CROSS-REFERENCE TO RELATED APPLICATIONS
The present application claims priority to and the benefit of Chinese Patent Application No. CN 201710036370.4, filed on Jan. 17, 2017, the entire content of which is incorporated herein by reference.
FIGURE FOR PUBLICATION
FIG. 2
BACKGROUND OF THE INVENTION
1. Field of the Disclosure
The disclosure relates to the panel display, more particularly, to an AMOLED display panel device.
2. Background
Compared to a display product with a large size and a high resolution, a display product having a small size and a low resolution has a large reduction in the number of rows in the pixel array of the display, and each row of pixels essentially has a relatively abundant signal refresh time when the image refresh frequency is identical, so that the signal scan time per pixel can be appropriately reduced. In addition, as the small size display products has a small size, the local area for containing and placing the battery is very limited, so that the overall power consumption of the product system is considered. If we can reduce the number of the data lines that drive the pixel array, the number of ports of the driver chip can be greatly reduced. Specifically, as the total power consumption of the display panel is fixed, reducing the output ports of the driver chip can effectively reduce the power consumption of the driver chip, while the size and cost of the driver chip is reduced as the output ports is reduced. However, how to greatly reduce the number of ports of signal lines, and reduce the number of voltage sources corresponding to the signal lines, in order to effectively reduce the driver chip power consumption, and reduce the development cycle and development costs, is still one of the problems we are facing.
ASPECT AND SUMMARY OF THE INVENTION
An optional embodiment of the present disclosure provides a display device, comprising a pixel array and a plurality of data lines for applying data voltage signals to sub-pixel units in the pixel array, wherein each of the data lines is configured for applying a data voltage to a predefined series of the sub-pixel units in the pixel array, and the predefined series of the sub-pixel units comprises a plurality of the sub-pixel units.
BRIEF DESCRIPTIONS OF THE DRAWINGS
FIG. 1 is a traditional display panel device showing the basic architecture in which a signal line corresponds to a column of pixels.
FIG. 2 illustrates a pixel circuit of a 2T1C circuit structure with the disclosed embodiments.
FIG. 3 is a schematic diagram of a timing control of the pixel circuit of the 2T1C circuit structure with the disclosed embodiments.
FIG. 4 is a display device showing the basic configuration in which a signal line corresponds to a plurality of columns of pixels with the disclosed embodiments.
FIG. 5 is a schematic circuit diagram of a display device with the disclosed embodiments.
FIG. 6 is a schematic diagram of a timing control of a display device with the disclosed embodiments.
FIG. 7 is a circuit diagram of predefined series of sub-pixel units of each roe of the pixel array of a display device with the disclosed embodiments.
DETAILED DESCRIPTION OF THE INVENTION
The present disclosure will now he described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the disclosure are shown. This disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like reference numerals refer to like elements throughout.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” or “includes” and/or “including” or “has” and/or “having” when used herein, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not he interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, “around”, “about” or “approximately” shall generally mean within 20 percent, preferably within 10 percent, and more preferably within 5 percent of a given value or range. Numerical quantities given herein are approximate, meaning that the term “around”, “about” or “approximately” can be inferred if not expressly stated.
As used herein, the term “plurality” means a number greater than one.
Hereinafter, certain exemplary embodiments according to the present disclosure will be described with reference to the accompanying drawings.
As referred to FIG. 1, the display device is generally embodied in an array and the array has multiple rows of sub-pixel units and multiple columns of sub-pixel units. For example, the array as shown in FIG. 1, has multiple rows of sub-pixel units, such as the first row P11, P12, P13, . . . , P1m and the second row P21, P22, P23, . . . , P2m, and so on, till to the nth row Pn1, Pn2, Pn3 . . . Pnm, etc. Corresponding to the multi-row sub-pixel units, the array also has multiple columns of sub-pixel units, such as the first column P11, P21, P31 . . . Pn1 and the second column P12, P22, P32 . . . Pn2, and so on, till to the mth column P1m, P2m, P3m, . . . , Pnm, etc. The number of columns M and the number of rows N of the array are all natural number greater than one, and the context hereafter will introduce the present disclosure in an array.
