JPS6290624A - Image display device - Google Patents

Abstract

PURPOSE:To obtain an image display device of high quality by using liquid crystal sandwiched between a substrate which has plural row electrodes and the opposite substrate which has plural column electrodes. CONSTITUTION:The liquid crystal is sandwiched between the substrate 1 which has plural row electrodes 3-6 and the opposite substrate 2 which has plural column electrodes 9 and 10. The display area of the column electrode group is divided into an upper and a lower half surface and separated like the electrodes 9 and 10, and they cross the row electrode group shown by the electrodes 3-6; and picture element electrodes 7 formed on the upper half surface of the substrate 1 drive the liquid crystal between electrodes 9 and picture element electrodes 8 on the lower half surface drive the liquid crystal between electrodes 10. Then, electrodes 3-6 of picture elements in one row are composed of couples of the 1st and the 2nd two electrodes 3 and 4, and 5 and 6 where diodes in the opposite directions are formed, and a cycle of picture element data stored between the electrodes 9 and 10, and 7 and 8 includes a display data period where data is inverted and an erasure data period following a display data period and an erasure data period, so that the liquid crystal is driven by diodes in picture element units.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image display device using a liquid crystal sandwiched between a substrate having a plurality of row electrodes and a counter substrate having a plurality of column electrodes.

[Prior Art] In conventional matrix-type image display devices, when trying to achieve a large display of 8 regions, the drive duty ratio decreases depending on the number of row electrodes, resulting in a decrease in contrast and a narrowing of the visual field. As a means to solve this problem, it has been considered to connect and drive the pixel electrode of each pixel individually with the row electrode via a diode.

[Problems to be solved by the invention] However, this device has only one diode between the row electrode and the pixel electrode.
There was a problem with AC driving of the liquid crystal because it was unidirectional. An object of the present invention is to provide a high-quality image display device that eliminates the above-mentioned drawbacks.

[Means for solving the problem] By arranging two diodes so that they are bidirectional between the pixel electrode and the row electrode of each pixel and devising the drive signal, a predetermined distance between the electrodes that drive the liquid crystal can be achieved. AC drive can be performed by applying an inverted potential periodically. The present invention is based on this idea, and in an image display device that performs display using a liquid crystal sandwiched between a substrate having a plurality of row electrodes and a counter substrate having a plurality of column electrodes, the row electrode in one row of pixels is The display data period is the cycle of pixel data stored between the one column electrode and the pixel electrode, which is composed of a pair of first and second electrodes with diodes in opposite directions formed between the electrodes. Following the erase data period, there is a display data period and an erase data period in which the data is inverted, and by driving the liquid crystal with a diode for each pixel, the duty ratio is increased and display performance is improved. .

FIG. 1 is a plan view of a liquid crystal display of an image display device of the present invention, in which (1) is a substrate having a plurality of row electrodes, (2) is a counter substrate having a plurality of column electrodes, and the substrate (1) is a counter substrate having a plurality of column electrodes. )(2)
A liquid crystal is sandwiched between them. The display area of the column electrode group is on top,
It is divided into two parts on the lower half (9); It is formed separately as shown in (10), (3) (4), (5) (8)
The pixel electrode (7) on the top surface formed on (1) is between (9) and the pixel electrode (8) on the lower half surface is perpendicular to the row electrode group shown in (1). The liquid crystal is driven between the two. The row electrode in a row of pixels including (7) on the upper half is formed by the pair of two electrodes (3) and (4), and the row electrode in a row of pixels including (8) in the lower half is similarly formed by two electrodes (3) and (4). Electrode (5
)CF3). The wide column electrodes formed in the plane that overlaps (1) in (2) are transparent electrodes, and are connected from the edge of the substrate to the wide electrodes (2).
The column electrodes running on one half of the substrate are metal electrodes or electrodes in which a metal electrode and a transparent electrode are laminated.

Similar to FIG. 1, FIG. 2 is a plan view of the liquid crystal display of the image display device of the present invention, (11) and (12).

(13), (14), (15), (1B), (
17), (18) is (1).

(2), (3), (4), (5), (8),
Corresponding to (7) and (8), substrates (11) and (12)
A liquid crystal is sandwiched between them.

