TW553845B - Driving method and driving circuit of optical write head - Google Patents

Abstract

The present invention relates to an optical write head, which is capable of highly and precisely correcting a deviation in a secondary scanning direction of a light point array on an optical drum in the optical write head having light-emitting element array chips mounted in a linear arrangement. Image data corresponding to the self-scanning light-emitting element array chips is arranged together with a shift into a memory prepared for image data in accordance with a distance between array chips, in which image data is read out sequentially from the memory in a physical arrangement order of the memory to drive each array chip. The generation timing of a start pulse supplied to a start pulse line of the self-scanning light-emitting element array chip is adjusted in accordance with a mounting position deviation amount for each array chip. The process of arranging the image data with the shift into the memory is carried out by using a software when the image data is developed to the memory.

Description

553845 V. Description of the invention (1) [Technical Field] The present invention relates to a driving method for a light writing head using a previous printing machine and a driving circuit for driving the light writing head; a known light emitting element array The wafer is equipped with a self-scanning light-emitting element = method. In addition, the present invention relates to a composition method. The light amount correction method of the optical writing head of the first array chip [Background Technology] The writing head of an optical printer is exposed on the photosensitive drum, and the light source is used to make light available. The light-emitting dots formed by the light array of the optical writing head. Have a salty # 西 9 夕 本; The principle diagram of the machine is shown in Figure 1. In the cylindrical shape (photoreceptor). Sexual material

It is a speed of β π 1 ^ to rotate the 豉. Use the charger 4 to apply a medium to the surface of the photoreceptor rotating Ning Zhiyan so that the image of the dot to be printed is at 1. Then, tf is used at 6 positions of the optical write head. & First, shot on the photoreceptor, used to neutralize the light irradiation energy / salt umbrella II 4, using the developer 8, according to the charged state on the photoreceptor; turn ^: add toner. Then, Use the transferer 10 to stack the two color papers:-The paper 12 is sent to the paper 1 4. The fixer 16 fixes the surface, and then sends it to the stacker 18. In addition-side: use Drum: Use the erasing lamp 2 ° to completely neutralize ..., and J use β% state 2 2 to remove the remaining toner. Structure of the optical writing head 6. The optical writing head 6 is composed of the light emitting element array 24 and the column 26. In the structure, the focal point of the lens is combined on the photosensitive drum 2. The structure of the rod is, for example, formed by concentrating the rod lens. On the other hand, the inventors have noticed the structure of the light-emitting element array.

C: \ 2D.G0D Gu · _1125_ _ Page 4 553845 V. Description of the invention (2) The 3-terminal light-emitting gate fluid with ρηρη structure of the component can realize the self-scanning of the light-emitting points, as shown in the already filed patent application ( Japanese Patent Laid-Open Publication No. 238962, Japanese Patent Laid-Open Publication No. 2_1 4584, Japanese Patent Laid-Open Publication No. 2-92650, and Japanese Patent Laid-Open Publication No. 2-9265 1 as light sources for optical write heads (light sources for optical printers) ) It is easy to assemble, the pitch of the light-emitting elements can be narrowed, and a small light-emitting element array (light-emitting device) can be produced. In addition, the inventors have proposed a self-scanning light-emitting element array, which has a light-emitting element array. For the separated structure, a transfer element array composed of a ^ shutter fluid having a ρηρη structure is used as a shift register (Japanese Patent Publication No. 2-2 6 3 6 6 8). 'FIG. 3 shows an equivalent circuit diagram of the self-scanning light-emitting element array (cathode type for 2-phase driving i). This light-emitting element array is composed of a switching element factory and ~ τ4 'light-emitting elements Li ~ L4 for writing. The switching element part is connected using a diode. VGK is a power supply (typically 5V) and is connected to each of the switching elements via. In addition, the gate electrodes G1 to g3 of the switching element ^ are also connected to the gate of the light-emitting element for writing. The gate electrode of the switch element T] is applied with an arterial wave. The β-electrode is alternately applied with a clock 0 i0 2 for transfer, and the anode of the field is applied with a write signal 0 ι.冩 用 I 光 元 Figure 4 shows the pulse wave waveform of the arterial wave ~ 'for transfer, and the pulse wave shape of 仏 Yin enters 仏 A. 0 丨, 0 2-bit write ratios (working ratio) are approximately 1: 1. + Pan and L level time The following briefly describes the operation of the circuit shown in FIG. When forwarding first

553845 V. Description of the invention (3) The electric power of pulse 0 1 is at a high level, and at this time, the potential emission of the gate electrode A “two cattle / 2 becomes 0N state. The effect of the drop is conveyed through the diode 1> 2 To the electrode electrode G is large ”7. This potential f is large, = the two poles are called the forward rising voltage (such as; extension 2: the potential connection of coincidence, 1 = wide shape :, '' so no interpolar electrode surface The potential of the ON thunder m 4 electrode G1 becomes 5 V. The ON potential of the light-emitting gate limb is approximately 1 "approximately the same as that of the gate electrode gate actuator, so the next one is set to approximately 2 V (make The switching element T level is approximately 4V (the switching element τ is performed; the second voltage is required) is performed with only the switching element by 3 to perform 0N ,; ON: two, so, when the transfer is used, it is the arterial artery. Wave & 疋 The pulse wave 0S used to start this transfer action becomes the L level (approximately ov), ^, the start level (approximately 2V ~ approximately 4V), and the gate-k with 柃 pulse 4 2 becomes Η Pulse ~ Return to Η level immediately. # ①1 becomes 0Ν. Then, when the low second is activated / Λ 开 卢 关 广 牛牛 2 is in the ON state, the potential of the closed electrode is low In VGK (assuming ⑽ here), the voltage at which the voltage A becomes large is the diffusion potential of the pn junction (large U / two writes, the light emitting element is called the light emitting state. (Large, · claw) or more, It is possible to make a wide range; the two-pole electrode G1 is about 5 V, and the inter-electrode S becomes about IV. Therefore, the write voltage of the writing voltage component L3 of the light-emitting element Li becomes large. Therefore, to the light ^ The voltage of the write signal ~ is in the range of 1 ~ ". When i =: LL: 1 ^ · Page 6 C: \ 2D-O0DE \ 92-01 \ 91125020.ptd 553845 5. Description of the invention (4) ON, that is, when entering the light-emitting state, the light-emitting intensity is determined by the amount of current flowing in the writing mark 0 !, and the image can be written at any intensity. The other two are to transfer the light-emitting state to the next light-emitting element. It is necessary to temporarily lower the voltage of the written ^ number 0! Line to 0V to temporarily turn off the light-emitting light element. This self-scanning light-emitting element array can be connected when compared with a normal light-emitting element array. Lining reduction is its feature. Using this can reduce the chip area as its advantage. When a light-emitting element array of the type is applied to an optical writing head or the like, a plurality of light-emitting element array wafers are arranged in one direction and two are sent to the corresponding light-emitting elements on the light-emitting element array wafer to make the light-emitting element emit light. In the conventional optical write head, when multiple light-emitting element arrays are aligned in one direction, due to the skew of the optical write head itself, the assembly of the assembled wafer ^ is accurate, and the arrangement of the lens array changes, etc. This will be referred to as the main scanning direction) in the orthogonal direction (in the direction of the secondary library drawing). With this optical writing head, when the gas point is projected onto the photosensitive drum, each light-emitting element array crystal 'The material of the offset arrangement will move on the light spot on the photoconductor drum, and the direction will be shifted towards it. Wang Taili /, the offset vibration of the film In the conventional light writing head, for each luminous image memory, the circular image data is exhaled, and the time is adjusted by using electricity;

C: \ 2D-CODE \ 92-0I \ 9112502O.ptd Page 7 553845

V. Description of the invention (5) Adjust the timing of transferring the image data to the corresponding light-emitting element on the wafer to correct the offset of the sub-scanning direction. Therefore, each light-emitting element array chip needs to be combined to adjust the circuit. In addition, since the timing is adjusted for each chip, the setting value of f: -chip memory timing is required. In addition, the supply to The timing of the generation of the arterial wave from the arterial wave is synchronized with the set value, so there is a problem that the circuit structure becomes complicated.

In addition to 1, and 1, in the case where a self-scanning light-emitting element array is applied to an optical write head, if a connecting pad is arranged at both ends of a rectangular wafer, the width of the wafer can be reduced to that required by the connecting pad itself. Amplitude. However, when a plurality of wafers are arranged in one direction, the interval between the two rows of light emitting points cannot be fixed at the wafer end. In order to avoid such problems, a so-called sawtooth arrangement method is used to arrange a part of the wafers so as to overlap (refer to Japanese Patent Application Laid-Open No. 8-2 1 6 4 48).