As referred to FIG. 1, in the panel display area, a data line provided by a driver chip 10 or the equivalent driving device is usually used to cooperate with all the sub-pixel units of a column in the array. For example, the first data line D1 provides the data voltage signal VDATA to all of the sub-pixel units P11, P21, P31, . . . , Pn1 of the first column, the second data line D2 provides the data voltage signal VDATA to all of the sub-pixel units P12, P22, P32, . . . , Pn2 of the second column, and so on, the mth data line Dm provides the data voltage signal VDATA to all of the sub-pixel units P1m, P2m, P3m . . . Pnm of the mth column. Each row is shared with scanning line, for example, the first scanning line provides the scanning signal S1 to all of the sub-pixel units P11, P12, P13, . . . , P1m of the first row, the second scanning line provides the scanning signal S2 to all of the sub-pixels P21, P22, P23, . . . , P2m of the second row, and so on, and the nth scan line provides the scanning signal SN to all of the sub-pixel units Pn1, Pn2, Pn3, . . . Pnm of the nth row.
It is easy to see from the above disclosure that, in FIG. 1, the number of columns of sub-pixel unit is equal to the number of data lines. The number of data lines being equal to the number of columns will undoubtedly lead to the significant number of the output port of the driver chip 10, thus it is adverse to reduce the product size and the power consumption. One of the spirits of the disclosure is to overcome this concern and to avoid introducing too many data lines.
As referred to FIG. 2, in order to explain the present application clearly, it will take a typical 2T1C pixel circuit 12 as an example. Although to present disclosure has been described with the 2T1C pixel circuit 12 as an example, but this does not mean that the present application is limited to the 2T1C pixel circuit 12. In essence, the reader of this context should be aware that any pixel circuit that utilizes the data line to provide a data voltage signal to achieve light emission of the light emitting diode device is suitable for the solution in the present disclosure, and typically the pixel circuits in the following documents: U.S. Patent Application US20110227893, U.S. Pat. No. 6,847,340, and the like, or the Chinese patent application CN104036714A, are also applicable to the inventive spirit of the present disclosure.
In the 2T1C sub-pixel unit or pixel circuit 12 as shown in FIG. 2, a PMOS channel type thin film TFT drives transistor MD, and an OLED light emitting diode is connected in series between a first power supply voltage VDD (ELVDD in the figure) with a high potential and a second supply voltage VSS (ELVSS in the figure) with a low potential. One end of one storage capacitor CS is connected to the gate control terminal of the driving transistor MD, and the opposite end of the storage capacitor CS is connected to the source of the driving transistor MD coupled to the first power supply voltage VDD, and the drain of the driving transistor MD is connected to the anode of the light emitting diode, the cathode of the light emitting diode is connected to the second power supply voltage VSS. A gate transistor MS is connected between the data voltage signal input terminal Data Input of the 2T1C pixel circuit 12 and the gate of the driving transistor MD. The gate of the transistor MS is controlled by the scanning signal SN, for example, when the scanning signal SN is at the high level, the data voltage signal Dm supplied from the driver chip is transferred to one end of the storage capacitor CS via the turn-on transistor MS to implement the data writing, in which one end of the storage capacitor CS is connected to the gate of the transistor MD, and the data voltage signal is kept stable by the storage capacitor CS in one frame time, when the scanning signal SN is high in the next time, the above operation is repeated again. In the timing control of FIG. 3, in the entire array, for example, the scanning signal SN−1 of the preceding row, the scanning signal SN of the current row, and the scanning signal SN+1 of the subsequent row are shifted step by step, when the scanning signal SN−1 is in the active logic state (e.g., the high level), the pixel circuit 12 of the N−1th row implements the writing of the data voltage signal and then the scanning signal SN−1 returns to the low level. When the scanning signal SN is in the active logic state (e.g., the high level), the pixel circuit 12 of the Nth row implements the writing of the data voltage signal and then the scanning, signal SN returns to the low level. When the scanning signal SN+1 is in the active logic state (e.g., a high level), pixel circuit 12 of the N+1th row implements the writing of the data voltage signal and then the scanning signal SN+1 is returned to the low level, and so on. Whereby the light emission and display of the light emitting diode are realized. Here, the type of the gate transistor MS is merely a demonstration and is not a limiting condition, for example, if the gate transistor MS is NMOS, it is turned on when the scanning signal SN is at a high level, and vice versa. If the gate transistor MS is PMOS, it is turned on when the scanning signal SN is at a low level.