The column electrode group on the counter substrate (12) is formed separately as shown in (21); (, 22) so that the display area is divided into upper and lower halves, and (13), (14); (15
) The row electrode group shown in (1B) is perpendicular to the pixel electrode (17) on the upper half formed on (11), which is wider than the pixel electrode (21) on the upper half formed on (12). between column electrodes,
The pixel electrode (1st) on the lower half drives the liquid crystal between it and the wide column electrode (22). A substrate (11) having a plurality of row electrodes has a plurality of column electrodes that are separated into upper and lower display areas and form a capacitance with a pixel electrode, and one column electrode (19) is a column electrode including (17). Each pixel ′i on the L′h plane of
[The column electrode (20) forms a volume μ with each pixel electrode on the top surface of a row including (18). A substrate with multiple row electrodes (!l) has column electrodes on a counter substrate (!l).
12)1. (18) is connected to (21) and (2Q
) is connected to (22) outside the board, or approximately the same potential is applied at approximately the same timing. This is, for example, one of the periods in which one row of pixels is selected, as will be explained later.
Equivalent timing within a period of /10, 100m
The potentials are equivalent within the range of V.

FIG. 3 is a configuration diagram of a pixel of the image display device of the present invention driven by a diode formed for each pixel, and shows (I, J) to (tit,
4 pixels of J, 1) are shown.

(23) and (24) are diodes with opposite directions, (2
5) is the pixel data storage capacity R, (2B) is the pixel electrode,
(27) is the column electrode of the substrate E facing (2B), (28
) is a liquid product, (29) is a column electrode that forms a storage capacitor with each pixel electrode, and (30) and (31) are a pair with diodes in opposite directions formed between them and (26). There are two row electrodes, and D(J) and 0(J, 1) are the signals of the column electrodes of the 1st column and the (J+1) column on the upper half of the counter substrate (12).

d(J), d(J+1) are D(J), D(J, 1) of the column electrodes in one row and (J+1) row on the upper half substrate (11).
), dU), d(j+1) is the signal of the column electrodes of column j and column (j+1) on the lower half substrate (11), R(I); R'(+) and R( I÷1), R'(
I-1) is the signal of the first and second two row electrodes forming a pair of row 1 and row (I÷1) of h on the substrate (11). (I,
J) = (1, l), then (30) and (31) become (
13), (14), (28) to (19), (27)
) corresponds to (21), and (26) corresponds to (17). The image display device is (23) (24) (25) (2B) (2
9) A substrate in which a plurality of (30) and (31) are arranged in a matrix so that row electrode groups and column electrode groups are orthogonal to each other, and (2
A liquid crystal (28) is placed between the substrate having a plurality of column electrodes arranged in 7).
is injected to form a display body. Selection period of one row of pixels,
The potential applied to one or both of the two row electrodes in a pair is guided to the pixel electrode (2B) through a diode, and the voltage difference between the data applied to the column electrodes (27) and (29) is set to (2B).
5) and (28) as pixel data in parallel capacitance? Heh, during the non-selection period, 30) and (31) for (26) are changed to (
23) and (24) are set as potentials that are biased in the opposite direction, and the voltage stored during the selection period is held to display an image. The capacity for storing this pixel data, which consists of the liquid crystal in the liquid crystal display shown in Figure 1 and the liquid crystal and storage capacity in the liquid crystal display shown in Figure 2, is (2
3) It is configured so that the voltage is sufficiently larger than the 8 volts between the row electrode of the diode and the pixel electrode in (24), and it hardly depends on the potential changes in (27) and (29) during the non-selection period of the pixel (2B) (
27) Determine the display voltage between.

FIG. 4 shows a cross-sectional view of a pixel of the image display device of the present invention, and FIG. 5 shows a plan view of the pixel of the image display device of the present invention. FIG. 4 is a cross-sectional view taken along the line A-A' in FIG. 5, viewed from the direction of the arrow. (33), (51).

(52) is one electrode of the diode connected to the N-type semiconductor layer, (34); (53) is a column electrode and forms an 8-layer with the pixel electrode; (35), (3B), ( 37)
The diodes (54) and (55) are constructed by forming three layers in succession, each having one conductor layer of N type, ■ type, and P type. (3
8) is an insulating film and a storage capacitor dielectric, (39); (5B
), (57).

(4o); (58), (59) are diode (5
4), P-type semiconductor layer of (55), electrode (33);
(51), (52), (41)
); (EiO), (63) is connected to the P-type semiconductor layer at the other 'I pole of the diode, and (42).

The electrodes of (82) and (81) are (33); (51)
, (52). (43) , (
f(4) is the pixel electrode, which includes diodes (54) and (55
) is connected to the electrodes connected to the N-type semiconductor layer and the P-type semiconductor layer, and (44) is an alignment treatment layer, which is formed on the substrate of (32).

