JP3863417B2 - Driving method of flat display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a driving method of a flat display device that employs line sequential driving, and more particularly to a driving method of a flat display device that causes display unevenness due to scanning wiring resistance.
[0002]
[Prior art]
In recent years, various flat display devices have been developed as next-generation light-weight and thin display devices that replace cathode ray tubes (hereinafter referred to as CRT). Such flat display devices include a liquid crystal display (hereinafter referred to as LCD) that controls the intensity of light using the orientation of liquid crystal, and a plasma display panel (hereinafter referred to as PDP) that emits phosphors by ultraviolet rays of plasma discharge. Display device utilizing electroluminescence (EL) phenomenon of phosphor, field emission display (hereinafter referred to as FED) for emitting phosphor by electron beam of field emission electron emitter, surface conduction electron emitter There is a surface conduction emission display (hereinafter referred to as SED) that emits a phosphor with an electron beam.
[0003]
As an image display method of these flat display devices, it is the simplest method to drive line-sequentially using a large number of scanning wirings and signal wirings arranged in a matrix. A so-called matrix-type surface display device using such a driving method usually includes a large number of scanning wirings and a large number of signal wirings extending in a direction perpendicular to the scanning wirings. A pixel portion is defined at each intersection. Each pixel portion is provided with an image display element and connected to the scanning wiring and the signal wiring.
[0004]
The scanning wiring supplies a control voltage from the scanning line driving circuit to each image display element, and the signal wiring supplies a display signal voltage from the signal line driving circuit to each image display element. For example, in a surface display device using a field emission type electron-emitting device as an image display device, when a voltage is applied to the electron-emitting device from a scanning wiring and a signal wiring, electrons are emitted from the electron-emitting portion. The emitted electrons excite the phosphors formed on the opposed substrates to emit light. The amount of electrons emitted in the field can be controlled in accordance with the applied voltage or voltage application time to adjust the light emission luminance.
[0005]
In the above-described line-sequential driving, one image is decomposed into images for each pixel display element on the scanning wiring, and only a certain scanning wiring is selectively driven, and at the same time, the display signal decomposed for each scanning wiring on the signal wiring. The voltage is output and a voltage is applied to the selected pixel display element. This is a driving method in which an image is displayed by sequentially performing this operation for all the scanning wirings and driving the pixel display elements. Since the mechanism is simple, it is used in FEDs and SEDs that do not have a memory mechanism, LCDs that do not use thin film transistors, and the like.
[0006]
[Problems to be solved by the invention]
In a flat panel display device in which a large current flows through a wiring during image display such as SED, a current flows from a pixel display element driven and displayed on the scanning wiring to a scanning wiring selected by line sequential driving, and the scanning wiring itself Due to the resistance component and the flowing drive current, a voltage drop is caused in the scanning wiring portion.
[0007]
When a voltage drop occurs in the scanning wiring, the driving voltage applied to each pixel display element on the scanning wiring decreases according to the voltage drop at each location. Therefore, the pixels farther from the drive driver are darker and the image becomes uneven.
[0008]
For example, as shown in FIG. 11, in a flat display device having a rectangular display region, a scanning wiring extending in the horizontal direction, and a scanning line driving circuit provided on the right side of the screen, Consider the case where half is black and the others are white. In this case, since the scanning line driving circuit is arranged on the right side of the screen, in the upper half of the screen in the white region, that is, the region where the pixel display element shines and current flows into the scanning wiring, As you go to, the screen will become darker due to the voltage drop.
[0009]
Similarly, in the lower half area of the screen, the screen becomes darker due to a voltage drop as it goes from the center of the screen to the left side. However, in the lower half area of the screen, there is a black area on the right half, that is, an area where the pixel display element does not shine and current does not flow, so the voltage drop is smaller than that in the upper half area of the screen. As a result, despite the same white region, a luminance difference is generated between the upper half surface and the lower left half surface of the screen, and a clear boundary line appears at the boundary portion.
[0010]
Such a problem caused by the voltage drop of the scanning wiring can be improved by designing the scanning wiring resistance to be low, but the low resistance design has a technical limit in mass production.
