JPS6150114A - Imaging device - Google Patents

Abstract

PURPOSE:To attain a high density and a high resolving power by arranging plural microshutters in one signal electrode obliquely crosswise in the moving direction of a photosensitive body to set the pitch between shutters to a minimum length. CONSTITUTION:A signal electrode 500 formed on the second glass is a transparent electrode except a part 501 which consists of a metallic film and is indicated by oblique lines, and common signal electrodes 504 and 505 formed on the first glass are divided by a center line 507, and parts indicated by oblique lines are metallic electrodes, and 2,000 microshutters consisting of transparent electrodes are arranged zigzag at a pitch P2. Center lines 503 and 507 are matched to put on the second glass on the first glass, and parts indicated oblique lines intercept the light, and the transmitted light of shutters 511 is modulated. The parts 501 of electrodes 500 are masked with a metal to hold down light leak parts 512 to a minimum, and sides of electrodes 500 intersect the center line 503 at right angles to make intervals of electrodes 500 maximum for light leak parts 512 in a certain area, and electrodes 500 are formed as transparent electrodes except said parts 501 to extend the error margin for combination with the first glass.

Description

[Detailed description of the invention] [Technique - bone division] This ninth paragraph relates to the printing device d.

[Kenki Technology]

The configuration of the unit including the liquid crystal light pulp is shown in FIG.
The liquid crystal light pulp consists of a substrate 114 on which a liquid crystal panel 112 and a liquid crystal drive circuit 115t are mounted. The light emitted from the light source is modulated by the liquid crystal light pulp. This optical signal 116 is imaged onto the photosensitive drum 102 by an imaging lens 115. An erect image can be obtained by using a focusing optical fiber array as the imaging lens. Figures 2 and 5 show the configuration of the MJ4 panel. The liquid crystal panel has 125 ft of liquid crystal composition sealed between a glass substrate 117 having common signal electrodes 119 and 120, a glass substrate 118 having signal electrodes 121 and 122, and a spacer 126, and polarizing plates 125 on both sides of the glass substrate. and 124.

The common signal polarization consists of a transparent electrode 119 and an optically opaque metal electrode 120, with the signal sides 121 and 122 being transparent electrodes. The polarizing plates 125 and 124 are arranged (a) so that their polarization planes are orthogonal to each other.

The light is modulated by the transparent portion 119 of the common electrode and the micro-shutter portion formed by the single word electrode.

As a liquid crystal composition, optically active substance 4-(2-meth71b
) -A' -cyanobiphenyl
By using a long-period cholesteric liquid crystal sound obtained by adding e 1 (5% by weight), a high-speed t-substitute light pulp can be produced (a). The frequency a of this liquid crystal attraction orientation is
The characteristics are shown in Figure A. The frequency at which the dimagnetic anisotropy is zero is called the crossing frequency and is expressed by fc. Let fI be a frequency lower than fc, and fH be a frequency higher than fc.

The liquid crystal light pulp operates by applying signals of fL and f)10 frequencies to each signal electrode. Fifth
Figure (b) shows the response of the applied signal and (a) the light transmitted through the liquid crystal light pulp. The signal at time fH indicated by T2, Tb
A signal of time fL is applied.

T1 is called the full licking period, T2 is called the opening time of 15, and Tb is called the non-opening time. The liquid crystal light pulp opens by applying the fH signal, and closes by the fL signal. By the north method described above, Il! We were able to obtain high-speed liquid crystal light pulp in a timely manner. However, in order to print a high quality seal,
It is necessary to arrange microshutters at a high density of about 10 per frame, and the width is 20Cr to print on an AA plate.
The number of microshutters that must be lined up is 20,001. For this reason, in the north method mentioned above,
The number of signal 'electrodes was 2,000, and the number of drive circuits and their mounting terminals were also 2,000 and 2,000, which had the disadvantage of lowering manufacturing yields and increasing costs.

