TWI406216B - Voltage writing device and method - Google Patents

Abstract

A voltage writing method for writing a voltage into a driving circuit driving a display panel is provided herein. The voltage writing method includes following steps: firstly, confirming whether the driving circuit type corresponding with a predetermined type. If the driving circuit type is corresponding with the predetermined type, an enable signal is generated; displaying a testing frame on the display panel; varying the voltage provided to the driving circuit to adjust the testing frame similar to a standard frame; and writing the varied voltage into the driving circuit. Furthermore, a voltage writing device is also disclosed herein.

Description

Voltage writing device and voltage writing method

The present invention relates to a voltage writing device and method, and more particularly to a voltage writing device and method for a display driving circuit.

In addition to providing home entertainment functions, flat-panel displays can also serve as a medium for educational propaganda. Therefore, flat-panel displays have been widely integrated into the daily lives of the public. However, when the display panel is displaying a screen, the screen flicker usually occurs. One of the reasons for such a screen flicker is that the manufacturing process of the display panel is different, resulting in a voltage difference between the high-level common voltage and the low-level common voltage required by different display panels.

However, conventionally used to adjust the aforementioned voltage difference requires simultaneous connection of a plurality of bulky devices, such as a computer and a power supply, so that it takes up a lot of space. On the other hand, the computer needs to download a specific software related to adjusting the voltage difference, and it is necessary to input a plurality of parameter values into the computer to start the adjustment of the voltage difference, thereby consuming a lot of manpower.

In view of the above, it is necessary to provide a voltage writing device and method that can write an appropriate voltage to its driving circuit in accordance with the difference in display panels.

Therefore, in one aspect of the present invention, a voltage writing device that is easy to operate and carry is provided to write a voltage to a driving circuit of a display panel. To improve the quality of the display panel.

According to an embodiment of the present invention, a voltage writing device having a model confirming unit, a screen generating unit, a voltage control unit, and a voltage writing unit is provided. The model confirmation unit can confirm whether the model of the drive circuit conforms to a preset model. When the model of the drive circuit conforms to the preset model, an enable signal is issued, and the screen generation unit displays a test screen on the display panel. The voltage control unit changes the voltage value supplied to the driving circuit according to the enable signal, so that the test screen is adjusted to the standard screen. The voltage writing unit can be used to write the changed voltage value to the driving circuit.

Further, another aspect of the present invention is to provide a voltage writing method which can write a voltage to a driving circuit of a display panel to improve the image quality of the display panel.

According to another embodiment of the present invention, a voltage writing method is provided. The voltage writing method has the following steps: first confirming whether the model of the driving circuit conforms to a preset model, and when the model of the driving circuit conforms to a preset model, The uniformity signal; displaying the test screen on the display panel; then changing the voltage value supplied to the driving circuit according to the enable signal to adjust the test screen to the standard screen; and then writing the changed voltage value to the driving circuit.

It should be noted that the driving circuit in the first embodiment and the second embodiment is a wafer embedded in a one-time programmable (OTP) non-volatile memory. The OTP non-volatile memory can make the driving circuit more conform to the requirements of the display panel through the writing operation shown in the first embodiment and the second embodiment, and The life cycle of the display panel has been extended.

Referring to FIG. 1, there is shown a functional block diagram of a voltage writing device in accordance with a first embodiment of the present invention.

The voltage writing device 100 provided in the first embodiment has a power supply unit 110, a model confirmation unit 120, a picture generation unit 130, and a voltage control unit 140. And voltage writing unit 150. The power supply unit 110 is coupled to the model confirmation unit 120, the screen generation unit 130, the voltage control unit 140, the voltage writing unit 150, and the drive circuit 920 to supply the electrical energy required for the operation of the units and circuits. In this way, it is possible to supply the appropriate electrical energy separately according to the different electrical energy requirements of the unit and the circuit.

In addition, the model confirmation unit 120 can confirm whether the model of the driving circuit 920 conforms to a preset model. When the model of the driving circuit 920 conforms to the preset model, the enabling signal S1 is sent to the voltage control unit 140. On the contrary, if the model of the driving circuit 920 does not conform to the preset model, the model confirming unit 120 cannot enable the voltage control unit 140.

By using the model confirming unit 120 to confirm whether the model of the driving circuit 920 conforms to the preset model, the subsequent voltage writing operation is allowed when the model of the driving circuit 920 conforms to the preset model. Therefore, in the first embodiment, only the driving circuit having the preset model can perform voltage writing. If the driving circuit 920 does not have the preset model, the subsequent voltage writing operation cannot be performed.