[0011]
The present invention has been made in view of the above points, and an object thereof is to provide a driving method of a flat display device capable of reducing display unevenness due to wiring resistance and improving image quality.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, a driving method of a flat display device according to an aspect of the present invention includes a plurality of signal wirings and a plurality of scanning wirings arranged in a matrix, and each intersection of each signal wiring and the scanning wiring. And a pixel display element provided in each pixel unit, and the pixel unit is driven by a driving voltage applied to the scanning wiring and a display signal voltage applied to the signal wiring. In a driving method of a flat display device for displaying an image,
Within one image frame period, a line driving is performed in which a driving voltage is sequentially supplied to each scanning wiring in a scanning driving period obtained by dividing the image frame period by the number of scanning wirings, and an image is displayed.
When a driving voltage is applied to at least one scanning wiring, in addition to the selected scanning wiring, a driving voltage for displaying an image is simultaneously applied to one or more other scanning wirings adjacent to the selected scanning wiring. In addition, a driving voltage smaller than a driving voltage when driving only with the selected scanning wiring is applied to the selected scanning wiring .
[0013]
According to the driving method having the above configuration, since the driving voltage is divided and supplied to the plurality of scanning wirings, the current flowing through one scanning wiring at the same time decreases, and the influence of the voltage drop of each scanning wiring is improved. be able to.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a driving method of a flat display device according to an embodiment of the present invention will be described in detail with reference to the drawings.
First, as a flat display device adopting the driving method according to the present embodiment, an SED provided with a surface conduction electron-emitting device will be described as an example.
[0015]
As shown in FIG. 1 and FIG. 2, this SED includes a transparent rectangular insulating substrate, for example, a back substrate 1 and a front substrate 2 made of a glass plate, and these substrates face each other with a predetermined gap. Has been placed. The back substrate 1 and the front substrate 2 are joined to each other through a rectangular frame-shaped side wall 3 made of glass to constitute a flat rectangular vacuum envelope 4.
[0016]
A phosphor screen 6 is formed on the inner surface of the front substrate 2. The phosphor screen 6 is configured by arranging red, blue, and green phosphor layers and a black colored layer. These phosphor layers are formed in stripes or dots. On the phosphor screen 6, a metal back 7 that functions as an anode electrode made of aluminum or the like is formed. During the display operation, a predetermined anode voltage is applied to the metal back 7.
[0017]
The substantially rectangular frame-shaped side wall 3 that functions as a joining member is sealed to the peripheral edge of the back substrate 1 and the peripheral edge of the front substrate 2 by, for example, a sealing material 9 to join the front substrate and the back substrate together. Yes.
[0018]
A plate-like grid 20 is disposed between the back substrate 1 and the front substrate 2 and faces the back substrate 1 and the front substrate 2 substantially in parallel with a gap. In the grid 20, an electron beam passage hole 22 is formed at a position facing the electron-emitting device 8 provided on the back substrate 1.
[0019]
A large number of spacers 10 each formed in a plate shape or a column shape are arranged between the back substrate 1 and the front substrate 2 in order to maintain a space between the substrates. These spacers 10 are attached to the grid 20 in a state of being positioned at predetermined positions. Then, both ends of the spacer 10 are in contact with the back substrate 1 and the front substrate 2, respectively, thereby supporting the atmospheric pressure load acting on these substrates and maintaining the distance between the substrates at a predetermined value.
[0020]
As shown in FIGS. 3 and 4, on the inner surface of the back substrate 1, a large number of scanning wirings 30 extending in parallel to each other and a large number of signal wirings 40 extending in a direction orthogonal to the scanning wirings are formed. . 480 scanning wirings 30 and 640 × 3 signal wirings 40 are provided, and wiring pitches are 900 μm and 300 μm, respectively.
[0021]
Further, the right end of each scanning wiring 30 is connected to the scanning line driving circuit 32, and the upper end of each signal wiring 40 is connected to the signal line driving circuit 42. The scanning line driving circuit 32 supplies a driving voltage for driving and controlling an electron-emitting device described later to the scanning wiring 30, and the signal line driving circuit 42 supplies a display signal voltage to the signal wiring 40.
[0022]
In the display area 34 indicated by a two-dot chain line in FIG. 3, a pixel portion 50 is defined at each intersection of the scanning wiring 30 and the signal wiring 40, and the phosphor layer of the phosphor screen 6 is excited in each pixel portion. An electron-emitting device 8 that emits an electron beam is provided as a pixel display device. 640 × 3 electron emitting elements 8 are provided along each scanning line 30 and 480 along each signal line 40.
