals of 960.

On the other hand, when the second gate electrode is provided on the first gate electrode as in the present embodiment, and thus configured to select a pixel, the R ₁ , G ₁ , B ₁ and 3 terminals as the driver output terminal of the RGB driver 8 are configured. Although necessary, the number of driver output terminals of the X data driver 7 can be significantly reduced from 960 to 320 of 1/3.

In addition, in the present embodiment, since the anode electrode (transparent electrode 101) is formed as a whole, a high voltage can be applied, so that high odor can be easily achieved.

In addition, since the second gate electrode shaped in the present embodiment has a function of converging electrons emitted from the emitter 105, color loss and the like are eliminated, and it is also easy to increase the resolution of the display image.

In addition, the configuration of the display device of this embodiment is not limited to this, and various modifications are possible. For example, in the above embodiment, the cathode electrode is used as the line scan electrode and the first gate electrode as the image data electrode, and the second gate is used. Although the electrode is a color pixel selection electrode, this is only one example. As described above, the present invention can arbitrarily change these combinations between the cathode electrode and the first and second gate electrodes. A total of six combinations are obtained.

Next, a second embodiment will be described with reference to FIGS. 5 to 9.

In the second embodiment, the display area is divided into three or more so as to reduce the total number of driver output terminals and to have a structure in which the structure of the FED does not become a three-dimensional wiring.

In the present embodiment, for example, when the number of cathode electrodes is 240 and the number of first gate electrodes is 320, as in the previous embodiments, the display panel 1 is divided into four display regions. Explain. In the present embodiment, the overall configuration of the cathode electrode C and the first gate electrode Gl of the display panel 1 is schematically shown in FIG.

As shown in this figure, the display panel 1 is divided into four display areas Q ₁ to Q ₄ by the dividing lines P _{1 to} P ₃ , and for each display area Q _{1 to} Q ₄ . , C _{1 to} C ₆₀ , C _{6 1} to C ₁₂₀ , C ₁₂₁ to C ₁₈₀ , and C ₁₈₁ to C ₂₄₀ cathode electrodes are assigned. And Y scanning driver 6 has a cathode driver output of the Y ₁ ~Y _{60 60} terminal, and to a corresponding one the cathode electrode of each display area are connected in common.

6 and 7, the structure of the display panel 1 of this embodiment will be described.

6 shows an enlarged part of the display panel 1 (in addition, a part of the display area Q ₁ is shown here along with FIG. 7 to be described later) to enlarge the cathode electrode C and the first electrode. a diagram illustrating the structure of the gate electrode (G _1).

As shown in this figure, for example, the first gate electrode Gl is formed so as to be orthogonal to the cathode electrode C above the cathode electrode C arranged in the horizontal direction.

At the intersections thereof, the open-holes 14 formed in the first gate electrode G ₁ are gathered, and for example, four color pixels are described, which are provided once for each color unit. And a color pixel pattern 30 shown in broken lines.

In the present embodiment, the structure of the cathode electrode C and the first gate electrode G ₁ formed as shown in FIG. 6 is superimposed so that the second gate electrode G ₂ having the structure shown in FIG. This is formed.

That is, in the color pixel pattern 30, the R pixel electrode 21-R, the R pixel electrode 21-R, and the G pixel electrode 21 each having an opening 13 to correspond to each of the four pixel parts. -G) and four pixel electrodes consisting of the B pixel electrodes 21-B are arranged, and the R pixel electrodes 21-R are connected to one another along the arrangement direction of the cathode electrode C as shown in the drawing. It forms, and this becomes one 2nd gate electrode G2-R corresponding to R. As shown in FIG. In the color pixel patterns 30 that are closely adjacent to each other, the G pixel electrodes 21 -G are connected to each other to form one second gate electrode G2-G ₁ , and the pixel patterns 30 that are closely adjacent to each other. ) B pixel electrodes 21 -B are connected to each other to form one second gate electrode G2-B ₁ . The lead lines for connecting to the driver output terminals G ₁ , R ₁ , B ₁ of the RGB driver 8 are arranged in the transverse direction with respect to the respective first gate electrodes as shown on the left side of this figure. Make a withdrawal.

The second gate electrode having such a configuration is formed so as to correspond to the arrangement of the cathode electrodes C. FIG.

Although not shown, the anode electrode provided above the second gate electrode is formed as a whole, and the phosphor of RGB is further provided corresponding to the arrangement of the pixel electrodes shown in FIG.