In addition, the screen generating unit 130 of the voltage writing device 100 displays a test screen on the display panel. This test screen is, for example, a flashing picture, and the reason for the flickering of the picture is the high level common voltage and the low level common voltage. The voltage difference between them does not meet the requirements of individual display panels. Due to the difference between the individual display panels, the voltage difference between the high-level common voltage and the low-level common voltage supplied to the driving circuit should also be adjusted according to the requirements of the individual display panels.

Therefore, in this embodiment, the high-level common voltage can be varied by fixing the low-level common voltage so that the voltage difference between the two meets the requirements of the individual display panels. However, in other embodiments, the low-level common voltage can also be changed by fixing the high-level common voltage, and the voltage difference between the two can also meet the requirements of the individual display panels.

In the first embodiment, in order to reduce the degree of flicker of the screen to improve the image quality of the display panel 910, it is necessary to change the high-level common voltage value in the case where the common voltage of the low level is fixed. In this way, an appropriate high-level common voltage can be obtained according to different characteristics between the different display panels, and the voltage value can be written to the driving circuit 920.

In addition, the picture generating unit 130 may employ a component programmable gate Array (FPGA) to store and output data of the test picture.

In the first embodiment, the voltage control unit 140 of the voltage writing device 100 is enabled according to the enable signal S1 to vary the high-level common voltage value supplied to the driving circuit 920, so that the test screen is adjusted to a standard screen. . After the test screen is adjusted, the voltage writing unit 150 may write the changed high level common voltage value to the driving circuit 920.

For example, the voltage control unit 140 can control the power supply unit 110 to output a high level from the power supply unit 110 to the driving circuit. The same voltage value changes. When the voltage writing unit 150 wants to write the changed high level common voltage value to the driving circuit 920, it can also control the power supply unit 110 to output a specific set of voltages to the driving circuit. The specific voltage of this group includes a high-level gate voltage, a low-level gate voltage, a high-level common voltage, and a low-level common voltage. The writing operation is performed by transferring the set of specific voltages from the power supply unit to the driving circuit.

For example, if the high-level gate voltage required by the driver circuit during normal operation is +15V and the low-level gate voltage is -15V, the high-level gate voltage is set to be during the write operation. For example, it is +7.5V, and the low level gate voltage is set to 0V. This voltage change condition is a condition required to satisfy the writing of the high-level common voltage value to the driving circuit. However, the foregoing voltage values are merely illustrative of the operation of the voltage writing device, and the present invention is not limited thereto, and those having ordinary knowledge in the art to which the present invention pertains may change such types depending on the types of driving circuits and display panels. Voltage value.

The model confirming unit 120 of the voltage writing device 100 will be exemplarily explained below.

Referring to FIG. 2, a functional block diagram of the model confirming unit of the voltage writing device 100 of FIG. 1 is shown. In the first embodiment, the model confirmation unit 120 has a model requester 121, a determiner 123, and a first enablement module 125. By employing the model requestor 121, a request signal is issued to request the drive circuit 920 to transmit a set of model-to-model requestors 121 stored in the register, which may represent the manufacturer or batch number of the drive circuit 920.

In order to ensure that the voltage writing device can only write, for example, the driving circuit 920 manufactured by a specific manufacturer, the determiner 123 of the model confirming unit 120 can The model of the driving circuit 920 is compared with a preset model, and it is determined whether the model conforms to the preset model. The preset model has, for example, information representing a specific manufacturer. In this way, it is possible to perform subsequent voltage writing operations on the premise that the driving circuit 920 is manufactured by a specific manufacturer, and reject the driving circuit manufactured by the non-specific manufacturer by using the voltage writing device of the first embodiment. Enter the high level common voltage value.

The first enabling module 125 of the model confirming unit 120 issues an enable signal S1 when the model conforms to the preset model. For example, after confirming that the driving circuit 920 is manufactured by a specific manufacturer, the voltage control unit is enabled to change the high-level common voltage supplied to the driving circuit 920 by the enable signal S1, and the common voltage is changed at a high level. After the desired voltage value, it is written to the drive circuit.

The detailed operation of the voltage control unit in the first embodiment will be exemplarily explained below.

Please refer to FIG. 3, which is a functional block diagram of the voltage control unit of the voltage writing device of FIG. 1. The voltage control unit 140 has a voltage adjustment module 141 that can vary the high level common voltage value via the transmission interface 142. In addition, the voltage adjustment module 141 can have an adjustment switch 1415 and an adjustment switch 1417, and the user respectively increases or decreases the high-level common voltage value by manually switching the adjustment switch 1415 and the adjustment switch 1417. The adjustment switch 1415 and the adjustment switch 1417 are respectively realized by, for example, a button.

Therefore, in the first embodiment, the voltage adjustment module 141 is used and the power supply unit 110 is controlled by adjusting the switch 1415 and the adjustment switch 1417 to raise or lower the high-level common voltage value to change the voltage value. Enter And adjust to the desired voltage value. If the voltage value is written to the driving circuit of the driving circuit 920, the display panel can display the image quality of the standard picture.