[0023]
As shown in FIGS. 4 and 5, each electron-emitting device 18 is configured as a surface conduction type electron-emitting device. That is, each electron-emitting device 18 includes a conductive thin film 25 and a pair of device electrodes 27 and 28 that are connected to the scanning wiring 30 and the signal wiring 40 and apply a voltage to the conductive thin film. In the center of the conductive thin film 25, an electron emission portion 26 made of a minimal crack is formed.
[0024]
When a driving voltage is applied from the scanning line driving circuit 32 to the device electrode 27 through the scanning wiring 30, and a display signal voltage is applied from the signal line driving circuit 42 to the device electrode 28 through the signal wiring 40, the electron emission unit 26 A current flows due to the field emission electrons, and part of the current flows to the phosphor screen 6 to excite the phosphor to emit light.
[0025]
The electron-emitting device 8 has a monotonously increasing characteristic in which the light emission luminance increases as the voltage applied between the device electrodes 27 and 28 increases. Therefore, the electron-emitting device 8 controls the amount of electrons emitted in the field according to the magnitude of the voltage applied to the device electrodes 27 and 28, or the voltage application time, and adjusts the light emission luminance of the phosphor. Can do.
[0026]
Next, a driving method of the SED configured as described above will be described in detail.
First, general line-sequential driving will be described. As shown in FIG. 6, for example, the scanning wiring 30 is supplied with a driving voltage one by one in order from the top, and is in a driving state. A display signal voltage for each scanning wiring is sent to the signal wiring 40, and the electron-emitting device 8 to which the driving voltage and the display signal voltage are applied emits electrons, thereby forming an image.
[0027]
When driving the electron-emitting device 8 connected to the N-th scanning wiring 30 from the top, a driving voltage V100 that can drive the electron-emitting device with 100% brightness is applied only to the N-th scanning wiring and other scanning is performed. A driving voltage V0 for driving the electron-emitting device with 0% brightness is applied to the wiring. At this time, if a display signal voltage of 100% is input to all the signal lines 40, the pixels on the Nth scanning line 30 shine with 100% brightness, and the pixels on the other scanning lines are It glows at 0% brightness. Here, the brightness is described as 0% for the sake of convenience, but in reality, the pixels often shine slightly even at V0, and 100% and 0% are notation used conceptually.
[0028]
On the other hand, in the driving method according to the present embodiment, as shown in FIG. 7, when the N-th scanning wiring 30 is selected, the electron-emitting device 8 is 50% brighter in the N-th scanning wiring. A driving voltage V50 for driving the electron-emitting device 8 is applied to the N−1th and N + 1th scanning wirings adjacent to the upper and lower sides thereof at the same time.
[0029]
In other words, the driving method for displaying the image display by the electron-emitting device 8 connected to the Nth scanning wiring 30 with the electron-emitting device connected to the adjacent N−1th and N + 1th scanning wirings being replaced by half. It has become.
[0030]
The driving voltage applied to the selected Nth scanning wiring is set to be smaller than the driving voltage applied when only the Nth scanning wiring is driven to display an image. A drive voltage equal to or lower than the drive voltage applied to the selected Nth scan line is applied to the (N−1) th and N + 1th scan lines adjacent to the scan line.
[0031]
As a result, the current generated in the Nth scanning wiring 30 is almost halved compared to the case shown in FIG. 6, and the influence of the voltage drop in the scanning wiring described above can be halved. In other words, since the scanning wiring current that causes a voltage drop in the scanning wiring 30 is divided and supplied to two scanning wirings, the effect of reducing the resistance of the scanning wiring can be obtained.
[0032]
FIG. 8 shows a driving method according to another embodiment of the present invention. According to this embodiment, when the Nth scanning wiring 30 is selected, the driving voltage V50 for driving the electron-emitting device 8 with 50% brightness is applied to the Nth scanning wiring, and at the same time, A driving voltage V50 for driving the electron-emitting device 8 with 50% brightness is also applied to the N + 1-th scanning wiring adjacent thereto. That is, an image to be displayed by the electron-emitting devices connected to the Nth scanning wiring 30 is displayed in half by the electron-emitting devices respectively connected to the Nth and N + 1th scanning wirings 30.