Figure 5 shows the method of the sawtooth arrangement. For the convenience of explanation, the xy coordinate axis is determined by the method * as shown in the figure. That is, the χ-axis direction is the alignment direction of the wafers (main scanning direction), and the y-axis direction is the direction orthogonal to the alignment direction of the wafers (sub-scanning direction). The self-scanning light-emitting element array wafer 28 is provided with connection pads 30 at both ends, and a light-emitting element 32 is provided therebetween in a linear shape. Such a light-emitting element array wafer 28 is shifted in the y-axis direction so that both ends of the wafer are overlapped, arranged in a zigzag manner in the x-axis direction, and fixed on the substrate with an adhesive. With this arrangement, all the wafers are covered, and the interval in the X-axis direction of the light-emitting element can be made constant. However, when the light emitting element array wafer is arranged in a jagged light,

C: \ 2D-CODE \ 92-01 \ 91125020.ptd

553845 V. Description of the invention (6) A write head, when projecting a line of light dots onto a photosensitive drum, the part where the crystals are shifted and arranged, the light dots on the photosensitive drum will be d:

Segment difference) 'As a result, a step difference equivalent to the offset of the light emitting element array wafer is also generated in the output image. When the image is output by the optical write head, the image data on the memory is transferred to the light-emitting element corresponding to the light-emitting element array as desired, which is used to make the light-emitting element emit light. ^ 的 份 ^ The time of the data is the number of times that the w part is sequentially lit:: The time when the element is projected on the photosensitive drum, and χ is rotated at this time. During Dingmen's period, the photoreceptor drum is also in the sub-light emitting element array wafer ranked first in the odd number of teeth. When the reference wafer is the odd number, the key is the even number wafer. When the projection odd-numbered light arrives, it lights up. Before each light-emitting element array = = ^ give the arterial wave line from the arterial wave line to two = the shift of the time of lighting. The juice is used to realize the shift in the y-axis direction of the light-emitting element array wafer in a zigzag arrangement, and for each one, > The correction of the direction shift reduces the shift of the light spot rows projected on the light of the photosensitive drum to produce a day-to-day sequence. It is therefore used in the conventional optical write head to prepare a circuit that needs to be combined to adjust the timing. In addition, "m slices adjust the timing, so it needs to be complicated for each chip = mother-piece. The set value of the heart and sequence is because of page 9 C: \ 2D-CODE \ 92-01 \ 91125020.ptd 553845 V. Description of the invention (7) In addition, the production of a tracing light-emitting element array is known by, for example, arranging a plurality of light-emitting element array wafers with a length of 1 2 8 (a length of about 5.4 mm). Multiple pieces are made on a wafer and obtained by slicing. Usually, the light amount of the light emitting points of the obtained wafer is not uniform, which will cause irregularities. Such uneven light amount distribution will cause The quality of the image is reduced. A person skilled in the method of light distribution is disclosed in Japanese Patent Application Laid-Open No. 2000-602-2. According to this method, the correction data used to correct the lighting time of the light-emitting element, The ROM held in advance in the driver circuit for driving the self-scanning light-emitting element array is used to adjust the lighting time of the light-emitting element based on the correction data to perform light quantity correction. Fig. 6 shows the driver circuit 9 and the arrayed light-emitting elements. Array chip connection lines. In order to simplify the figure, the figure shows five chips 28-1, 28, 5-5. As can be understood from the figure, in the driver circuit, the clock 0, 1, 0 2. The arterial wave 0S is generated in each chip together, and A is generated in each chip individually. Wan Yishi said

In the case where an image having a density is printed using a light printer, a tone expression is required. One method of expressing the tone of a light printer is the area tone method. The area tone method is to divide one pixel vertically and horizontally into subdivisions, and subdivide them into dots, and each dot is expressed in binary (0N, 0FF). For example, in the case of 256 tones, as shown in FIG. 7A, one pixel is subdivided by X 16 points, and the hue is represented by the number of bits of on in one pixel 11. … But ’In this area toning method, to get more tones,

553845

V. Description of the invention (8) 1 pixel 1 1 is subdivided into more points 1 3, so a very high-definition optical write head is a problem. To avoid this problem, the hue method is to make a hue table for each point in the area hue method. For example, as shown in FIG. 7B, one pixel 15 is subdivided into 8 points by 8 points, and each point is represented by 4 tones, 1 3, which is used to substantially realize 2 5 6 tones. In this case, the tone data of each bit generated by the driver circuit becomes 3 bits (only 2 bits become insufficient when indicating the density of the off and 4 stages). / In the case of printing images in this tone representation, to achieve light quantity correction using the optical write head with the self-scanning light-emitting element array described above, the drive circuit of the optical write head of the tone method of FIG. 7A cannot be used directly . That is, the driver data of one bit of image data is one bit. It is not possible to directly use the tone data of one dot to be multiple bits. A special way is required. ["Disclosure of the Invention] The purpose of the present invention is to provide a method for driving an optical write head, which can be corrected with high precision even when the accuracy of assembly in the sub-scanning direction of the light-emitting element array wafer is eased during image output. Offset of the sub-scanning direction of the light spot rows on the photosensitive drum. Another object of the present invention is to provide a drive circuit and a drive method for an optical write head. In each light-emitting element array wafer, it is not necessary to adjust the arterial wave. The timing generating circuit can correct the deviation of the scanning direction of the light spot rows on the photosensitive drum. Another object of the present invention is to provide a method for correcting the light amount of an optical write head.

553845 5. In the description of the invention (9), the optical write head uses multiple bits to express the hue of each point, and the light quantity can be corrected by using a special circuit. 'And the first aspect of the present invention is a driving method of an optical write head. A light emitting element array wafer is arranged, a plurality of light emitting elements are arranged in a shape, and a plurality of light emitting elements are driven in a time-sharing manner. Included steps = · Adjusting steps, using the sub-scanning position of the light spot rows projected on the photoconductor drum to adjust the timing of lighting the light emitting points of each light-emitting element array crystal field ^; and points The light-emitting step is in accordance with the above: (1) The initial light-emitting point of the light-emitting element array wafer. The 72nd second aspect of the present invention is a driving mode of an optical writing head for time-sharing driving of the optical writing head. It is characterized by the inclusion of an adjustment step that utilizes two points of light points projected on the photosensitive drum. The position shift amount is used to adjust and light up each light-emitting element array. :::: The material is transferred to each light-emitting element array. The crystal character sequence is based on the initial light-emitting point of each light-emitting element array wafer. The aspect is an optical write head: the driver assembles each light-emitting 7C array chip, and a plurality of light-emitting elements driven by the V ^ write head in a time-sharing manner g :: the light-emitting elements are toothed, so that the above light-emitting element array is θθ The wafers are arranged to saw the light emitting element array wafers = the element I, the direction of the orthogonal direction of the line time, the integer number of the distance on the photoreceptor drum stands up straight 2, and becomes a move 1. Steps: adjustment steps, using projection At $ 8, the step included in the convergence is to cut the first scan of the light dot line on the side scan. $ 12 page c · \ 2D-CODE \ 92-Ol \ 91125020.ptd Function 845 V. Description of the invention (10) — ΓΓΓ The fourth aspect of the entire light-emitting element array wafer is A type of optical write head 2 ::: piece array ... will be configured with === ::;: = 'row :! becomes -toothed, so that the interval between the wafers is doubled as each light-emitting element array in the positive direction of Α ° Its characteristics are: interval; ί: the integer of the distance on the drum 蛊 * * Nu Gu has .6 Jiyi, the capacity is used to hold the image data corresponding to the countable light-emitting element array chip , Luminous upper element ^ several times 1 value) x (Transfer image data during the 1-line time period i Write to: Description II.% Value of / 2 and transfer device, starting from the moment X of the original data After the time (the value of the integer multiple mentioned above) has elapsed, the data is read from the above-mentioned memory, and is transferred to the odd-numbered light-emitting element array chip as an asset. The fifth complaint of the volume is a kind of optical writing The drive circuit of the head is arranged in a zigzag pattern in the first 70 array wafers of the light X, so that each light emission in the orthogonal direction of the arrangement direction of the above-mentioned light-emitting two pieces is moved by one line of time on the photosensitive drum.疋: The capacity of the 'memory' is used to maintain (the value of the integer multiples above) χ (turn during the period of 1 line =

553845 Description of the five inventions (ll) _ ίίί value): 2 value; and the transfer device, from the time of the original information ", 2 from the time of the above Ji Yiyi, after passing (the above integer 枰 之 佶 X (1 line After time), 'read the data from the above memory? The sixth aspect of the present invention is to drive the optical writing head, the Ba chip, for the transfer of the image to the even-numbered light-emitting element. Assembly For each light-emitting element array wafer, a plurality of light-emitting element array wafers configured with a plurality of light-emitting element write-heads are arranged into a zigzag shape, and ^ is a light emission in the orthogonal direction of the arrangement direction of the light 7L array wafer = 发 ϊίϊί The interval of the centerline of the light-emitting Γ 亍 becomes an integer multiple of the distance on the 7w car feel first when moving. It is characterized by the included steps that make (the value of the above integer multiple) χ (during the time of the! Line). =., The number of components) The image data corresponding to the even-numbered light-emitting two-picture array chip, and the image data corresponding to the odd-numbered light-emitting element wafers are used for image data. Prepared food ^ up, moved And the transferring step, according to Zhao Physics ^, sequentially read the image data on the memory and transfer the image material to each light-emitting element array chip. A seventh aspect of the present invention is a The driving method of the optical writing head is to assemble each light-emitting element array wafer in light, and arrange a plurality of light-emitting element array wafers arranged in a dot shape to form a plurality of light-emitting element array wafers which are orthogonal to each other in a direction orthogonal to the arrangement direction of the sawing wafer. ： The interval of the center line of the heart's light spot is' moving! The line time is an integral multiple of the distance on the light-sensitive frame; it is characterized by the setting step of making (the value of the above integer multiple) X (w-line time ;: two: Send the picture on page 14 C: \ 2D-00DE \ 92-01 \ 91125020.ptd 553845 Description of the invention (12) Number of light-emitting elements like image data) Value * Array crystal > {pair temple + m · / 、 Corresponds to the numbered light-emitting element chip; V ·: asset: 隼 = matching of the even-numbered light-emitting element array memory, 値 ΐ in the ° transfer step, I according to the physical-placement order, successively Read the above-mentioned _ 55 H ΡΙ # α material, the figure is silly and cautious, ， heart The image above: Kou Jiabei is transferred to each light-emitting element array. The δ aspect of the present invention is a light writing head | '歹: said film: /, equipped with a self-scanning light-emitting element array, 柙 摅 i The image 构成 composed of 4 + tone data is used to = should be written out according to the -continuous color to the above-mentioned white " secondary production " signal, and it will be turned out to be accompanied by a bovine: knowledge-type light-emitting element array; It is characterized by the steps involved in obtaining light quantity correction data and maintaining it; obtaining the above-mentioned light quantity correction information ___________ based on the obtained exposure? Li: The color tone ㈣ ^ "like a bucket" is used to adjust the writing signal to each light emitting point of the above-mentioned self-scanning type light emitting element. [Best Mode for Carrying Out the Invention] Hereinafter, a description will be given of a first embodiment of the invention with reference to the drawings. The first method of driving the optical beam writing head according to the first aspect of the present invention, even if the assembly accuracy in the sub-scanning direction of the light-emitting element array wafer is relaxed, the accuracy can be corrected on the photosensitive drum when outputting the image. Offset of the sub-scanning direction of the light spot line. First, a first embodiment of a method for driving an optical write head will be described. FIG. 8 shows the arrangement of a self-scanning light-emitting element array wafer on an optical writing head.