(48) is R (red) formed on the counter substrate (45);
G (green) and B (W) are layers corresponding to the pixel electrodes (43) of the three primary color filters, (47) and (48) are column electrodes, and (49) is an alignment treatment layer. A liquid crystal (50) is sealed between the substrates (32) and (45). One electrode of the diode and the column electrode (34) are placed on the glass substrate (32).
) ; After forming (53) with metals such as Ni, Or, Mo, Ta, etc., PH3, B7 added to 5iHa gas
By changing the dopant gas such as H6, N-type, ■
(35), (3B)
, (37), and the insulating film (38) is etched in the shape of 5i02°5iaN4. SiOxNy 5t'. Electrodes (81), (82) connected to one electrode of the diode after opening the contact [], and the other electrode (eo) of the diode.

(63) is formed of metal such as AI, old, etc., In, + 0
A pixel electrode such as 3 or 5n02 is applied to form the shape (84), an overcoat film of polyimide or the like is applied, and an alignment treatment layer is formed by a rubbing method. After printing one layer of color filter on the opposite glass substrate (45), AI, old.

((47) with metals such as Er, No, Ta, In2
Wide transparent column electrodes (48) overlapping the pixel electrodes are formed using O3, 5n02, etc., and an overcoat film such as polyimide is applied, and an alignment treatment layer is formed by a rubbing method. ]
The transparent electrodes such as In2O3 and 3n02 in Section 2 are obtained by forming a resist layer left on a substrate with metal electrodes (41), (42), or (47) in a shape opposite to that of the transparent electrode to be formed. After attaching the transparent electrode to the metal electrode, it is patterned using a lift-off method that involves removing the resist, or after attaching a transparent electrode to the metal electrode.

It is etched into a shape that covers the metal electrode.

(60) and (61) are the first and second two electrodes that form a pair of diodes (54) and (55) opposite to each other between the pixel electrode and the arrangement. (51
), (eo) and between (52), (83), the storage capacity between (53) and (84) and the parallel storage of the liquid crystal are sufficiently large, and the N of the diode is A metal electrode (51) connected to the type and P-type semiconductor layers
), (52), (80), and (83) also serve as light shielding films.

[Operation] FIG. 6 is a timing chart showing the operation of the image display device of the present invention. D(J) is an image signal of a column electrode that drives one column of liquid crystals on the upper half.

d(J) is a signal equivalent to D(J) of the column electrode that forms a storage capacitance with each pixel electrode in one column on the upper half,
R(1); R'(1), R(M); R'
(M) is the signal of two row electrodes, first and second, forming a pair of 1st row and 1M rows on the half surface. (](j), d(j
) is the quantum image data signal of the column electrodes that drive the five columns of liquid crystals on the lower half, and the column electrodes that form the storage capacity, and R
(M-1); R'(M+1), R(M+L);
R′(M+L) is the first pair of row 1 and row L on the r″h plane; the second two rows ゛I D(J), d(J
) and D(j), d(display data period (Wl; W2) of the potential of v-O as shown in D, != near V(
Following the erased data period (El; E2) of ≦V), O~■
The display data period (-1';l112') and the vicinity of O (≧
O) has an erased data period (E1';E2') and
';W7' period data is display data that is inverted from Wl; L period data with V/2 (7) potential as a reference, and El';E2' period data is based on V/2 potential. As El; erased data that is inverted from the data of the period E2.

