TW581999B - Method and apparatus for driving a digital display by distributing PWM pulses over time - Google Patents

Abstract

This invention provides a method and apparatus to distribute pulses of a pulse width modulated signal over a time period. When applied to a digital display, the invention provides a signal representing the digital data comprising a plurality of smaller pulses distributed over the refresh time period to drive the display element. A logic circuit is provided to generate a plurality of combinable signals so that the incoming data can be combined with the signals to determine the mix of signals generated as a final output. The individual signals are generated by identifying the lowest order active bit of a counter that is subdividing the appropriate time period into smaller time divisions and generating a pulse on one of a plurality of outputs with each unique lowest order bit identified output on a separate output and successive common lowest order bits identified generating pulses on the same output.

Description

581999

V. Description of the invention (1) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Suiji ¾ The present invention relates to a method and a device for driving a digital display by dispersing a pulse width and modulating a pulse wave in time. In particular, although not necessarily only, such methods and devices can be implemented in areas such as LEE ^ LCD screens or projectors, TV sets or other digital display screens that use digital information display screens. Inventions Recently, digital display screens have become more prominent. These come in many forms, and although the invention will generally be described with reference to LED screens, it will be readily apparent that the same considerations apply to other digital display systems. Take the LED screen as an example, which can be typically provided by a screen with multiple pixels. Each pixel may contain a plurality of different colored LED elements to provide a desired color range. Still, this can typically include red, blue, and green LED elements. In order to provide a specific color on a pixel within a set period of time, a range of colors can be provided by providing different intensities to the illumination of the red, green, and blue pieces, respectively. ▲ With the use of digital displays, the change in the intensity of # to each LED element is typically achieved by the relative percentage of time that each element is excited. These digital displays can operate at a variety of update frequencies. A typical frequency is around 60 Hz to provide a fairly continuous apparent signal to the human eye. At a frequency of 60 ^ 4, each pixel is required to display the desired color, and the appropriate energy level is provided to each LED element within 1/60 of a second. When the data is provided to the LED in digital form, and the LED is operated immediately, the change in the energy level during the update period is only updated by the update. * -------- 1T ------ --- (^ 先 间 ^ Anxiety on the back 4 坨 5 pages)

4 581999

5. Description of the invention (2

Printed on suitable parts of the Consumer Cooperatives of the Wisdom Time Production Bureau of the Ministry of Economic Affairs to illuminate the LE files, using a digital display, 7 is not bad because it provides higher or lower energy levels during the time period, The #, group power level is mentioned to illuminate the π pieces only for the percentage of the update period, and if needed, to provide the relevant percentage of the intensity of the color averaged during the period to operate the elements. It is often possible to have a non-linear response to change the current applied to these components. Therefore, it is generally more desirable to change the amount of time the component is energized rather than changing the instantaneous current supplied and maintaining it throughout the period. "Assume that the update period is the time indicated by" T ", # to illuminate the appropriate element with the appropriate part of '' T" as required to provide the intensity of each degree of each color. The simplest way to exaggerate this function is to switch the element at the beginning of the period "τ," and to energize the element at the appropriate part of the period before closing the element. For example, if you want to make color 50% The intensity of the red, then the red element can be excited for the first half of the time period "T". By changing this part of the time period "T" from the beginning of the period to provide different intensity. However, a specific vision when the system is used The effect occurs. This visual effect is referred to as, flash, ... Although the mechanism of this visual effect has not been fully understood, it is believed that the effect occurs due to the uneven distribution of energy within the "Ding" period of time. As pointed out in the previous example The 50% intensity can only be provided through the first half of the time period, τ, and the first half of the period. If the image is still, during the subsequent time period, Ding ”is similarly excited, and the average dispersion does not produce special visual distortion. However, if a moving image is projected on the screen, the paper size is in accordance with the Chinese national standard (CNy / y specification (2) 0 X 297 mm, centimeter) on the boundary of the moving image.

5. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Control of the People's Republic of China. Description of the image (3) = The intensity needs to be significantly changed during the continuous update week. Consider several items that are stimulated 50% during one cycle and 25 / in the next one. ’For the knife in the first half of the _ update period and the next update period, where? The simple implementation of the 7 ° case does not provide a flat sentence for each update period ^ However, the start and end of the update period are the same as the viewer thinks, and a slightly longer period is considered as starting from the beginning of the previous two cycles The time period "T" plus 25%, 50%, τ "and the excitation period both occur within a single h25 ,, T ,, time period. This results in an extended period even more than the first time period, τ ”Is stronger, not to mention the reduced subsequent time period“ τ ”. This visual effect of flash produces bright or dark lines that follow a moving image across the screen. Generally, two methods have been adopted to try and overcome this effect. The first method is to significantly reduce the update cycle. Although this does not prevent the effect from occurring, the significantly faster update cycle can reduce the effect that is clear to the human eye. This effect is generally clear on images that move faster across the display. The difficulty with this proposal is that the reduction in the update cycle significantly increases the processing required for the display and complicates the hardware involved and increases costs. The most economical update period is only slightly faster than the detection rate of the human eye. The jujube systems described so far use pulse width modulated "PWM" signals to provide the required strength. As mentioned above, the simplest form is to match the length of a single pulse to the desired time period, the percentage of "T". Due to the difficulty of increasing the cost of the update cycle, the flash problem is still solved. The Chinese standard has been applied to this paper standard (CNS) A4 size U10 X 297 mm) Please note the urgent matters on the back of the front 4: > u this page) · 6 581999

Use other methods to average this series of pulse waves 1 and == pulse waves that are interspersed in the time period to overcome this problem. A simple way to implement this function is to divide time periods " T ”is divided into discrete time intervals. These time periods can represent the representative period, the period of T”, the block of T ”, the representative period, τ, 25% of the block, and the period of“ D ”. Further blocks of 12.5%, etc. When these time periods are discretely dispersed within the period "T", if it is desired to provide 5/8 of the available 疋 2 intensity, then 5㈣ and 12㈣ discrete time intervals can be used to provide this value 4 times throughout the time period, τ, there are non-adjacent time intervals', but some occur on average. Typically, a 5㈣ time interval can be adjacent to one of the endpoints of the time period "τ", and a 25% interval is adjacent to the 50% interval Adjacent, 12.5 /. Interval is adjacent to 25% interval and is 50% distance away, etc. or 62.5% intensity provides two squares of time, during which the display element such as a LED element is illuminated, and by 25% during the period when the element is not excited The time intervals are separated. The number of paragraphs in which 'Ding' is distinguished during time can provide a more complex configuration. However, this type of system still provides difficulties if the intensity of the pixel approaches one of the boundaries of the discrete time period. For example, if the intensity is intended For 50%, 14 is still provided by a single pulse at one end of the time period, Ding ,. Similarly, the percentage of intensity slightly exceeding the 50% value will be set by the other end of the time period "Ding" A single 50% pulse wave and a small further pulse wave at the point are indicated. This does not affect the average of the pulse wave over all time periods "T" when the intensity value is close to the boundary of those specific time squares. This paper scale is applicable to the Chinese state ^ Standard (CNSM4 specification X 297 public reply) ^ ^ --------- line — (Please read the note on the back ^^ said: ^ this page) III · Economy '⑤ Intellectual Property Bureau employee consumer cooperative印 ΐ1, 581999 V. Description of the invention (5) In order to provide better answers, the updated product has incorporated the memory in the form of Eprom. Eprom includes a look-up table to provide the required average signal. A typical device diagram for implementing this In In the figure, in order to understand the parts of the memory in Eprom, which are typical lines of typical memory vessels, the individual lines are provided in Figure 2. Please refer to Figure 1, the simplified part of the display device to drive a single LED element 1 In general, a video signal can be received by an overall system in an analog form and converted into a digital format. In the case of a display with individual elements of red, blue and green in one pixel, the data is during the update cycle time Is expressed as the number of digits representing the intensity level of that particular LED. As shown for explanation in this simplified form, the data can be provided as a digital signal in the form of an 8-bit binary number 2. Among the binary digit signals The number of bits simply determines the number of levels of intensity for each element. An 8-bit signal provides a number of 256 discrete bins that can represent the 256 discrete intensity levels within the time period "τ" for the LED element. This can be changed when desired and please note that at least when provided to a pixelated screen with red, blue and green components, the final color of a pixel is determined by the mixing ratio of each of these three elements. Therefore, 256 steps for each of three colors provide the entire range of colors for the last pixel exceeding 16.7 million. As shown in this conventional technique example, a data signal is supplied to Eprom 3. Eprom 3 will typically maintain at least 256 discrete memory locations, each for the level of possible strength expected from the input data. Attached to Eprom is the counter 4, which is -------- IT --------- (fr first read the back of Wen Wen; 1. evil · ^; (Chuan, Ran Ju, 3 pages)