553845 V. Description of the invention (13) The substrate becomes approximately linear. Determine the seatpost shaft as shown. The X-axis direction is the alignment direction of the wafers (main scanning direction). The light emitting points on each self-drawing light-emitting element array wafer are sequentially shifted in the x-axis direction by one point from the leftmost light emitting point to light up. At the timing of this shift, each light emitting point is lighted for writing of an image. In addition, the :: face is the direction orthogonal to the alignment direction of the wafers (sub-scanning direction), and becomes the same as the paper feed direction. Self-scanning, the light-emitting element array wafers c0 to c3 are provided with 256 light-emitting elements 3 n = / V 疋 = spaced linearly, and each light-emitting element array wafer C is aligned along the linear light-emitting element. ~ C3 are arranged as "lines", but since the light-emitting element array wafer is assembled on the substrate, the mechanical accuracy will shift in the "direction". Here, the center line of the wafer row is used as a reference to measure the wafer offset H L2, L3 ', and the result is L. : —U _, Li = _15 Μ, L and 5 m, and L3 = 0 // ra 〇 $ That is, the light-emitting element array wafer c. All ~ C3 are lit, and they are drawn. Due to the influence of the wafer offset L0 ~ L3, as shown in Fig. 9, the straight lines on the paper are drawn as not straight. Each band in FIG. 9 depicts dot-shaped light formed by light emitting elements from t wafers. The strip of each wafer is not parallel to the x-axis. When drawing a line, the paper advances in the y-axis direction. In addition, the light emitting points are arranged at 12,000 (1,200 dpi) per one inch, and the interval between the light emitting points is approximately 21 · 16 // m. In addition, when drawing the line, the paper also advances. 21. 1 6 // m 〇 Figure 10 shows the data used to depict the above-mentioned Figure 9 stored in the memory

553845 V. The method described in (14). The data in the figure is read out according to the physical memory configuration order. The arrangement in the vertical direction is the image data corresponding to the light-emitting points of each light-emitting element array wafer. (WXYZ) represents the value of the data of the number WXYZ (h) (0 or l) ((h) represents hexadecimal). In addition, W (h) represents a line number of image data 'X (h) represents a wafer number' Y Z (h) represents a light emitting point number of each wafer. For example, (123E) represents the image data of the light emitting point No. 3E (h) of the second wafer C2 of the first line. In Fig. 10, when looking at the data in the horizontal direction, all the data are only different from X, and the other W, γ, and z are the same. That is, the data of the same light emitting point number of the same line is read out at the same timing.

Second, the data is shifted on the memory to correct the offset in the y-axis direction. FIG. 11 shows the storage manner of the data in this case. As described above, the deviation of the 7-axis direction of the wafer in FIG. 8 is “• η, L2 = -5 / zm, L3 = 〇 " m. Since the paper is transported in the + y-axis direction, When the starting point of the drawing is c3 as the reference, 'delay ^ is equivalent to Cl with the smallest amount of delay as the reference, and the delayed part is Aida branch, i5 " m. When making 256 light-emitting points m, the distance that the paper is conveyed in the heart direction The number of shifts for 2116 ”is 4 / 2ι.16χ 256 and

… ⑻ ^ / 21 · ΐ6χ 256% Β5〇ι). In addition, in the case of scanning the scanning light-emitting element array chip, since the drawing is started by starting the logical product of the J clock from 01, the memory is moved up and the even number is selected. Therefore, it is necessary to use 0 要 to 另外 In addition, Figure η indicates the starting ⑽ 用 used for each chip.

553845 V. Description of the invention (15) ^

Lim is expected to be stored at γζ⑻ = °° (h). , Outside the farm <WM々 storage1. The one used here is self-except: ¾ piece is when the arterial wave is acting. The clock of 01 becomes: 'The first two pieces of array and the 1st gate fluid are turned on. According to this method, the shifting unit is arranged on the memory: the sequence of the rational memory reads out the activation section 'the image data can be obtained according to the special circuit', and no image data is needed. The result is shown in Figure 12. In the above method, using one of the luminous points and the distance of the paper to be transmitted, the resolution of the 1 敕 i value can be used to make the unit more accurate. Adjustment. In addition, the address ^ t2Kl6 # m / 128 = 0. The address is 1½. Maybe I nr 矣-, the image memory written by the warrior ^ I 纳 0 (It means that there is no image written in it. : Position, the processing configured in the above-mentioned memory can also be used to make the rest of the image unfolded on the memory, using software. The second embodiment will be described below. Name flute 1 # μ # The starting sequence is expanded on the memory example. On the same day, ==, middle is the same; like data and u 丄 N inch order transfer, you do not need to prepare, you need to correct the 5 &quot; axis direction offset. However, Memory capacity: To be doubled, in addition, the line for transmitting data must also be doubled. In the second broadcast: 歹 ',' No need to prepare a device to generate the startup sequence. Figure = Device to generate the startup sequence The circuit diagram, Figure 14 is a timing diagram for explaining the operation. 0 2 clock 61 is input to the CLK terminal of the counter 49 and reset pulse 60 is input to the RST terminal. The counter 49 counts the reset pulse 6. 01 after rising page 18 C: \ 2D-C0DE \ 92-01 \ 91125020.ptd 553845 V. Description of the invention (16) &quot; ------: the number of rising pulse 61 On the other hand, the start timing setting value of each chip is stored in the memory 53-10. The device 52-0 compares the setting value of the memory 53_〇 with the count output from the counter 49 and the data 80. "When the two are consistent, output", ", if not, output" "as the comparator output 54-10 to the NAND gate 51-10, ΝΑ = gate 51-0 to obtain the comparator output 54-0 and The result of the nand operation between 01 clock 61 and 61 is used to output the arterial wave 55 —〇. Similarly, the comparator 5 2 -1 makes the setting value of the memory 5 3 -1 and the count data 80. = compare, use To output the comparator output 54-1, the NAND gate 51 -1 obtains the NAND operation result between the comparator output 54-1 and the 0 1 clock 61, which is used to output the arterial wave 55-1. The comparator 52 makes 2 The setting value of the memory 53-2 is compared with the count Gong = 80, which is used to output the comparator output 54-2. The Na rib gate 51-2 obtains the nand between the comparator output 54-2 and $ j clock 61. The calculation result is used to output the arterial wave 55-2. The comparator 52-3 compares the set value of the memory 53-3 with the count data 80, It is used to output the comparator output 5 4-3, and the NAND gate 5b 3 obtains the NAND operation result of the comparator output 54-3 and 0. The clock 61 is used to output the arterial wave 55-3. Figure 14 shows the weight Suppose that the pulse wave 60, 0 j, clock 61, and 2 clock 62 are required, and the output ratio is 54-0 to 54-3, and the timing of the arterial wave 55 to 10 to 55 to 3. w A third embodiment will be described below. In the second embodiment, since a comparator, a comparator, etc. are required, the circuit configuration becomes complicated. Therefore, in each of the third examples, a memory (half of the number of light-emitting elements contained in one self-scanning light-emitting element array chip x X) (half of the number of chips) is prepared, and the arterial wave is memorized in FIG. 4 55-0 ~ 55-3, with sequential reading synchronized with the image data, can be

C: \ 2D-0QDE \ 92-01 \ 91125020.ptd Page 19 ^ 3845 5. Description of the Invention (17) The same effect as that of the second embodiment can be obtained. The fourth embodiment will be described below. The first piece is arranged into two rows of straight lines, and W becomes the light emitting element array crystal line 'assembled it to the optical writing head ... The approximate straight line of the two rows of the staggered configuration 15 shows that the self-scanning type hair Direction, y pumping direction is the sub-scanning direction ... axis: f 疋 "of the main scanning wafer c. ~ C3 is provided with 4 lines at both ends: the light-emitting element 33 of the tracing light-emitting element array U6 becomes The interval P sets the element array chip C t complex, self-scanning light emission ^ -P-: (r; # ^ # 33-copies: the number of cutting pieces of λ at the time of the r line, projected on the sensing end The interval of the X-axis direction of the luminous point χ χ Υ Day: Inverse time, two whites-playing parting politics, feXl 'χ2, \ all temples in ρ, covering many

=! For all the array wafers, the distance between the optical elements 33 in the X-axis direction becomes a constant value P. The Γ-type light emitting f-piece array wafer c is used. ~ C3 is all equipped with U: A # "Even-numbered wafer C., C2 and odd-numbered wafer C &quot; C3 are faced by η. 0, the direction of the light-emitting point transfer is right, and Ci, c3 are from right to Left. On the 2 d day, η is set to Xl—X2 = X3 = P, dl == d3 = nP (n is a natural number) '^ ^ 1, 2, and ds are the center lines of the light emitting point rows of the CG chip. Page 20 C: \ 2D-CODE \ 92-01 \ 91125020.ptd 553845 V. Description of the invention (18)-: --- Production distance> 1. However, because the mechanical accuracy of the wafer when assembled on the substrate S Temple 'will deviate from the ideal value. At this time, all the examples of straight lines drawn when the image data is not adjusted are shown in Figure 16. An example of the straight line drawn will cause the stage difference to cry, and the day quality will become lower. The same as the first embodiment , So that the image data is moved up in memory ^, which is equivalent to d〗, tun, and d3. In this case, the data of the wafer Cn can be shifted relative to the crystal η ′ ′ / 21 · 1 6 X 256 Bits (this type of 4 之 is expressed in Vm).