Since the spirit of the application resides in how to provide a way to provide a data voltage signal to a pixel circuit with less data lines rather than what circuit architecture the pixel circuit itself being. For example, as referred to FIG. 2, the first end of the gated transistor MS receives the data voltage signal Dm and when it is turned on the second end of the gated transistor MS can output the data voltage signal Dm. On the contrary, when the gated transistor MS is turned off the second end thereof cannot output data voltage signal Dm, so that it is applicable to any sub-pixel unit or pixel circuit as long as they meet the rule. With respect to the type of specific pixel circuit to which the second end of the gate transistor MS is connected in FIG. 2, the present disclosure does not care, and the reader, can assume that the 2T1C pixel circuit 12 here can be used as a substitute for any alternative pixel circuit, or sub-pixel unit, the spirit of the disclosure should be fully respected upon reading the scope of this document or the scope of the claims.
FIG. 4 shows a display device disclosed in the present disclosure, the display device comprises a pixel array and a plurality of data lines D1, D2, . . . , DK for supplying a data voltage signal VDATA for a sub-pixel unit Sub-Pixel in the pixel array, wherein the value K is a natural number greater than one, and the plurality of data lines D1, D2, . . . , DK correspond to a plurality of output ports connected to the driver chip 10. Unlike to conventional scheme of a data line corresponding to a column of sub-pixel unit in the prior art, the technical solution of the present disclosure requires that each individual data line is used for providing a data voltage signal to a predefined series of sub-pixel units PIX-SERI of any row of a pixel array Pixels-Array, and wherein the predefined series of sub-pixel units PIX-SERI should contain a plurality of sub-pixel units, rather than only a single sub-pixel unit.
As referred to FIG. 4, for example, the predefined series of sub-pixel units PIX-SERI of nth row of a pixel array is taken as an example, and the first data line D1 provides the data voltage signal to the predefined series of sub-pixel units PIX-SERI. For the sake of description, we briefly assumes that the predefined series of sub-pixel units PIX-SERI comprises six sub-pixel units, but substantially six is merely an example and does not constitute any particular limitation. If necessary, the number of sub-pixel units included in the predefined series of sub-pixel units PIX-SERI may he optional.
In the pixel array mentioned above, if we analyze the pixel array in view of the row, the first data line D1 (shown by a thicker black line) is connected to each of the first row of predefined series of sub-pixel units PIX-SERI {P11, P12, P13, P14, P15, P16}, and the first data line D1 is also connected to each of the second row of predefined series of sub-pixel units PIX-SERI {P21 , P22, P23, P24, P25, P26}, and so on, till the first data line D1 is connected to each of the nth row of predefined series of sub-pixel units PIX-SERI {Pn1, Pn2, Pn3, Pn4, Pn5, Pn6}, which has six sub-pixel units. Therefore, if we inspect the pixel array in view of row, it is obvious that the rule is: all first six sub-pixel units of the row, which are from the first row to the nth row, are connected to the first data line D1.
In the pixel array mentioned above, if we analyze the pixel array in view of the column, the first data line D1 is connected to all pixel units {P11, P21, . . . , Pn1} of the first column, and the first data line D1 is also connected to all pixel units {P12, P22, . . . , Pn2} of the second column, and so on, till the first data line D1 is connected to all pixel units {P16, P26, . . . , Pn6} of the six column. Therefore, if we inspect the pixel array in view of column, it is obvious that the rule is: all sub-pixel units of the column, which are from the first column to the 6th column, are connected to the first data line D1.
It is noted that the selection of the first data line D1 here is just an example for the convenience of the explanation and does not constitute any particular limitation. For example, the rule of row connection of the second data line D2 is: the 7th-12th sub-pixel units of the row, which are from the first row to the nth row, are connected to the first data line D2; the rule of column connection of the second data line D2 is: the 7th-12th sub-pixel units of the column, which are from the 7th column to the 12th column, are connected to the first data line D2. Subsequently, the third data lines D3, . . . , to Kth data lines DK follow the same rule.
