KR950010441B1 - Image control method in cvp - Google Patents

Abstract

dividing data on the same horizontal line of a source into odd and even positioned data through a plurality of first and second horizontal line filters to expose the data; if the exposure of the data on odd-th position of a first line for the first horizontal line filter is completed, moving upward a liquid crystal display by one horizontal line; exposing new data on odd-th position at the first horizontal line filter; after exposing data on an even-th position of a first line to the second horizontal line filter, moving upward the liquid crystal display by one horizontal line; and repeating the above operation.

Description

How to control liquid crystal imaging of video printer

1 (a) to 1 (c) is a diagram illustrating the printing of a general laser printer to which the multirow method is applied.

FIG. 2 (a) is a block diagram of a FOLCD panel of a general laser printer, and FIG. 2 (b) is a color filter structure diagram.

3 is a schematic diagram of a color filter to which the present invention is applied.

4 is a driving circuit diagram of a multi-row liquid crystal display to which the present invention is applied.

5 (a) and 5 (b) is an exemplary printing of the present invention.

* Explanation of symbols for main parts of the drawings

100 liquid crystal display unit 200 photosensitive medium

R'1,... , R'm: R color filter G'1,... Gn: G color filter

B'1,... , B'k: B color filter LR, LG, LB; R, G, B liquid crystal

S1,... , Sh: Source

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for controlling liquid crystal imaging of a video printer, and more particularly, to a method for controlling liquid crystal imaging of a video printer that is suitable for simultaneously improving and shortening the resolution and print time of a liquid crystal imaging apparatus.

Two methods are widely used in the printing method of a general video printer.

First, referring to FIG. 1 (a) to FIG. 1 (c), the multi-row liquid crystal imaging method will be described. As shown in FIG. 1 (a), the liquid crystal display 100 is fixed and the photosensitive medium 200 is fixed. ) Is moved to the first line R'1 of the liquid crystal display unit 100 while the horizontal scan pulses R11, R12, ..., R1h are applied to the source lines S1, ..., Sh at the same time. After scanning the first line while applying the R signal voltage, the photosensitive medium 200 is moved to the R'1 and R'2 lines of the liquid crystal display 100 as shown in FIG. Signal voltages r2: r21, ... r2h, r1 are applied to the source lines S1, ..., Sh while applying horizontal scanning pulses R11, ..., R1h, (R21, ..., R2h) to the lines R1R2, respectively. : r11, ..., r1h) is applied and scanning is performed.

That is, the liquid crystal is driven by applying the R signal voltage r2 of the new second line to R'1 and the R signal voltage r1 of the first line to R'2.

As described above, gate pulses are sequentially applied to the gate lines while the photosensitive medium 200 is shifted by one line, and the signal voltage is applied to the common drain line in synchronization with the gate pulses, while R, G, and B lines are applied to one line of the photosensitive medium. The same video signal is applied a plurality of times.

Meanwhile, referring to FIG. 2 (a) and FIG. 2 (b), the printing method using the blocking film will be described. In FIG. 2 (a), odd-numbered data D1, D3, and D5 of the data for the R signal are illustrated. , ..., Dn-1) comprises two filters (R _O, R _E) an R signal, the exposure through the R _O of in a state of being supplied to a filter (R _O) the signal processing at the color filters in the LCD pannael In this case, half of the R _O filter is blocked by a blocking film as shown in FIG.

When the exposure of the R _O filter part is completed, the exposure sheet is moved by the width d of one line of the filter, and the portion exposed by the R _O filter is placed at the position of the R _E filter.

Even-numbered data out of data for the next R signals (D2, D4, D6, ... , D2n) a R _E filter in a state of being supplied with a signal processing procedure in one more filter (R _E) of the color filter of the LCD pannael through The passed R signal is exposed to the exposure sheet. In this case, while the exposure is passed through the R _E filter, R _O is supplied with a signal voltage corresponding to horizontal synchronous, and the above process is repeated. The exposure method by R _O and R _E of the R signal as described above, The same goes for G _O , R _E, and B _O , B _E , resulting in exposure to the entire R, G, and B signals.

However, in the former case, the resolution is improved or the print speed is slowed down by the exposure time, and in the latter case, the print speed is improved or the resolution is poor.

The present invention has been devised to satisfy both resolution and print speed by compensating each other's shortcomings by negotiating a multi-row driving method and a blocking film using method to solve such a conventional defect. It will be described in detail with reference to one drawing.

3 is a schematic diagram of a color filter applied to the present invention, and as shown therein, with an odd number of filters (r ₁₁ , r ₁₃ , r ₁₅ ...) And an even number of blocking films (r ₁₂ , r ₁₄ , r ₁₆ . The R _O1 filter is formed of an R _E1 peter using an odd number of blocking films (r ₂₁ , r ₂₃ , r ₂₅ ...) And an even number of filters (r ₂₂ , r ₂₄ , r ₂₆ . The G (Green) filter and the B (Blue) filter were also configured in the same manner as the R filter.