[0033]
Also in this driving method, the current generated in the Nth and (N + 1) th scanning wirings 30 is almost halved compared to the case shown in FIG. 6, and the influence of the voltage drop in the scanning wirings can be halved. In other words, since the scanning wiring current that causes the voltage drop in the scanning wiring 30 is divided and supplied to the two scanning wirings, the effect of reducing the resistance of the scanning wiring can be obtained.
In the other embodiments described above, similar effects can be obtained by using the (N−1) th scanning wiring instead of the (N + 1) th scanning wiring 30.
[0034]
In the driving method according to the above-described embodiment, the maximum value of the driving voltage applied to each scanning wiring 30 is V50, and the electron-emitting device 8 is driven with a smaller voltage than V100 of normal line sequential driving. Can do. This can bring advantages such as cost reduction of the scanning line driving circuit 32 for driving the scanning wiring 30 and improvement of rising / falling characteristics.
[0035]
In the driving method according to the above-described embodiment, two or more scanning wirings 30 may be simultaneously driven, and the number may be three or five. Further, the ratio of the drive voltage supplied to the selected scan line and the drive voltage supplied to the scan line adjacent thereto, that is, the light emission luminance of the pixel portion driven by the selected scan line, and the adjacent The ratio with the light emission luminance of the pixel portion driven by the scanning wiring is not limited to 50%: 25% shown in FIG. 7 or 50%: 50% shown in FIG. 8, and can be set freely. be able to.
[0036]
In the above description, the scanning wiring current is divided into a plurality of scanning wirings so as to alleviate the image deterioration due to the voltage drop in the scanning wirings as shown in FIG. In this case, the problem of the boundary line extending in the horizontal direction shown in FIG. A can be suppressed by simultaneously driving the pixel portions on a plurality of adjacent scanning lines, but the image is blurred in the vertical direction. It also has the effect of making the line difficult to see.
[0037]
On the other hand, this causes image blurring in a direction perpendicular to the scanning wiring as shown in FIG. FIG. 9A shows how the symbols E and ● appear when the three scanning wirings 30 are simultaneously driven at the 50%: 25% ratio shown in FIG. 7, and FIG. The symbols E and ● are shown when the scanning wiring is driven by driving.
[0038]
Therefore, in the driving method according to the present embodiment, image blurring is reduced by performing drive control according to the image pattern. That is, the influence of the voltage drop in the scanning wiring is likely to appear on a screen in which the white area changes suddenly in the white screen display. The following two conditions can be considered as the main condition for the voltage drop in the scanning wiring.
[0039]
1) The total amount of display signal voltage applied to the signal wiring when a certain scanning wiring is selected is large. Here, the total amount indicates the integrated amount of the voltage application time when the display signal is pulse width modulation, and indicates the integrated amount of the voltage when the display signal is pulse height modulation.
The current flowing into the scanning wiring increases and the voltage drop increases.
2) There is a large difference in the total amount of display signal voltage applied to the signal line when each scanning line is selected between adjacent scanning lines.
A difference occurs in the voltage drop between adjacent scanning lines, and a boundary line appears.
[0040]
Therefore, the display signal voltage total amount or the display signal voltage total amount difference is calculated in advance, and the brightness of the pixel portion driven by the selected scanning wiring and the scanning wiring adjacent thereto are driven according to the value. By changing the ratio with the brightness of the pixel portion, it is possible to suppress a voltage drop in the scanning wiring while reducing blurring of the image.
[0041]
The embodiment will be described in detail.
First, a scan drive system is prepared that differentially controls the values of the drive voltage applied to the scan line 30 selected by line sequential scanning and the drive voltage applied to the scan line adjacent thereto. Here, the differential means that the total light emission luminance of the pixel portion does not change even if the ratio between the drive voltage applied to the selected scan line 30 and the drive voltage applied to the scan line adjacent thereto is changed. Is meant to do.
[0042]
Subsequently, the total amount of the display signal voltage applied to the signal wiring when a certain scanning wiring is selected is counted. When the total amount is 100%, as shown in FIG. 7, the light emission luminance of the pixel portion driven by the selected scanning wiring N is 50%, and the driving light is driven by the adjacent scanning wirings N-1 and N + 1. The driving voltage of the scanning wiring is controlled so that the light emission luminance of each pixel portion is 25%.