As referred to FIG. 5, the sub-pixel unit or the pixel circuit 12 of 2T1C is still described as an example. The first end of the gate transistor MS (named as the first transistor) is connected to the first data line D1, and the second end of the gate transistor MS supplies the data voltage signal to the pixel circuit 12 or the similar sub-pixel unit, and the data voltage signal on the first data line D1 can be transmitted to the pixel circuit 12 or the similar sub-pixel unit via the gate transistor MS only when the gate transistor MS is turned on. On the contrary, the data voltage signal on the first data line D1 cannot be transmitted to the pixel circuit 12 or the similar sub-pixel unit via the gate transistor MS when the gate transistor MS is turned off. In the embodiment, the control end of the gate transistor MS is connected to the second end of a second transistor MJ, the first end of the second transistor MJ is used for inputting a timing control signal SWJ, and the control end of the second transistor MJ is coupled to and driven by the scanning signal SN. The operation mechanism of the circuit is that, when the scanning signal SN controls the second transistor MJ to turn off, the timing control signal SWJ cannot be transmitted to the control end of the gate transistor MS, and only when the scanning signal SN controls the second transistor MJ to turn on, the timing control signal SWJ can be transmitted to the control end of the gate transistor MS via the turn-on second transistor MJ, and the timing control signal SWJ which is switched between the high level and the low level can further drive and control the gate transistor MS to be turned on or turned off.
The gate transistor MS (the first transistor), the second transistor MJ, wherein if first end thereof is, for example, a drain (or source), the second end thereof is, for example, a source (or a drain), and the control end thereof is, for example, a gate. To act as electronic switches, the control end thereof can control whether the connection between the first and second ends are turned on or turned off. And if the second transistor MJ is an NMOS transistor, the second transistor MJ is turned on only when the scanning signal SN is in the active logic state with the high level (when the scanning signal SN is low level the second transistor MJ is turned off), and vice versa, if the second transistor MJ is the PMOS transistor, the second transistor MJ is turned on only when the scanning signal SN is in the active state with the low level (when the scanning signal SN is high level the second transistor MJ is turned off). As discussed above, the timing control signal SWJ can be coupled to the control end of the gate transistor MS only if the second transistor MJ is turned on. In this case, if the gate transistor MS is an NMOS transistor, only when the timing control signal SWJ is in the active logic state with the high level, the gate transistor MS is timed on (when the timing control signal SWJ is low level the gate transistor MS is turned off), and vice versa, if the gate transistor MS is the PMOS transistor, only when the timing control signal SWJ is in the active logic state with the low level, the gate transistor MS is turned on (when the timing control signal SWJ is high level the gate transistor MS is turned off). If the second transistor MJ is turned off, the gate transistor MS remains in the turn-off state.
The 2T1C sub-pixel unit or pixel circuit 12 in FIG. 5 may be applied to the pixel array of FIG. 4, and may be driven by the operation timing in FIG. 6. But we take the six sub-pixel units, the nth row of predefined series of sub-pixel units PIX-SERI {Pn1, Pn2, Pn3, Pn4, Pn5, Pn6} selected in the pixel array in FIG. 7, as an example to explain the control mode of this tuning of the present disclosure, and in FIG. 7, the pixel circuit 12′ of each sub-pixel unit may be of any type without being limited to the 2T1C model.
As shown in FIG. 7, the first ends of the first transistors MS1, MS2, MS3, MS4, MS5, and MS6 in the respective sub-pixel units Pn1, Pn2, Pn3, Pn4, Pn5, and Pn6 are uniformly connected to the first data line D1, and the data voltage signal is input from the first data line D1. When the first transistor MS1 in the sub-pixel unit Pn1 is turned on, the data voltage signal can be provided to the sub-pixel unit Pn1 through the second end of the first transistor MS1. Likewise, when the first transistor MS2 in the sub-pixel unit Pn2 is turned on, the data voltage signal can be provided to the sub-pixel unit Pn2 through the second end of the first transistor MS2, and so on, . . . , when the first transistor MS6 in the sub-pixel unit Pn6 is turned on, the data voltage signal can be provided to the sub-pixel unit Pn6 through the second end of the first transistor MS6.
