TWI301960B - Liquid crystal display and driving apparatus thereof - Google Patents

Description

1301960 发明, DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a liquid crystal display and a driving device thereof. [Prior Art] A typical liquid crystal display (LCD) includes an upper panel and a lower panel, wherein the upper panel is composed of a common electrode and a color filter array, and the lower panel is composed of a plurality of films. The transistors (TFTs) and a plurality of pixel electrodes are formed. The two plates have ® films that are respectively aligned and covered, and a liquid crystal display layer is interposed between the two plates. The pixel electrode and the common electrode are applied with a voltage, and a voltage difference between the electrodes forms an electric field. The variation of the electric field changes the direction of the liquid crystal molecules in the liquid crystal layer and changes the transmittance of light passing through the liquid crystal layer to obtain a desired image. A typical LCD data drive device includes a conversion register, a data register, a data latch, a digital-to-analog ratio (D/A) converter, and a round-out buffer. The data driver flashes the red (R), green (G), and blue (B) data and synchronizes the input with a timing point derived from a timing controller, and changes the φ timing system from a point-sequence system to a line. - A sequential system to output a data voltage to a data line of a liquid crystal panel assembly. The D/A converter uses this data: the lock knife converts the 13⁄4 RGB data to the analog voltage, and the analog voltage is made. The gamma reference voltages VGMA1 to vgmai8 provided by the p device are used. The slave mode LCD uses the same signal as the R, G, and B pixels.

1301960 assumes that its optical characteristics are the same, but it is not. Therefore, the color effects of each gray level will be unbalanced or excessively skewed. To solve this problem, it is recommended to provide different sets of gamma reference voltages as r, g, and B colors. However, this will increase the number of data drive device pins by 36, and the size thereof will increase. In addition, the number of blocks in the cell used to generate the gamma reference voltage will also increase. For example, the gamma reference voltage groups of the three colors of r, G, and B respectively generate corresponding three blocks. Another problem is that the increase of the external circuit not only increases the base area of the data driving device of the printed circuit board (PCB), but also greatly increases the production cost of the LCd. [Contents] The objects of the present invention are respectively for R, G, and B. The color produces a separate gamma reference voltage set to enhance the image quality of the LCD. Can # ..... 凌今, my brother, one of the LCD, : 2 t LCD includes a timing controller to rotate the R, G, B with -1 digits of the digital gamma The data is driven by the packet-to-conversion voltage generator and a digital-to-digital (DAC). The digital gamma storage digital storage is derived from the timing control digital gamma data, and the gamma reference voltage is generated by the # 堡 generator to generate gamma parameters, wherein the generator is used to generate data for each R, Gr Phase A, and B' individually convert the leaf into an analog voltage, and the analogy is the side of the electric gamma material. y is composed of the stored digital J Naiwu. The digit-class μ

Β 图像 资 资 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 The gamma reference voltage generator preferably includes a plurality of DACSs for receiving the digital gamma data of each of R, G, and B and converting the analog data into analog data. According to an LCD of a second aspect of the present invention, the LCD of the aspect includes a timing controller, a gamma reference voltage generator, and a data driving device. The timing controller rotates the digital gamma data of each of R, G, and B, and the gamma reference voltage generator converts the digital gamma data into analog data and outputs the data. The data driving device includes a sample/hold unit for performing the sampling/holding process of the gamma reference voltage, and rotating the sampling gamma reference voltage derived from the gamma reference voltage generator, and one digit The analog converter converts the image data of each of r, G, and B into an analog voltage and outputs 'the analog voltage is composed of the sampled gamma reference voltage. [Embodiment] The drawings appearing in the preferred embodiments of the present invention will be described in more detail below. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. For example, the numerals related to components in the full text. The portions of the LCDs and their data driving devices in the embodiments of the present invention will now be described in detail. Referring to Figures 1 and 2, a data driving device and a gamma reference voltage generator according to an embodiment of the present invention will be described in detail. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an exemplary data driving device of 1301960 according to an embodiment of the present invention, and Fig. 2 is a view showing a structural configuration of a reference voltage generator in the first drawing. As shown in Figure 1, you want to broadcast. Port 1010 According to the present invention, the data driving device 10 includes a >/overtime·six32, ..., a temporary register 100, a gamma reference electrode generator 200, a conversion The register 3, the ° ° 枓 枓 400 400, a data latch 500, a D/A converter 6 〇〇, and a round of the buffer 700. The conversion buffer 弩300 converts R, G, and Β data (D〇[7··〇] -D5[7:0]) by a timing controller (not y, out) and stores the data. Do as far as the Beca record state 400. D/A conversion 600 receives the data from the data door, and stores it in the data record || 4 0 0, and then turns to the letter a, and becomes a gray-scale voltage. The output buffer 7 〇〇 is stored from the D / A thorns cry. It is necessary to change the gray scale voltage of β 600, and when receiving a load break, 'the ash is thundering ^ Ai Jra cheek The self-voltage is applied to a plurality of data lines. Gamma

