TWI246049B - Display device and its driving circuit, driving device and its driving method - Google Patents

Abstract

The object of the present invention is to provide a driving circuit of display device, driving device and driving method for simplifying wiring pattern and arbitrarily changing display gray-level for each data. To achieve the object, the driving circuit of display device outputs active voltage to the display device after inputting image data required to display image outputted from a timing controller, which is characterized in including: a gray-level voltage generating device only connected to ground and power to produce gray-level voltage; an image data converting device for converting the image data inputted from the driving circuit image data corresponding to the active voltage; and a D/A converter for inputting the gray-level voltage and the converted image data and selecting the gray-level voltage corresponding to the image data for use as the active voltage to output to the display device.

Description

V. Description of the invention (1) [Technical field to which the invention belongs 4 The sun and the moon are related to the device @ 詈 箄 Borrowing device and driving method, especially A: two in the display circuit, the driving power of the driving 4, driving! ^ Department The driver side includes a drive device and a driving method. [Previous technology] Rear drive: The display device inputs image data and control signals to the display body. As a driving device for the display device described above, the public power supply can display all gray levels (for example, refer to patent document υ. [Patent Document 1] Japanese Patent Application Laid-Open No. 7-181925 (Figures 1 and 2 on pages 5 to 6) [Summary of the Invention] The problems to be solved by the invention are as follows: ΐϋ !: V for driving devices for display devices' Use a wide range of time = replace the gray level with the power supply with the incomplete display of the vibration waveform of the supply system, the gray level, and simplify the circuit.

: f, the gray-scale voltage and the corresponding output signal of the drive I ί) of the display device described in Patent Document 1 (I): (the image :). The relationship between them is determined by the fact that the gray level cannot be arbitrarily changed according to the r characteristic. Therefore, in order to solve the above problems, the present invention aims at a

2185-6089-PF (N2) .ptd

The driving mode of the liquid crystal display device, in the design of the wiring structure that is easy to consider EMI countermeasures, by simplifying the wiring pattern, it can also arbitrarily change the pressure of the gray scale special solution. The source is connected to the data of the circuit; The voltage and power source image converter used by the electric transformer is a means for the image device to solve the problem. The characteristics required for the image display of the display device include: 'the image data generating the gray-scale voltage input and the D / A converter. 'Select and press the image to the display device' The image display station of the present invention 'is characterized in that the package connection' generates grayscale material and changes to the grayscale output 0 corresponding to the input of the grayscale electrical data The driving circuit is input from the sequence controller's scene. After the image data is output, the electric gray scale voltage generating device is output to the display device, which is only connected to ground and electricity. The image data changing device changes the driving material to correspond to the applied voltage. For the image, input the grayscale voltage and the grayscale voltage corresponding to the changed shadow data as the output. The driving circuit of the device, after inputting the image data required for timing control, is output to the display device as follows: a gray-scale voltage generating device, and only the ground voltage; an image data changing device, so that the image data corresponding to the voltage is used; and Λ voltage and the changed image data, after selecting and I5 white voltage, as the applied voltage to the display, the voltage required for image display output by the display device of the present invention is characterized by the following methods: After the input of the time sequence control image, the output is displayed to the display, and the output is connected to the ground and power only, resulting in gray.