WIEi+ 'El' is one cycle of image data of one side of the display area divided into two, and w2E
2w2'E2' is one cycle of image data of the other half. R(1); R'(1) to R(M)
; R'(M), R(M41); R'(If-1)
~R(M◆L), R'(I<+[,) The signal that sequentially selects the pixel group for each row, that is, the signal that is guided to each pixel electrode through the group of guiots for each row, is divided into two. It is added to the display area on one half of the displayed display area and then to the display area on the other half. W+E+ ;W2E
2 period is R(I), R'(1) CI= 1- M
+L) The potential during the selection period is ■, and Wl'El';W
During the period 2'E2', the potential in the selection period of R(I) and R'(1) is 0, so the cycle of pixel data stored between the column electrode and pixel electrode of each display area is also 1.
Similar to the image data applied to the column electrodes, a display data period and an erase data period are followed by a display data period and an erase data period in which the data is inverted. one half
・Pixel data D between the column electrode and pixel electrode of the pixel in row J column of Table 1 (
J)-D(1, J) is the display data period,
It consists of an erase data period el, a display data period w1' in which data is inverted, and an erase data period e+', and pixel data D(j)-El(M+1.0(7
) This is shown by the fact that one cycle is composed of w2 e2 w2 ' a2 '. Wl, El
', W? ,E? During the period ', the diode shown in (23) of the pixel in FIG. 3 is forward biased for the selection period, and El, W+'
;E7. During the period W2', the diode shown in (24) is forward biased during the selection period and leads the row signal to the pixel electrode, so W+Ei+'E+';E2W2'E2'
The sixth pixel group sequentially outputs a signal to select the pixel group for the entire period of
In the figure, R(I), R'(I) and R(I) are Wl, El
'; W2. A signal is output to select a pixel group during the period E2', and R' (1) is El, W+'; E2. W? '
It is also possible to output a signal to select the pixel group for the period W1E+;W2E2(7) period (7)R(1) in FIG.
, R'(I) No signal VyL*Selection period V, image data row (J), D(j) is V-O, so the potential of the pixel electrode is between 2v and 0, and the non-selection period R(1 )wo-a
, R'(1) to 2V + 7!3 (7) Reverse bias the pair of diodes in the potential pixel and set W1'E
Since the signals R(I) and R'(I) during the period 1'E2' are 0 during the selection period and the image data El(J) and o(j) are θ~V, the potential of the pixel electrode is is in -・v-■.

Non-selection period R(I)t--V-y, R'(I) as V
The diode pair is reverse biased at a potential of +δ,
If α = γ, β = δ (≧O), then residue IE1; W2 E
2 and W+'E+'; In W2'E2', R(1) and R'(1) during the selection period and the non-selection period change by a constant amount -■, and the reverse bias between the terminals of the diode is maintained throughout the period. It can be kept within about 2V. every meter of this line
JT (7) - Changes in constant I V are El, E+'
: E2. During the period El', the pixel group in the last row of each display area is selected and erased data is input into the pixels.

Potential D(J) of pixel data between the column electrode and the pixel electrode of the pixel in row 1 and column J on one half, and the pixel in row 1 and column j on the other half
-D(1,J), D(j)-D(M+1.j) is 2 frames in each display area, and from the entire display area of the liquid crystal display, R(1); ni+L)
; Sequentially outputs a signal to select a pixel group for each row of R'(ML-L), inverted at the same period as the row drive period of the l frame indicated by F, and the liquid crystal is an AC waveform with a duty of 50%. being driven. ■, α (=l, F is, for example, 5V
, 0.5V, and 1/80 seconds, and the number of pixels in each display area is chosen to be equal, M=L. Also, the row signals t+E+ ; W2E2 and W1'E1';W2'E
The change v between 2' is R(I) in the power supply voltage range of V~-■-γ, O~2v+β for each shift register of the signal system that outputs the row Q.

In addition to configuring the R' (I) signal to be output as shown in Figure 6, the power supply voltage of each shift register is kept constant at ■+α and ■+β throughout almost the entire period, with α = γ, β; δ. Keep, W, El; enemy2E2 and hat 'E1';W2'E2'
It is created by changing the positive and negative power supply potentials of each shift register that outputs R(I) and R'(I) by V.

[Embodiment] FIG. 7 is a top view of a liquid crystal display of an embodiment of the image display device of the present invention. (85), (8s), (87).

(88), (89) are (1), (2) in Figure 1,
(3), (4).

Corresponding to (7),! ! A liquid crystal is sandwiched between the i-plates (135) and (13G). The column electrode group formed on the counter substrate (6G) and the column electrode group forming the storage capacitance of the substrate (85) run perpendicularly to the row electrode group on (65) over the entire display area. (89) - The column electrode (71) that drives the liquid crystal between each pixel electrode in the column is connected to the counter substrate (
6G) f: formed on the column electrode (7) on the substrate (65).
0) forms a capacitance with each pixel electrode in a row including (69), and a signal equivalent to (71) is applied to (70).

FIG. 8 is a sectional view of a pixel in an embodiment of the image display device of the present invention, and FIG. 9 is a top view of a pixel in the embodiment of the image display device of the present invention. FIG. 8 is a cross-sectional view taken along line B-B' in FIG. 9, viewed from the direction of the arrow. (73) and (92) are transparent electrodes in contact with the column electrode (75); (95) and form a capacitance with the pixel electrode (80);
4) ; (93) and (34) are one electrode of the diode connected to the N-type semiconductor layer, (7B) and (77).