As referred to FIGS. 6 and 7, the driving mechanism of the set of timing control signals SW1 to SW6 will be described later. In the sub-pixel unit Pn1, the first end of the second transistor MJ1 is input with the timing control signal SW1, and the second end of the second transistor MJ1 is connected to the control end of the first transistor MS1 in the sub-pixel unit Pn1. In the sub-pixel unit Pn2, the first end of the second transistor MJ2 is input with the timing control signal SW2, and the second end of the second transistor MJ2 is connected to the control end of the first transistor MS2 in the sub-pixel unit Pn2. In the sub-pixel unit Pn3, the first end of the second transistor MJ3 is input with the timing control signal SW3, and the second end of the second transistor MJ3 is connected to the control end of the first transistor MS3 in the sub-pixel unit Pn3. In the sub-pixel unit Pn4, the first end of the second transistor MJ4 is input with the timing control signal SW4, and the second end of the second transistor MJ4 is connected to the control end of the first transistor MS4 in the sub-pixel unit Pn4. In the sub-pixel unit Pn5, the first end of the second transistor MJ5 is input with the timing control signal SW5, and the second end of the second transistor MJ5 is connected to the control end of the first transistor MS5 in the sub-pixel unit Pn5. In the sub-pixel unit Pn6, the first end, of the second transistor MJ6 is input with the timing control signal SW6, and the second end of the second transistor MJ6 is connected to the control end of the first transistor MS6 in the sub-pixel unit Pn6.
As referred to FIG. 7, among the predefined series of sub-pixel units PIX-SERI, the control ends of the respective second transistors MJ1, MJ2, MJ3, MJ4, MJ5, and MJ6 in all the sub-pixel units Pn1, Pn2, Pn3, Pn4, Pn5, and Pn6 are simultaneously connected to a scan line 14 of the row (i.e., nth row) of the predefined series of sub-pixel units PIX-SERI, so that the control ends of the second transistors MJ1 to MJ6 simultaneously receive the same scanning signal SN which is input to the scan line 14.
As referred to FIGS. 6 and 7, when the scanning signal SN coupled to scan line 14 of the row of the predefined series of sub-pixel units PIX-SERI is at the stage of active logic state (e.g., high level), this stage is shown as a period T in FIG. 6, all of the second transistors MJ1, MJ2, MJ3, MJ4, MJ5, MJ6 are turned on, and at this stage, a series of timing control signals SW1, SW2, SW3, S W4, SW5, SW6 are sequentially inverted from the second logic level (e.g., low level) to the first logic level (e.g., high level), and then returned to the second logic level. Note that a set of timing control signals SW1 to SW6 are non-overlapping timings, which means that after the previous timing control signal jumps from the first logic level to the second logic level, the adjacent subsequent tuning control signal will jump from the second logic level to the first logic level, the previous and the subsequent timing control signal do not overlap each other. The following will explain the timing of the working mechanism in a number of stages T1 to T6 over the entire period T.
In the period T, the timing control signal SW1 is turned on to the high level in the first stage T1 so that the first transistor MS1 is turned on, and the sub-pixel unit Pn1 can extract the data voltage signal from the first data line D1 through the first transistor MS1, the data voltage signal stored in the sub-pixel unit Pn1 may be used to illuminate the light emitting diode, for example, the OLED of the red color R, and the timing control signal SW1 is turned back to the low level after the first stage T1 is finished.
After the end of the first stage T1, it comes the second stage T2, in which the timing control signal SW2 starts to turn over to the high level, to turn on the first transistor MS2, and the sub-pixel unit Pn2 can extract the data voltage signal from the first data line D1 through the first transistor MS2. The data voltage signal stored in the sub-pixel unit Pn2 can be used to illuminate the light emitting diode, for example, the OLED of the green color G, and the timing control signal SW2 is turned back to the low level after the second stage T2 is finished.