The register 100 stores the digital gamma data of each of the R, G, and B colors stored in the long-term D ^ ^ A, and the gamma reference voltage generator generates a plurality of gamma reference voltage groups of each m B Provided to the D/A converter 6 (9), and the gamma reference voltage group is composed of the value stored in the gamma register (10). As shown in FIG. 2, the gamma register 1 receives digital gamma data from a timing controller (not shown) via a plurality of data buss to respond to the gamma load signal GM A A load. The gamma reference voltage generator 2 (9) is coupled to two external voltage sources AVDD and GND, and converts the i-color and digital gamma data of each polarity into analog values to provide a positive/negative reference voltage as the DM converter 600. . This will describe in detail the gamma reference voltage yield in accordance with an embodiment of the present invention. In an embodiment of the present invention, it is assumed that the number of the digital gamma data sets provided by the gamma reference voltage generator 1301960 is equal to 9χ2χ3, for example, positive R, G, and Β gamma Data 〇\^111-DV9R, DV1G-DV9G, DV1B-DV9B and negative R, G and B digital gamma data DV10R-DV18R, DV10G-DV18G, DV10B-DV18B. However, the present invention is not limited to the above information, but any number of the digital gamma data sets is suitably applied. First, a gamma reference voltage generator according to a first embodiment of the present invention will be described below (refer to Fig. 3). As shown in FIG. 3, a gamma reference voltage generator 200 according to a first embodiment of the present invention includes a positive gamma voltage generator 210 as a positive gamma reference voltage and a negative gamma reference, respectively. The voltage generator 24 is used as a negative gamma reference voltage. In this embodiment, the gamma reference voltage generator 200 simultaneously receives digital gamma data of r, G, and B colors derived from a gamma register 丨00, and D/A converters (DACs) 221_223 and 25 1-253 individually generate corresponding gamma reference voltages. In order for the gamma reference voltage generator 2 to generate all of the gamma reference voltages of R, G, and B, the dACs 221-2 23 and 251-2 53 of the gamma reference voltage generator 2 00 are provided. The number must match the number of R, G, and B digital gamma data. For example, in a first embodiment of the invention, the gamma reference voltage generator 200 preferably includes 9x2x3 DACs. The detailed gamma's positive gamma reference voltage generator 210 includes nine DACs 221-223 of each of the R, G, and B colors, and various types of ratio-converted digital gamma data of the positive R, G, and B DV1R DV9r , dv1G-DV9G and 1301960 DV1B-DV9B to generate gamma reference voltages V1R-V9R, V1G-V9G and V1B-V9B of positive R, G and B. Similarly, the negative gamma reference voltage generator 240 includes nine DACs 25 1-253 of each of the R, G, and B colors, and various types of ratio-converted digital gamma data DV10R of the corresponding positive R, G, and B- DV18R, DV10G-DV18G, and DV10B-DV18B become negative R, g, and B gamma reference voltages V10R-V18R, V10G-V18G, and V10B-V18B. The D/A converter 600 converts the image data r, G0, BO, Rl, G1, B1, ... of R, G, and B into an analog voltage, which is provided by the DACs 221-223 and 252-253. The positive gamma reference voltages V1R-V9R, V1R-V9R, V1B-V9B and the negative gamma reference voltages vi〇R-V18R, V10G-V18G, V10B-V18B are composed. Meanwhile, the number of DACs that can be reduced in the gamma reference voltage generator 200 is related to the first embodiment of the present invention, and the embodiments of the fourth to twelfth drawings will be described later in detail. First, a gamma reference voltage generator according to a second embodiment of the present invention will be described in detail below (refer to Figs. 4 and 5). 4 is a diagram illustrating an exemplary gamma reference voltage generator according to a second embodiment of the present invention, and FIG. 5 is a circuit diagram showing a gamma reference according to a second embodiment of the present invention. In the sample/hold circuit included in the voltage generator. As shown in FIG. 4, the gamma reference voltage generator 200 and the negative gamma reference voltage generator 240 are also included in the gamma reference voltage generator 200 according to the second embodiment of the present invention, and the positive gamma reference The voltage generator 210 includes a DAC unit 220 and a sample/hold unit 230; and the negative gamma 1301960 reference voltage generator 240 includes a DAC unit 250 and a sample/hold unit 260. The DAC unit 220 includes nine DACs, which are analogous to the R, G, and B colors in the conversion time-splitting system, and input the positive bit gamma data DV1R-DV9R, DV1G-DV9G, and DV1B-DV9B to generate positive R, G and B gamma reference voltages V1R-V9R, V1G-V9G, and Vib-V9b. The sample/hold unit 230 includes a plurality of sample/hold circuit units (S/H 1) 231-233 for sampling the positive R, G, and B gamma reference voltages V1R-V9R from the DAC unit 220. , V1G-V9G and V1B-V9B. Similarly, the DAC unit 250 includes nine DACs, and the negative gamma data DV10R-DV18R, DV10G-DV18G, and DV1 OB-DV 1 8B input by each of the R, G, and B colors in the analog time-to-segment system. To generate negative R, G, and B gamma reference voltages V10R-V18R, V10G-V18G, and V10B-V18G. The sample/hold unit 260 includes a plurality of sample/hold circuit units (S/HI) 261_263 for sampling the negative gamma reference voltages V10R-V18R, V10G-V18G, and V10B V18G by the DAC unit 250. The R sample/hold circuit unit 231 samples the positive R gamma reference voltages V1R-V9R to provide to the D/A converter 600. The D/A converter 600 converts the R image data R〇, Ri··· in the data latch 500 into an analog voltage, which is composed of the sampled positive R gamma reference voltage V1R-V9R. . In the same manner, the G and B sample/hold circuit units 262 and 2 63 respectively sample the positive G and B gamma reference cells VlG V9G and V1B-V9B and supply them to the D/A converter 600. The negative gamma reference 9 1301960, the D AC unit 250 in the voltage generator 240 and the sample/hold unit 260, analogically convert the negative R, G, and B digital gamma data to generate the negative R, G, and The B gamma reference voltages V10R-V18R, V10G-V18G, and V10B-V18G are sampled to provide a d/Α converter 600. The 231 circuit unit of the sample/hold circuit units 231-233 and 261-263 of the sample/hold units 230 and 260 will be described in detail later (refer to Fig. 5).

The sample/hold unit 231 includes nine sample/hold circuits that are sampled by nine DACs of the DAC unit 220, respectively. Each sample/hold circuit includes a switch SW, a capacitor C1, and a buffer buf. The switch SW is turned on in response to a sampling start signal, and the gamma reference voltage of the DAC is stored in the capacitor C1 and sampled, and then the sampled gamma reference voltage is supplied to the D/Α converter via the analog buffer. 600. According to the second embodiment of the present invention, the number of the DACs provided in the gamma reference voltage generator 200 is equivalent to 9+9=18, and the number is reduced to three as compared with the foregoing first embodiment according to the present invention. One of the points.