On the other hand, the voltage control unit 140 also has an image capturing module 143 and a comparison module 145 in order to find the voltage value of the image quality that causes the display panel to display an approximate standard picture and write it into the driving circuit. . The image capturing module 143 can be used to capture a test picture. And the comparison module 145 compares the captured test picture with the standard picture. For example, the image capturing module can be a luminance tester, and the luminance tester will obtain the brightness value of the test picture, and then the comparison module 145 compares the brightness value of the test picture with the brightness value of the standard picture. If the difference value between the two is, for example, 2% or less, it is judged that the test picture caused by the high-level common voltage value supplied to the drive circuit 920 at this time is similar to the standard picture.

Therefore, by using the image capturing module 143 and the comparison module 145, the display parameters of the test screen and the standard screen can be automatically detected to confirm the high voltage common voltage value supplied to the driving circuit 920 at this time. When the picture is similar to the standard picture, this voltage value is written to the drive circuit 920.

However, after confirming that the test screen approximates the standard picture, the write operation is triggered to write the high level common voltage value to the drive circuit 920. In the foregoing process, the voltage control unit may selectively trigger the write operation according to the user manually switching the switch or automatically trigger the write operation via the control signal.

In the first embodiment, the voltage control unit 140 further has a write trigger switch 147 and a second enable module 149. When confirming the test screen is similar to the standard painting In the case of a face, the write trigger switch 147 will switch. After switching the write trigger switch 147, the second enable module 149 sends another enable signal S2 via the transmission interface 142 to enable the voltage write unit 150.

The voltage writing device 100 of the first embodiment can also be manually operated by an experienced user. The user can manually adjust the high-level common voltage value by comparing the test screen with the standard screen, and the user can determine the adjusted voltage. In the case where the test screen caused by the value approximates the standard picture, the write trigger switch 147 is switched by switching. The write trigger switch 147 can employ, for example, a button located on the surface of the voltage writing device 100. The user can press this button to trigger the write operation and write the voltage value at this time to the drive circuit 920.

Further, in the second embodiment of the present invention, there is provided a voltage writing method which can write a voltage to a driving circuit of a display panel.

Please refer to FIG. 4, which is a flow chart showing a voltage writing method according to a second embodiment of the present invention. The voltage writing method of this embodiment includes the steps of first confirming whether the model of the driving circuit conforms to a preset model (step 410), and when the model of the driving circuit conforms to the preset model, for example, issuing a consistent energy signal for subsequent The voltage is written to the job. On the other hand, if the model of the driving circuit 920 does not conform to the preset model, subsequent voltage writing operations cannot be performed.

And, the test screen will be displayed on the display panel (step 420). This test picture is, for example, a blinking picture, and the reason why the picture flickers is that the voltage difference between the high-level common voltage and the low-level common voltage does not meet the requirements of the individual display panels. Therefore, in this embodiment, the high-level common voltage can be changed by fixing the low-level common voltage to make the voltage difference between the two meet individual Display panel requirements. However, in other embodiments, the low-level common voltage can be changed by fixing the high-level common voltage, and the voltage difference between the two can also be matched with the requirements of the individual display panels to suppress the flickering of the screen.

Also, in the second embodiment, the high-level common voltage value supplied to the driving circuit according to the enable signal change (step 430) is performed to adjust the test picture to a standard picture. The changed voltage value is then written to the drive circuit voltage writing method (step 440).

In step 430, the high level common voltage value can be adjusted. For example, the voltage values can be respectively raised or lowered by switching the two adjustment switches, and the adjustment switches can be specifically implemented by, for example, two buttons.

In step 440, in addition to transmitting the changed high-level common voltage value to the driving circuit, a plurality of specific voltages, that is, a high-level gate voltage, a low-level gate voltage, and a low-level common voltage may be transmitted. . When the changed high-level common voltage value is to be written to the driving circuit, the specific voltages are transmitted to the driving circuit for writing.

The driving circuit, the display panel and the voltage values mentioned in steps 410 to 440 respectively require different voltage levels, so the voltage writing method further has the step of supplying electric energy to the driving circuit.

Fig. 5 is a flow chart showing the steps of confirming whether the model of the driving circuit conforms to the preset model in Fig. 4. That is, step 410 in FIG. 4 includes the step of requesting the drive circuit to transmit the model number (step 510). A request signal is sent to request drive circuit 920 to transmit a set of model-to-model requestors 121 stored in the register, which may represent the manufacturer or batch number of drive circuit 920.

In order to ensure that the voltage writing device can only write, for example, the driving circuit 920 manufactured by a specific manufacturer, the determiner 123 of the model confirming unit 120 can compare the model of the driving circuit 920 with a predetermined model. The preset model has, for example, information representing a specific manufacturer.