(78) constitutes diodes (9B) and (97) with N-type, ■-type, and P-type semiconductor layers that are successively formed.

The transparent pixel electrode has an insulating film (79
) formed on (81) and opening to (79); (9
9), (100), (82); (lot),
(102), each with a diode (
96) P-type conductor layer (78) and electrode (83); (
103), P-type conductor layer and electrode (toe) of diode (87), electrode (74), (93) and electrode (8
4), (105), electrode (94) and electrode (104)
), (74); (93)-(84)
(105).

(1oe) is the N-type semiconductor layer of the diode (96), (
P-type semiconductor layer of (97) and pixel electrode (80), (98)
) are connected. (103) and (104) are diodes (9El) in opposite directions between the pixel electrodes,
The first and second electrodes form a pair of (9?). (85) is an alignment treatment layer, and each layer in L is formed on the substrate (72). (87) is a layer corresponding to the pixel electrode (80) of the R, G, BE primary color filter formed on the counter substrate (8B) f, (88) is a transparent column electrode in contact with the column electrode (89), ( 90) is an alignment treatment layer. The liquid crystal (91) is the substrate (72), (8B)
injected in between. In20 on glass substrate (72) h
After forming a transparent electrode such as 3 or 5 nOz in the shape of (92), one electrode and the column electrode connected to the N-type semiconductor layer of the diode are made of metal such as Ni, Or, No, Ta, etc.
(93), ' (94) and (95). After successively depositing the N-type, ■-type, and P-type conductor layers of the diode, (9B).

Etch as shown in (97), and attach the pixel electrode using In703.5n07''9 following insulation 1)2 (79).
98) (7) Shape. After opening the contact drawer at (79), connect the electrode (10) connected to one electrode of the diode.
4).

(105) and the other electrode (103) and (10B) connected to the P-type semiconductor layer of the diode are formed of metal such as AI or old metal, an overcoat film of polyimide or the like is applied, and an alignment treatment layer is applied by a rubbing method. Form. After a single layer of color filter is placed on the opposing glass substrate (86), In
A wide transparent column electrode (88) overlapping the pixel electrode is formed using 2O3, 5n02, etc., and (89) is formed using AI, Ni, O.
A metal such as R, No, Ta, etc. is formed on (88), and an overcoat film of polyimide or the like is applied thereon, and an alignment treatment layer is formed by a rubbing method. Similar to the configuration shown in FIG.
The metal electrode connected to the type semiconductor layer also serves as a light shielding film.

Figure 1θ is a timing chart showing the operation of the embodiment of the image display device of the present invention. D(J) of the column electrode that forms a storage capacitance with each pixel electrode
is a signal equivalent to R(1); R'(1),
R(M); R'(M), R(t1); R'
(M, 1), R (M, L); R' (M, L) is the first pair of rows 1, 1M, (M-1), and (ML); The cycle of image data applied to the 0 column electrode group, which is the signal of the row electrode of the book, is D(J), d(J
), the display data period W of the potential from O to -■,
! : Following an erased data period E near O, there is a display data period W' from 0 to ■ and an erased data period E' near O;
The data in the period 'E' is inverted from the data in the period WE with O as the reference.If M=L, the signal that sequentially selects a pixel group for each 0th row is R(1); R'(1). , R(
M, 1); R'(M + l), ......, R(
K); R'(K), R(M-K); R'01
．． K), ..., R (M), R' (M), R
(2M); R' (2M) is output in the order of 0 selection period, and the pixel groups in half of rows 1 to M and half of rows (T1) to (2M) are selected alternately. 1), R'(
I) Since the potential of (I = l - M+ L) is O, the cycle of pixel data stored between the column electrode and the pixel electrode also coincides with the display data period, similar to the image data applied to the column electrode. Following the erased data period, there is a display data period in which data is inverted and an erased data period, and the pixel data D between the column electrode and the pixel electrode of the pixel in the 1st row and J column is
One cycle of (J)-D(1, J) is the display data period w
1. Erase data period e1. Consisting of a display data period w1' in which data is inverted and an erase data period el', pixel data D(J)-D(M-1, J
) is composed of w2e2w2'e2' and has an AC waveform with a duty of 50%. W, E'
During the period, the diode shown in (23) of the pixel in FIG. 3 is forward biased for the selection period, and during the periods E and W', the diode shown in (24) is forward biased for the selection period to guide the row signal to the pixel electrode. , R(I) outputs a signal to select a pixel group for a period of -, E', and R'(1) outputs a signal for selecting a pixel group for a period of -, E'.