Κ 贝 J 之 、、、 口 果 敦 一 4 8 // m, Tun = 4 // m, d3 = 4 4 // m. Therefore, the start-up date of each film can be shifted on the e-memory by delaying the number of parts by 44. Ci is 48/21 · 16 X 25 6 = 580 bits, and q is 21 · 1 6 X 2 5 6 = 48 bits, q is 44/21 · 1 6 X 256 = 532 bit injuries. Therefore, the timing of the arterial wave is the same as that of the first embodiment. Only when (h) = 0_0 (h) is the data line "1" prepared. The result of the correction is shown in Fig. 17, which can make the straight lines connect well.

In the fourth embodiment, the timing of the arterial wave is provided in the memory as in the method of the first embodiment, but the arterial wave can also be generated by another circuit as in the method of the second and third embodiments. In the case of the second and third embodiments, it is not possible to specify an offset of more than one and a half of the number of light emitting points contained in the self-scanning light-emitting element array wafer. For example, in a case where the image data of the chip &amp; is shifted by 580 bits, in the second embodiment, the memory storing the set value of the start timing is set to half of 29 bits, but it may be Do not put a value above 1 28. Instead, put the remainder 34 divided by 290 divided by 128 (290-128-128 = 34). In this case, the 68-bit delay chip &amp; started drawing, but because the image data became 0 (indicating that no image is written)

C: \ 2D-CODE \ 92-Ol \ 91125020.ptd Page 21 553845 V. Description of the invention (19) material), so there is no problem _ In addition, the situation described in the above embodiment is-256 pieces The self-scanning light-emitting element array of three light-emitting elements has three mother crystal element arrays, but it is not limited to this structure. The number of branches: the number of light-emitting light-emitting 7C element array chips can also be any number. Scanning and Pushing In addition, in the embodiment described above, the array chip is arranged in one line or approximately two lines, but the case where the 2I optical element J is three lines or more. In addition, it can also be used in the case where the wafer is aligned by the alignment machine. The direction of the drawing of the J section varies with each other. In the above-mentioned embodiment, each light-emitting element array is adjusted, but multiple wafers can also be gathered to form a single chip: the same correction is performed in the block. The use of such corrections can reduce the cost of the project and data acquisition. It's hard In addition, in the case of light emitting elements other than the self-scanning light-emitting element, the light emitting elements are driven in a time-sharing manner. By adjusting the image data and the starting timing according to the present invention, the offset in the y-axis direction can be adjusted. Next, a second embodiment of the present invention will be described with reference to the drawings. The second embodiment of the present invention is to provide a drive circuit for an optical write head. In each ^ optical element array chip, an x circuit 'for adjusting the generation timing η of the arterial wave is not needed to correct the light spot on the photosensitive drum. Offset of the secondary scanning direction. Fig. 18 shows a state in which the self-scanning light-emitting element array wafer is arranged on the optical writing head to be jagged. Determine the xy coordinate axis as shown. The X-axis direction is the alignment direction of the wafers (main scanning direction), and the y-axis direction is the direction orthogonal to the alignment direction of the wafers (sub-scanning direction). 553845 V. Description of the invention (20) Self-scanning light-emitting element array wafers Cq to C3 are provided with connecting pads 101 to 104 at both ends thereof, and 256 light-emitting elements 33 are arranged at intervals p therebetween into a linear shape. The a signal of the write signal is input to the connection pad 101, the 01 signal (the transfer clock) is input to the connection pad 102, the 02 signal (the transfer clock) is input to the connection pad 103, and the connection pad 1 is input. 〇4 source. J: Sweep? Type test optical element array wafer C. The shift of ~ c3 becomes to make the light emitting point two: the soft two interval is equal to the interval ηΛ of the light emitting element 33 in the y-axis direction, and the two ends are separated from each other, so that the two ends of the light emitting element array wafer are in the wrong tooth shape on the X axis. The adhesive was fixed on the substrate, and the Δ, Δ, and Δ were advanced during the first line time. J; = The distance in the X-axis direction between the light-emitting points at the ends of the element array wafer. Wang Bu Xing Yu P, covering multiple light-emitting elements so that the distance in the X-axis direction of the light-emitting element 33 becomes a certain value "from V &quot; two models Light-emitting element array BH Γ Γ 4 * Even as above

Cl, c3 is configured to be: 2 wide factor °: "of the light emitting element array wafer to" in the light emitting element array factor: A! = Piece 33 of the light-emitting square chip Cl, C3 becomes from: 2 becomes left to right 'When the light-emitting element array is added to the optical writing head, * ® 19 ^ ^ ^ w / 〇Λ Λp' ^ ^ ^ ^ In the drawing, the paper is also covered; the reverse is there; Hi is not parallel to the x-axis direction because the rate and Odd numbered wafers 2 = Number of lines drawn by the numbered wafers The slopes of the lines drawn by the films are different because of the light emitting element (21) '--------- 553845

The direction of Hi is in the even-numbered wafer # odd-numbered crystal. The figure is reversed. If the stage of the second wave is poor, you can transfer each of the lines drawn by the even-numbered wafer upstream to the downstream to connect the odd-numbered wafer. ^ Of the image ^ The image data delay paper sent to the odd-numbered wafer is transferred between the M portions τ. This operation is performed by the circuit 2 0 shown in Fig. 20. Fig. 20 is a circuit diagram for showing The optical write driving circuit according to the second embodiment of the present invention. The self-scanning light-emitting element array wafers c ◦ to c “the non-columns are shifted in the y-axis direction between the wafers according to the tooth shape, and n = 2. Scan the connection pads of the light-emitting element array wafers Cq ~ Cs by yourself. 〇2, via the buffer 76, the necessary signal from the terminal 83 of the connector 79 is input. 丄 The connection pad 103 is input through the buffer 77. &Quot; Required 2 from Terminal 82. In addition, the current limiter J for limiting the current of the 0 1 signal and the 0 2 signal is incorporated in the self-scanning light-emitting element array chip. In addition, power is supplied from the terminal 81 to the connection pad 104. The 01 signal of terminal 83 and the 02 signal of terminal 82 are sent to and circuit 2. The AND circuit 78 obtains a logical product of the 0 1 signal and the 0 2 signal, and outputs the obtained signal to the terminal 41 of the counter 4 0. The counter 40 counts the number of drops of the signal output from the AND circuit 78 at the terminal 41, and outputs a count value from the terminal 42. The count value is used to specify the address of the RAM50 of the memory used to store the image data. The memory capacity of RAM50 here is the number of odd-numbered chips N (3 in FIG. 20) x number of light emitting points per chip κ (256 in FIG. 20) X offset η (in the figure 20 is the size of 2). RAM50 has a data bus with N amplitude

C: \ 2D-00DE \ 92-01 \ 91125020.ptd Page 24 553845 V. Description of the invention (22) In Figure 20, the reset of the counter 4 0 is not shown, but it can also be reset automatically when the power is turned on. Reset, or reset signal from external input. The counter 40 here can count 5 1 2 of the number of bits per chip, and a 9-bit ripple counter can be used. On the connection of even-numbered light-emitting element array chips, the logic obtained by ANd gate 64 through the signal of terminal 86 and the light-emitting sequence signal of terminal A at terminal 90 through buffer 73 and current limiting resistor 91 is input. product. The logic obtained by the AND gate 66 of the light-emitting element array chip C4 is connected to the pad 1 〇1 through the buffer γ 5 and the current limit resistor 95 and the A light-emitting timing signal of the terminal 84 and the A light-emitting timing signal of the terminal 90 product. On the other hand, the connecting pad 1 0 1 of the odd-numbered light-emitting element array chip q is input with the signal output from the terminal 45 of the RAM 50 and the terminal 90 through the buffer 70 and the current limiting resistor 92. The logic output of the 0m light-emitting timing signal is obtained at the AND gate 67. In addition, at terminal 45 of RAM 50, a signal of terminals 8 7 to 4 is input via a 3-state bus buffer 57. On the connection pad 101 of the light-emitting element array chip C3, via the buffer 71 and the current limiting resistor 94, input signals from the terminal 44 of the RAM 50 and the &amp; light-emitting timing signals of the terminal 90 are obtained at the AND gate 68. ^ Product. In addition, the A signal of the terminal 88 is input to the terminal 44 of the RAM 50 via the 3-state bus 1. f cage balance 卯 58 is connected to the light-emitting element array chip C: 5 at the connection pad 101, and via the current limiting resistor 96, the terminal 50: the RAM signal and the light-emitting timing signal from the terminal 90 are input. The product of the outputs at AND idled. In addition, at the terminal 43 of the coffee, the three-state confluence = the red logic