2185-6089-PF (N2) .ptd

1246049 V. Description of the invention (3) Steps; the step of changing the image data inputted by the driving circuit = the image data corresponding to electricity; and inputting the grayscale six tj wide-ranging image data 'selection and the image The data corresponding to the gray-scale voltage is used as a step of outputting the action electric castle to the display device. [Embodiment Mode] Example 1 :::: f Explains the display-installation arrangement and driving method of the driving example 1 of the display device in this embodiment 1 according to the drawings. Fig. 1 is a block diagram showing the implementation of the present invention. 1 series timing controller, 2 series image Huzhou step signal 15 series line driver control signal (the following control signal ^ ^ ^ 糸 仃 driver power supply (the following power supply 6), γ series ground, 8 series line # 2% Μ Storage devices, 11 series operating voltage, 12 series driver with the following control signals 12), 13 series driver with power supply (below: for the 14 series driver, 15 series driver operating voltage, 16 series LCD panel. Signal In the 3rd week of Deshan Mountain, the sequencer 1 takes the external image data 2 from the outside, synchronizes the ^ Μ Μ output image data 2, and the control signal 5. Timing control 芎 1 original Μ: the dynamic output image data 2, input line Drive 8. In addition, the control signal 5 is output from the state 1 and the parameters ^^^ λ are used to control the storage device 9 series ~ the input is the same as that of the drive 2. The drive device is converted to a row-driven driving watch. Let the stored table values set for the actuator 8 to input the image ^ 2 rounds and the approved image data 2 be stored. The line driver is used to drive the display t signal 5 'to output to the LCD panel 16' the applied voltage 11 .LCD panel 16 is from the previous page 2l85-6089-PF (N2) .ptd 1246049 V. Description of the invention (4) The liquid crystal panel used in the liquid crystal display device is composed of a liquid crystal layer sandwiched by a TFT substrate and a CF substrate. The column driver 14 is a control 1C, which is input from the output of the timing controller 1. After controlling k number 1 2 ', the output voltage 15 of the TFT 0 N, 0 FF of the liquid crystal panel 16 is output. Based on the output voltage 15 of the 15 N, 0FF of the liquid crystal panel 16 output from the column driver 14, the TFT is driven. The liquid crystal layer is oriented. Therefore, the image can be displayed according to the image data. The number of the row driver 8 and the column driver 14 is set according to the number of pixels of the liquid crystal panel. The internal block diagram of the row driver 8 is shown in Fig. 2. The 7 series resistor , Ii $ D / A converter, 102 series image data changing device, 103 series gray level voltage, 104 series table value. On the device that generates gray level voltage, only the power supply voltage 6 and ground 7 is connected to the resistor 17. In addition, the input voltage is roughly divided into η equal parts by the resistor, and is input to the D / A converter 101 as n gray-scale voltages 103. Therefore, by using the resistor 17, it is not necessary to provide multiple Power supply voltage, can easily generate gray-scale voltage In addition, the image data 2 is inputted into the image data changing device 102, and the table value 104 inputted from the financial device 9 is changed to the shirt image negative material 4, and then the d / A converter 1 〇1 is input. In D / A In the converter 101, the grayscale voltage of the image data is selected from the inputted grayscale voltage 103 of the image data changing device 1 02, 夕 A evening *, your time T ^ clothes and i υ ζ, and The role of the lightning 懕 u As A ”is what it should be-1 η 1 ^ ^ ^ ^ Electricity £ 1 1 is output to the liquid day panel 16. D / Α is converted into the image data of the coefficient bit signal in 101 and the applied voltage is 11. q The characteristics of your cheeks are more than the electrical storage device shown in Figure 1. 9 includes EEPROM, etc. 1246049 V. Description of the invention (5) " '" ---------- Rewrite content Read-only memory. χ, using a dedicated memory storage table, setting the order to change the image data 2 to the desired gray level, and the second image lean table value 104, which is stored in advance. In addition, grayscale characteristics: the relationship between image data and grayscale voltage. … ^ The relationship between the image data 2 and the grayscale voltage 103 is shown in FIG. 3. This is a grayscale characteristic curve showing the relationship between the grayscale voltage and the grayscale voltage selected according to the image data 2. For example, as shown in FIG. 3 (a), when the gray level required by the user is specifically set to the gray level characteristic B, when the image data is Data (d), Vref (d) is selected as the applied voltage " Output to the liquid crystal panel 16. The grayness B is the relationship between the image data 2 and the gray-scale voltage. It is linear, not both. The image data changing device 102 is used to change the image data 2. However, when the grayscale characteristic required by the user is set to a non-linear grayscale characteristic A as shown in FIG. 3 (b), and the case where the applied voltage Vref (d) is wanted, it corresponds to the image data 4 To select the applied voltage, it is necessary to set the image data 4 input to the D / A converter 101 to Data (d). That is, the same operating power is output, and the situation of Vref (d) is also different due to the grayscale characteristics. The shadow image 2 shown in FIG. 3 (a) and the image data 4 shown in FIG. 3 (b) become Different values. The change of the image data 4 is as shown above, and the image data changing device 1 0 \ ′ in FIG. 2 is changed according to the table value 1 0 4 input from the storage device 9. For example, the image data changing device 1 02 changes the image data 2 of Data (c) to the image data 4 of D ^ ta (d), and inputs the d / a converter 101. After D / A is converted into 101, the gray-scale voltage Vref corresponding to the image data 4 is selected and output to the liquid crystal panel 16 as the applied voltage 11. And because the values of the parameter table can be rewritten arbitrarily,