4 is a driving circuit diagram of a multi-row liquid crystal display to which the present invention is applied. As shown in FIG. 4, each R gate line [(R1),... , (Rm)], and the thin film transistors [(R11, R12, ..., R1h) having a gate connected in common. , (Rm1, Rm2, ..., Rmh)] in each of the R color display liquid crystals ((LR11, LR12, ..., LR1h),... , (LRm1, LRm2, ..., LRmh)] and each G gate line [(G1), (G2),... , (Gn)] and a thin film transistor [(G11, G12, ..., G1h) having a gate connected in common. , (Gn1, Gn2, ..., Gnh)] to the respective drains of the G color display liquid crystals [(LG11, LG12, ..., LG1h),... , (LGn1, LGn2, ..., LGnh)], and a thin film transistor [(B11, B12, ..., B1h) having a gate connected to each of the B gate lines [(B1), (B2), (Bk)] in common. ),… And B color display liquid crystals ((LB11, LB12, ..., LB1h), ... in each drain of (BK1, BK2, ..., BKh). , (LBk2, LBk2, ..., LBkh)], and then the line R, G, and B liquid crystal drive thin film transistors [(R11, R21, ..., Rm1), (G11, G21, ..., Gn1), for each pixel. (B11, B21, ... Bk1)]. … Source (S1, ..., Sh) of [(R1h, R2h, ..., Rmh), (G1h, G2h, ..., GnH), (B1h, B2h, ..., BkH)] The present invention is described in detail as follows.

Basically, it is similar to the multi-row method, but in the RGB line filter, the data of the same horizontal line of the drain is separated and exposed to the odd-numbered and even-numbered through two line filters. The exposure method thereof will be described below.

The odd-numbered data (S1, S3, S5, ..., Sn-1) of the data for the R signal is one of two filters (R _O , R _E ) in the color filter in the LCD panel for signal processing. _In the state supplied to _O ), the R signal passing through R _O is exposed to the exposure paper. At this time, half of the R _O filter is blocked by the blocking film to prevent passage. When the exposure of the R _O filter part is finished, the exposure paper is removed from the filter. The width d of one line is moved and the portion exposed by the R _O filter is placed at the position of the R _E filter.

Second even among the data for the next R signal having Atta (D2, D4, D6, ... D2n) is a R _E filter in a state to be supplied to the color filter one more filter (R _E) of the LCD panel via the signal processing The passed R signal is exposed to the exposure sheet. At this time, during the exposure through the R _E filter, R ₀ is supplied with a signal voltage corresponding to the next horizontal synchronous, and the above process is repeated, and the exposure method using the R signal and R _O , R _E as described above is G. _The same goes for _O , G _E, and B _O , B _E , and as a result, the whole is exposed to R, G, and B signals.

That is, when the 5 (a) even with the exposure of the odd-numbered data of the first line for the R _O1 end as in the initial state 1D by and upward movement relative to the LCD unit exposure moving direction, R _E1 is an even number on Line The second data is exposed, and when this operation is finished, the LCD unit is moved upward by 1D again as shown in FIG. 5 (b), and the next exposure operation is performed, and R'1 has the R signal voltage of the new second line. r2) is applied to R'2 by applying the R signal voltage r1 of the first line to drive the liquid crystal, and in this manner, gate pulses are sequentially applied to the gate lines while shifting the photosensitive medium 200 one by one, By applying the signal voltage to the common source line in synchronization with the gate pulse, the same video signal is applied to R, G, and B a plurality of times to one line of the photosensitive medium.

However, in the multi-row method, the number of video signals in the horizontal direction supplied to the source is doubled by A / D conversion of the input video signal at twice the sampling rate as before.

(r _1h … r _vh ) → (r _1h '… r _vh ')

(g _1h … g _vh ) → (g _1h '… g _vh ')

(b _1h … b _vh ) → (b _1h '… b _vh ')

Where h '= 2 x h.

As described in detail above, the present invention provides a tradeoff between the blocking film and the multi-row method. The resolution, which is a disadvantage of the multi-row method, is compensated by the blocking method, and the exposure time (print speed) problem, which is a disadvantage of the blocking film, is compensated by the multi-row method. This has the advantage of satisfying both resolution and print speed.

Claims (1)

Two horizontal line filters ([R _O1 , R _E1 ), (R _O2 , R _E2 ) _,. ] To expose the data of the same horizontal line of the source divided into odd and even numbers, but when the exposure of the odd-numbered data of the first line to R _O1 is finished in the initial state, the LCD unit is moved upward by only one horizontal line, The new odd-numbered data is exposed to R _O1 , and the even-numbered data of the first line is exposed to R _E1 , and then the LCD unit is moved upward by one horizontal line to repeat the above process. Control method.