Since the second embodiment of the present invention utilizes a separate DAC unit as the positive and negative electrodes, a DAC capable of supporting the positive and negative electrodes can be used. The above embodiment will be described in detail below (refer to Fig. 6). The first diagram is an illustration of an exemplary gamma reference voltage generator in accordance with a third embodiment of the present invention. As shown in FIG. 6, a gamma reference voltage generator 200 according to a third embodiment of the present invention, except for a single DAC unit 220 used as positive and negative gamma data, is the same as the second embodiment. the same. 10 1301960 洋细吕's DAC unit 220 consists of nine DACs, and the R, G and B color and polarity inputs in the digital conversion time-segment system are sequentially input into the positive R, G and B digital gamma data DV1R-DV9R , DV1B_DV9B and negative R, G and B digital gamma data DV10R-DV18R, DV10G-DV18G, DV1OB-DV18B to generate positive and negative R, G and B gamma reference voltages V1R-V9R, V1G-V9G, V1B-V9B , V10R-V18R, V10G-V18G and V10B-V18B. In addition, the DAC unit 220 provides the positive and negative R, G, and B gamma reference voltages to the two sample/hold 兀 23 0 and 260, respectively. The sample/hold units 230 and 260 are substantially similar to their description in the second embodiment of the present invention. According to the third embodiment of the present invention, the number of DACs provided in the gamma reference voltage generator 2 is nine, which is one-sixth less than the number according to the first embodiment of the present invention. According to the second and third embodiments of the present invention, since the timing controller (not shown) sequentially inputs the R, G, and B digital gamma data of each of the R, G, and B colors in the time-splitting system, The DACs provided in the DAC unit have a one-to-one correspondence with the digital gamma data. However, for each of the r, G, and B colors, eighteen digit gamma data can be sequentially rotated. The illustration of the above embodiment will be described in detail as follows. First, the gamma reference voltage generator according to the fourth embodiment of the present invention will be described later (refer to Figs. 7 and 8). Figure 7 is a diagram showing an exemplary gamma moxibustion voltage generator according to a fourth embodiment of the present invention, and Figure 8 is a view showing the gamma reference voltage generator in the fourth embodiment of the present invention. One of the exemplary sampling/holding 2 94 11 1301960 circuit units is provided. As shown in FIG. 7, a gamma reference voltage generator 2 is similar to the 'gamma reference voltage generator of the first embodiment, and includes a positive gamma reference voltage generator 210 and a negative gamma reference voltage generator 240. . The positive gamma reference voltage generator 210 includes three DACs 221-223 corresponding to positive R, G, and B digital gamma data DV1R-DV9R, DV1G-DV9G, and DV1B-DV9B, respectively, and three Sample/hold units 23 1-233 connected to DACs 221-223, respectively. In the same manner, the negative gamma reference voltage generator 240 includes three DACs 251-253 corresponding to the R, g, and B digital gamma data DV10R-DV18R, DV10G-DV18G, and DV10B-DV18B, and three sample/holds. Units 261-263. As shown in Figure 7, the positive r, 〇 and b digital gamma data from the timing controller are DV1R-DV9R, DV1G-DV9G, DV1B-DV9B and negative R, G and B digital gamma data DV10R-DV18R DV10G-DV18G and DV10B-DV18B, continuously input DACs 221-223 and 25 2-253 for each R, G and B color and polarity. The DACs 221-223 and 251-25 3 analogically convert their digital gamma data, and sequentially output the positive gamma reference voltages DV1R-DV9R, DV1G-DV9G, DV1B-DV9B and negative gamma reference voltages of the digital conversion. DV10R-DV18R, DV10G-DV18G and DV10B-DV18B to the sample/hold circuit units 231-233 and 261-263, respectively. The sample/hold circuit units 231-233 and 261-263 sample positive gamma reference voltages V1R-V9R, V1G-V9G, V1B-V9B and negative gamma reference voltages V10R-V18R, V10G-V18G and V10B-V18B, respectively. Provided to the D/A converter 600. 12 1301960 However, in each of the sample/hold circuit units 23 1-233 and 261-263 described in the fifth and third embodiments of the present invention, the nine gamma reference voltages are simultaneously sampled and output, and The sample/hold circuit units 23 1-233 and 261-263 according to the fourth embodiment of the present invention sequentially sample and output the continuously added gamma reference voltage. For example, as shown in Fig. 8, a sample/hold circuit unit 231 includes nine sample/hold circuits and is coupled to the output of the DAC 221 . The sample/hold circuit includes a switch SW, a capacitor C1, an analog buffer buf, and a conversion register S/R. The switch SW is used to convert the gamma reference voltage by the DAC 221, and the capacitor C1 passes through the The switch Sw stores the gamma reference voltage of the input, and the analog buffer buf outputs the gamma reference voltage stored in the capacitor ci to the D/A converter 600, and the conversion register S/R converts a sampling start Signal, the signal is switched to the next sample/hold circuit for the control of the switch being turned on or off. The sample/hold circuit unit 231 outputs the gamma reference voltage from the DAC 221 in turn in response to the sampled initial signal converted by the conversion register S/R. According to the fourth embodiment of the present invention, since the gamma reference voltage generator 200 respectively uses the six DACs as the positive R, G, and B colors and the negative R, G, and B colors, the d ACs and the second implementation In comparison with the case, the number is reduced by one third. In the fourth embodiment of the present invention, although a single DAC has been assigned to each of the R, G, and B colors using the respective polarities, the DACs have no relationship with the polarity. The above embodiment will be described in detail later (refer to Fig. 9). 13 1301960 As shown in FIG. 9, a gamma reference voltage generator 200 according to a fourth embodiment of the present invention includes r, G, and B gamma reference voltage generators 21〇r, 210g, and 210b, which generate voltages. The device is configured to generate R, 〇, and B gamma reference voltages respectively. "The r, g & b gamma reference voltage generators 21 〇 r, 2i 〇 g, and 210b include a DAC 22 〇 r, 220 g, 220 b, and a sample. / holding unit 23 0r, 230g, 23 0b' and each of the sample/hold units 23A, 23〇§ and 23〇b includes two sample/hold circuit units (S/H ΙΓ ) 23 lr, 232r and 231g, 2 32g and 231b, 2 32b. The DACs 22 0r, 22 0g, 220b analogically convert the R, G, and B digital gamma data, and sequentially receive DV1R-DV18R, DV1G-DV18G, and DV1B-DV18B derived from a timing controller, and output the respectively The analogy converts the R, G, and B gamma reference voltages V1R-V18R, V1G-V18G, and V1B-V18B into the sample/hold units 230r, 230g, and 23b. In the sample/hold units 23Or, 230g, and 230b, the sample/hold circuit units 231r, 232r and 231g, 232g and 231b, 232b, except for the last conversion of the sample/hold circuit units 23 lr, 23 lg, and 231b The output values of the S/R are the same as those of the register described in FIG. 8, and the output values are used as sampling initial signals of the sample/hold circuit units 232r, 232g, and 232b.

In detail, the sample/hold circuit unit 23 lr sequentially samples the positive R gamma reference voltages V1R-V9R of the R gamma reference voltages V1R-V18R, and continuously outputs the D/A from the DAC 22Or to the D/A. The converter 600, and the positive R gamma reference voltage V1R-V9R is based on the initial signal of the sampling; the sample/hold circuit unit 232r sequentially samples the negative R gamma reference voltage V10R-V18R, and outputs the output value to D/A converter 600, and the negative R 14 13〇1960

The gamma reference voltage V10R-V18R is based on the output value of the sample/hold circuit unit 231r to finally convert the register S/R. In the same manner, the sample/hold circuit unit 23 lg, 231b sequentially samples the positive G gamma reference voltage V1G-V9G and the B gamma reference voltage V1B-V9B according to the initial signal of the sampling; The sample/hold circuit units 232g, 232b sequentially select the negative G gamma reference voltage V10G-V18G and the negative B gamma reference voltage according to the last conversion register S/R of the sample/hold circuit units 231g and 232b. V10B-V18B is sampled. According to the second embodiment of the present invention, the number of the DACs is reduced by half compared with the fourth embodiment. Since the fifth embodiment has these DACs of R, G, and B, the DACs can be used as the respective polarities. An embodiment described above with respect to Fig. 1 will be described later. Fig. 10 is a diagram showing an exemplary gamma reference voltage generator in accordance with a sixth embodiment of the present invention.