581999 V. Description of the Invention (6) It is provided as a matching 8-bit counter. Clock 5 drives counter 4. As explained next in the description, the number of bits for the counter need not match the number of data bits and can be increased if desired. It is unlikely that the number of bits will be reduced, as this will reduce some of the degree of separation available to LED 1. The clock 5 drives the counter so that the update period "T," is separated into a smaller number of time portions. In the case of an 8-bit counter 4, this would include each represented by the number of consecutive binary bits from counter 4. It is 6 discrete time parts. Within a single memory location in Eprom, the memory location can also contain a sequence of bits, and the length of the sequence is determined by the number of knife values generated by counter 4. In this particular example shown in Figure 丨, each memory location in Eprom may contain a string of 256 individual bits. In order to understand the operation of this conventional technology embodiment, please refer to Figure 2, where the representative Partial memory location for 128 or 64 data entry

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs (Please read the precautions on the back before filling this page) The hidden position is displayed. These are only typical parts of memory locations to help explain this conventional technique. If the data 2 wants to drive the LED 1 50% of the time, the data 2 can be provided as the number of 128 binary out of the 256 possible binary numbers of an 8-bit representation. Memory location 128, as shown in Figure 2, shows some of the 256 bits in memory location 128 before 16. When the counter 4 cycles through each of its 256 discrete numbers driven by the clock 5, a continuous bit in the 128 memory address is considered. As shown in the previous 16 bits, every second bit in the 128 address contains a "1" to illuminate LED 1. This paper size applies to China National Standard (CNS) A4 (2) 0 x 297 mm 9 ^ 81999 A7

5. Description of the invention (7) The result is that the output 6 from Eprom 3 contains 128 individual pulses, the total of which is increased to 50% of the entire time period "T". Please refer to the memory location of data 2 in the form of a 64-bit binary representation in Eprom 3. You can see from the first 16 bits shown in Figure 2 that every 4th bit contains a "1" to make the output 6 64 discretely distributed pulses containing a total of 25% of the available time "T". As shown in this conventional technique, Eprom successfully distributes the pulses to the time "T" for each discrete input data signal During this period, practically, these Eproms can generate signals for multiple individual LED elements. Therefore, there is no need to provide a separate Eprom for each LED element. The actual number of LED elements 1 that can be addressed by each Eprom 3 simply exceeds eprom 3 The speed and the ability to provide a communication path to the LED element 1 which is also operated at a sufficient speed. At the current level of technology, it is still necessary to set multiple Eproms to drive any real segment of the display screen. A typical conventional technology system Six Eproms can be used on the driver board for each segment of 5 12 pixels containing 3 LED elements. Although this conventional technology overcomes the problem of flash, the use of Eprom and its connection Driving circuits for LEDs are expensive. Although the number of Eproms required can be reduced by including multiplexers or other technologies to allow Eprom to address more LEDs on average, these multiplexers also increase the overall Cost Object of the Invention One object of the present invention is to provide a method and device for driving a digital display by dispersing a PWM signal for a whole period of time, which can be adapted to the Chinese National Standard (CNS) A4 specification by providing this paper size (210 X 297 mm) I 丨 丨 (Please read the notes on the back before filling out this page) · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 10 ^ 81999