V. Description of the invention (23) Input terminal 89 之 0 芦 # v Terminal 46 is the level of the stomach. The energy of the stomach can be adjusted according to the sub-quasi-level. In ί! 2 =, the writing trigger pulse becomes "immediately applied to For the address specified by the address value of the terminal 4fl, write j and determine the state of the image data of the oblique horse from 43 to 45 in order to align the terminal 4: From the conversion terminal 46 before: the child 48 Insert the delay gate ⑸. E σ is written to trigger the pulse wave, so ~ 4 is another 5: ^: 立 = change the state of the second son 4 &quot; L level, from terminal 43 like lean material. In the change of the guard d β a &gt; thousand 4 7) The signal of the map of the address of the heart. That is, r has the logical product of the plus 01 signal and the 0 2 signal. It becomes the level. The signals are the control signals of the case 59 of the level. That is, the bus buffer 57 ~ is used as the buffer bus 57 ~, and the image data of the terminals "~ 89 are used as buffers, and the signals of the terminals 87 ~ 89 are separated using the fixed H '. The operation of the drive circuit of the write head first. The number of the first ‘Mini :::’ line 1 data in the main scanning direction of Xin Cheng dr. 2 consecutive numbers ’is shown in the 83 and 82 signal of the j line of the i line. This count value is output as t-bit ΐ value to terminal 47 of RAM50, which is used to specify the column address of RAM50. In addition, the 83 AND 82 signal is input to the RAM50 for writing / reading conversion. Page 26 C: \ 2D-C0DE \ 92-0l \ 91125020.ptd 553845 V. Description of the invention (24) Terminal 46, in position Write on time and read on L. f First, at time 0 ', all the contents of the memory of the RAM50 are made.> Second, at time t1, the readout of the RAM50 is ordered because the 83 AND 82 signal is at the dagger level. The image data read from the terminal 45 becomes the value of the address 00. At time t2, since the light emitting timing signal J of the terminal 90 is at the Η level ', the light emitting element array μ is crystallized. A signal of the terminal 86 is input to the connection pad ι, and a signal of the terminal 45 is input to the connection pad 101 of the light emitting element array chip. Then, at the time when the 0 1 signal and the 0 2 signal become the 11 level at the same time t3: The 83 AND 82 signal becomes the η level, and the 83 AND 82 signal excites the 3-state sink buffer 60, and the picture from the terminal 87 Image data is applied to terminal 45 of ram50. While the writing is at the H level, the delay signal 83 AND 82 is slightly delayed by the delay gate 63, and the delayed signal is input to the terminal 48 'image data from the terminal 87, and the writer is connected to the terminal 45 The address specified by the terminal 47 of the RAM 50 is 00 (h). Next, at time t4, the 83 AND 82 signal becomes u, and the counter 40 that counts down the number of beans becomes 0 01 (h). ', Hereinafter, repeat in the same way, as shown in Figure 2 丨, write the data π 1 ο ο ο 1 ο ο 11 ο 〇1 · · · · "in order to write to RAM5 〇. * Write to memory After watching this-coherent action Risi, read out the image material on the RAM, after making the image data of the light-emitting element array wafer, the same value as the counter 40, and repeatedly write new data at the same address. In the case where the offset in the y-axis direction of the light emitting point is the n-line part, the counter η is reset to the angle η X (the number of light-emitting points per chip), and after the η line At the time

553845 5 Invention Description (25) sequence, read the previously written data. Fig. 22 shows a timing chart of the third line. Read the data π 1 0 0 0 1 0 0 1 1 0 0 1 ____ ”written in FIG. 21 in order. The result is shown in FIG. 23. One line can be drawn before and after the light emitting point lines are connected. In the above-mentioned embodiment, the situation described is that the number of light-emitting elements that are transferred with image data during the line time is equal to the number of light-emitting elements that are loaded on a chip, but it is not limited to this method. The number of light-emitting elements to which image data is transferred during one line time can be made into one group, and a plurality of them can be gathered together on one wafer. The third embodiment of the present invention will be described with reference to the drawings. The third embodiment of the present invention provides a method for driving an optical write head. It is not necessary to set a circuit in every two T light-emitting element array wafers to adjust the timing of generating arterial waves, and it can correct the sub-scanning of the light spots on the photosensitive drum. The direction is shifted. 2 indicates that the self-scanning light-emitting element array wafer is arranged in a state in which the optical writing head is sawn. In FIG. 24, the x-axis direction is the alignment direction of the wafer (the main drawing direction) and the y-axis. Direction is with crystal The arrangement direction of the slices is orthogonal to the direction (sub-scanning direction). The self-scanning light-emitting element array crystal Η Γ. 甘 q! * 甘 „I 什 早 夕 J 日 日 片 C0 ~ C3 are provided with connecting linings at both ends 31. A light-emitting element 33 is provided therebetween in a linear shape. In addition, the light-emitting element array wafer C ~ ri, ..., and Dingshi array # &gt; m π &amp; 3 are arranged in a zigzag manner in the axial direction, so that both ends of the array aa sheet are overlapped, and shifted into a row of light emitting points. "It moves in the y direction! Several times η 'of the photosensitive drum in line time is fixed on the substrate with an adhesive. In this way, it is separated by ^

^ 53845

Description of the Invention (26) A plurality of self-scanning light-emitting element arrays—the interval in the X-axis direction is constant. In the case of the King of the Sun, the light-emitting element 33 is assembled into the light as described above in the light-emitting element array wafer: When each self-scanning type is set, each self-scanning type light-emitting element is arranged in a zigzag arrangement. The interval d of the center line is an integral multiple of the distance between the light emitting point rows of the wafers moving in the y-axis direction. The image data on the photoreceptor drums between 1, 4 and 4 are used as the image data corresponding to the prepared memory array chip as the image data. In the case of η, the (pi value of integer multiples (, = image corresponding to ㈣, the configuration of the aggregate is)]: when the array chip with an even number drives the light-emitting element array chip, it follows the sequence: Read the data on the memory one by one. When the configuration of Euro L is configured in this way, only the flat gland owes "When the image material is unfolded on the memory, it is arranged on the software and the bed A The female μ 4, the initial sequence is the same on each array chip, and can be shared. That is, from the image recording cry 啐 ψ P1 # A .. The material is transferred to the corresponding hair opening on the wafer &gt; 蛀 &amp; 卞n The time sequence of Zhengzhu®1 elephant shell ~ 7,7L pieces, no special way is required. 0 This embodiment i; i recalls the image data from the image memory, and adjusts the correspondence of the image data to the array chip. The timing of the light-emitting element is not ^ the offset on the photoreceptor drum = the direction of the optical axis of the light spot is changed, but the image data The configuration of the material memory is configured according to the distance between the array chips, so that the offset in the y-axis direction is eliminated.

553845

V. Description of the Invention (27) In the case where the description of the driving method of the optical write head of the third embodiment will be described, the use of 1 200dpi (arrangement of light-emitting elements at a pitch of 12,000 elements at a time) The scanning light-emitting element array wafer is used to obtain a hard copy of 1200 dpi in the main scanning direction of 120 dpix and the sub-scanning direction. Since the field scan direction is 1 20 Odpi ′, the distance on the photosensitive drum moved 1 line time is 2 1 · 1 6 # m. The interval between the center lines of the light emitting point rows of each wafer arranged in a zigzag manner becomes an integer multiple of 2 1 · 1 6 // m, the center of the light emitting point rows

The line interval becomes 6 3 · 4 8 / zm when η = 3 and 84 · 64 / zm when η = 4 〇 The case described here is the light emitting point of each wafer arranged in a sawtooth line. The centerline interval is 3 times 21 · 1 6 // m (n = 3). In FIG. 24, the center line of the light emitting point row of the wafer ci is arranged to be a connection line to the center of the light emitting point row of the wafer q, and is deviated from 63. 48 // m in the y-axis direction. On the memory used to store the image data transferred to the chips CQ ~ C3,

When the number of pixels in the 1 line is 2 56 pixels, the image data of the chip q and C3 are arranged at 256 X 3 = 768 pixel portions, and the shifted arrangement is in the memory. The process of shifting the image data and arranging the image data in the memory is performed in software when the image data is expanded on the memory. Fig. 25 is an image diagram of the memory when the image data is not shifted and is stored in the memory. One line is composed of 256 pixel data. CQ -1 represents the image data on the first line memory corresponding to the wafer CG. Figure 26 is the record when the image data is stored in the memory after being shifted.

C: \ 2D-CODE \ 92-01 \ 91125020.ptd Page 30 553845 5. Description of the invention (28) __ Image of the memory device. When the data that has not been shifted by the memory becomes in an indefinite state, the address of the output image data will be reduced. Because of ⑶, it is also possible to initialize the memory before writing the image quality address 'into the memory' to write the bitmap data used to indicate that there is no image written data, in addition to writing the images corresponding to the pictures C1, c3 Information, the effect of crying in memory 1. The position shifted from the crystal is 256 X 3 = 768 pixels. Figure 25: Driver chip C. ~. At 3 o'clock, according to the physical arrangement sequence shown in Fig. 26, the images are sequentially recalled from the memory: # 思 'to the chip CG ~ C3 for driving. At this time, the read-out signals are: clock signals of the shifting portion of the tracing-type light-emitting element or clock-scanning signals of the clock 1 for self-lamp. Fig. 27A shows an image in which the image data is not shifted on the memory. At the festival, weep p, s Η Γ η The monthly status is lost ^ ί ^ The image data of the previous day's film Cl, G is not shifted, although it is the case of driving the chips Co ~ C3 for image output As shown in FIG. 27A, the stage difference between the light-emitting element array wafers appears in the image, so the image quality is lowered. FIG. 27B shows the case where the image data is shifted. The image data of the wafer qQ is shifted in the memory state, and when the wafers Cq ~ C3 are driven for image output, as shown in FIG. 27B, the image does not have a step difference, and the original hope can be output. Of images. η 丨 Moon Heart Town, as shown in the figure, there will be a step difference in the image, but by moving the memory configuration of the image data corresponding to the chip CQ, (: 2 through the other 2, the optical write head can also be made The assembly direction or image output direction is opposite to the above-mentioned embodiment. When the distance between the light-emitting elements arranged in a zigzag pattern is 2, as shown in FIG. 28A, a step difference may occur in the image. Cn, C. Be cautious after doing the drawing

C: \ 2D-OODE \ 92-03 \ 91125020.ptd Page 31 553845 V. Description of the invention (29) Bits' As shown in Figure 2 8 B, it can prevent the occurrence of step difference. In addition, the interval i between the center lines of the light-emitting point rows of the light-emitting element array wafer may be an integer multiple of the distance η on the photosensitive drum moved for 1 line of time, and preferably 11 = 1, 2, 3, 4, 5, 6 , 7,8. A fourth embodiment of the present invention will be described below with reference to the drawings. The fourth embodiment of the present invention provides a light amount correction method for the optical write head, and the light amount correction can be performed without using a special circuit. First, a first embodiment of a light amount correction method for an optical write head will be described.