After the end of the second stage T2, it comes the third stage T3, in which the timing control signal SW3 starts to turn over to the high level, to turn on the first transistor MS3, and the sub-pixel unit Pn3 can extract the data voltage signal from the first data line D1 through the first transistor MS3. The data voltage signal stored in the sub-pixel unit Pn3 can be used to illuminate the light emitting diode, for example, the OLED of the blue color B, and the timing control signal SW3 is turned back to the low level after the third stage T3 is finished.
After the end of the third stage T3, it comes the fourth stage T4, in which the timing control signal SW4 starts to turn over to the high level, to turn on the first transistor MS4, and the sub-pixel unit Pn4 can extract the data voltage signal from the first data line D1 through the first transistor MS4. The data voltage signal stored in the sub-pixel unit Pn4 can be used to illuminate the light emitting diode, for example, the OLED of the red color R, and the timing control signal SW4 is turned back to the low level after the fourth stage T4 is finished.
And so on, after the end of the fourth stage T4, it comes the fifth stage T5, in which the timing control signal SW5 starts to turn over to the high level, to turn on the first transistor MS5, and the sub-pixel unit Pn5 can extract the data voltage signal from the first data line D1 through the first transistor MS5. The data voltage signal stored in the sub-pixel unit Pn5 can be used to illuminate the light emitting diode, for example, the OLED of the green color G, and the timing control signal SW5 is turned back to the low level after the fifth stage T5 is finished.
After the end of the fifth stage T5, it comes the sixth stage T6, in which the timing control signal SW6 starts to turn over to the high level, to turn on the first transistor MS5, and the sub-pixel unit Pn6 can extract the data voltage signal from the first data line D1 through the first transistor MS6. The data voltage signal stored in the sub-pixel unit Pn6 can be used to illuminate the light emitting diode, for example, the OLED of the blue color B, and the timing control signal SW6 is turned back to the low level after the sixth stage T6 is finished.
It can be learned from the timing of FIG. 6 and the pixel array architecture of FIG. 7 that, the scanning signal SN turns over from the second logic level (e.g., low level) which makes the second transistor turn off to the first logic level (e.g., high level) which is at the active logic state, so as to turn on the second transistor. Then the scanning signal SN is turned over to the second logic level after the end of the T period, and turn off the second transistor. More importantly, the desired R/G/B-R/G/B illuminating order is achieved from the six stages T1 to T6 over the entire period T.
As referred to FIG. 4, another rule disclosed in the present disclosure is that, in the pixel array, all of the sub-pixel units in the respective column (the first column to the sixth column) of the sub-pixel units {Pn1, Pn2, Pn3, Pn4, Pn5, Pn6} of each row (e.g., nth row) of the predefined series of sub-pixel units PIX-SERI {Pn1, Pn2, Pn3, Pn4, Pn5, Pn6} are supplied with the data voltage signal by the same first data line D1. That is, the sub-pixels P11 to Pn1 of the first column, the sub-pixels P12 to Pn2 of the second column, the sub-pixels P13 to Pn3 of the third column, the sub-pixels P14 to Pn4 of the fourth column, the sub-pixels P15 to Pn5 of the fifth column, the sub-pixels P16 to Pn6 of the sixth column, all the sub-pixel units in the six columns are supplied with the data voltage signal by the same first data line D1. In other words, the one-to-one connection relationship between the data line and the pixel column adopted by the traditional solution is replaced by the one-to-multi/many connection relationship between the data line and the pixel columns adopted by the disclosure.
The disclosure proposes a display driving solution, in which a signal line corresponds to a multi-column pixel without changing the structure of the original panel circuit, and adds an additional switch TFT on the Gate control line of the switching TFT of the Data input terminal of the original pixel circuit. By the timing control signal design, the disclosure greatly reduces the overall number of signal lines and the number of the driver chip output port, thus the development cost of the driver chip is effectively reduced, the overall power consumption of the system is reduced, and it is especially suitable for portable electronic devices and a variety of display devices with small size.
The foregoing is only the preferred embodiments of the disclosure, not thus limiting embodiments and scope of the disclosure, those skilled in the art should be able to realize that the schemes obtained from the content of specification and figures of the disclosure are within the scope of the disclosure.
Patent Application
20180204519