V. Description of the invention (8

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, the pulse wave is averaged over the entire period to overcome some of the shortcomings of the conventional technology, while reducing the need for expensive items such as Eprom or similar. Based on this, in the first level, the present invention can be widely referred to as a method including driving a digital display by spreading a pulse width modulation signal for a whole period of time. The method includes the following steps:-generating multiple The pulse wave signal is within the time period, T ";-each of these multiple pulse wave signals provides at least one other pulse wave within the time period" τ ";-each pulse wave of the multiple pulse wave signals is far from During this period, a discrete time interval within T "is generated relative to any other pulse wave within any of the plurality of pulse wave signals; and the pulse wave signals are combined according to > data to produce Including the time period during which the part representing the intention of the data input is added up, one of the scattered pulses of T ″ outputs a signal. Accordingly, in the second level, the present invention can be widely referred to as including the A device for driving a digital display with a wide modulation signal over a whole period of time, the device comprising:-at least one signal generator to generate a plurality of pulse wave signals, wherein each of these signals includes one of the individual pulse waves spreading, and Each of these The pulse wave is provided in a discrete time period with respect to the individual pulse waves of all the pulse wave signals in the entire period, and the AND device connects the bit of a data signal to the multiple pulses. Wave signal combination to select which one of these pulse wave signals should be assembled. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm). ----- line (please read the precautions on the back before filling this page) 11 A7 V. Invention Description (9 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs to represent the input data signal; and OR connection Device 'to group the selected signals within the time period, to form a single-series scattered pulse representing the input data. Accordingly, in the third level, the present invention can be widely referred to as including borrowing. A method for driving a digital 'shoulder' device by producing a plurality of time-discrete pulse signals suitable for subsequent combination, the method includes the following steps:-generating the number of-continuous binary subdivided-the desired time period; _ identifying the generated Lowest bit of consecutive binary bits The number of times of output-sequence, each identifying the lowest order bit for a single time period; and • generating-output pulses on one of the plurality of combinable outputs, including the time period for each subdivision. A different pulse wave and a pulse wave generated by a common lowest order bit identifier generated on a common output. According to this, in the fourth level, the present invention can be broadly referred to as including the generation by Uyouma. A digital display device can be driven by combining pulse signals. The device includes:-a counter that generates a sequence of binary numbers to subdivide the time period;-a lowest-order bit identifier that recognizes The lowest actuating bit in the binary sequence output by the counter, and outputting a continuous signal representing the lowest actuating bit, one such signal distinguished for each time; and-a pulse generator whose actuation is directed to Identified the lowest level of each and then! «Tr --------- (Please read the Jiang Yi matters on the back before filling out this page) This paper size applies the Chinese National Standard (CNS) A4 specification ( 210 X 29 7 mm) 12 581999 5