Fig. 29 shows a schematic configuration of a driver circuit 17 for realizing a light amount correction method of an optical write head. The driver circuit 7 has: an image memory 9 for storing image data; a memory (for example, ROM) 2 3 for storing exposure correction lean material; a multiplier 2 5; a write signal (0 generator 3 7; controller 35 'is used to control the image memory 19, the memory 23, and the multiplier bracket, and the buffer 36 for the writing output from the writing signal generator 37 The signal is supplied to the light-emitting element L via the current-limiting resistor R !. In the above driver circuit 17, from the image memory 19, the 3-bit hue of the n-th light-emitting point of the self-scanning light-emitting element array Data 112, 111, 110 ([100], [〇11], [〇1〇], [〇〇1],

5 combinations of [00 0]) are sent to the multiplier 25. On the other hand, from the memory 23 for storing the exposure amount correction data, the exposure amount correction data of the self-scanning light-emitting element array corresponding to the light emitting point No. 11 is transmitted. In this embodiment, the calibration data is stored in the memory 23 in advance, and the calibration data should be the lowest concentration! When the color tone [001] lights up all the light-emitting points, the ON time is obtained such that the irregularity of the exposure amount is 0.5% or less.

553845

The hue data 112, ln, and 11 transmitted to the multiplier 25 and the exposure amount correction data 20 are taken as the product of the values, and are used to generate the exposure amount data 21o. For example, for example, the tone data of No. 1 in Fig. 2_9 is [〇1 丨] and the correction data is 42 (&quot; ((h) represents a hexadecimal number), so it becomes 3 (10) d), 66 (d) yd) represents a decimal number). Therefore, its product becomes 3χ 66 = 1 98. Connected to the writing signal generator 37 of the exposure amount data 21 0, according to the exposure, the data 21G adjusts the time to generate the writer signal &amp; and supplies it to the light-emitting element L via the buffer 36 to correct the light emission amount. In this way, a uniform light quantity distribution is obtained. In this embodiment, for the density of the i-th hue [〇〇1] with the lowest density, the benefit is: the correction data is obtained from the measured data. The other hue is used to generate eight integers (0 '1, 2, 3, 4 through calculation). ) Times the ON time. The correction data used here uses the lowest density. First, the hue measurement 胄, in the hard copy, the unevenness in the low density area is more significant than in the two density areas, so the conversion error in the low density area is minimized. It is also possible to obtain the effect of the present invention by using a measurement value other than the first color tone to generate correction data. In addition, in the present embodiment, the case where the color tone data is 3 bits is described ', but it is not limited to this method, and it is also possible to generate the exposure amount data 21 0 with 2 bits or 4 bits or more. In addition, the example described by the writing signal generator 37 is to adjust the ON time using the exposure amount data, but the voltage or electric power of the self-scanning light-emitting element array can also be adjusted, and the writing signal generator 37 can also adjust the time. A combination of two voltages and currents. In addition, the write signal 37 can also adjust all combinations of ON time, voltage, and current.

C: \ 2D-C0DE \ 92-01 \ 91125020.ptd Page 33 553845

5. Description of the Invention (31) The second embodiment of the light amount correction method of the optical write head will be described below.

In the first embodiment, the exposure amount data 210 is twice the color tone of the exposure amount correction data. Because the hue data is an integer, the household breeder uses the exposure amount produced to make the feed at equal intervals. This correction can be effectively performed when there is a proportional relationship between the exposure and the hard copy. Fig. 30A shows the month-to-month situation where the exposure amount is directly proportional to the image / degree. To obtain the image 丨 farming degree F, 2 f, 3 Γ, 4 Γ, the exposure can be applied e, 2e, 3e, 4e, respectively. However, in the electrophotographic method, depending on the characteristics of the photosensitive drum or the development conditions, it can be used under conditions that are not in a proportional relationship. In the imaging system with the characteristics of the s-shaped plastic as shown in Fig. 3 β, the density δ is arranged at regular intervals ρ, 2 Γ, 3 Γ4 Γ, and the exposure must be adjusted to el, e2, e3, e4. '' Among them, as shown in FIG. 31, it can also be constructed as shown in FIG. 31. For the four tones other than 0, the image density of the hard copy becomes an equal interval, which will be used to obtain the tone correction data of the exposure. The tone correction data stored in the memory 21 group is selected in advance according to the data 11, 111, and 112 in the selector 27, which is stored in the memory 21 (for example, ROM) 21 in advance. In the present embodiment, 'the lower two bits of the three-bit data are allocated to

The hue data 'assigns the most significant bit 11 2 to the ⑽ / off data. Taking FIG. 31 as an example, one example is when the tone correction data stored in the memory 2 is 56 (h), 66 (h), 76 (h), and CD (h), if the tone data ui, If 11 is [0 0], select 5 6 (h). If [0 1], select 6 6 (h). If [j 〇], select 76 (h). If [11], select cD. (h). When the on / off data 112 is input to the nose device 25 ′ or the data 112 is [0], the exposure amount data ^ 1〇 also becomes [0]. After the exposure data 210 is generated, the operation is the same as that of the first embodiment.

C: \ 2D-C0DE \ 92-01 \ 91125020.ptd page 34 553845 5. Description of the invention (32) The embodiments are the same. In this embodiment, the 3 bits of data are divided into 4 plates, and the knife becomes the lower 2 bits of color information.

Material, and the highest bit of 〇 N / 〇 F F Shenzu j Q ^ 0 Beicai 4 ′ but the circuit can also be simplified, with 2 bit signal control to select more points.

Ifnβ is a data selector. But: Beco's method of addition is not limited to the method of this embodiment *, but it can also be distributed in any way. In addition, 'selector 27' can also be selected. When the bit is 0, the pendulum ratio -7 υ is selected, and the [0 0 (h)] data prepared in advance on the memory 21 is selected. In addition, You can also try again without setting up the data in advance, and set it to a fixed value of 0. Next, a third embodiment of the light amount correction method of the optical write head will be described. In the first and second embodiments, the product of several calculations is obtained by using the hue data value or the hue-corrected hue correction value and the correction data of each light emitting point 200. However, the calculation of the product is not performed in blocks, so the problem of processing delay is combined. It is said that the third embodiment is to cope with such a problem. FIG. 32 shows the structure of the driver circuit. In this embodiment, instead of the product obtained by the multiplier, the unevenness between the light spots is corrected to write the signal. (The lighting time of ^ is adjusted by a. On the other hand, the hue is adjusted by the DA converter 29 to adjust the driving voltage of the generator. In this case, the timing of the light emitting point is controlled by the gate of the field ^ ^ body 34. The voltage level is controlled, and the voltage applied to the light-emitting element is determined by the drain voltage of the effective transistor 34. By independently controlling the two ^ factors, the amount of light can be adjusted by the product of the two. In addition, ' Here, the field effect transistor is used to adjust the voltage value and time, but you can also use analog switches with control terminals, such as yuandu juice, or adjust

553845

Current and ON time. The driver circuit of FIG. 32 is further described below. The drive 17 has: an image memory 19 for storing image data; a memory such as ROM) 23 for storing exposure correction data; a data selection memory (for example, ROM) 2l for Stores tone correction data; write signal (^) generator 37; controller 35 for controlling image memory 19 / ROM21, and data selector 27; DA converter 29; and field effect transistor 34, according to from The write signal output from the write signal generator 37 is connected / disconnected to the μ converter 29. The source of the field effect transistor supplies a current to the light-emitting element L via a current limiting resistor R !. The DA converter 29 uses the tone correction data 22 selected from the tone data 110, 111, and 112 to determine the voltage value. In the driver circuit 17 described above, from the image memory 19, the 3-bit tone data 11 0, 111, 11 2 of the self-scanning light-emitting element array at the n-th light emitting point is sent to the data selector. 27. Use this data to select the 4 kinds of tone correction data of the memory 21 or non-lighting 0 data as the exposure data (driving voltage data) 2 2 0 and send it to the D A converter 2 9 to determine The drain voltage of the field effect transistor 34. In this embodiment, for the data of 00 (10, 76 (11), 66 (} 1), 56 (11), the output voltage of the DA converter 29 is 5.0V, 2.9V, 2.5V, respectively. Corresponding to 2.1 V. On the other hand, the exposure amount correction data of the self-scanning light-emitting element array corresponding to the n-th light-emitting point is transmitted from the memory 23. In this embodiment, the memory 23 stores in advance Correction data corresponding to the obtained ON time, so that the maximum voltage value of all light-emitting points is the exposure amount at 5 · 0V

553845 V. The irregularity of invention description (34) becomes 0.5% or less. After receiving the exposure amount data 2 1 0, the write signal generator 37 is used to generate the write signal 01 whose ON time is adjusted according to the exposure amount data 210, and is used to control the field effect transistor 34 to determine lighting. time. In this way, a uniform light distribution can be obtained. In addition, in this embodiment, the tone signal is used to adjust the voltage and the exposure amount correction data is used to adjust the lighting time. However, the opposite can also be done by using the tone signal to adjust the lighting time and the exposure amount to adjust the voltage. Next, a fourth embodiment of the light amount correction method of the optical write head will be described. In the third embodiment, in order to avoid the calculation of the multiplication, two independent adjustment methods can be used together to obtain the same effect as the multiplication. The fourth embodiment shows another example of avoiding multiplication calculation. Its structure is shown in FIG. 33. As shown in FIG. 33, in order to avoid the multiplication calculation, the correction data is stored in a memory (for example, ROM) 2 3 as a pre-calculated result of each hue. In this way, calculus can be ruled out as a high-speed process. In addition, since data of each tone of each bit is stored, fine correction can be performed for each bit. For example, when the minimum tone 1 is used, the light intensity of the same image density is changed in the same proportion. When the minimum tone 4 is used, the image density may be shifted. Fig. 34 shows an example of the relationship between the exposure amount and the image density related to two light emitting points (in this figure, the image density 1 corresponds to the fourth color tone). At an image density of 0.25 equivalent to the minimum tone, it has approximately the same exposure, but in order to obtain an image density of 1 equivalent to the fourth tone, the exposure of the dotted line is smaller than that of the solid line. Degree of 30%. That is, through the light emitting point