It is also possible to output a signal for selecting the pixel group during the period w'. In FIG. 1O, as already explained, R(I).

The signal R'(1) is in the selection period O, and the image data D(J) in the period 1llE is 0 to -V, so the potential of the pixel electrode is -v-■, and the voltage of lli'E' is Since the period D(J) is from 0 to V, the potential of the pixel electrode is similarly from -v to V. Therefore, R(1) during the non-selection period is -V
-a, R' (1) The pair of diodes at a potential of V+β is reverse biased, and α=β (≧O) is set.

By the way, the pixel shown in FIG. 9 has diode pairs on the left and right sides so as to be symmetrical with respect to the column electrode (95), and the N-type and P-type semiconductor layers of the left and right diode pairs are connected to the pixel electrode. If configured, the diode pair will be doubled, (95
) are arranged in each pixel of each column so that the leads on the edge of the substrate (65) in Fig. 7 are also unique two column electrodes, and the two column electrodes are arranged symmetrically on the left and right. If the same signal is applied to each two column electrodes, the diode pair and storage capacitor column electrode will be doubled, and the pair of substrates (65) will be doubled. If the leads of the two row electrode groups are arranged on the left and right edges of the substrate, the row electrode leads will be doubled.

If the pixel is configured in an L-shaped manner, short-circuit defects between row electrodes and column electrodes can be corrected by dividing the column electrode or row electrode at the defective location using a device such as a laser. A defect in a diode breaks the row electrode to that diode or the electrode connecting the diode and the pixel electrode,
A good substrate can be created by guiding the potential of the row electrode to the pixel electrode from the other diode pair.

[Effects of the Invention] As described above, the image display device of the present invention solves the problem of the matrix type by inserting a pair of diodes in each pixel.
This problem is solved by changing the pixel configuration and driving signals, and since the liquid crystal is driven at high duty, a high-quality display can be obtained. Furthermore, the reverse bias voltage of the diode of each pixel is up to about twice the maximum amplitude of the image data, which is advantageous in manufacturing, and the power supply voltage of the shift register that outputs the row signal can be set to about the maximum amplitude of the image data. Since the drive circuit for the display body can be driven at a low voltage, the present invention is suitable for application to display bags in various fields.

[Brief explanation of drawings]

1 and 2 are plan views of the liquid crystal display of the image display device of the present invention. FIG. 3 is a block diagram of a pixel of the image display device of the present invention. FIG. 4 is a cross-sectional view of a pixel of the image display device of the present invention. FIG. 5 is a plan view of a pixel of the image display device of the present invention. FIG. 6 is a timing chart showing the operation of the image display device of the present invention. FIG. 7 is a plan view of a liquid crystal display of an embodiment of the image display bag δ of the present invention. FIG. 8 is a sectional view of a pixel in an embodiment of the image display device of the present invention. FIG. 9 is a plan view of a pixel in an embodiment of the image display device of the present invention. FIG. 10 is a timing chart showing the operation of this embodiment of the image display bag of the present invention. Substrate = 1.11 Counter substrate: 2.12 Row electrodes: 3, 4, 5, 6.13.14.15 Pixel electrodes: 7, 8.17.18 Column electrodes = 9, 10.19.20.21. 22D
(Ding) D(
Atl) Figure 3 Figure 4

Claims (3)

[Claims] (1) In an image display device that performs display using liquid crystal sandwiched between a substrate having a plurality of row electrodes and a counter substrate having a plurality of column electrodes, the row electrode of one row of pixels is located between the pixel electrode and The cycle of pixel data stored between the column electrode and the pixel electrode consists of a pair of first and second electrodes in which diodes in opposite directions are formed, and a display data period and an erase data period. An image display device further comprising a display data period and an erase data period in which data is inverted. (2) Column electrode groups are formed separately so that the display area is divided into two, and the cycles of pixel data stored between the column electrodes and pixel electrodes of each display area are the display data period and the erase data period. Subsequently, the display data period has a display data period in which data is inverted and an erase data period, and a signal for sequentially selecting a group of pixels for each row is applied to one display area and then to the other display area. The image display device described. (3) A substrate having a plurality of row electrodes has a plurality of column electrodes individually connected to column electrodes of an opposing substrate, and a capacitance is formed between the pixel electrode and the column electrode. The image display device according to item 1 or 2.