Furthermore, two R pixel electrodes 27-R are provided in the one set of color pixel patterns 30 of this embodiment. That is, the area of R in the three primary colors is set to twice the other G and B areas in one time, when the luminous efficiency of the corresponding phosphor is taken into consideration, the area of the R pixel 21-R in another time is obtained by the other G. It is advantageous in the aspect of white balance etc. that it comprised so that it might become larger than the color pixel of B.

The ratio of the area of the color pixels is not limited to this, and it is possible to change the area and the like of each color electrode according to various conditions.

FIG. 8 schematically shows the arrangement of the second gate electrode G2 in the display panel 1 of this embodiment, and G2-R ₁ , G ₁ , B ₁ , G2-R ₂ , G ₂ , B _2, and _{G2-R 3, G 3,} B 3, G2-R 4, G 4, B 4 respectively showing a second gate electrode corresponding to each display area (Q ₁ ~Q _4).

Also, 8 is subject to, respectively, a three-terminal, as shown for example RGB driver of the present embodiment corresponding to the four display areas as shown in the drawing R _1, and _{G 1, B 1 ~R 4,} G 4, B 4 1 4 twos It has a total of 12 second gate driver output terminals that have been set-etched.

For example, the configuration of the second gate electrode shown in FIG. 7 corresponds to each cathode electrode when viewed as a whole, and three sets of second gate electrodes of R, G, and B (bundled by dashed lines in the drawing are shown). ) Can be considered to be disposed in the transverse direction corresponding to each cathode electrode.

Therefore, as shown in this figure, a line for connecting to the RGB driver 8 from each second gate electrode can be directly drawn out in the horizontal direction, for example, in addition to the display panel 1, and the display area as shown in the figure. Each of the second gate electrodes G2-R ₁ , G ₁ , B ₁ of Q ₁ is commonly connected to the second gate driver output terminals R ₁ , G ₁ , B ₁ , Each of the second gate electrodes G2-R ₂ , G ₂ , B _{2 to} G ₂ -R ₄ , G ₄ , and B ₄ of the display areas Q ₂ , Q ₃ , and Q ₄ is connected to the second gate driver output terminal R _2. , G ₂ , B ₂ to R ₄ , G ₄ , and B ₄ ) are commonly connected to each other.

Thus, by forming the second gate electrode for color pixel selection and connecting lead wires as described above, the stacked wiring structure in the display panel 1, i.e., the FED, requires a complicated and difficult process. There is no need to do it.

Also in the present embodiment, as described above, the anode electrode (not shown) is formed as a whole, and high odor can be obtained by applying a high voltage to the anode electrode.

Next, the display operation of the display value of the present embodiment will be described with reference to the timing chart of FIG.

For example, in the t ₀ to t ₁ period, which is the time length of the first T / 12 of one frame display period T, as shown in Figs. 9 (h) to (k), the angles of the Y scan driver 6 are shown. Scan voltages are sequentially supplied from the cathode fiber output terminals Y _{1 to} Y ₆₀ , and in this case, the image data voltage is applied from the X data driver 7 to the first gate electrode as shown in FIG. 9 (m). . As a result, for each of the corresponding cathode electrodes C _{1 to} C ₆₀ , C ₆₁ to C ₁₂₀ , C ₁₂₁ to C ₁₈₀ , and C ₁₈₁ to C _{240 of} each display area Q _{1 to} Q ₄ shown in FIG. Line scanning (pixel selection) is performed. In this period t _{0 to} t ₁ , however, as shown in Fig. 9A, since the output is made only from the second gate driver output terminal R ₁ from the RGB driver 8, Only the R pixels 21-R of the display area 01 are selectively driven to display only the color screen display of "R" by scanning the "R" line in the display area Q1, and display is not performed in the other display area. Do not.

Then, as shown in Figs. 9B and 9D, drive outputs (each T / 12 hours length) are sequentially made from the second gate driver output terminals R ₂ , R ₃ , and R ₄ . In the meantime, as described with reference to FIGS. 9 (h) to (m), the selection is performed by the matrix of the cathode electrode and the first gate electrode, and the line scan of "R" is also performed in the display area Q ₁ . The display scanning of R pixels for one screen is completed.