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 ------ -B7 ______ Description of the invention (10) The pulse of a bit on a discrete output, and the common lowest order for a common rotation Continuous pulses of bits. A simple description of the Phoenix-style will now describe a preferred embodiment of the present invention with reference to the following drawings, wherein: FIG. 1 shows a conventional technical device for providing a pulse width modulated signal spread throughout the time; Fig. 2 shows a representative memory address of a part of the Eprom device according to Fig. 1; Fig. 3 shows a structural diagram of a preferred embodiment of the present invention; and Fig. 4 shows a simplified embodiment of the present invention. Multiple pulse wave signals; and FIG. 5 is a diagram of one of the possible outputs from the simplified form of the present invention. Detailed description of the preferred embodiment The present invention relates to a method and apparatus for driving a digital display by spreading pulse width modulated pulse waves over a period of time. In this preferred form, the embodiment is in the form of a display screen displaying a digital data signal 2. For this description, the display screen can be represented by a single LED element 1. Of course, in practice, the present invention is implemented by controlling a plurality of these led elements 1 formed in individual pixels. Furthermore, the present invention is not limited to LED elements that are digital data of other display systems such as plasma TVs, LCD projectors, LCD screens, and similar devices that all suffer from the same inherent problems, and to disseminate pulse width modulation signals for updates Needs within the cycle. This paper size applies to China National Standard (CNS) A4 (210 x 297 mm) -------- ^ --------- line f Please read the precautions on the back before filling this page 13 581999 Λ7 __B; 5. Description of the invention (U) For simplicity, the preferred embodiment shown in FIG. 3-the preferred embodiment shows an embodiment in which a single LED 1 is driven by a pulse width modulation signal 6. Please refer to Figure 3, the device will be described with reference to the scattered pulse width modulation signal of a single 8-bit item provided in representative data 2. Although the device is described with reference to 8-bit digital data, it is only because the 8-bit digital data is fairly standard in the industry. Changes there can and do happen. In this embodiment, the present invention provides a signal generator 7 that outputs a plurality of pulse wave signals 8. Each pulse wave signal 8 can be combined with one or more other pulse wave signals 8 to provide a variety of pulse wave spreads over the entire time. As shown in Figure 3, the data 2 can be combined with these individual pulse wave signals 8 to determine the mix of signals needed to correctly represent the data 2. This is then provided as a cumulative pulse signal 6 to pass through the LED 1. The signal generator 7 which provides a plurality of signals seeks to provide a plurality of ranges of signals which can be easily combined to provide the various orders required to represent the digital data. Furthermore, it is expected that the signals can be combined such that the pulse wave provides multiple percentages of the time period covered by the pulse wave compared to the time period without any pulse wave. It is intended that they are combined to increase the amplitude of individual pulse waves, and therefore, multiple pulse wave signals 8 ideally include any individual pulse wave of any signal over a discrete time period compared to the pulse waves of other signals with which it can be combined. Pulse wave signal. At any given moment in time, a pulse can only be provided by one of a plurality of pulse signals 8. The present invention seeks to use a logic circuit to generate these pulse waves and acts as a signal generator 7 to implement the present invention. The circuit in this preferred embodiment includes a clock 5, a counter 4, a priority encoder 9, and a decoder 10. This paper uses ΤϋΤ standard boots Λ.! Specifications x 297 public love) ------- !!. ·% (Jing Xian read the note on the back page of the wheat page) Printed by the Bureau ’s Consumer Cooperatives 14 581999 Printed by Ji Jiyi ’s Intellectual Property Bureau ’s Consumer Cooperatives ------ ^ --- V. Description of the Invention (12) If the 8-bit digital data 2 is used, it is better The example shown in the embodiment 'Then this data may include any one of the 256 unique binary numbers representing the decimal number from 0 to 255. Although not strictly required, this preferred embodiment utilizes a clock 5 and an 8-bit unitary counter 4 so that the time period of the matching update cycle, τ, can be separated into multiple smaller time segments. The 8-bit counter 4 is used to separate the update time period, τ ,, into 256 smaller time periods, each represented by a continuous binary output from the counter 4. Note that similar to the conventional technique discussed in relation to Figure 1, the number of time segments into which the update period is separated need not match the number of possible levels in the digital data. In this example where the digital data contains an 8-bit signal, this preferred form uses an 8-bit counter 4 to match the data to fully process the data and explain clearly. However, counter 4 may be a larger number such as a 10-bit counter with an increase in bits for other uses. Alternatively 'it is also possible to use a smaller bit signal such as a 6-bit signal, although this will reduce the possible combinations and not make full use of all the levels available from an 8-bit digital signal.凊 The reference signal generator 7 generates a 256 value binary signal within the time period “Ding”. The 8 output bits designated as 仏 to 仏 on the counter 4 are mapped to the priority code. Input bits on encoder 9. A priority encoder seeks to determine the order of the number of binary bits to be entered. Priority encoders generally identify the highest operating bit within an 8-bit combination. In order to generate the desired multiple output signals 8, Please recognize that the better signal includes one of the pulses that covers 2 5 6 time segments per second, a step further (please read the back first; i Note 4: iu, K page) Ye Yi- ----- • 泉. I n IV-This paper size applies to Chinese national standard specifications (210x297 ?, complex) 15 u: V. Description of the invention (n) The letter h has a pulse wave every 4th time, one Further, the pulse wave signal has pulse waves every 8 time segments, etc., and the pulse waves do not overlap each other. The frequency of these pulse waves matches the frequency occurrence of the bit activity from the counter 4. The pulse wave bluff includes ^ /, Ding and n = 1, 2, 3, ... and so on. A large η will match the binary level of the total time segment. In this example, 2 5 6 time segments are 28 so the sequence terminates at η == 8. The right consideration directly maps to the priority encoder 9 Counter 4, the Ming felt that the spread of the k number in relation to the highest action bit was inappropriately spread in time. For example, the output bit Q7 is for the highest action position during 50% of the time, and is directed at the counter generated by counter 4. Half of the highest number of active bits. However, it is only for the last 50% of the highest number of active bits, and considering this as a possible source for the signal will result in a pulse signal, although it represents half of the The available time period, but concentrated on the last 5000/0 time period, does not spread throughout the time period. In contrast, the present invention recognizes that the desired pulse wave dispersion is not only generated by the highest action bit, but also by the counter 4 To generate the lowest operating position of Q. In generating 256 unique binary numbers from counter 4, Q0 will be the lowest operating bit per second of 256 binary numbers. In contrast, output bit Q7 Only for the lowest action bit of the binary number, 丨 〇 〇 〇 〇 〇 〇 00 ,. This is only a single occurrence. Using this method, the encoder 9 is connected to the counter 4 so that it replaces the cognitive highest action bit Ground, it actually recognizes the lowest operating bit from counter 4. This simply reverses the mapping between the output and input bits between the connections, so that the lowest output bit of counter 4 is bit Q0 is mapped to Prior to this paper size, the Chinese national standard (CNShY1 specification U Chuan x 4 7 mm) applies. Ιί «(Please read the urgent notes on the back A3.U, K page first) H ϋ H ϋ · Ministry of Economy ? Industry Consumer Cooperatives of the Property Bureau, Innu 16 ^ 81999 Λ;