1246049 V. Description of the invention (6) The operating voltage can be arbitrarily selected. It is preferred to change the grayscale characteristics vref (a) ~ Vref (g). The storage device 9 is constructed as shown in Fig. 1. In this case, the reliability becomes high. The external connection of the drive driver 8 is used to rewrite the values of the parameter table. The storage device 9 is shown in FIG. 4 and the internal structure provided in the drive driver 8 can also be used. By setting a plurality of table values to the internal two, wiring can be reduced, and a driving circuit can be manufactured at a low price. As shown in the above description, by adopting the structure of this embodiment, a gray-scale voltage generating device is provided in the row driver 8, and a gray-scale voltage is generated by the connection with the driving power $ and the ground. Therefore, no gray-scale voltage is provided. For step power supplies, the signal wiring from the time f controller to the line driver becomes simple, and countermeasures can be considered. . Since the image data changing device is installed in the row driver 8, the structure including the storage device 9 for storing the table values set for changing the image data can be changed to the image data corresponding to the required operating voltage. It is also possible to obtain the desired gray scale characteristics by changing the setting of the table value of the image data corresponding to the required applied voltage. The above-mentioned driving circuit, driving device, and driving method are suitable for display cracking of a liquid crystal display device and the like. In the driving circuit of this embodiment, the input wiring can be changed with less input gray-scale voltage, or the gray-scale characteristics can be arbitrarily changed by inputting data without inputting the gray-scale voltage. In addition, for each data of R, G, and B, the grayscale characteristics can be changed at a high resolution independently and the display quality can be improved. Especially in the case of assembly on a glass substrate such as COG, by reducing the gray-scale voltage and reducing the number of input wiring,

1246049 V. Description of the invention (7) It can reduce the area required for wiring. In addition, the problem of lower glass voltage is reduced. -, Example 2 of this resistance value Use Figures 5 and 6 to explain the meaning of this example. The same symbols are used to indicate this; set the province = figure and omit the contents described in Example 1. In the previous example, the configuration of the tribute changing device 102 was implemented in Embodiment 2. As shown in FIG. 5, the configuration of the timing control device 102 was adopted. In the examples! From time " Again :: Tribute change; == Device 8 output ... At the time of the two = = Image resource_Input image poor material 2 round-in timing controller 丨 The image data included in the change is 102, according to After the table value 104 inputted from the storage device 9 is changed to image 4 and material 4, the D / A converter 101 in the line driver 8 is inputted. …, FIG. 6 shows an internal block diagram of the row driver 8 in FIG. 6. In the setting of the gray level voltage I, only the power supply voltage 6 and the ground 7 are connected to the resistor 7. In addition, the input voltage is roughly divided into n equal divisions with a resistor, and is input to the D / A converter 101 as the n-th order voltage 103. '. In the D / A converter 101, select the image data changing device included in the timing controller 1 from the input gray level voltage 103, and the input corresponding to the image data 4 is required. The gray-scale voltage is output to the liquid crystal panel 16 as an applied voltage.