However, by using the time-division dynamic m-motion method, the number of signal electrodes could be reduced by half.

First, the configuration of one ton is shown in Fig. 6. 401 and 402 are common signal electrodes, 405 to 405 are signal electrodes, 410
, 412 is a Micro 7 player. Next, various signal waveforms are shown in FIG. The common electrode signal 420 has a repetition period of Tf, and Ta and Tb each have a half period. In strong time division, the common electrode signal 420 is the first half 421 of one period.
The latter half is selected respectively. The signal waveform of 420 is named C1, and the signal waveform of 421 is named 02. The selection signal is the crossing frequency a
It consists of a high frequency fH with a higher frequency than fc and a low frequency fL with a lower frequency than fc, and each time is T
h and Tc. When not selected, only low frequency (efth) is used.

On the other hand, the signal waveform applied to the signal electrode side is a signal to open the microshutter (FON, a signal to close the microshutter (FON), and a signal to close the microshutter (FON).
ff) is 425. The open signal FON, which has a half period (Ta or Tb) of the common electrode signal C1 or C2 for both FON and Foff, has a high frequency part that is the same (Th,) as the 17j frequency part of C1 (or 02) and has an opposite phase. It is formed by the low frequency of CI (or C2) and the bottom circumference of the opposite phase. The closing signal Foffi has only one low frequency wave having an opposite phase to the low frequency fL of 01 (or 02).

Common electrode signal C1402 on common ton ↑ version 401 of gold wheel 6 figure
When FON or FOFF is applied according to the signal intensity data, the 81st pressure waveform is applied to the micro shutter 410. c) Shown in (a). Also corresponds to the applied waveform shown in Fig. 8 -1-A micro shiner
The light excitation characteristics are shown in Figure 9 (al(b), (c), and d). ・□ [tJQtdl in the valley graph in Figure 39 is time, and handle.

The vertical axis is the light transmittance '11 when two polarizing plates are stacked in parallel.
This is the transmittance of the micro shutter when it is set to 00%. The result in Figure 9 is fh = 150KHzf L = 5
KBZ, stamping voltage ±50V, Tf=, 5mz, T
a = 1 msl! c, T h = 0.7 m5
A friend obtained under EC conditions.

The transmission characteristics of A5Q, 451.4'i2, and 455 correspond to the signal voltages of 42 A, 425, 426, and 427, respectively.

Here, in the electrode structure shown in FIG. 6, the pitch between the microshutters and the pitch between the signal squares are unclear, so there is a problem that high density and 1% resolution cannot be obtained.

〔the purpose〕

The present invention overcomes the above problems and provides one signal 1! The Micro 7 Yatsuta, which has the inner ring number, is intended for a table that provides a printing device that can obtain high density and high resolution by arranging them diagonally and laterally with respect to the moving direction of the photoreceptor.

[Example] Fig. 10 (a), (b), Ic) is the signal of this example, and the common electrode and its combination are all 1-. (a'l is the signal ball I1j5 formed on the second glass.
00 is a transparent quadrupole except for the 1 and 1Q parts, and the shaded part soi
It shines with gold 4' familiar: jr-fru. “d1 愼・L;
Akiko (Jin Interp/F) Extends vertically in the drawing, and the pitch P1 between K<4 on one side is 400 μm, and the pitch (
There are 500 J4jl. This improves reliability in high-density mounting of H41 terminals. Between adjacent electrodes near the center line 505! Right 502 i'j 10μm
It is. (b) is the common signal formed in the first glass
IM, it's extreme. Common signal line 5 for center line 507
04 and 505 are divided, and the interval 508 is 10
It is μ island. The shaded area is '44'% metal, and the micro-shutter 506 part is made of f4 to the transparent I slope 1. Micro 7 Yatsuter is staggered p, ==LO(Tμg
Pitch 2000 pieces (piece IRII 200 a rn pitch - r 10001! month) Two pieces of glass lined up in rows are stacked so that the centers θ503 and 507 match, and again 7
53(c) 1. The shaded area emits light, and the null light transmitted through the micro-brighter 511 is modulated. Therefore, leakage of light from parts other than the micro-noyano J- becomes backklarand noise, which is undesirable, but leakage from the interval 508 between the two common signals is geometrically unavoidable. In this embodiment, a metal mask is shaved on a part 501 of the signal area (a) and the entire part 512 of the signal area (a) is minimized to the extent that it does not cause any practical problems.