V. Description of the invention (14) The highest input bit of the horse knitting machine 9 printed by the staff consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs was reached. This is shown by the line 11 as shown in FIG. The output from the priority encoder 9 contains 256 consecutive binary digits. Each representative indicates the number of decimals, 0 to 7, of the three most significant bits, as recognized by the input to the priority encoder 9. This consecutive number of 3 bits can be transmitted to the decoder 10 by the connection 12. The signal along the communication 12 to the decoder 10 contains a sequence of numbers generally in the form of 7,6,7,5,7,6,7,4,7, ... The decoder 10 seeks to interpret these 256 individual numbers into eight pulse wave signals. Are these output bits from the decoder? 7 to 1 > (). The decoder 10 outputs a pulse wave on the output P? When receiving an input signal representing a decimal number of 7. Similarly, receiving an input representing the number of decimals 4 will generate a pulse on output 卩 4 and so on. The frequency of the decimal number 7 on the output from the priority encoder 9 is such that it occurs at 256 discrete outputs per second. Therefore, the output from the decoder 10 at the output P? Is a pulse per second of 256 individual time segments. A simplified form of an output from a possible embodiment is shown in Figures 4 and 5. Please refer to Figure 4, a representative output of a 3-bit system is displayed. Using the same method, the output from the decoder of the 3-bit generator will include a pulse signal p2 where one pulse is generated every second pulse, and a signal P where one pulse is generated every 4th time segment. And a signal P0 containing a single pulse. These can be combined as desired to represent 8 paper sizes as represented by the number 0 to 7. The Chinese paper standard (〇 \: S) A'l specification (2) ϋ X 297 ?, t) M --- -------------- ^ (Please read the notes on the back before Λ11, rc: this page) 17 581999