Subsequently, as shown in Fig. 9 (e) (f) (g), the second gate driver output terminals G ₁ → G ₂ ˜ (→ G ₃ → G ₄ → B ₁ → B ₂ → B ₃ → ) sequentially from the B ₄ (T / 12 by the length of time), the driver output is made, FIG. 9 is performed is supplied to the scan line and the image data shown in (h) ~ (m) in each period.

In this manner, when the scanning of the G pixels for one screen is completed, the scanning of the B pixels is completed, and color display of one frame is performed when the one frame display period T has elapsed.

Since the present invention is configured as described above, the number of driver output terminals of the display device can be reduced, thereby reducing the complexity of the structure and the high cost, and focusing the emission electrons from the emitter by the second gate electrode. In addition to this, it is possible to apply the high voltage by forming the anode electrode as a whole, and thus has the effect that high saturation and high resolution are realized and a high quality resplay device can be constructed.

In addition to the arrangement arrangement of electrodes for color pixel selection, the RGB driver and the lines connecting them can be directly drawn out of the display panel, thereby eliminating the need for the FED as a display panel to have a three-dimensional structure.

As a result, the manufacturing of the FED is not complicated, and it has the effect that the simplification of the manufacturing process, the suppression of the cost, and the improvement of the reliability are realized.

Further, in the present invention, it is possible to change the area of each area of RGB in one pixel pattern, for example, so that the area of the R pixel corresponding to the phosphor of R having poor luminous efficiency is wider than that of the G and B pixels. This has the effect that the luminance of R can be easily improved.

Claims (11)

A cathode electrode on which an emitter as an electron-emitting cathode is formed, a first gas on which a first gate electrode and a second gate electrode are formed to control emission of electrons with an insulating layer interposed therebetween, A second transparent substrate having an anode electrode on which three primary colors of phosphor are sequentially applied to face the first substrate, wherein the cathode electrode, the first gate electrode, and the second gate electrode are provided. Are respectively a plurality of Y electrode groups arranged in a stripe shape, a plurality of first X electrode groups arranged in a direction orthogonal to the Y electrode group, and a plurality of second X electrode groups, Y electrode drive means for scanning the Y electrode group at a predetermined timing, first X electrode drive means for supplying a video data signal to the first X electrode group, and the second X electrode A display device, characterized in that includes the X electrode drive means for supplying a second predetermined drive signal to select one light-emitting timing of the phosphors of the three primary colors. The display panel according to claim 1, wherein the display surface is divided into n display regions so that the dividing line is inclined along the direction in which the Y electrodes are juxtaposed, and the second X electrode group is corresponding to each of the divided display regions. The Y electrode drive means has a drive output terminal for scanning the corresponding Y electrodes in common for each of the divided display regions, and the second X electrode drive means has the divided display regions. And a drive output terminal for supplying a driving signal in common to the second X electrode group. The display panel of claim 1 or 2, wherein the second X electrode is arranged in each of the divided display regions by using three of the R electrode, the G electrode, and the B electrode corresponding to the three primary colors, respectively. The X electrode drive means of 2 is characterized in that each drive output terminal of R, G, B capable of supplying a driving signal in common to each of the R electrode, G electrode, and B electrode is provided corresponding to each of the divided display regions. Display device. The Y electrode or the third electrode according to claim 1 or 2, wherein the second X electrode comprises one set of color pixel patterns in which R electrodes, G electrodes, and B electrodes corresponding to three primary colors are formed in a stripe shape. A display apparatus, wherein the R electrodes, the G electrodes, and the B electrodes are connected to each of the divided display regions while being arranged in the same direction as any of the X electrodes of the two. The display apparatus according to claim 4, wherein the color pixel pattern is formed so that at least one area ratio of the area indicated by the R electrode, the G electrode, and the B electrode is different. The display device according to claim 1 or 2, wherein the anode electrode is integrally formed as a whole. 4. The Y electrode or the second X electrode according to claim 3, wherein the second X electrode comprises one set of color pixel patterns in which R electrodes, G electrodes, and B electrodes corresponding to three primary colors are formed in a stripe shape. And the R electrodes, the G electrodes, and the B electrodes which are arranged in the same direction as in any one of the above, and are connected to each of the divided display regions. The display device according to claim 3, wherein the anode electrode is integrally formed as a whole. The display device according to claim 4, wherein the anode electrode is integrally formed as a whole. The display device according to claim 5, wherein the anode electrode is integrally formed as a whole. The display device according to claim 7, wherein the anode electrode is integrally formed as a whole.