C: \ 2D-C0DE \ 92-01 \ 91125020.ptd Page 37 553845 V. Description of the invention (35) ------------ Stick J? Becomes different, and the fine focus state becomes different The shape of the knife cloth in the light of photo 5 becomes different. Among them, f 'is used to make correction data. Not only the amount of light is measured, but also the area of a light set above a certain threshold is measured. Calibration data calculation. In the example of Fig. 34, s is used to indicate the current flowing in the sun guard equivalent to the fourth hue, the area of 1/2 of the peak value of the typical light distribution of the wafer, and a is used to indicate that the light purchase measurement is similar. The correction of hue makes us a certain value. In addition, for the 3rd, 2nd, and 1th tones, use the curve of Figure 34:? Calculate Exposure 1 using the proportional relationship between the 2 curves and the exposure amount at the 4th tone. For example, the exposure of the fourth hue of a certain luminous point is 0.9%. In the two curves in Fig. 34, because they are approximately ^ 〇 and 〇 7, respectively, the two curves are divided into 1: 2 The curve (in the 4th tone, the intersection with the internal curve, the exposure is 0.9), and the 3rd, 2nd, and ith tones are calculated. With this correction, uneven image density caused by offset can be eliminated. In this embodiment, the correction coefficient is determined according to the amount of light and the cross-sectional area of a certain light intensity, but it is not limited to these two parameters. Various correction methods can also be applied to the present invention. [Industrial Applicability] In the present invention, for each light emitting element array wafer, the generation timing of the arterial wave supplied to the arterial wave line is adjusted according to the shift amount of the assembly position of each wafer. When the assembling accuracy of the sub-scanning direction of the wafer is relaxed, the offset of the sub-scanning direction of the light spot line on the photosensitive drum can also be corrected with high precision during image output.

C: \ 2D-00DE \ 92-01 \ 91125020.ptd page 38 553845 Description of the invention (36) In addition, the present invention is an optical write head, which arranges the light-emitting element array wafers into a zigzag pattern, and the zigzag pattern is arranged alternately. The corresponding image data of one of the light-emitting element array wafers is held in the memory, and after a time equivalent to the offset amount of the assembly position of the chip, the image '= data' is read from the memory and output to the light-emitting element. Array wafer, so the offset of the sub-scanning direction of the light spot rows on the photosensitive drum can be corrected. In addition, the "optical writing head of the present invention" arranges the light-emitting element array wafers into a zigzag pattern, wherein the image data is shifted on § Ji Yizhai according to the offset amount of the assembly position of the wafers, and is used to The image data is recalled in the image memory. No special circuit is required to adjust the corresponding light-emitting element that transfers the image data to the wafer, and the offset of the sub-scanning direction of the light spot rows on the photosensitive drum can be corrected. . In addition, the present invention is a general optical writing head, which is used to represent image data of bit data, in which a group of correction data is measured, and other corrections are based on the determined color tone. Calculated from one of the above sets of calibration data. These groups of correction values are only configured in the memory. Only selecting this group can indicate the hue, and it can provide a light output with a uniform light amount after being corrected. Explanation of component numbers ~. 5 17 23 25 27 Self-scanning light-emitting element array chip Driver circuit Memory Multiplier Data selector

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V. Description of the invention (37) 29 DA converter 33 Light-emitting element 34 Field effect transistor 37 Write signal generator 49 Counter 50 RAM 53-0 ~ 53-3 Memory 65 ~ 67 AND gate 70, 74, 76, 77 Buffer 78 AND circuit 79 Connectors 81 to 89 Terminals 91, 92 '93, 94, 95 Current limit resistors 101 to 104 Link pads 110, 111, 112 Tone information 200 Exposure correction data C: \ 2D-00DE \ 92-01 \ 91125020.ptd Page 40 553845 Brief description of the drawings — Figure 1 shows the principle of an optical printer with an optical write head. Fig. 2 shows the structure of an optical write head. Figure 3 is the equivalent of the basic structure of a self-scanning light-emitting element array chip. Figure 4 shows an arterial wave of 0 s and a clock of 0 0 0. The write signal becomes sawtooth to indicate the driver circuit and the array of light-emitting element array chips. Fig. 7A shows j pixels divided into 16 points x 16 points. FIG. 7B shows one pixel subdivided into 8 points x 8 points. Fig. 8 shows a state in which a self-scanning-type chromatographic array of A + ^ &amp; array chips is arranged on the optical write head and becomes substantially linear. Figure: The image data in Table 2 is not shifted on the memory. When the line is drawn, the image is not shifted. It is arranged in the memory and the image map. FIG. 11 shows an image diagram of a memory in which image data is shifted. Figure 5 shows the state of the pulse wave waveform. Fig. 5 shows a state where the light-emitting element array wafers are arranged in a light state. 、、 When the timing device is used, the image data is shifted on the record. When the line is subtracted, FIG. 13 is a circuit configuration diagram of a device that generates a starting sequence. FIG. 14 is a timing chart for explaining the generating sequence. Of the device.

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The array is arranged on the optical writing head to form a state in which the self-scanning light-emitting element is in the shape of a tine. Figure when shifting and drawing a straight line Figure when shifting and drawing a straight line Figure 16 shows an example where the image data looks different on the memory. Fig. 17 shows an example of the image data on the memory. Fig. 18 shows a state where the self-scanning light-emitting element array is jagged. No. Imaginary Writer Figure 19 shows the image drawn when linear data is directly applied to the optical write head. Fig. 20 shows the drive of the optical write head according to the second embodiment of the present invention. Fig. 21 is a timing chart for explaining the movement of the drive circuit of the optical write head. Fig. 22 is a timing chart for explaining the movement of the drive circuit of the optical write head. Fig. 23 shows an image drawn by the optical write head. . Fig. 24 shows a state where the light emitting element array wafers are arranged on the optical write head. x is sawtooth Figure 25 shows an example of the memory configuration stored in the memory when the image data is not shifted. ° Thinking device Figure 26 is an image diagram showing an example of the memory configuration when the image data can be stored in the memory when it is shifted. ~ 'Is shown in FIG. 2A. The image data is not shifted on the memory. Child's turn out Figure 27B shows the image when the image data is shifted on the memory. Turn out

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553845 Brief description of drawings Figure 2 8 A shows the state where a step difference occurs in the image. Fig. 28B shows another example of the memory configuration of the image data. Fig. 29 shows a schematic structure of a driver circuit for realizing the light amount correction method according to the fourth embodiment. Fig. 3A shows the relationship between the exposure amount and the image density. FIG. 30B shows the relationship between the exposure amount and the image density. Fig. 31 shows a schematic structure of another driver circuit for realizing the light amount correction method. Fig. 32 shows a schematic structure of another driver circuit for realizing the light amount correction method. Fig. 3 shows a schematic configuration of another driver circuit for realizing the light amount correction method. Figure 34 shows the relationship between exposure and image density.

C: \ 2D-CODE \ 92-01 \ 91125020.ptd page 43

Claims (1)

553845 6. Scope of patent application1. A method for driving an optical write head, a wafer, a plurality of light emitting elements are arranged in a shape of a platoon and driven by the optical element array%, and the characteristic is that the steps included are: Perform the sub-adjustment step 'Using the position offset of the projection in order to adjust the timing of the initial light emitting point in the sub-scanning direction; the most light of the temple array ~ the first grain array chip light: light each according to the above timing Light-emitting element array wafer array 2 crystals Γ Reset ^ Driven when the write head is arrayed with light-emitting element arrays, 1 characteristic line shape 'multiple adjustment steps for it' is used to adjust the position shift amount projected on the photosensitive drum for adjustment Light up each light-emitting element: the timing of the light-emitting points at the beginning of the drawing direction; and the most light-emitting step of Mao Xianfan's array wafers, according to the time of the above light-emitting element array wafers; the sequence of borrowing data is transferred to the initial light-emitting of each wafer point. Each light-emitting element array 3. The driving method of the light-emitting element array crystals 1 and 2 as described above in the scope of application for patents 1 or 2, wherein straight lines are arranged. S is assembled into a roughly array chip along 1 or 2 rows: will be configured;, :: $ Assemble the light-emitting element array driven by each light-emitting element in the optical write head ^ Χ Χ "Several pieces are divided into a plurality of rows and divided into Time element array chip :: ί 'Each light-emitting element array arranged in a dentate shape, so that the above light-emitting arrangement direction is orthogonal to the direction of the above page 44 C: \ 2D-CODE \ 92-0l \ 91125020.ptd 553845 Application for patent scope The interval between the light-emitting element rows of the chip is an integer multiple of the distance; it is characterized by the included steps / the photosensitivity adjustment steps, using Huma — * / step: The timing of the light emitting points in the sub-scanning direction at the beginning of the light dot row; and the most common array chip of each rabbit, according to the above timing, adjust the image data and # light emitting element array chips. Gubei is transferred to the initial light emitting point of each chip. If the light emitting element array is the second in the scope of the patent application, it will be transferred to each light emitting element. Configuration order, which The bit is used according to the physical material to # j T + the timing of reading the image data chip from the above memory. The image Beco transfers to each light-emitting element array The drive method of the light write head is arranged to gather on the prepared memory for image use and shift it. / The address where the image data is not written due to the shift. D. / Figure 7 · The method of driving the optical write head in item 6 of the patent scope of Rushen Eye, each wafer, or multiple wafers gathered to form a block offset of each block In the memory device, the position shift amount memorized by the above memory device is used to generate the sequence generated by the above-mentioned sequence; light up the above initial light-emitting point. Use the wood point 8 Drive method of the light write head, wherein 553845 VI. In the scope of patent application, the timing of the initial luminous point is synchronized with the timing of transferring image data to each κ light element array wafer on each wafer, or each of multiple wafers gathered into one. X 9 · If the method of driving the optical write head in item 8 of the scope of the patent application, i ί ί Data is shifted and arranged in the above memory The processing is to expand the image on the memory, Software. … 1 0 · If the method for driving the optical write head according to item 9 of the scope of patent application, the light emitting 70, the array wafer is a self-scanning light emitting element array wafer. Column 1 is a driving circuit of a light-skinned Λ head. The light-emitting element array is assembled on the optical writing head: the column array is arranged in a zigzag pattern, so that the above two light-emitting element arrays are orthogonal to each other. Each light-emitting element array crystal = = an integer multiple of the distance on the moving M drum; it is characterized by a memory with a capacity that is used to maintain the capacity of the image data corresponding to the array chip. The value of the above integer multiple) χ (the number of light-emitting elements at 丨 line time) / 2 '] the value of the transfer image data; and a material transfer device that reads the data from the memory and transfers it to Light-emitting element array wafer. , /, As the image 1 2 · If the light of the 11th scope of the patent application of the Qing Dynasty writes M the cautionary stove of the commandment, the driving circuit of the strong and strong class spear shell, and the shell of the bean is conveyed The device, from the moment it was first, was inserted into the above-mentioned memory by Bayer Ye. Page 46 C: \ 2D-CODE \ 92-Ol \ 91125020.ptd 553845 6. The scope of patent application (integer multiples of the above) After the value) X (1-line time), an odd-numbered light-emitting element array chip is read from the memory. As an image material, it is forwarded to the drive circuit of a kind of optical write head. A row of wafers will be arranged with a plurality of light-emitting element light-emitting element array wafers arranged in a zigzag pattern, so that: Each ρ in the orthogonal direction of the element arrangement direction is described in the question of the Maoxian element array wafer &lt; each light-emitting element Chen Yue is a car on a photosensitive drum that moves for 1 line time: the interval between the films is prepared ： P &lt; Positive multiples, which is characterized by a memory, which has the capacity to keep the image corresponding to the number of pieces of sleep. The capacity of the data is greater than the value; the reading in the optical device &quot; material '... like the capital 1 4 · If the drive circuit of the optical write head of the 13th scope of the patent application, where The above-mentioned data transfer device reads data from the above-mentioned memory after the time when the initial data is written to the above-mentioned memory, ^ (the integer multiple of the above value) X (1-line time) '^ after', The image data is transferred to the even-numbered light-emitting element array wafer. is · If the drive circuit of the optical write head of the 12th or 14th of the scope of the patent application, from the moment when the initial data is written to the above memory, Sixth, the value of the integer multiple of the scope of the patent application) x (1 line time) J :: The data read from the above memory means that there is no image written 1 * ^ 6 'Ru Yishen:-Patent scope The driving circuit of the optical writing head of the 15th item, of which 70 pieces of array chips are self-scanning light-emitting element array crystals, such as the driving circuit of the optical writing head of the 16th patent application. And successively read out the shift pulse signals of the trace-type light-emitting element array on the memory. Use custom knowledge】 Item 9 · The light type ^ printing machine, which is characterized by borrowing the patent scope of the patent No. 20 · —The drive square array of light write heads In the 7b write head, assemble each light-emitting element # 瞌 ^ 日 t! / A plurality of light-emitting array chips with a plurality of light-emitting elements in a row shape are arranged in a dentate shape, so that the center line of the light-emitting element row is ^^ The luminous point of the array chip is an integral multiple of the distance on the photosensitive drum that moves for 1 line of time. It is characterized by the following steps: from the disposing step, the number of light emitting elements ^ value) X (in the time of 1 line) The value of the image data transmitted during the period is the image data corresponding to the even-numbered light-emitting element array a. The image data corresponding to the odd-numbered light-emitting element array s ^, and the image data corresponding to the J-day film on the morning and evening are gathered. 6. The scope of the patent application is for the image data device; and the prepared memory device is shifted and arranged in the memory transfer step. According to the physical description, the maps on the memory are described in "order" and sequentially. Read the element array wafer. The data is transferred to the driving method of each light-emitting type optical write head. * Pieces of array chips are arranged with a plurality of 7 ^ write masters to assemble each light-emitting element array chip into a mine record, so that: to: multiple lights.- ^ ^ The direction of each light-emitting element array is an integer multiple on H a 1; it is characterized by the included steps of the distance configuration step on the prostitute, so that (the value of the above integer multiple) x (in 丨Number of light-emitting elements in line time) The image data corresponding to the wafer that transfers the image material between J, and the corresponding image data are gathered and arranged in the memory value and the odd-numbered light-emitting element array pair. The even-numbered light-emitting element array chip is read on the memory prepared for image data; and the conversion step, according to the physical memory arrangement order, sequentially read out the image data on the memory, Transfer the image data to: the element array chip. Ά 22. The method of driving the optical write head according to the scope of patent application No. 20 or 21, wherein when the image data is configured to be collected in the image application Ji Yi is the preparation and displacing the time, since the shifted image data in the unwritten C: \ 2D-CODE \ 92-01 \ 91125020.ptd Page 49 553845 Patent application scope shifts the image data ": Wai ^ The image data is expanded in the memory: time setting; the processing of the device is in the picture sf 23 ^ ^ ^ ^ t. The element array wafer is a self-scanning light-emitting element array crystal-tracing light-emitting element ":: =: timing, using the clock signal of the self-scanning dry force shift. 2 6 · —A kind of scanning light-emitting element array n of a light writing head is provided with self-image data in the light writing head ', which is used to produce 4 light-emitting elements that should be formed based on continuous tone data = Output to the above-mentioned self-scanning and holding steps, and find them in advance; the: rm steps include: the root use obtaining step, which sequentially selects and holds the two shells; according to the above-mentioned light amount being selected; the light holding amount correction data to obtain the exposure Volume data; t-color data materials described in t: 敕 m The above-mentioned exposure volume data is composed of self-scanning light-emitting elements of the image light dots written in 1 ^ · ^. The method of correcting the light amount of the optical write head in the 26th item of the Λ Lee range includes the following two steps: the light amount correction data of 3 and the step of maintaining the light amount include a claim step for measuring each of the self-scanning light-emitting element arrays described above. C: \ 2D-C0DE \ 92-01 \ 91125020.ptd Page 50 553845 VI. The light of the luminous point of the patent application is out. ^ The hue is used to obtain the light quantity data obtained by a series of I x. Light quantity correction data. Pre-V; held at each j, the amount of calibration data and the steps of holding are used, including: Hi-point measurement of the above-mentioned self-scanning light-emitting element array consecutive light calibration = number, for any- The color tone is calculated and calculated. The light amount correction data of one group of the light amount of the light amount is calculated based on the light amount correction method of the optical write head of the 9th tone in the 2nd tone of the patent application. Luminescence element: array 歹; The step of f input signal is to adjust the ON time of the above write signal to each light emitting point of the above self-scanning type 00. Second, if the light amount correction method of the optical write head of the scope of the patent application is No. 26, the step of adjusting the write signal is to adjust the voltage of the write signal to each light emitting point of the upper light protection two array. 4 The light amount correction method of the optical write head in the 26th aspect of the patent, wherein the step of grading the writing signal is to adjust the electricity of the writing signal to each light emitting point of the glazing element array; The light amount correction method of the optical write head of the 26th aspect of the patent, the above-mentioned writing signal step is to adjust the ON time, lightning level and current of the above-mentioned writing signal to each of the self-scanning-type hair-emitting points of the train. A combination of at least any two of the levels. "5 &quot; C: \ 2D-CODE \ 92-Ol \ 91125020.ptd Page 51 553845 Patent application scope 33. If you apply for the above-mentioned exposure data after applying the light in the patent scope, use the light quantity correction method, the value of the hue data. Multiplication result. Correct the data value with the quantity and 34. If you apply for the light in the 26th scope of the patent application, you can get the first correction method of the umbrella e ~ horseman's method, and use the light quantity to correct the data value according to the quantity data step. 3 The selected hue Correct the phase of the data values ... JL φ. I is called the light amount correction method of the optical write head of the patent No. 26 item ’Yaba's steps of paying the above exposure amount data and selecting the light amount correction data according to the hue data. Basin 36 · The light amount correction method of the optical write head according to item 26 of the patent application range, wherein when the above-mentioned hue data indicates a 2η hue, the above-mentioned hue data is represented by the η + 丨 bit. 3 7 · If the light quantity correction method of the optical write head according to item 26 of the patent application range, wherein when the above-mentioned hue data represents a 2η hue, use the η +1 bit as the above-mentioned hue data, expressed in η bits Hue, using the remaining j bits to indicate on / off. 38. If the light amount correction method of the optical write head according to any one of the 26th to 37th of the scope of the patent application, the above-mentioned tone data is to divide and subdivide a pixel with at least any of vertical, horizontal and oblique In this case, the tone data of each bit. 39. The light amount correction method of the optical write head according to item 38 of the patent application scope, wherein one of the above pixels is subdivided into 8 bits x 8 bits. C: \ 2D-C0DE \ 92-01 \ 91125020.ptd