[0043]
On the contrary, when the total amount of the display signal voltage is 0%, the light emission luminance of the pixel portion driven by the scanning wiring N selected according to the conventional line sequential scanning is 100%, and the adjacent scanning wirings N-1 and N + 1. The drive voltage of the scanning wiring is controlled so that the light emission brightness of the light emission brightness of the pixel portion driven by is set to 0%.
[0044]
When the total amount of the display signal voltage is between 0% and 100%, it is driven by the light emission luminance of the pixel portion driven by the scanning line N selected according to the ratio and the adjacent scanning lines N-1 and N + 1. The drive voltage of the scanning wiring is controlled so that the ratio with the light emission luminance of the pixel portion to be set becomes intermediate.
As for the details of the control method, the pixel unit driven by the adjacent scanning wiring may be caused to emit light for the first time when the total amount of the display signal voltage exceeds a predetermined value.
[0045]
By performing differential control as described above, a bright image that causes a voltage drop in the scanning wiring 30 is detected for each scanning wiring, and the total amount of the display signal voltage is smaller than a predetermined value, so there is no countermeasure against the voltage drop. In a necessary dark image, driving near the conventional line-sequential scanning can reduce the image blurring problem.
[0046]
Here, the drive voltage is applied simultaneously with the ratio between the light emission luminance of the pixel portion driven by the selected scanning wiring and the light emission luminance of the pixel portion driven by the adjacent scanning wiring, and the selected scanning wiring. The number of adjacent scanning lines and the curve and threshold value of the ratio change with respect to the total amount of the display signal voltage are optimally designed according to the design items and can be freely selected.
[0047]
In addition, when mainly displaying a moving image or the like, ratio control according to the brightness of the entire image may be performed in conjunction with an automatic luminance limiter (ABL) or the like. In moving image display or the like, since the display signal constantly fluctuates, the influence caused by the voltage drop as in the case of displaying a still image does not appear so significantly. In addition, the total amount of the average display voltage is as large as about 10%, and the voltage drop itself is often small. In such a case, even if the brightness of the display signal is not detected in units of one scanning wiring, even if the above ratio is changed so that the brightness is detected in the entire image and fed back to the next image, the large image deterioration is caused. It does not appear. In this case, the display signal counter for each scanning wiring described above is unnecessary, and the driving load of the driving circuit can be reduced.
[0048]
On the other hand, even if the ratio control according to the light emission luminance of the pixel portion for each scanning wiring as described above is performed, there is an image pattern in which image bleeding becomes a problem. For example, an image pattern in which a black character display B is performed on a white background A as shown in FIG. In this image pattern, since the screen is a bright white tone, the total amount of display signal voltage for each scanning wiring described above becomes large. Therefore, the light emission luminance of the pixel portion driven by the scanning wiring adjacent to the selected scanning wiring increases, and the resolution of fine characters deteriorates due to image blurring.
[0049]
In such a case, it is desirable to detect the above-described difference in the total amount of display signal voltage between adjacent scanning lines, and to increase the light emission ratio of the pixel portion driven by the adjacent scanning lines as the difference increases. That is, the total amount of display signal voltage applied to the signal wiring is counted not only for the selected scanning wiring but also for the upper and lower scanning wirings of this scanning wiring, and the total amount difference between these adjacent display signal voltages is maximized. In this case, the light emission ratio shown in FIG. 7 is used, and when there is no total amount difference, the light emission ratio of the line sequential driving as in the conventional case is used.
[0050]
As a result, the black character display B portion on the white background A in FIG. 10 has a small reduction in brightness due to black characters and almost no difference in the total amount of display signal voltage, so that a resolution close to that of the conventional line sequential scanning can be obtained. On the other hand, since the difference in the total amount of the display signal voltage becomes large at the boundary with the large black region C in the lower right, the boundary of the white part due to the voltage drop of the scanning wiring is caused by the action of the driving method shown in FIG. The line is relaxed.
[0051]
Of course, in the black character display B portion on the white background A, a gradation of light emission luminance is generated due to a voltage drop of the scanning wiring. However, since the gradation is not as sharp as the boundary line, it does not cause a big problem in terms of image. Further, although the image blur occurs at the boundary portion of the screen middle portion, the image blur is not so conspicuous usually because there are few images such as characters that require high resolution at such a boundary portion.