Furthermore, since the side of the signal electrode intersects the center line at right angles, the signal 'l!
The distance between poles can be maximized, which is advantageous in panel production.

Next, by making the signal electrode 500 entirely transparent except for the oblique part 501, the error margin when combined with the first glass can be increased both in the vertical direction, and the yield is improved.

The interval j between the two rows of micro 7-layer arrays arranged in a staggered pattern (Figure (b)) is determined by
Since the written dots do not shift by half a pitch, they are limited by the writing speed, the moving speed of the photoreceptor, and the pitch of the written dots in the direction of movement of the photoreceptor. This time 10
Since it was written with a 0 μm pinch, e = 250 am. To do this, it is only necessary to delay the data of the Micro 7 player on one side by two lines, while increasing the margin when creating the panel.

Next, the entire profile of the signal '114 is shown in Figure 11. I have included the dimensions of the panel I made this time (units are IFJ), but if something with this shape is constructed only from transparent electrodes, the impedance of the terminals will be too large to ignore. Therefore, it is shown in the explanation (1)
A gold-ALA film was formed on the current part to lower the impedance of the wire.

[Young fruit]

In the above-mentioned tapping invention, since the plurality of micro-shins in one signal electrode are arranged diagonally horizontally with respect to the direction of movement of the photoreceptor, a common tj, t of four rows is used. ,
Even though it is a substitute light pulp having a density of 3, the pitch between the micro lusters can be set to the minimum distance, so it has the effect of obtaining high resolution.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an optical write signal generating section. FIGS. 2 and 5 are diagrams showing the structure of a liquid crystal panel. FIG. 4 is a diagram showing the frequency characteristics of dielectric anisotropy of the liquid crystal material used in the present invention. Figure 5 (a). (b) is a diagram showing the response characteristics of the liquid crystal material used in the present invention and the driving signal at that time. FIG. 6 is a diagram showing the entire structure of the electrodes used in the present invention. FIG. 7 is a liquid crystal drive waveform diagram according to the invention, and is 420.
421 are common electrode signal waveforms, and 422.425 are open and closed signal waveforms, respectively. 418 (a) to 418 (a) are diagrams of mixed pressure waveforms actually applied to the liquid crystal, and by combining the common electrode waveform and the signal [polar liquid type], the waveform becomes 4 as shown in the figure. FIGS. 9(a) to 9(d) are graphs showing all the light transmission characteristics of the micro-shutter when the four types of signals shown in FIG. 8 are applied. 424 becomes 450, A25 becomes 4ro1
426 corresponds to 452, and 427 corresponds to 455. 1st Ql・Il (a) to (C) are diagrams representing the shape 'f' of precept 1'q of all constituent parts of Micron Yatsuter, (a) is a signal sleeper, (b) is a common signal Type 1.慝、(
C) is a combination of the above two. - North map 11 is a schematic diagram of the entire 1J IAH. that's all

Claims (1)

[Claims] A liquid crystal light in which a liquid crystal is sealed in a pair of transparent substrates, a plurality of common electrodes are arranged on one of the substrates, and a plurality of signal electrodes are arranged on the other side to cross the common electrodes, thereby forming a plurality of microshutters. In a printing device having a photoconductor that moves in a direction perpendicular to the longitudinal direction of the pulp and a common electrode, a plurality of micro shutters in one signal electrode move in a direction obliquely transverse to the direction of movement of the photoconductor. A printing device characterized by being arranged with each other.