V. Description of the Invention (15) The Consumer Cooperative of the Intellectual Property Office of the Ministry of Economic Affairs printed a separate signal. Please note: $ 丨 Checking M to the number is indicated by excluding all pulses. The 5th reference U′_cumulative output is displayed to represent the combination of the signals P2 and ρ0. This provides five pulses that are scattered throughout the time period "T,". In these embodiments, please note that the pulses are not completely spread across the time period "T," for all combinations of friends. As shown in Figure 5, five individual pulses are scattered as single-pulse waves, three-pulse squares, and further single-pulse backup digital data. During the entire period, Ding, 8 discrete smaller time segments «producing pulses are not allowed to be completely and uniformly distributed, unless the start and end points of the smaller time segment" T "are themselves asynchronous. Although this results in less ideal spreading on 3-bit signals, as the number of bits increases, a sequence of three consecutive pulse waves as shown in Figure 5 becomes less overall in spreading. Please return to the 8-bit embodiment shown in FIG. 3. It can be seen that the data 2 can be combined with multiple signals 8 through the setting of the AND gate 14. Data 2 contains a binary number from 0 to 255. If an example is used, the number 128 is expressed in binary as "100000,". As shown in Figure 3, data 2 can be provided through a buffer or the like 15, and a signal such as the number 128 The output will produce a "丨" on the output &. All other outputs will be zero. The 0? Bit from data 2 and the dagger signal from the decoder are added. As mentioned earlier, the P? Signal contains 128 individual pulses that are timed at a small time segment per second. The occurrence of a '' 1 '' on the 07 data bit and its combination through an AND gate results in the output of one of the P7 signals. The remaining data bits 〇00 to 〇6 are zero, and they are merged with the signals on pG to p6 through AND gates respectively. This paper size is applicable to the Chinese National Standard (CNS) / V1 specification (2) 0 × 297? ------------ · -------- Order ---- (Jing Xianjian read the note on the back with ?? '& • Xian Ranill, Qiao page ) 18 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 581999 Λ7 ____________ B: 5. Description of the invention (16) All remaining pulse signals on the output from the AND gate 14 will be suppressed. As a result, the output 6 supplied to the LED 1 is simply a 7 output from the decoder 10. A further example can be considered, if the coefficient 2 of the data 2 is represented by a binary 129. On the binary, the output from the buffer 15 will produce a "丨", on the 07 bit and a "1" on the 00 bit. Therefore, downstream from the AND gate, there is only P7 from the decoder 10. And PG still exist. All other pulse wave signals are suppressed. These two signals are combined through OR gate 17, so that the output 6 contains some 129 pulse waves. This series of pulse signal p7 generates a square in the middle of the time period. One additional pulse at the midpoint of three consecutive pulses. This is sufficiently close to a uniform dispersion to overcome the flash effect as previously described. It can therefore be seen that the present invention provides a series of pulses that are dispersed over time to represent the intention Both methods and devices for supplying various energy levels to the display element 1. The present invention implements it without the need for expensive lookup tables or the expensive Eprom of memory address segments, but with a logic circuit. The logic circuit uses The frequency of occurrence of the lowest order bits to generate the required signals for subsequent and incoming data combination. A further aspect of the present invention may become apparent to those skilled in the art when reading the description. Clear. The description related to the preferred embodiment does not consider to limit the invention, but merely illustrates a preferred embodiment and the application of the invention. References to specific integers throughout the description may replace functional equivalents when desired. The size of this paper applies to China National Standard (CNS) A4 specification (2) 0 × 297 mm. Packing -------- Order --------- line (please read the back first; 1 urgent Matters Ran iu, K page) V · y 19 581999 Λ7 Γ): V. Description of the invention (17 1 ... LED element 2... Digital data signal 3 ... Eprom 4... Counter 5.... Clock 6, 16 ... Output 7 .. Signal generator 8 .. Pulse signal component label comparison 9 .. Priority encoder 10 .. Decoder 11, 12 ... Wiring 14 .. AND gate 15 ... Buffer 17... 0. Gates 64, 128 ... Memory location I ... (4 is the first to read on the back; 1 meaning Ji Ran Ji 'f page) Employees ’Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs Printed on 20 paper sizes applicable to China National Standard (CNS) A4 specification 297 mm)

Claims (1)