As shown in FIG. 10, a gamma reference voltage generator according to a sixth embodiment of the present invention, as in the gamma reference voltage generator of the first embodiment of the present invention, also includes a positive gamma reference voltage generator 210 and Negative gamma reference voltage generator 240. The positive gamma reference voltage generator 210 includes a DAC 220, and a sample/hold unit 230 includes three sample/hold circuit units 231-23. The negative gamma reference voltage generator 240 includes a DAC 25 0, and the sample/hold unit 260 includes three sample/hold circuit units 26 263 °. The DAC 220 sequentially receives the positive r, g, and B digital gamma data. DV1R-DV9R, DV1G-DV9G, DV1B-DV9B, to convert the data 1301960 into gamma reference voltages V1R-V9R, V1G-V9G, V1B-V9B, and output the reference voltages to the sample/hold unit 230. In the same manner, the DAC 250 sequentially receives the negative R, G, and B digital gamma data DV10R-DV18R, DV10G-DV18G, and DV10B-DV18B to convert the data into gamma reference voltages V10R-V18R, V10G- V18G, V10B-VI 8B, and output the reference voltages to the sample/hold unit 260.

As described in the fifth embodiment, the sample/hold circuit unit 23 1 - 233 of the sample/hold unit 203 has the positive R, G, and B gamma reference voltages V1R-V9R, V1G-V9G, and V1B-V9B individually. For sampling, the sample/hold circuit is identical to the sample/hold circuit unit described in FIG. 8 except for the output values of the last conversion register S/R of the sample/hold circuit units 231 and 232. The output values are the sampling initial signals of the sample/hold circuit units 232 and 233, respectively. In the same manner, the sample/hold circuit units 261-263 of the sample/hold unit 260 sample the negative R, G, and B gamma reference voltages V10R-V18R, V10G-V18G, V10B-V18B, respectively. In the gamma reference voltage generator according to the sixth embodiment of the present invention, only two DACs are used. Meanwhile, in order to generate the gamma reference voltages of the respective R, G, and B, regardless of the polarity of the gamma reference voltage, only one DAC can be used. The above embodiment will be described later (refer to Fig. 11). Figure 11 is a diagram showing an exemplary gamma reference voltage generator in accordance with a seventh embodiment of the present invention. As shown in FIG. 11, a gamma reference voltage generator 200 according to a seventh embodiment of the present invention includes a DAC 220 and sample/hold units 230, 16 1301960 and the sample/hold unit 230 includes six samples/holds. Circuit units 231_233 and 261-263. The DAC 220 sequentially supplies positive digital gamma data DV1R-DV9R, DV1G-DV9G, DV1B-DV9B and negative gamma data DV10R-DV18R, DV10G-DV18G, DV10B-DV18B to convert the data into positive gamma. The reference voltages V1R-V9R, V1G-V9G, V1B-V9B, and the negative gamma parameters #€ MV10R-V18R, V10G-V18G, V10B-V18B, and output the reference voltages to the sample/hold circuit 230. The sample/hold circuit unit 231-233 of the sample/hold unit 230 samples the positive R, G, and B gamma reference voltages V1R-V9R, V1G-V9G, V1B-V9B, as described in the sixth embodiment. And the output value of the last conversion register of the sample/hold circuit unit 233 becomes the sampling initial signal of the sample/hold circuit unit 261, and then the sample/hold circuit unit 261-263 is based on the sampling initial signal described above. And for the negative R,

G and B gamma reference voltages V10R-V18R, V10G-V18G, V10B-V18B are sampled. In the seventh embodiment according to the present invention, only one DAC can be used to generate the gamma reference voltage. Meanwhile, in the second and third embodiments, the time for generating the gamma reference voltage is three times and six times that of the first embodiment respectively, and in the fourth and fifth embodiments, one is used. The time for generating the gamma reference voltage is nine times and eighteen times that of the first embodiment, respectively. The time for generating the gamma reference voltage is fifty-four times that of the first embodiment. Suppose a DAC is used to generate the gamma reference voltage for 1 microsecond. Using the DAC of Figure 5 requires 1 microsecond. Using the DAC of Figure 13 requires 130 μs for 54 microseconds. Since such a neck pq 勒 p 丨 amp 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 However, if the problem occurs due to such time, it may be necessary to reduce the time for using a sample/hold circuit unit S/H ΠΙ. Figure 12 illustrates an exemplary sample 7 hold circuit S/H III in accordance with another embodiment of the present invention, as shown in Figure 12, in accordance with another embodiment of the present invention, the sample/hold circuit unit S/Η Nine of the sample/hold circuits connected to the DAC output' and the sample/hold circuit includes a switch SW, a conversion register S/R, capacitors C1 and C2, an analog buffer buf, and an input and output converter S1 and S2. The switch SW transmits the gamma reference voltage from the DAC according to the sampling initial signal; and the conversion register S/R transmits the sampling initial signal to the next sample/hold circuit; the capacitors C1 and C2 are connected to First and second paths, and the gamma reference voltage is transmitted along the first and second paths to charge the Cl and C2 capacitors; the analog buffer buf is charged to the capacitor C1 and The gamma reference voltage is output to the D/A converter 600 in C2. In this example, the input switch S1 connected between the switch SW and the first and second paths alternates between the first and second paths according to a selection signal, and the input switch S2 is coupled to the first Between the first path and the second path, and the analog buffer alternates between the first and second paths according to the selection signal. In the sample/hold circuit unit S/H III, the gamma reference voltage input from one end is sequentially outputted via the transfer value of the transfer register S/R according to the sample initial signal. 18 1301960 The operation of a sample/hold circuit unit S/H III will be described below.

When a gamma voltage is stored in the capacitor C2, a changed gamma reference voltage is stored in the capacitor C1 to store the entire changed gamma reference voltage in a capacitor, and the capacitor system and the capacitor C1 Correspondingly, the capacitor C1 outputs the gamma reference voltage by changing the selection signal. Then, the gamma reference voltage is changed in such a short time. After the state continues and the gamma reference voltage is changed, a new gamma reference voltage is stored in the capacitor C2, and after the new gamma reference voltage is stored, only the capacitor C2 outputs the The charged gamma reference voltage. In the embodiments described above and below, we may use the sample/hold circuit S/H 可 instead of the sample/hold circuits S/H II and S/Η II. Many of the above embodiments have been described with respect to the internal knowledge of the data driving device 1 for generating the gamma reference voltage and reducing the area occupied by the Dacs to generate the gamma reference voltage. .

Meanwhile, in the data driving device 10 which is far apart, the DACs which can be used to generate the gamma reference voltage and such an embodiment will be briefly described hereinafter (refer to Figs. 13 to 18). Figure 13 is a diagram showing one of exemplary gamma reference voltage generators in accordance with an eighth embodiment of the present invention. Referring to Fig. 13, an eighth embodiment of the present invention is the same as the second embodiment except for the positive gamma reference voltage generator 220 and the negative gamma reference voltage generator 25, and the data driving device 1 is internally Positive and negative gamma reference 19 1301960 voltage generators 220 and 250 receive positive digital gamma data DV1R_DV9R, DV1G-DV9G, DV1B-DV9B and negative digital gamma data DV10R-DV18R, DV10G-DV18G, DV10B-DV18B, respectively. The positive gamma reference voltages V1R-V9R, V1G-V9G, V1B-V9B, and the negative gamma reference voltages V10R-V18R, V10G-V18G, V10B-V18B are generated. The positive gamma reference voltage generator 220 and the negative reference voltage generator 25 are each composed of a digital-to-analog converter of a multi-channel system, and their gamma reference voltage generators output positive R, G, and B gamma. The reference voltage 乂1 _ V9R, V1G-V9G, V1B-V9B and negative R, G and B gamma reference voltages V10R-V18R, V10G-V18G, V10B-V18B, time-divide for each r, G and B. The data driving device 1 is internally provided with the sample/hold units 230 and 260, and the sample/hold units 230 and 260 are received by the positive gamma reference voltage generator 220 and the negative gamma reference voltage generator 25, respectively. The positive R, G, and B gamma reference voltages and negative r, g, and B gamma reference voltages 'sample the reference voltages. This sampling/holding unit 230 and 26 is the same as the sampling/holding unit in the first embodiment. Since the eighth embodiment of the present invention has two digital-to-analog converters of a multi-channel system, the converter is divided for each polarity, and it can have a digital-to-analog converter, such as the 14th, regardless of the polarity. The figure shows. Figure 14 illustrates an exemplary gamma reference voltage in accordance with one of the ninth embodiments of the present invention. As shown in FIG. 14, the ninth embodiment except for a gamma reference voltage generator 220 is the same as the third embodiment, and a voltage generator 22 is provided inside the data driving device j 〇. The generator 220 is used to receive 1301960 digital gamma data from a timing controller 〇¥111-0¥911, 〇¥10-DV9G, DV1B-DV9B, DV10R-DV18R, DV10G-DV18B, DV10B-DV18B, To generate gamma reference voltages V1R-V9R, V1G-V9G, V1B-V9B, V10R-V18R, V10G-V18G, V10B-V18B. The gamma reference voltage generator 220 is composed of a digital-to-analog converter, and the generator 220 outputs positive r, g, and B gamma reference voltages 乂 111-

V9R, V1G-V9G, V1B-V9B and output negative R, G and B gamma reference voltages V10R-V18R, V10G-V18G, V10B-V18B, and for each R, G and B to sample/hold circuit unit 231-233 And 261-263 for time-segmentation. The sample/hold circuit units 231-233 and 261-263 are configured to respectively receive the positive R, G, and B gamma reference voltages and the negative R, G, and b gamma reference voltages to drive the negative material 1 These reference voltages are sampled in the crucible. The sample/hold circuit units 23 1 - 233 and 261 - 263 are the same as the sample/hold circuit unit of the second embodiment. As shown in Fig. 15, a tenth embodiment of the present invention is the same as the fourth embodiment except for the positive and negative gamma reference voltage generators 220, 250. The positive and negative gamma reference voltage generators 220 and 250 respectively receive positive and negative gamma reference materials, and generate a positive and negative gamma reference voltage via a timing controller and a digital interface. The positive and negative gamma reference voltage generators 220, 250 serialize the positive R, g & b gamma reference voltages and negative r, g and B gamma reference voltages of each of R, G, and B to provide the The reference voltage is applied to the sample/hold units 230 and 260 in the data driving device 10. The sample/hold units 230 and 260 are the same as the sample/hold unit in the fourth embodiment. 21 1301960 As shown in Fig. 16, an eleventh embodiment of the present invention is the same as the fifth embodiment except for a gamma reference voltage generator 220. The gamma reference voltage generator 220 receives the digital gamma data via a timing controller and a digital interface to generate a gamma reference voltage. The gamma reference voltage generator 220 serializes the gamma reference voltages of the respective R, g, and B to provide the reference voltages to the sample/hold units 230r, 230g, and 230b in the data driving device 1. These sample/hold units 23〇r, 23〇g, and 23 0b are the same as the sample/hold units 23〇γ, 23〇g, and 2 3 0 b in the fifth embodiment. As shown in Fig. 17, a twelfth embodiment according to the present invention is the same as the sixth embodiment except for the positive and negative gamma reference voltage generators 220, 250. The voltage generators 220 and 250 receive the positive and negative gamma reference transistors, respectively, via a timing controller and a digital interface to generate positive and negative gamma reference voltages. The positive and negative gamma reference voltage generators 220 and 250 serialize the positive R, G, and B gamma reference voltages and the negative R, G, and B gamma reference voltages of the respective R, G, and B to provide the The reference voltage is applied to the sample/hold units 230 and 260 in the data driving device 10. The sample/hold units 23 0 and 260 are like the sample/hold units of the sixth embodiment, each including three sample/hold circuit units 231-233 and 261-263. As shown in Fig. 18, the thirteenth embodiment of the present invention is the same as the seventh embodiment except for a gamma reference voltage generator 220. The gamma reference voltage generator 220 receives the digital gamma data via a timing controller and a digital interface to generate a gamma reference voltage. The gamma reference voltage generator 220 serializes the gamma reference voltages of the respective R, G, and B, and supplies the reference voltages to the sample/hold unit 230 in the data driving device 1 at 22 1301960. These sample/hold units 23, as in the seventh embodiment, also include six sample/hold units 231-233 and 261-263. As described above, since the data driving device has the gamma reference voltages of R, G, and b, when the gamma reference voltages of each of r, g, and B5 are used, temperature and color coordination may be adjusted as needed. In addition, a more varied implementation of a hue may be limited by the characteristics of the liquid crystal or the color filter. Furthermore, because the timing controller receives digital gamma data, even in the moving images, a dynamic window may be obtained because the new gamma value is applied to each picture. Of course, when the above-described driving integrated circuit (1C) is applied, the timing controller is also changed in due course. That is, when power is supplied to the timing controller, for each of R, G, and B, the gamma value is transmitted to the data driving device in a digital position, and when a dynamic window needs attention, the The gamma value is such that the gamma value can be adjusted by analyzing the input data of the window. BRIEF DESCRIPTION OF THE DRAWINGS The above-mentioned and other objects and advantages of the present invention will be more apparent from the detailed description of the preferred embodiments and the accompanying drawings in which FIG. A data driving device according to an embodiment; FIG. 2 is a diagram illustrating a gamma reference voltage generator in the first drawing; 23 1301960, FIGS. 3 and 4 are partial diagrams showing the respective according to the present invention. Exemplary data driving device in the first and second embodiments; FIG. 5 is a diagram showing an exemplary sample/hold circuit of the gamma reference voltage generator according to the second embodiment of the present invention; 7 is a partial diagram showing exemplary data driving devices according to the third and fourth embodiments of the present invention;