[0052]
Note that the ratio of the light emission luminance of the pixel portion driven by the selected scanning wiring and the light emission luminance of the pixel portion driven by the adjacent scanning wiring is determined by the light emission luminance of the pixel portion for each scanning wiring and the adjacent scanning. It is good also as a structure controlled by both the light emission luminance differences of the pixel part between wiring.
[0053]
The displayed image patterns vary, and the balance between the image blur reduction effect and the voltage drop effect reduction effect is finally determined by the user while viewing the image. Therefore, an adjustment function may be added to the flat display device so that the user can arbitrarily adjust the light emission luminance ratio, that is, the drive voltage ratio applied to the scanning wiring.
[0054]
In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, the present invention is not limited to the above-described SED, but can be applied to other flat display devices such as FED, PDP, and EL display device.
[0055]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide a driving method of a flat display device capable of reducing display unevenness due to wiring resistance and improving image quality.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a flat display device to which a driving method according to an embodiment of the present invention is applied.
FIG. 2 is a cross-sectional view of the flat display device taken along line AA in FIG.
FIG. 3 is a plan view showing a wiring structure and a pixel arrangement of the flat display device.
4 is an enlarged plan view showing a part of the wiring structure and pixels. FIG.
FIG. 5 is a plan view and a cross-sectional view showing an electron-emitting device of the flat display device.
FIG. 6 is a plan view for explaining a conventional line-sequential driving method of the flat display device.
FIG. 7 is a plan view for explaining a driving method of the flat display device according to the embodiment of the present invention.
FIG. 8 is a plan view for explaining a driving method of a flat display device according to another embodiment of the present invention.
9 is a diagram showing an image displayed by the conventional line-sequential driving method and an image displayed by the driving method shown in FIG.
FIG. 10 is a plan view showing an image pattern displaying black text on a white background.
FIG. 11 is a plan view showing an image pattern in which a black region is displayed on a part of a white background.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Back substrate 2 ... Front substrate 3 ... Side wall 4 ... Vacuum envelope 6 ... Phosphor screen 7 ... Metal back 8 ... Electron emission element 30 ... Scanning wiring 32 ... Scanning line drive circuit 40 ... Signal wiring 42 ... Signal line driving Circuit 50: Pixel portion

Claims (12)

A plurality of signal wirings and a plurality of scanning wirings arranged in a matrix; a pixel portion defined at each intersection of the signal wirings and the scanning wiring; and a pixel display element provided in each pixel portion. In a driving method of a flat display device that displays an image by driving the pixel unit with a driving voltage applied to the scanning wiring and a display signal voltage applied to the signal wiring,
Within one image frame period, a line driving is performed in which a driving voltage is sequentially supplied to each scanning wiring in a scanning driving period obtained by dividing the image frame period by the number of scanning wirings, and an image is displayed.
When a drive voltage is applied to at least one certain scan lines, in addition to the selected scanning line, while simultaneously applying a driving voltage to the other scanning lines more than one adjacent to the selected scanning lines, the A driving method comprising applying a driving voltage smaller than a driving voltage when driving only with a selected scanning wiring to the selected scanning wiring .   2. The method for driving a flat display device according to claim 1, wherein the image display element has a monotonously increasing characteristic in which light emission luminance increases with an increase in applied voltage.   2. The method of driving a flat display device according to claim 1, wherein the image display element is an element in which a current flows on the scanning wiring during driving.   4. The method for driving a flat display device according to claim 3, wherein the image display element includes a surface conduction electron-emitting device.   5. The drive voltage that is equal to or lower than the drive voltage applied to the selected scan line is applied to another scan line adjacent to the selected scan line. 6. Driving method for flat panel display.   The ratio between the light emission luminance of the pixel unit driven by the selected scanning wiring and the light emission luminance of the pixel unit driven by another scanning wiring adjacent to the selected scanning wiring is arbitrarily adjusted. The driving method of the flat display device according to claim 1, wherein A plurality of signal wirings and a plurality of scanning wirings arranged in a matrix; a pixel portion defined at each intersection of the signal wirings and the scanning wiring; and a pixel display element provided in each pixel portion. In a driving method of a flat display device that displays an image by driving the pixel unit with a driving voltage applied to the scanning wiring and a display signal voltage applied to the signal wiring,
Within one image frame period, a line driving is performed in which a driving voltage is sequentially supplied to each scanning wiring in a scanning driving period obtained by dividing the image frame period by the number of scanning wirings, and an image is displayed.