Sixth, the Intellectual Property Bureau of the Ministry of Economic Affairs, employee consumer cooperatives, printed clothing, AS B8, C8, D8, patent application scope 1 ·-A method of driving a digital display, which is based on spreading the pulse width modulation signal throughout the entire time. The method includes the following steps: -Generating multiple pulse wave signals during the time period, Ding, within;-each such multiple pulse wave signal providing at least-individual pulse waves within the time period, τ ";-the multiple pulse wave signals Each pulse wave is generated in a discrete time interval within the period, relative to any other pulse wave within any of the plurality of pulse wave signals; and-combining these pulse waves according to data Signal to generate one of the scattered pulses, τ ,, during the time period contained in the sum representing the portion intended by the sender. 2. The method according to claim 1 of the patent scope, wherein The number of multiple pulse wave signals is equal to the number of binary digits required to represent the highest number of such data. 3. The method according to item 丨 of the patent scope, wherein the multiple pulse wave signals include The time period to 1 // T is “τ,” and η = 1, 2, 3,…, etc., and the maximum η is equal to the number of discrete time intervals into which the period “Τ” is subdivided. . 4 · According to the scope of Zhongqing patent! Method, wherein the combination of the pulse wave signals and data includes selecting the pulse wave "signs" by using the data and then combining the selected signals into a single trial companion number. 5. According to the scope of patent application The method of item 4, wherein the selection is implemented by matching an actuation bit in a binary data value input with a pulse wave signal to select the signal for the combination. This paper size applies Chinese national standards (CNS) A4 specification (210 X 297 meals) (Please read the notes on the back and fill in this page first) · IIII 21 patent application scope 6. A device for driving a digital display, which distributes the pulse width modulation signal Throughout the period, the device includes: • at least one signal generator to generate a plurality of pulse wave signals, wherein each of the coins contains a H wave and each individual pulse wave is provided during the entire period, Ding, within a discrete time period with respect to individual pulse waves of all the pulse wave signals; -AND connection device, which sends the bits of the data signal to the multiple pulse wave groups Select 'Which one of these pulse wave signals should be combined to represent the incoming data signal; and • OR connection device to combine the multiple selected signals within the time period,' ding 'to represent the A single series of scattered pulses sent to the data. 7. The device according to item 6 of the patent application, wherein the plurality of pulse wave signals include a signal corresponding to one of each binary bit of the input data signal. 8. The device according to item 6 of the scope of patent application, wherein the plurality of pulse wave signals include signals of pulse waves contained within a time period "τ" of approximately 1 // T and n = 1, 2, 3, etc. Until „equal to the binary level of the number of discrete time intervals into which“ 丁 ”is subdivided. 9. The device according to item 6 of the patent application scope, wherein the signal generator includes: a clock-driven counter, A sequence of binary numbers used to generate a subdivision of τ ”in a specified period;-an encoder to identify the lowest operating bit of the counter and generate a sequence of signals, each for each time segment, and identifying the lowest operating bit And a decoder for generating-outputting a pulse wave on a discrete output for each unique ^ jyy patent application range = moving bit, and generating the same output on the same output of each common lowest moving bit A method of driving a digital display is to generate a plurality of time-discrete signals suitable for subsequent combination. The method includes the following steps: G binary number; -Identify the level of the lowest actuating bit of consecutive binary numbers generated to output a sequence number, each for a single-time period subdivision, and identify the lowest order bit; and • one of multiple combinable outputs An output pulse wave is generated on the pulse wave, and contains a pulse wave generated for each subdivided time period and a pulse wave generated by a common lowest order bit recognition source generated on a common output. η. The method according to item f of the patent claim, wherein the output pulses are generated on a unique output for each unique lowest order bit identified. 12.—A device for driving a digital display, which generates multiple combinable pulse signals over the entire period of time. The device includes:-a counter that generates a sequence of binary numbers to subdivide the time period; Grade bit identifier, which recognizes the lowest operating bit in the binary sequence output from the counter, and outputs a continuous signal representing the lowest operating bit, and a paper size distinguished for each time Applicable to China National Standard (CNS) A4 (210 X 297 mm) 23-581999 Fine A8 B8 C8 D8, patent-applied signals; and • a pulse wave generator that actuates pulse waves on a discrete output for each of the unique lowest-ranked two-bit bits, and for pulses to be generated on a common A continuous pulse of the common lowest order bit on the output. 13. The device according to item 12 of the patent application scope, wherein the lowest order bit identifier includes a priority encoder connected to the counter, so that the highest order input of the encoder is connected to the lowest order of the counter Times output. M. The device according to item 13 of the patent application, wherein the pulse wave generator includes a decoder for receiving a signal from the priority encoder. 15. The device according to claim 12 in which the counter is driven to generate the binary number of the sequence, and the time period is subdivided by a clock. 16: The device according to item 12 of the scope of patent application, wherein the plurality can be combined ^ or contains n signals', where n represents the order of the number of binary numbers representing the number of time minutes from the counter. --------------------- Order --------- line (Please read the precautions on the back before filling this page) Use a moderate ruler U —— ^--I Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs