TWI307076B - - Google Patents

Description

The present invention relates to a dynamic gamma correction circuit and a display device having the same, and more particularly to a device capable of rotating the fixed voltage of the digital/analog converter digital display. The invention relates to a dynamic gamma correction circuit and a display device having the same. A dynamic gamma correction circuit that enhances the development quality and a display device having the same. [Prior Art] As shown in FIG. 1, a liquid crystal display has a plurality of liquid crystals (Liquid

Crystal), and the light transmittance of a liquid crystal is inferior to the input voltage applied to the liquid crystal, and the ratio of the light transmittance of the liquid crystal to the input voltage is referred to as a gamma value.兀 兀 逍 逍 逍 逍 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入 输入However, the conventional liquid crystal display device can only provide a small set of fixed A voltages to the liquid crystal display as shown in FIG. 2, and the liquid crystal display device includes the liquid crystal display. ® & People, ^ ^ Package 3 One provides this set of fixed inputs |, Ma 6 positive circuit 7 and one digit/analog converter 8. : Combine: Figure 3, the gamma correction circuit used in the liquid crystal display device ... complex capacitor - resistor R and capacitor Λ and the two voltages can be obtained after the partial voltage of 0~Vf9〇C Ten output fixed voltages vi 8 can receive a digital image data and the corresponding fVf 9, and according to the output fixed voltage 1307076

The voltage difference between Vf 0 and Vf 9 converts the image data into an analog form of gray scale-voltage. For example, if the voltage difference between Vf 〇 and Vf 1 is 0.5 volt, then the number, bit/analog converter 8 According to the 0.5 volt, the image data assigned to the segment is converted into an analog form of gray scale voltage, and the gray scale voltage signal is sent to the liquid crystal display 9. If there are more digital image data to be converted according to this 5.5 * volt, then the voltage difference between each grayscale interval (Gray Level) of the image data converted to the analog form is very close, so that the converted The gray level φ level of the image is not obvious. Therefore, if the fixed voltage Vf 〇~vf 9 input to the digital/analog converter 8 can be dynamically adjusted according to the size of the image data corresponding to the interval, a larger image interval with a larger amount of data is provided. The fixed voltage difference of the range can greatly improve the gray level and resolution of the last displayed image. The liquid crystal located in the liquid crystal display 9 can be rotated with the size of the gray scale voltage signal transmitted from the digital/analog converter 8 to display a corresponding color tone. • The conventional gamma correction circuit 7 is fixed because the resistance R and the capacitance value c are fixed, so that the generated output fixed voltage vf is also fixed, so that the liquid crystal display 9 cannot be dynamically input by control. Fixed voltage ' to adjust the light transmittance of the liquid crystal. And because the magnitude of the voltage Vf is the same as the gamma

• The resistance value of the mA correction circuit 7 is related to the capacitance value. Therefore, the resistor R and the capacitor C need to be carefully selected and controlled to obtain the desired voltage Vf. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a dynamic gamma correction circuit 1307076 that provides a varying modulation reference voltage. 'Yama, another aspect of the invention, is to provide a display device with a dynamic gamma ray, and the image produced by the display device can have a more obvious gray level. Like quality. The present invention is a display device having a dynamic gamma correction circuit comprising: a liquid crystal display, an analyzer, a gamma reference voltage generator, a dynamic gamma correction circuit, and a digital/analog converter. • The a hai gamma reference voltage generator generates a fixed set of reference voltages. The analyzer can receive the image data, and can analyze the image data to calculate the gray scale value distribution of the image data, and send a group of control signals according to the analysis result. The dynamic gamma correction circuit can receive the set of fixed reference voltages output by the liquid crystal display, and adjust a voltage value of the set of fixed reference voltages according to a control signal sent by the analyzer to generate a set of modulated reference voltages, and A gray-scale age interval in which a plurality of pixels are distributed in the image data received by the analyzer provides a modulated reference voltage having a large variation range. The digital/analog converter can receive the same image data from the analyzer, and can receive the modulated reference voltage output by the dynamic gamma correction circuit, and can be based on the voltage difference between the modulated reference voltages. The image data is converted into an analog form of gray scale voltage, and the gray scale voltage signals are sent to the liquid crystal display to cause the liquid crystal display to display a corresponding hue. The dynamic gamma correction circuit used in the display device includes N current adjustment modules and N voltage adjustment modules. And each current adjustment module can be controlled by the control signal to select whether to output current and output current 1307076 value. The voltage adjustment modules are respectively electrically connected to the current adjustment modules, and each of the voltage adjustment modules can receive the fixed reference voltages, and the current adjustment module wheel can be electrically connected thereto. The output current signal is converted into a voltage signal, and the fixed reference voltage is adjusted according to the voltage signal to obtain a modulated reference voltage. <Embodiment] The foregoing and other technical contents, features, and effects of the present invention are related to

The detailed description of the four preferred embodiments with reference to the drawings will be apparent from the following description. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals. Referring to FIG. 4, a first preferred embodiment of a display device having a dynamic gamma correction circuit of the present invention includes a dynamic gamma correction circuit, a digital/analog converter, a liquid crystal display 3, an analyzer 4, and a Gamma reference voltage generator 5. The gamma reference voltage generator 5 can generate a set of fixed reference voltages Vref 1 VVref N and can input the set of fixed reference voltages Vref 心 心 心 to the dynamic gamma correction circuit! And the set of fixed reference voltages ~ 纡 1 to Vref N are N voltage signals, and N is a positive integer greater than or equal to i and the value of N can be changed depending on actual use conditions. This dynamic gamma correction circuit! The voltage value of the set of fixed reference voltage "1~VrefN" can be fine-tuned, and the adjusted set of modulated reference voltages Vref'1~Vref'N is sent to the digital/analog converter 2. The dynamic gamma The component composition and operation of the Ma correction circuit 1 will be described in detail later. 8 1307076 The digital/analog converter 2 can receive a digital image in the form of digits and the modulation reference voltages Vref' l~Vref, N And converting the image data into an analog form of gray scale voltage according to the voltage difference between the modulated reference voltages Vref 1 VVref and N, and the operation of the digital/analog converter 2 is the same as the conventional one. The liquid crystal display 3 includes a plurality of liquid crystal cells (not shown), and the liquid crystal cells located in the liquid crystal display 3 can follow the gray scale voltage transmitted from the digital/analog converter 2. The size of the signal is rotated to display a corresponding color tone. The analyzer can receive the same image data from the digital/analog converter 2, and can analyze the image data of the group to calculate the gray level of the image data. value And determining which gray level (pixd) of the image is located in the gray level, and sending a set of digital control signals to the dynamic gamma correction circuit according to the analysis result. The signal can inform the dynamic gamma correction circuit 1 which gray interval interval has more pixels, so that the dynamic gamma correction circuit 1 provides a large range of modulation to the gray interval according to the set of control signals. The reference voltage Vref is such that the image outputted by the liquid crystal display 3 has higher contrast and brightness. As shown in FIG. 5, the dynamic gamma correction circuit includes a voltage adjustment module 11 and N currents. The module 丨2 is adjusted, and the size and selection of the value of N are mentioned above. The current adjustment modules 12 are electrically connected to the voltage adjustment modules 11, respectively, and each current adjustment module 12 is The control signal is controlled to select whether to output the current and the magnitude of the output current, and the N voltages of the whole module 11 can respectively receive the fixed reference voltages 9 1307076 1 VVref N and output the modulations respectively. Reference electricity Vref, hvrj, n. 'Xuan N voltage fading module ii except for the value of the fixed reference voltage Vref received, the internal component composition and actuation are the same. And the N current adjustment modules 12 The internal composition and operation are also the same, so the following is only for one of the current adjustment modules 12 and one of the voltage adjustment modules 11. As shown in Figure 6, each current adjustment mode The group 12 includes a current increasing unit 13, a current reducing unit 14, and a selector 15. The current increasing unit 13 has four divisible bucket J-knife; current mirrors 131-134 with different forward currents and The four switches 135 ns ns, the workers # Ί 135 138 and the four current mirrors 131 134 134 are - a current mirror 131, a second current mirror m, a third current mirror 133 and a fourth current mirror 134 The four switches 135 138 138 are respectively a first switch 135 , a second switch 136 , a third switch and a fourth switch 138 . The first switch 135 is connected in series with the first current mirror 丄3 i for switching the current output of the first current mirror 131 (four). Similarly, the second, third, and fourth switches 136 138 138 are respectively associated with the second and the second Third, the fourth current mirror 132 134 is connected in series. It is also worth noting that the switching of these switches ... ~ is not controlled by the control signal transmitted by the analyzer 4 . The four current mirrors 131-134 can respectively generate four stable current values 1/2, 1/4 and 1/8, but it is worth noting that the current values are not limited thereto, and can be used according to actual use. Adjustment. And the four circuits (four) 131 to 134 and the four switches 136 to 138 respectively form a four-circuit, which are electrically connected in parallel with each other', and the currents output by the four circuits are collected into a total current (m is 10 1307076 real number) It is sent to the selector 15.

The current reducing unit 14 has four current mirrors 141 to 144 and four switches 145 to 148 which respectively generate different reverse currents, and the four current mirrors 141 to 144 are respectively a fifth current mirror 141 and a sixth current mirror. 142, a seventh current mirror 143 and an eighth current mirror 144, and the four switches M5 148 148 are a fifth switch 145, a sixth switch 146, a seventh switch 147 and an eighth switch 148, respectively. Similarly, the switches 145 to 148 are respectively connected in series with the current mirrors 141 to 144, and the switches 145 to 148 are controlled by the control signals transmitted from the analyzer 4, and can be used to switch the current mirrors 141 to 144. Current output. The four current mirrors 141 144 144 generate stable currents of j 1/2 1/4 and 1/8 ′, respectively, and are connected in series with the four switches 146 148 148 in four circuits, and the four circuits are mutually Electrical connection in parallel. The current output by the four current mirrors 141 144 will also be collected into a total current _i/M and sent to the selector 15. The selector 15 can receive the current increasing unit 13 and the two current signals Ι/Μ and 馗, which are sent by the current reducing unit π 14 , and are controlled by the control signal to switchably select one of the current signals " Output. Each of the voltage regulating modules 11 includes a current converting voltage step η2, a multiplexer 113, and an analog voltage adder 114. Electrical connection, including an increase, having a first input terminal, the current-turning voltage regulator 112 and the selector 15

And the amplifier A

The resistor R1 and an amplifier A, a second input terminal and an output terminal, and the gain resistor R1 is electrically connected between the first input terminal and the output terminal of the amplified A. And the first input of the 11 1307076 of the amplifier A receives the current signal I/M *_I/M ' output by the selector 15 and the second input is grounded. The current-turning voltage converter 112 can convert the received current signal Ι/M or -Ι/M into a correction voltage V', and the value of the correction voltage v, can be I/MxR1 or -I/MxR1. The multiplexer 113 is electrically connected to the current converting voltage device 112 and has two input ends and one output end, and one input end is grounded and the other input end receives the corrected voltage signal V output by the current converting voltage device 112, And the multiplexer 控制 3 is controlled by the control signal sent by the analyzer 4 and can selectively output one of the signals input to the two inputs. The analog voltage adder 114 is electrically connected to the multiplexer 113, and can output one of the fixed reference voltages Vref 1 VVref N output by the gamma reference voltage generator 5 and the signal output by the multiplexer 113. Adding, a modulation reference voltage Vref is obtained. And because the multiplexer 113 can output the corrected voltage signal V or the signal whose voltage value is zero, the modulated reference voltage

Vref' can be Vref+1/MxRl, Vref-1/MxRl or Vref. As shown in Fig. 7, the second preferred embodiment of the display device of the present invention having a dynamic gamma correction circuit differs from the first preferred embodiment in the internal composition of the dynamic gamma correction circuit 丨. The dynamic gamma correction circuit of the second preferred embodiment! Including - voltage adjustment module u and - current adjustment module 12. The current adjustment module 12 is the same as the first embodiment, and therefore will not be described again. The dust control module group 11 includes a multiplexer 113, a gain resistor R2, a voltage follower 116, and an analog voltage adder 114. The function and internal composition of the multiplexer "3, analog voltage adder 114 are the same as the first embodiment of the first 121307076. The current outputted by the current adjustment module 12 can generate a corrected voltage signal V after flowing through the gain resistor R2 of the voltage adjustment module 11, and the value of v can be I/MXR2 or -I/MXR2. The correction voltage signal v is input to one of the inputs of the multiplexer 113 via the voltage follower 116. The voltage follower 116 includes an amplifier A, and the amplifier a forms a negative feedback circuit for transmitting the corrected voltage signal v to the multiplexer 13. The other input end of the oxime 113 is grounded, and the multiplexer is controlled by the control signal sent by the analyzer 4 and can selectively output the modified voltage ν' or a zero voltage signal to the analog voltage. Adder 114. The fixed reference voltage Vref is also input to the analog voltage adder 114 and added to the signal output by the multiplexer 113 to obtain the modulated reference voltage, and the value of the modulated reference voltage Vref can be Vref. One of +I/MxR2, Vref_I/MxR2 or Vref. As shown in Fig. 8, the second preferred embodiment of the display device of the present invention having a dynamic gamma correction circuit differs from the first preferred embodiment in the internal composition of the dynamic gamma correction circuit 1. The dynamic gamma correction circuit 1 of the third preferred embodiment includes a voltage adjustment module u and a current adjustment module 12. The current adjustment module 12 is the same as the first preferred embodiment, and the current output or the output current of the current adjustment module 12 can be controlled by the control signal of the analyzer 4. The voltage adjustment module π includes a voltage converter 117 and a current transformer 112. The internal component composition of the current-turning voltage transformer 112 and the principle of the operation of the 131307076 are the same as those of the first preferred embodiment. The voltage converter 117 includes an amplifier A, a conversion resistor R3 and a second transistor T, and the voltage converter 117 can receive the fixed reference voltage Vref and convert the fixed reference voltage Vref into a fixed reference current. The iref is output, and the size of the fixed reference current Iref is Vref/R3. The selector 15 can control the current adjustment module 12 in addition to the current of ι/m or -Ι/M, so that the current output from the selector 15 is zero. The voltage converter 117 can generate a fixed reference current Iref, so the current value flowing into the current converter 丨丨2 can be Iref+I/M, Iref-1/M or iref. And the current is further processed by the current converting voltage device 112, the final modulated reference voltage Vref is obtained, and the value of Vref, is (Iref+I/M)xR1, or IrefxR1, and the value of Iref is Vref. /R3, and the resistance value of the conversion resistor R3 is selected to be the same as the gain resistance value of the current-turning voltage transformer 112. Even if R3 is equal to R1, the value of Vref' can be Vref+I/MxR1, and the reading is (9) Or Vref 〇 As shown in FIG. 9, the fourth preferred embodiment of the display device having the dynamic gamma correction circuit of the present invention is different from the first preferred embodiment in the internal composition of the dynamic gamma correction circuit 丨. The dynamic gamma correction circuit 1 of the fourth preferred embodiment includes a current adjustment module 12 and a voltage adjustment module U. The electric (four) module u is the same as the first embodiment, and therefore will not be described again. The current adjustment module 12 includes a lightning, switching, and leaving-, and a first, a third, a current reducing unit 14 and a selector 15. Moreover, the function and operation of the selector 15 are the same as those described above, and therefore will not be described again. The current increasing unit 13 includes a first switch 121, a first voltage selector 123, a forward current mirror ^5, and a first switch 127. The current reduction unit 14 includes a second switch 122, a second voltage selector 124, a reverse current mirror 126, and a first switch 128. In the embodiment, the digital control signal output by the analyzer 4 includes a first switching signal SW1, a second switching signal ^~丨, and a third switching.

The k number SW2, the fourth switching signal tear, the fifth switching signal and the eighth switching signal SW3. The first and second switching signals s W1 and _ are in a complementary relationship with each other, that is, when the first switching signal is logic 1, the second switching signal SW1 is a logical 〇, and vice versa. = When the nickname SW1 is logical 〇, the second switching signal is logical i. Similarly, the second and fourth switching signals SW2 and _ are also in a complementary relationship with each other. The fifth and sixth switching signals m SW3 and the culverts also have a complementary relationship with each other. Referring to FIG. 1A, the first switch 121 can receive the two voltage signals VI VDD and output one of the two voltage signals V1 and VDD to the first voltage selector 123, and the first switch 121 The plurality of transistors Τ' are included and the gates ((10)) of the transistors τ are respectively controlled by one of the first switching signal SW1 and the second switching signal. The second switch 122 is similar in composition to the first switch 121, but the voltage input to the second switch 122 becomes νι. And the electric signal outputted by the second switch 1 122 is transmitted to the second voltage selection 15 1307076. The first voltage selector 123 can divide four different magnitudes of voltage values for controlling the forward current mirror. 125 produces four different sizes of electricity such as .1/2, IM, 1/8 or 1/16. The first voltage selector 123 includes a plurality of transistors τ and a plurality of resistors R, and the gate of the transistors τ occupies the second, fourth, fifth, sixth switching signals, SW2 One of SW3, _ is controlled. The second voltage selector 124 is similar to the first voltage selector 丨23 for controlling the reverse current mirror 126 to cause the reverse current mirror 126 to generate four currents having different sizes, such as: _1/2. _1/4, _1/8 or _1/16. The first switch 127 is electrically coupled to the forward current mirror 125 for controlling the opening or closing of the forward current mirror 125, and the first switch 127 is controlled by a control signal transmitted from the analyzer 4. The second switch 128 is electrically coupled to the reverse current mirror 126 and is also controlled by a control signal from the analyzer 4. It should be noted that the current adjustment module 12 in the second preferred embodiment can also be replaced by the current adjustment module 12 of the fourth preferred embodiment; and the current adjustment module 12 of the third preferred embodiment is also available. The current adjustment module 12 of the first and fourth preferred embodiments is replaced. In addition, in the first, second and fourth preferred embodiments, each voltage adjustment module 11 may not include the multiplexer ,3, that is, the fixed reference voltage Vref input to the analog voltage adder 114 is It is only added to the correction voltage v, and there is no case of adding a zero potential signal. In the first, second, and fourth preferred embodiments, the current adjustment module 12 may also include only one of the current increasing unit 13 or the current minus 16 1307076 less unit 14, and This selector μ is also not needed at this time. That is, the current input to the voltage adjustment module 1 is only required to have a current value, such as a forward current output by the current increasing unit 13 or a reverse current output by the current reducing unit 14 The invention can be brought to the function of dynamic adjustment. However, if the current adjustment mode, the group 12 can only output the forward (four) or reverse current, the dynamic range of the modulation reference voltage Vref can only be increased or decreased, and the adjustable dynamic range is made. Shortened. It should be noted that although the number of the current adjustment module 12 and the voltage adjustment module u in the dynamic gamma correction circuit i - of the present invention may be one, in practical applications, it is preferable to use a plurality of numbers. To achieve better image quality. In summary, the display device with the dynamic gamma correction circuit of the present invention is different from the conventional method in that the dynamic gamma correction circuit 1 is designed, so that the input fixed reference voltages Vref 丨 V Vref N can be adjusted, and because The analyzer 4 analyzes the gray scale distribution of the image displayed by the liquid crystal display 3 in a statistical manner, so that the set of control signals can be sent to notify the dynamic gamma correction circuit 1 to dynamically change the voltage correction in an instant. The signal V' is such that the image displayed by the liquid crystal display 3 has a more pronounced gray level ' '" person', so that the animation quality of the liquid crystal display 3 can be improved. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent change and modification according to the patent application scope and the description of the invention. All remain within the scope of the invention patent. [Simple description of the diagram] 17 ί3〇7〇76 Figure 1曰_Liquid 曰曰 疋 - Schematic diagram showing the relationship between the light transmittance of a liquid crystal and the wheel-in voltage applied to the crucible; Figure 2 FIG. 3 is a block diagram of a gamma correction circuit of a conventional liquid crystal display device; FIG. 4 is a system block diagram of a display device having a dynamic gamma correction circuit of the present invention;

5 is a circuit diagram of a dynamic gamma correction circuit of the present invention; FIG. 7 is a circuit diagram of a dynamic gamma correction circuit of the present invention; and FIG. 8 is a dynamic gamma correction circuit of the present invention; FIG. 9 is a circuit diagram of a dynamic gamma correction circuit of the present invention; and a system block diagram; FIG. 10 is a fourth preferred embodiment of a second preferred embodiment of a preferred embodiment. Circuit diagram of the current adjustment module of the fourth preferred embodiment 18 1307076 [Description of main component symbols] 1 Dynamic gamma correction circuit 137 Third switch 11 Voltage adjustment module 138 Fourth switch 112 Current to voltage converter 14 Current reduction unit 113 multiplexer 141 fifth current mirror 114 analog voltage adder 142 sixth current mirror 116 voltage with 143 seventh current mirror 117 voltage converter 144 eighth current mirror 12 current adjustment core group 145 fifth switch 121 first Switch 146 sixth switch 122 second switch 147 seventh switch 123 first voltage selector 148 eighth switch 124 second voltage selector 15 selector 125 forward current mirror 2 digital/analog converter 126 reverse current mirror 3 liquid crystal display is not 127 first switch 4 analyzer 128 second switch 5 gamma reference voltage generation 13 current increase unit 131 first current mirror A amplifier 132 Second current mirror Iref fixed reference current 133 third current mirror R resistor 134 fourth current mirror R1 gain resistor 135 first switch R2 gain resistor 136 second switch R3 conversion resistor 19 1307076 SW1 first switching signal sw! second switching signal SW2 third switching signal SW2 fourth switching signal SW3 fifth switching signal SW3 sixth switching signal T transistor

Vref fixed reference voltage Vref' modulation reference voltage VI voltage source VDD voltage source VSS voltage source

20

Claims (1)

1307076 You. Month; Day Correction Replacement Page 10, Patent Application Range: - A display device with a dynamic gamma correction circuit, comprising: a gamma voltage generator for generating a fixed set of reference voltages; and a liquid crystal display for displaying images; , analysis benefits, can receive - image data, and can analyze the image data to calculate the gray scale value distribution of the image data, and send a set of control signals according to the analysis result; a dynamic gamma correction circuit for receiving and constituting the output of the gamma voltage generator; t reference voltage, and averaging the voltage value of the set of fixed reference voltages according to a control signal sent by the analyzer to generate a set Adjusting the reference voltage Μ ' and the dynamic gamma correction circuit can provide a modulated reference voltage having a larger variation range for the gray-scale interval in which more pixels are distributed in the image data received by the analyzer; and - the digit/analog The converter 'can receive the same image and material as the analyzer, and can receive the modulation reference output by the dynamic gamma correction circuit a voltage, and converting the image data into an analog form of gray scale voltage according to a voltage difference between the modulated reference voltages, and the gray scale voltage is reached by the liquid crystal display, so that the liquid crystal display is displayed Corresponding color tone; & wherein the dynamic gamma correction circuit comprises: a current adjustment module, each current adjustment module can be controlled by the set of control signals to select whether to output current and output current value, And Ν is a positive integer; and a voltage adjustment module (5), the branch is electrically connected to the #current adjustment module 21 1307076' and each voltage adjustment module can receive one of the fixed reference voltages, and can The current signal outputted by the current adjustment module electrically connected thereto is converted into a voltage signal, and the fixed reference voltage is adjusted according to the voltage signal to obtain the modulation reference voltage. According to the claim, the dynamic gamma correction circuit has a dynamic gamma correction circuit, wherein each current adjustment module includes a current increase unit, a current reduction unit and a selector, and The current increase unit 产生I generates a forward current value, and the current reduction unit generates an inverse: electrical 'heart value, and the selector selectively outputs the current generated by the current increasing unit or the 5 rush current reducing unit. 3. According to the scope of claim 2, there is a dynamic gamma correction circuit: display: device: wherein 'each current addition unit and each current reduction early white including m number current mirror and complex respectively and the current The mirror is electrically connected to the switch' and the current mirrors respectively output current values having different sizes, and the control signal can respectively control the opening and closing of the switches. According to the second aspect of the patent scope, there is a dynamic gamma Correction circuit display device, Longzhong, standby one*, electric day plus unit includes a first switching brother-electricity selector, - forward current mirror and - first switch two mother: electricity The flow reduction unit comprises a second switch, a second voltage selection benefit, a reverse current mirror and a switch, and the first switch=receives the voltage signal and outputs the two voltage signals. To the second η! pressure selector 'the first voltage selector can divide a plurality of different magnitudes of voltage values, and the snow is used to control the motor size generated by the forward current mirror' and the first The switch J Xing is forwardly connected to the current mirror, and the 22 1307076 :: knife changer can also receive the two voltage signals and output the two voltage signals: to the second voltage selector, the second voltage selection Having a plurality of different magnitudes of voltage values for controlling the magnitude of the current generated by the counterflow mirror, and the second switch is electrically coupled to the reverse current mirror, and the set of control signals can respectively control the first switch, ^ Switching operation of the second switch, the first voltage selector, the second voltage selector, and the second switch. Khanqi 5. The dynamic gamma correction circuit=display device according to claim 1 of the patent application scope, wherein 'Every voltage The whole mold includes a current-turning power and an analog voltage adder, and the current-turning voltage device can receive a current output by the current adjustment module, and convert the current signal into a _correction voltage signal, and the analog voltage The adder may add the modified voltage signal to the fixed reference voltage to generate the modulated reference voltage. 6 According to the method of the fifth embodiment of the patent, the dynamic gamma correction circuit has a non-alignment, wherein the current The voltage converter includes an amplifier and a gain resistor, and the gain amplifier has a -first input terminal, a second wheel input terminal and an output terminal, and the gain resistor is electrically connected to the first of the amplifier Between the input end and the output end, and the first input end of the amplifier receives the current signal output by the /Electrical L week group, and the second input end is grounded. A display device having a dynamic gamma correction circuit according to claim 1, wherein the per-voltage adjustment module comprises a current-converting π epoch and an analog voltage adder, the current-turning voltage converter Receiving the current output by the 3 hp current adjustment module, and converting the current signal 23 1307076 into a correction voltage signal, and the multiplexer can receive the modified electric dust signal and a zero potential signal, and can switch One of the two input signals is output to a sigma analog voltage adder, and the analog voltage adder can add the signal output from the multiplexer to the fixed reference voltage to generate the modulating reference voltage. 8. The display device with a dynamic gamma correction circuit according to claim 7, wherein the current-turning voltage converter comprises an amplifier and a gain resistor, the amplifier having a first input and a second input And an output end, wherein the gain resistor is electrically connected between the first input end and the output end of the amplifier, and the first input end of the amplifier receives the current signal output by the current adjustment module, and the second The input is grounded. 9. According to the patent scope of the request! The display device with a dynamic gamma correction circuit, wherein each voltage adjustment module comprises a gain resistor, a voltage follower and an analog voltage adder, and the current output by the current adjustment module is in the flow After the gain resistor, a correction voltage signal is generated, and the correction voltage signal is input to the analog voltage adder via the voltage, and the analog voltage adder applies the correction voltage to the fixed reference voltage. Add, and get the modulation reference voltage. . 1. The display device with dynamic gamma correction circuit described in item 9 of the patent scope, wherein the voltage follower includes an amplifier, the amplification-negative feedback circuit can correct the correction The voltage signal is passed to the analog voltage adder. U. According to the scope of the patent, the dynamic gamma|positive (four) 24 l3 〇 7 〇 76 cheek device is described in the first paragraph of the patent range, wherein each voltage adjustment module includes a -gain resistor, a voltage follower, a multiplexer and a type of voltage adder, the current output by the electric claw output module can generate a correction voltage signal after flowing through the gain resistor, and the correction voltage signal is rotated through the voltage follower Up to the multiplexer' and the multiplexer can also receive a zero potential signal and can switchably select to transmit the zero positioning signal or the modified voltage signal to: an analog voltage adder, and the analog voltage adder The modulated reference voltage is obtained by adding the fixed reference voltage to the plurality of electrical signals. = According to the scope of the middle eye (four) range, the dynamic gamma correction = display device 'where the voltage coffee includes an amplifier, the work! A negative feedback circuit is formed, and the correction voltage signal can be transmitted to the Xigongzhai. 13: The display device with dynamic gamma correction circuit described in item 1 of the patent scope is such that each Φ electric choke and the - ray 艎 I ^ m module include - voltage transfer / , L electric fall, the voltage converter can receive the fixed = voltage, and convert the fixed reference voltage into a fixed reference J ° Hai current converter can be: _ get 哕 α. The voltage signal is converted into a voltage, and the current received by the read current (4) is subtracted from the current output by the current adjustment module according to the current. The display of the road is as follows:: the dynamic gamma correction has a plurality of transistors and a conversion resistance == includes - the amplifier, the value of the fixed reference current is the read voltage of the fixed current and the conversion resistance More than 25 1307076 value. 1 5 · According to the patent application chrome _ ^ f according to the 13th item with dynamic gamma correction electric-gain resistor, the ur ur ur 包括 包括 包括 包括 包括 包括 包括 包括 大 大 大 大 大 大 大 大 大 大 大 大 大 大a second round-in and a round-out end and the gain resistor is electrically connected between the amplification== terminal and the wheel-out terminal, and the first input end of the amplifier receives the current signal output by the flow adjustment module, and the second input Ground. K-type dynamic gamma correction circuit can receive-group control signal like N solids... and N is a positive integer, the dynamic gamma correction circuit includes / current adjustment module, each current adjustment module can Controlled by the set of control signals to select whether to output current and output current values; and N voltage adjustment modules are respectively electrically connected to the current adjustment modules, and each voltage adjustment module can receive the fixed reference The voltage of the voltage can be converted into a voltage signal by the current adjustment module electrically connected thereto, and the fixed reference voltage is adjusted according to the voltage signal to obtain a modulation reference voltage. 17. The dynamic gamma correction circuit according to claim 16, wherein each current adjustment module comprises a current increase of a single two eight*, a current reduction unit and a selector 'and the current The increasing unit can generate a forward current value, and the current reducing unit can generate a reverse current value, and the selector can selectively output the current generated by the current increasing unit or the current reducing unit 26 1307076. According to (4) the dynamic gamma correction circuit described in Item 17 of the Patent Park, wherein the 'mother current increasing unit and each current reducing unit comprise a plurality of current mirrors and a plurality of switching current mirrors respectively electrically connected to the current mirrors The coils can be rotated separately to find the current values of different sizes, and the control signals can respectively control the opening and closing of the switches. 1 9. According to the scope of the patent application 筮 祀 祀 祀 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 17 ' ' ' ' ' ' ' ' ' ' And each current is reduced, #^帛-switch, -second voltage selector, one inverse" switch, and the first switch can receive two voltages:: (4) out, the signal of which - to the The first voltage selection second, the Haidi-voltage selector can divide a plurality of ^ values to control the current generated by the forward current mirror to electrically connect with the forward current mirror, and the Receiving the two voltages for the identification, the knife can also change the σ and take out the two voltage selections of the two voltage signals, and the second voltage selector of the Zen dynasty can be divided into f The voltage value of the size, to the ... knife & number of out = not used to control the current generated by the reverse current mirror:, and the second switch is electrically connected to the reverse current mirror, and .... =: control read separately The first switch, the second switching center, the first voltage selector, and the second switching operation. According to the dynamic gamma correction circuit described in claim 16 of the patent application, the voltage-modulation circuit includes a current-turning voltage converter and an analogy of 27 !3 〇7〇76 voltage adder, the current converter can receive a current output by the current adjustment module, and convert the current signal into a correction voltage signal, and the analog voltage adder can add the correction voltage signal The fixed reference voltage is applied to generate the modulated reference voltage. The dynamic gamma correction circuit according to claim 2, wherein the current-turning voltage converter comprises an amplifier and a gain resistor, the amplification having a first input terminal and a second input terminal An output terminal electrically connected between the first input end of the amplifier and the output, and the first wheel end of the amplifier receives the current signal output by the current adjustment module, and the second The input is grounded. According to the dynamic gamma correction circuit of claim 16, wherein the mother-voltage adjustment module comprises a current-turning voltage device, a multiplexer and an analog voltage adder, the current-turning voltage device Receiving a current output by the current adjustment module, and converting the current signal into a correction voltage signal, and the multiplexer can receive the correction voltage signal and a zero potential signal, and switchably input the two input signals One of the rounds is turned to the analog voltage adder, and the analog voltage adder can add the fixed reference voltage to the signal of the multiplexer to generate the modulated reference voltage. 23. The dynamic gamma correction circuit according to claim 22, wherein the current-turning voltage converter comprises an amplifier and a gain resistor, the amplifier having a first input terminal, a second input terminal and an output And the gain resistor is electrically connected between the first wheel and the output end of the amplifier, and the first input end of the amplifier receives the current signal output by the current adjustment module, and the second input end It is grounded. 28 1307076 24. The dynamic gamma correction circuit according to claim 6, wherein each voltage adjustment module comprises a gain resistor, a voltage follower and a analog voltage adder, the current is After the current outputted by the adjustment module flows through the gain resistor, a correction voltage signal is generated, and the correction voltage signal is input to the analog voltage adder via the voltage follower, and the analog voltage adder applies the correction voltage The signal is added to the fixed reference voltage to obtain the modulated reference voltage. 25. The dynamic gamma correction circuit according to claim 24, wherein 'the voltage follower includes an amplifier, the amplifier forms a negative feedback circuit' to transmit the corrected voltage signal to the analog voltage addition The dynamic gamma correction circuit according to claim 16, wherein each voltage adjustment module comprises a gain resistor, a voltage follower multi-and a class-like voltage adder 'by the current The current outputted by the adjustment module can generate a correction voltage signal after flowing through the gain resistor, and the correction voltage signal is turned into the multiplexer via the voltage follower, and the multiplexer can also receive the _zero potential Transmitting and selectively switching the zero positioning signal or the correction voltage signal to the analog voltage adder, and the analog voltage adder adds the fixed reference voltage to the voltage signal output by the multiplexer The modulated reference voltage is obtained. The dynamic gamma correction circuit according to claim 26, wherein the electric horn includes an amplifier, and the amplifier-shaped feedback circuit can transmit the correction voltage signal to the multiplex number. 28) According to the dynamic gamma correction circuit described in claim 16 of the patent application, and in 29 1307076, each voltage adjustment module comprises a voltage converter and a current-turning voltage device, and the voltage converter can receive The fixed reference voltage is converted into a fixed reference current, and the current-turning voltage converter converts the received current value into a voltage signal to obtain the modulated reference voltage, and the current-turning voltage device The received current is the fixed reference current minus the current drawn by the current adjustment module. 29. The dynamic gamma correction circuit according to claim 28, wherein the voltage converter comprises an amplifier, a plurality of transistors and a conversion resistor, and the fixed reference current of the voltage converter is rotated. The value of this is the ratio of the fixed reference voltage to the conversion resistance. According to the dynamic gamma correction circuit described in claim 28, The first input of the set of current signals is received by the current adjustment mode and the second input is grounded. 30