1246049

The external value of the parameter table can be rewritten from the outside of the timing controller 1 and the storage device 9 is connected as shown in FIG. 5. In this case, the general versatility is increased by 104. Also, as shown in FIG. 7, the storage device 9 can also be constructed by the inner two which is provided at:. In the structure provided inside, a plurality of tables are set. k & rensi's grayscale characteristics. The wiring can be reduced, and the driver circuit can be manufactured at a low price. The structure and driving method of the driving unit I except that the timing controller 1 includes the image data changing device 102 are the same as the embodiment. As shown in the above description, by adopting the structure of the second embodiment, a gray-scale voltage generating device is provided in the row driver 8, and a gray-scale voltage is generated by a connection with a driving power source and a ground. Therefore, no gray-scale is set. With the power supply, the signal wiring from the timing controller 1 to the row driver 8 becomes simple, and EMI countermeasures can be considered. In addition, because the video data changing device 102 is provided in the timing controller 1, the structure of the storage device 9 that stores the table value 1 〇4 set to change the video data 2 can be changed to the desired operating voltage. Corresponding image data 4.

In addition, the changeable order can be changed to the setting of the table value 10 of the image data 4 corresponding to the required applied voltage 11 to obtain the desired grayscale characteristics. Embodiment 3 The structure of a driving device of this embodiment will be described using FIG. 8. Since the same reference numerals as those in Figs. 1 and 2 indicate the same structure, the description is omitted.

2185-6089-PF (N2) .ptd Page 12 1246049 V. Description of the Invention (9) In addition, the contents described in Examples 1 and 2 will be described. The structure of the device 102 is changed: the image data set by the controller 1 is changed to the timing controller 1 and the line driver 8Vn is shaken as shown in Fig. 8. The output image data is set to 8 \ between the structure *. Since the timing controller i is changed to 1.2, according to the self-storage device 102. Image data Change to image data 4. Table 2 of the two input values will be the image data 2 image data 4 as shown in Figure 6-~ 〜 into the line drive 8. Then, this converter 101. Enter the external connection of the D / A converter 1 02 set in the row driver ^: Eruoguang ’two-use order and the image data change settings table value 04, versatility = high. November conditions' parameter table can be rewritten from outside. Device 102 memory built-in = shown in the & multiple table values can be changed using image data, optional = non-structural; V / f internal structure , By design can be driven by ^ Jagger to make the drive: the gray characteristics. The wiring and the like can be further reduced. Careful attention has been paid to the inclusion of the denier / image converter between the day-to-day controller 1 and the D / A converter 101. 102 = 实施 例 1, 2 — kind. As shown in the description of the structure and driving method of Le Yizhi and the above-mentioned ^ t, by adopting the structure of this embodiment 3, because a gray-scale voltage generating device is provided in the chirp driver 8, and driving = source and ground The connected command generates a grayscale voltage, and does not set the grayscale power consumption to one or two control controllers.

2185-6089-PF (N2) .ptd Page 13 1246049 V. Description of the invention (10) It is also because the image data changing device is set in the timing controller i, including the table stored for changing the image data 2 The structure of the storage device 9 having a value of 〇04 can be changed to the image data 4 corresponding to the required applied voltage. Also, it can be changed to the setting of the table value 1 0 4 of the image data 4 corresponding to the required operating voltage 1 1 due to the changeable order, and the desired gray scale characteristics can be obtained. Effects of the Invention The driving circuit of the display device of the present invention inputs the image data required for the image display output by the timing controller and outputs the applied voltage to the display device, which is characterized in that it includes: It is connected to the ground and power supply to generate gray-scale voltage. The image data changing device causes the drive to be changed: the second is to change the image data to the image j 'and the D / A converter that respond to the function. Input The grayscale voltage and the changed image material, select the grayscale voltage corresponding to the image data

= Power consumption, display device output; driving from the timing controller to the line] J L Ϊ t is simple, considering EM 1 countermeasures, it can also be changed to image data corresponding to the required operating voltage. The test circuit of the display device of the present invention is a driving circuit of the present invention, which inputs image data required for time-series control image display and outputs to the display device as i. Because it is characterized by including: a gray-scale voltage generating device, only t and power Connect to 'generate gray scale voltage; image data changing device, make μ & ^ more image data corresponding to the applied voltage: and convert to, enter the gray scale voltage and the changed image data, select 2185 on page 14 -6089-PF (N2) .ptd Ϊ246049 V. Description of the invention (11) ____ Select and output the image data display device. After the high-level electric dust, as the function of the electric house, it is simple and detailed! To the guard, the signal wiring of the main line driver of the sequential f system becomes the display device. In addition, the driving device is suitable for use in liquid crystal display devices. The present invention W Θ cry α recognition, Θ of the display device's moving direction, earth +. . The output image is displayed as required, and the voltage for timing control is used in turn because it is characterized by the steps of outputting gray scale electric dust to the display device after displaying the watch material, and connecting the driving power and power supply. Generate the image data corresponding to the applied voltage, input the image data variable-level voltage and the changed image data n steps; and input the gray-scale gray-level voltage as the applied voltage, corresponding to the image data It can be changed to the required operating voltage: the step of not outputting the device; mm i 2185-6089-PF (N2) .ptd Page 15 1246049 Brief description of drawings Figure 1 is a block diagram of a display device of the present invention. FIG. 2 is an internal block diagram of the row driver of FIG. 1. FIG. Figures 3 (a) ~ (b) are tables showing the gray scale characteristics in the present invention. FIG. 4 is a block diagram of a display device of the present invention. FIG. 5 is a block diagram of a display device of the present invention. FIG. 6 is an internal block diagram of the row driver of FIG. 5. FIG. FIG. 7 is a block diagram of a display device of the present invention. FIG. 8 is a block diagram of a display device of the present invention. FIG. 9 is a block diagram of a display device of the present invention. DESCRIPTION OF SYMBOLS 10 Timing controller 11 Video data 12 Synchronization signal 13 Video data 14 Control signal for row driver 15 Power supply for row driver 16 Ground 17 Row driver 18 Storage device 11 Operating voltage 17 Control signal for column driver 18 Power supply for column driver 19 Driver 20 Applied voltage at the driver side 21 LCD panel 22 Resistor 101 D / A converter 102 Image data changing device 103 Gray scale voltage 104 Table value

2185-6089-PF (N2) .ptd Page 16

Claims (1)

1246049 VI. Scope of patent application 1 · A displayed image display pressure, which is characterized by the gray-scale voltage generation voltage; change the image data to the D / A converter material and select the shadow voltage to the display device 2 · A kind of displayed image display pressure, which is characterized by the gray-scale voltage to generate voltage; the image data D / A converter corresponding to the voltage change of the image data, the selection and the shadow voltage to the display device 3 · If applying for the special secondary school, the The driving circuit of the timing control stage 'inputs the image data rotated by the timing controller and outputs the electric power to the display device, including: generating device, which is only connected to the ground and the power source, and generates the image function of the gray-scale driver circuit. Voltage-corresponding image data; and inputting the gray-scale voltage and the changed image data ^ [After the material corresponds to the gray-scale voltage, it acts as a driving circuit for the function 5 'input from the timing controller. After the image data is output to the display device, the electric power generation device is included, and it is only connected to the ground and the power supply to generate a grayscale device, so that the image data Change to the data; and input and output the grayscale voltage corresponding to the grayscale voltage and the changed image image data with. 4 is the driving circuit of the display device of the second range of the function, which includes the image data changing device. 〃 2185-6089-PF (N2) .ptd