Figure 8 is a diagram showing an exemplary sample/hold circuit of a gamma reference voltage generator in accordance with a fourth embodiment of the present invention; Figures 9 through 1 1 are a partial diagram showing the basis Exemplary data driving device in the fourth to seventh embodiments of the present invention; FIG. 2 is a diagram illustrating an exemplary sample/hold gamma reference voltage generator according to an embodiment of the present invention; And FIGS. 13 to 18 are partial diagrams showing exemplary data driving apparatuses according to eighth to eleventh embodiments of the present invention. [Simplified description of component symbol]

10 data driving device 100 gamma reference voltage generator 200 gamma reference voltage generator 210 positive gamma voltage generator 21 Or R gamma reference voltage generator 220, 250 DAC unit 220r R digital analog converter 220g G digital analog conversion 24 1301960 220b B digital analog converter 221-22 3, 25 1 - 253 DAC (digital analog converter) 230, 260 sample / hold unit 231r, 232r R sample / hold circuit unit 231g, 23 2g G sample / hold circuit Unit 231b, 232b B sample/hold circuit unit 233 sample hold circuit unit 240 negative gamma reference voltage generator 261-263 sample/hold circuit unit 300 conversion register 400 data logger 500 data flash lock 600 D/A converter 700 output buffer

Cl, C2 capacitor SW switch buf buffer

Claims (1)

1301960 申请, Patent Application No. 1 · A liquid crystal display comprising at least: a timing controller for respectively rotating digital gamma data of R, G and B colors; and ~ a data driving device, the data driving The device includes a digital gamma storage for storing digital gamma data from the timing controller; a gamma reference voltage generator for generating gamma reference voltages of R, G, and B colors, respectively, The gamma reference voltage generator is used for converting the image signal into an analog voltage, and the analog voltage is composed of the stored digital gamma data; a digital-to-analog converter for converting each R, 0 and The image data of B becomes the analog voltage and is output, and the analog voltage is composed of the generated gamma reference voltage. β 2 2. As claimed in the patent scope! The liquid crystal display of the above, wherein the gamma reference voltage generator comprises at least a plurality of DACs, and the DAGs receive the digital gamma data of each of R, G and B and convert the data into analog data. 3. The liquid crystal display according to claim 1, wherein the gamma reference voltage comprises at least: a w code reference voltage generator, the generator converts the digital gamma data, and sequentially inputs Each is converted into a material to generate a gamma reference 26 1301960 with a first polarity of each of R, G, and B, and a second polarity gamma reference voltage generator, and the ^^^7 y generator converts the second polarity The digital gamma data is sequentially input to each of R, ^, and Β and converted into analog data to generate gamma reference voltages for each of R, G, and only & β of the second polarity. 4. The liquid crystal display device according to claim 3, wherein the first polarity gamma reference voltage generator comprises at least one of a plurality of hard DACs, and the DACs are used to convert the first a polarity digit gamma pin. and sequentially input each R, G, and B and convert it into analog data to generate a gamma horse reference voltage; and a first polarity sample/hold unit for _ 戮仃The sampling of the R, G, and gamma gamma reference voltages of the analog conversion is performed to generate the R, G, and gamma gamma reference voltages, and the second gamma is generated. The gold-to-f gamma reference voltage generator includes at least one DACs for punctuality, and sequentially inputs each R, G, and B, and converts it into B, and converts it into analog data to test the voltage; And the seat & φ ratio produces a second polarity sample / hold single conversion of each R, fu 4 early is used to perform the type: change each ... gamma reference voltage sampling / hold processing, to sample R, G, and B gamma reference voltages. 5. If the patent application scope is the first item, the liquid crystal display is used in the gamma. The upper nucleus reference voltage generator is at least scooped by the above-mentioned october i M u G 栝 - a plurality of DACs, and the DACs are converted. a first and a first-to-degree digital gamma data, and sequentially give each R, "B and turn into a class 3 Bayer, and send a gamma reference voltage; 27 1301960 a first a polarity sampling/holding unit for performing a sample/hold process of the R, G, and b gamma reference voltages of the analog conversion to generate sampled R, G, and B gamma reference voltages; A bipolar sampling/holding unit for performing sample/hold processing of the R, G, and B gamma reference voltages of the analog conversion to generate sampled R, G, and B gamma reference voltages. The liquid crystal display of claim 4, wherein each of the first and second polarity sampling/holding units comprises at least three sampling/holding circuit units for providing respective R, G, and B, And the sample/hold circuit unit is composed of a plurality of The sample/hold circuit is configured to be coupled to the output of the plurality of DACs, wherein the sample hold/circuit includes at least: the switches 'the open relationship is controlled to be turned on due to the reaction of the predetermined sampling initial signal/ Turning off the gamma reference voltage; capacitors that store the gamma reference voltage input via the switches; and buffers for outputting the sampled gamma reference stored in the capacitors The liquid crystal display according to claim 1, wherein the gamma reference voltage generator comprises at least: a plurality of DACs, and the gamma reference outputs of the DACs are continuously received and received The conversion is serialized and has a first and a second polarity digital gamma data and is converted into analog data, and the analog data generated after receiving the conversion is further provided to each r, G by an output line. And b, 28 1301960 This is a multi-to-one method and a plurality of sample/hold circuit units, respectively Corresponding to each DAC, and after performing the sampling/holding process of the gamma reference voltage, outputting the sampled gamma reference voltages of each of R, G, and B, and the gamma reference voltage is sequentially rotated by the DACs The liquid crystal display according to claim 1, wherein the gamma reference voltage generator comprises at least: an R gamma a voltage reference generator that outputs a sampled R gamma reference voltage after performing a sample/hold process of the gamma reference voltage, and is serially received and converted by serialization with - The first polarity R gamma data is converted into analog data with the R gamma reference data which has been serialized and has a second polarity; a G gamma reference voltage generator that performs the gamma reference voltage After sampling/holding processing, outputting the sampled G gamma reference voltage ' and sequentially receiving and converting the G gamma data which has been serialized and has a first polarity and is serialized with a first Bipolar G gamma reference material Converting to analog data; and a B gamma reference voltage generator that outputs a sampled B gamma reference voltage after performing a sample/hold process of the gamma reference voltage, and sequentially receives and Converting the B gamma data that has been serialized and having a first polarity to the B gamma reference material that has been serialized and has a second polarity is converted into analog data. The liquid crystal display of claim 8, wherein each of the R, G, and B gamma reference voltage generators includes at least: a DAC that sequentially receives and converts the serialized and Digital gamma data with a first and second polarity, the Dac is converted into analog data corresponding to each of R, G, and B, and then rotated out of the analog data, which is a method having many-to-one; a first polarity sampling/holding circuit unit that sequentially performs sampling/holding processing of the first polarity gamma reference voltage from the DAC and outputs; and a second polarity sampling/holding circuit unit, the circuit After the sampling/holding process of the first polarity sampling/holding circuit unit is completed, the unit receives the sampling initial signal from the first polarity sampling/holding circuit unit > and sequentially processes the samples. Sampling/maintaining with a first polarity gamma reference voltage. 10. The liquid crystal display according to the first aspect of the patent application, the gamma reference voltage generator includes at least: /, middle and upper fans - the first Polar gamma reference voltage generator, the electric gamma reference voltage of the house is after the <sampling/maintaining process, the polarity of R, G and B git", Jing * 乂 sampling with the & Reference voltage, the reference voltage system 蕤* h is received and converted serially with a first polarity: by sequentially converting the reference voltages into analog data; and ·, ,, and the first polarity generated by the material Gamma reference voltage generator 'The voltage generator outputs a sampled R, G, and B gamma reference voltage with a second polarity after performing a sample/hold process of the 30 1301960 gamma reference voltage, the reference voltage system By sequentially receiving and converting the gamma data that has been slaughtered and having the second polarity, and converting the reference voltages into analog data. 11. The liquid crystal display according to claim 1 , each of which is the first and The two gamma reference voltage generator comprises at least: a DAC having a many-to-one method, the DAC outputs a gamma reference voltage, and the reference voltage sequentially receives and converts the serialized digital gamma by a line The data becomes a sample/hold unit generated by the analog data, and the unit sequentially performs sampling/holding processing of each of the R, G, and B gamma reference voltages output by the DAC, wherein the sampling/holding unit is at least The sample/hold circuit corresponding to each of the anaesthesia, 〇, and B is included, and any of the sample/hold circuit units performs sampling/holding processing by sampling the initial signal, and after the sampling/holding process, the sampling is performed. The initial signal is transmitted to another sample/hold circuit unit. The liquid crystal display of claim 1, wherein the gamma reference voltage generator comprises at least: a DAC having a many-to-one method, The DAC outputs a gamma reference voltage, and the reference voltage is sequentially generated by converting and converting the serialized digital gamma data into a analog data. a first sample/hold unit that sequentially performs a sampling of the analog gamma reference voltage of the analog gamma reference output of the polar analog gamma reference voltages R, G, and B by the DAC 314 31 1301960 /maintaining processing, and then rotating the respective test voltages; and a second sampling/holding unit, after the sampling/holding process of the unit is completed, the sampling initial signal of the polarity sampling/holding circuit humiliation unit is connected, and :::Differential-polarity sampling/holding, with the analog gamma reference voltage, the first-to-be-successed by the DAC is sent. Polar analog gamma reference voltage 13. The liquid crystal display according to claim 12, wherein each of the first & second polarity sampling/holding units comprises at least three sampling/holding units corresponding to respective R, G, and B, and The sampling/holding unit performs sampling/holding by the initial signal of the sampling, and after the sampling/holding process is completed, the initial signal of the sampling is transmitted to the other sampling/holding circuit unit. The liquid crystal display according to any one of claims 7 to 9, wherein the sampling/holding power unit comprises at least a plurality of samplings connected in parallel to the output end of the DAC. And the holding circuit, wherein the sampling/holding circuit comprises: at least one conversion register for transmitting the sampling initial signal to an adjacent sampling/holding circuit; and a switch for controlling the initial signal to control the gamma The reference voltage output value is turned on/off; 32 1301960 a capacitor for storing the gamma reference voltage input through the switch and a buffer for outputting the gamma reference voltage of the sample in the capacitor 0 15 · The liquid crystal display device of claim 7, wherein the sampling/holding circuit unit comprises at least a plurality of sampling/holding circuits connected in parallel to the output end of the DAC. The sample/hold circuit includes at least: a conversion register for transferring the sampling initial signal to an adjacent sample/hold circuit; a switch for The sampling initial signal controls the on/off of the gamma reference voltage output value; the first and first electric grids are configured to store the gamma reference power, an input switch, the input switch is coupled to the switch, and the Waiting for the gamma reference voltage of the switch to the first and second capacitors, the buffer for outputting the gamma reference voltages stored in the first and second capacitors; and an output switch, An output switch is coupled to the first and second capacitors and transmits the gamma reference voltages stored in the first and second capacitors to the buffer. 