When applying a driving voltage to at least one scanning wiring, in addition to the selected scanning wiring, the driving voltage is simultaneously applied to one or more other scanning wirings adjacent to the selected scanning wiring;
The ratio between the light emission luminance of the pixel unit driven by the selected scanning wiring and the light emission luminance of the pixel unit driven by another scanning wiring adjacent to the selected scanning wiring is determined as the selected scanning wiring. As the total amount of display signal voltages applied to the plurality of signal wirings when selecting is increased, the light emission luminance ratio of the pixel portion driven by the scanning wiring adjacent to the selected scanning wiring is increased. A driving method of a flat display device, characterized by controlling a voltage. 8. The driving method of a flat display device according to claim 7 , wherein the total amount of the display signal voltage includes at least a total amount of time during which the display signal voltage is applied. 8. The method of driving a flat display device according to claim 7 , wherein the total amount of the display signal voltage includes at least the total amount of the display signal voltage. A plurality of signal wirings and a plurality of scanning wirings arranged in a matrix; a pixel portion defined at each intersection of the signal wirings and the scanning wiring; and a pixel display element provided in each pixel portion. In a driving method of a flat display device that displays an image by driving the pixel unit with a driving voltage applied to the scanning wiring and a display signal voltage applied to the signal wiring,
Within one image frame period, a line driving is performed in which a driving voltage is sequentially supplied to each scanning wiring in a scanning driving period obtained by dividing the image frame period by the number of scanning wirings, and an image is displayed.
When applying a driving voltage to at least one scanning wiring, in addition to the selected scanning wiring, the driving voltage is simultaneously applied to one or more other scanning wirings adjacent to the selected scanning wiring;
The ratio of the light emission luminance of the pixel unit driven by the selected scanning wiring and the light emission luminance of the pixel unit driven by the scanning wiring adjacent to the selected scanning wiring is selected for the selected scanning wiring. A difference between a total amount of display signal voltages applied to the plurality of signal wirings and a total amount of display signal voltages applied to the plurality of signal wirings when a scanning wiring adjacent to the selected scanning wiring is selected. A driving method of a flat display device, wherein the driving voltage is controlled so that the ratio of the light emission luminance of the pixel portion driven by the scanning wiring adjacent to the selected scanning wiring is increased as the value is larger. A plurality of signal wirings and a plurality of scanning wirings arranged in a matrix; a pixel portion defined at each intersection of the signal wirings and the scanning wiring; and a pixel display element provided in each pixel portion. In a driving method of a flat display device that displays an image by driving the pixel unit with a driving voltage applied to the scanning wiring and a display signal voltage applied to the signal wiring,
Within one image frame period, a line driving is performed in which a driving voltage is sequentially supplied to each scanning wiring in a scanning driving period obtained by dividing the image frame period by the number of scanning wirings, and an image is displayed.
When applying a driving voltage to at least one scanning wiring, in addition to the selected scanning wiring, the driving voltage is simultaneously applied to one or more other scanning wirings adjacent to the selected scanning wiring;
The ratio of the light emission luminance of the pixel portion driven by the selected scanning wiring and the light emission luminance of the pixel portion driven by the scanning wiring adjacent to the selected scanning wiring is the total amount of the display signal voltage of the entire image. A driving method of a flat display device, wherein the driving voltage is controlled so that the ratio of the light emission luminance of the pixel portion driven by the scanning wiring adjacent to the selected scanning wiring is increased as the value is larger. A plurality of signal wirings and a plurality of scanning wirings arranged in a matrix; a pixel portion defined at each intersection of the signal wirings and the scanning wiring; and a pixel display element provided in each pixel portion. In a driving method of a flat display device that displays an image by driving the pixel unit with a driving voltage applied to the scanning wiring and a display signal voltage applied to the signal wiring,
Within one image frame period, a line driving is performed in which a driving voltage is sequentially supplied to each scanning wiring in a scanning driving period obtained by dividing the image frame period by the number of scanning wirings, and an image is displayed.
When a driving voltage is applied to at least one scanning wiring, if the total amount of display signal voltages applied to the pixel portion driven by the selected scanning wiring exceeds a predetermined value, the selected scanning wiring In addition to the above, a driving method of a flat display device, wherein a driving voltage is divided and applied simultaneously to one or more other scanning wirings adjacent to the selected scanning wiring.

Images