1 6. A liquid crystal display, the liquid crystal display at least comprising: a timing controller 'for outputting digital gamma data of each of R, G, and B; and a 1301960-ma reference voltage generator for converting from the timing control The digital gamma data of the device becomes analog data to generate a gamma reference voltage; . a material feeding device, the data driving device comprising at least one sampling/holding unit for performing sampling/holding processing from the gamma reference voltage generator after the sampling/holding process of the gamma reference voltage The sampled gamma reference voltages; and the digital-to-analog converters are used to convert the image data of each of R, G, and 成为 into an analog voltage and perform a round-robin operation, and the analog voltages are The sampled gamma reference voltage is formed. 17. The liquid crystal display of claim 16, wherein the gamma reference voltage generator comprises at least a first and a second polarity gamma reference voltage generator and via a plurality of outputs. And sequentially outputting one of the first and second polarity gamma reference voltages of each of r, 〇 and ,, wherein the sampling/holding unit comprises at least one first polarity sampling/holding unit and - the first polarity sampling/holding a first polarity sampling/holding unit configured to perform a (four)-gamma reference voltage acquisition process to output a gamma reference voltage with a first polarity sampled to the digital analog converter; The second polarity sampling / 俾 last wy is used to perform the sampling/holding process of the second gamma reference voltage to rotate - the gamma reference voltage with the second polarity sampled to the digital-to-analog converter in. 18. The liquid crystal display of claim 16, wherein the gamma reference voltage generator is sequentially input through a plurality of inputs (four), and sequentially outputs 34 1301960 out of the first and a second gamma reference. a voltage, wherein the sampling/holding unit includes at least a first pole holding unit and a second polarity sampling/holding unit; the first holding unit is configured to perform a gamma reference voltage generator, Sampling/holding processing of a gamma reference voltage to output respective r, g, and samples with a gamma reference voltage of a first polarity to the digital-to-analog conversion::; and the second polarity sampling/holding unit a sample/hold process for performing a second polarity gamma reference voltage from the gamma reference snow pressure generator, outputting each R, ... sampled with a second polarity gamma reference: to In a digital-to-analog converter. 19. The liquid crystal display of claim 17, wherein each of the first and second sample/hold units comprises at least three sample/hold circuits for providing RG and B, and the sampling/ The holding circuit unit includes at least a plurality of sampling/holding circuits respectively coupled to an output of the plurality of gamma reference voltage generators, wherein the sampling/holding circuit comprises at least: a switch for corresponding sampling of the initial signal And controlling the on/off of the gamma reference voltage output value; the electric grid device 'for storing the gamma reference lightning pressure input through the switch; and a buffer 'for outputting and storing in the capacitor, sampling Gamma reference voltage. The liquid crystal display of claim 6, wherein the gamma reference voltage includes at least a first polarity gamma reference voltage generator and a second polarity gamma reference voltage generator The first polarity gamma reference voltage generator serializes one of the first polarity gamma reference voltages of each of R, G, and β via the outputs of the respective R, G, and B; and a second polarity gamma reference The voltage generator serializes a second polarity gamma reference voltage of each of R, g, and B via an output end of each of R, G, and ,, wherein the sample/hold unit includes at least a first polarity sampling/holding And a second polarity sampling/holding unit; the first polarity sampling/holding unit performs sampling/holding processing of each of the R, G, and B gamma reference voltages that are serialized and has a first polarity to output Each of the R, G, and B sampled gamma reference voltages of a first polarity is coupled to the digital analog converter, and a first polarity sample/hold unit performs each of the serialized and first polarity Sampled gamma of R, G and B Testing the voltage to output a sampled gamma reference voltage of each of the first polarity, R, G, and B, to the digital-to-analog converter, wherein each of the first and second polarity sample/hold circuits There are at least two sample/hold circuit units for performing sample/hold processing of the respective R, G, and B gamma reference voltages. The liquid crystal display of claim 16, wherein the gamma reference voltage generator serializes each of R, G, and B of a first and a second polarity gamma reference voltage to pass through Each of the outputs of 11, (, and 3) outputs each of R, G, and B, 36 13 〇 196 。. The sampling/holding unit described above includes at least R, G, and B samples /: Temple single 兀 'R , G and B sample 'hold unit performs each scale, 〇 and B sample/hold processing of the serialized gamma test voltage to output each sampled first and second polarity gamma reference voltage to the digital _ analogy In the converter, each of the R, G, and B sample/hold units includes at least a first sigma sampling/holding circuit unit and a second polarity sampling/holding circuit single Z-first polarity sampling/holding circuit unit ^ Executing sequentially - sampling of the "first polarity gamma voltage" is maintained and outputting; and a second polarity sampling /: holding the circuit unit in the first polarity of the sample / hold = the first polarity sampling / holding circuit Initial sampling of the unit:: Input two-sampling - sampling of the second polarity gamma reference voltage / According to the patent application, the gamma reference voltage generator includes at least a first live device and a second polarity gamma reference voltage. The generator, the Chu-polar gamma ginator, Lei 客 AM AM first "芩 电压 电压 产生 产生 产生 产生 产生 产生 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 、 、 、 、 The second polarity gamma reference voltage serializes and outputs the second polarity Rr su generator string RG and the B gamma reference voltage, wherein the sampling/holding unit includes at least the medium holding unit and the second polarity taking_holding order With the first-degree: the holding unit performs the serialized first-polarity R, ... gamma: thunder/pressure sampling/holding process to output the sampled r, g, and ^ reference electrical gamma reference voltages. Flute-to-polar polarity, and the first polarity sample/hold unit performs the second polarity R, Ο, and B gamma of the series 37 1301960 to output the sampled R, G, and b code reference voltage samples. / Keep the two-polar gamma reference voltage, The sampling/holding unit at least one of the R, G, and B, the straw 2 < sample/hold circuit unit, and any sample/hold circuit unit performs sampling by taking the initial signal of the sample /keeping processing, and after the sampling/holding process in any of the sampling/holding sheets is completed, the sampling initial signal will be valued. The sorrow is transmitted to another sampling/holding circuit. The liquid crystal display according to item [5], wherein the gamma reference voltage generator string is configured to string the first and second R, G, and B gamma reference voltages, and output the reference voltages through an output terminal. The sample/hold unit described above includes at least a first polarity sampling hold and a second polarity sample/hold unit; the first polarity sample hold unit sequentially performs the serialized first and second The first polarity R, G and the gamma gamma reference voltage of the polarity gamma reference voltage are sampled, and after being processed, the sampled first polarity R, G and the gamma gamma reference voltage are output; and the second polarity is sampled/ Guarantee After the sampling/holding process of the first sample/hold unit is completed, the unit receives the sampling initial signal from the first sample/hold unit, and sequentially performs the serialized first and second polar gamma The first polarity R, G& gamma gamma reference current sampling/holding process is used to output the sampled first polarity R, G and β gamma reference voltages, wherein each of the first and The second polarity sampling/holding unit includes at least two sample/hold circuits corresponding to each of R, G, and ,, and any of the samples/38 1301960 holding circuit unit performs sampling/holding processing by sampling the initial signal. After the sample/hold process is completed, the sample initial signal is passed to another sample/hold circuit unit. The liquid crystal display according to any one of claims 2 to 23, wherein the sample/hold circuit unit comprises at least a plurality of sample/hold circuits, and the sample/hold circuits are connected in parallel The method of connecting an output terminal to the gamma reference electrical waste generator, wherein the sampling/holding circuit of the eighth method comprises: a conversion register for transmitting the sampling initial signal to an adjacent sampling/holding circuit; The switch is configured to control the on/off of the gamma reference voltage output value corresponding to the initial signal; a capacitor for storing the gamma reference voltage input through the switch; and a buffer for outputting the output A liquid crystal display according to any one of claims 2 to 23, wherein the sample/hold circuit unit includes at least one plurality of sample/hold circuits, The sample/hold circuits are connected in parallel to an output terminal to the gamma meal voltage generator, wherein the sample/hold circuit described above includes at least a conversion register for transferring the sampling initial signal to an adjacent sampling / 39 1301960 holding circuit; the switch is for controlling the on/off of the gamma reference voltage corresponding to the initial signal; the first and second capacitors, The gamma reference voltage is stored; an output switch is coupled to the switch, and the gamma reference voltage that has passed through the switch is transmitted to the first or second capacitor corresponding to an externally mounted selection signal ' a buffer 'for outputting a gamma reference voltage stored in the first or second capacitor; and, /. An output switch coupled to the first and second capacitors & and transmitting a gamma reference lightning surge stored in the first or the second capacitor to the buffer. t 26.-A liquid crystal display driving device, the driving output voltage is used to display an image of the liquid crystal display, the driving device comprises at least a digital gamma storage device for storing from an external device Digital decay, 1, 1, 1. Dual-bit gamma data; voltage, the gamma-gamma reference voltage generator for generating gamma reference voltage ~ mA reference voltage generator for individual conversion, anamorphic, analog voltage The analog voltage system is composed of the scallops; the digital gamma worms and cockroaches of the cockroach; and the Bellows-digital-analog converter for converting the R, G and B national image assets into analogies respectively. The voltage is also output, and the analog voltage is composed of the gamma reference voltage of the material. ! Generating 40 1301960 27. A driving device for a liquid crystal display, the driving device is configured to output a data voltage to display an image of the liquid crystal display, the driving device at least comprising: a sampling/holding unit for performing at an external end a generated gamma reference voltage for outputting the sampled gamma reference voltage; and a digital-to-analog converter for converting each of the R, G, and B image data into an analog voltage and outputting the analog voltage system It consists of a sampled gamma reference voltage. 41