Next, in this embodiment, it is determined whether the model conforms to the preset model (step 520). In this way, the subsequent voltage writing operation can be performed on the premise that the driving circuit is manufactured by a specific manufacturer. And the drive circuit manufactured by the non-specific manufacturer is rejected to write any data using the voltage writing method of the second embodiment.

And, when the model conforms to the preset model, an enable signal is issued (step 530) to trigger a subsequent voltage write operation.

Figure 6 is a flow chart showing the steps of varying the voltage value supplied to the drive circuit in Figure 4. That is, step 430 of FIG. 4 may have the steps of: capturing a test image (step 610), and comparing the captured test picture with the standard picture (step 620).

For example, in step 610, a luminance tester may be employed, which will obtain the luminance value of the test picture, and then compare the luminance value of the test picture with the brightness value of the standard picture in step 620. If the difference value between the two is, for example, 2% or less, the test screen approximating standard screen caused by the high-level common voltage value supplied to the drive circuit at this time is judged.

Therefore, the voltage writing method can automatically detect the display parameters of the test screen and the standard screen by using steps 610 and 620 to confirm the test picture and standard caused by the high-level common voltage value supplied to the driving circuit at this time. In the case of a picture approximation, this voltage value is written to the drive circuit.

Then, the voltage writing method of the second embodiment further has the following steps: when the test screen approximates the standard screen, switching a write trigger switch (step 630); and after switching the write trigger switch, issuing another enable signal The changed voltage value is written to the drive circuit (step 640).

In step 640, an experienced user can also manually operate to write the changed voltage value to the driving circuit. The user can manually adjust the high-level common voltage value by comparing the test screen with the standard screen, and adjust the value. In the case where the test picture caused by the subsequent voltage value is close to the standard picture, by writing the write trigger switch, the write trigger switch can employ, for example, a button. The user can press this button to trigger the write operation and write the voltage value at this time to the drive circuit.

While the present invention has been described above with reference to the first embodiment and the second embodiment, it is not intended to limit the invention, and various modifications may be made without departing from the spirit and scope of the invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

100‧‧‧Voltage writing device

145‧‧‧Comparative Module

110‧‧‧Power supply unit

147‧‧‧Write trigger switch

120‧‧‧Model Confirmation Unit

149‧‧‧Second enabling module

121‧‧‧Model Requestor

150‧‧‧Voltage writing unit

123‧‧‧Judge

910‧‧‧ display panel

125‧‧‧First enabling module

920‧‧‧ drive circuit

130‧‧‧Screen generating unit

S1‧‧‧Enable signal

140‧‧‧Voltage Control Unit

410, 420, 430, 440, 510, 520, 530, 610, 620, 630, 640 ‧ ‧ steps

141‧‧‧Voltage adjustment module

1415‧‧‧Adjustment switch

1417‧‧‧Adjustment switch

142‧‧‧Transport interface

143‧‧‧Image capture module

The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; Block diagram.

Figure 2 is a diagram showing the type confirmation unit of the voltage writing device of Figure 1. Functional block diagram.

Fig. 3 is a functional block diagram showing a voltage control unit of the voltage writing device of Fig. 1.

4 is a flow chart showing a voltage writing method in accordance with a second embodiment of the present invention.

Fig. 5 is a flow chart showing the steps of confirming whether the model of the driving circuit conforms to the preset model in Fig. 4.

Figure 6 is a flow chart showing the steps of varying the voltage value supplied to the drive circuit in Figure 4.

100‧‧‧Voltage writing device

110‧‧‧Power supply unit

120‧‧‧Model Confirmation Unit

130‧‧‧Screen generating unit

140‧‧‧Voltage Control Unit

150‧‧‧Voltage writing unit

910‧‧‧ display panel

920‧‧‧ drive circuit

S1‧‧‧Enable signal

Claims (17)

A voltage writing device for writing a voltage to a driving circuit for driving a display panel, the voltage writing device comprising: a model confirming unit for confirming whether the type of the driving circuit is Compliance with a preset model, when the model of the driving circuit conforms to the preset model, a consistent energy signal is issued; a picture generating unit displays a test screen on the display panel; and a voltage control unit changes according to the enabling signal Supplying a voltage value to the driving circuit to adjust the test picture to a standard picture; and a voltage writing unit to write the changed voltage value to the driving circuit. The voltage writing device of claim 1, wherein the model confirming unit comprises: a model requester for requesting the driving circuit to transmit the model; and a determiner for determining whether the model meets the preset And a first enabling module for emitting the enabling signal when the model conforms to the preset model. The voltage writing device of claim 1, wherein the voltage control unit comprises: a voltage adjustment module for changing the voltage value. The voltage writing device of claim 3, wherein the voltage adjusting module comprises: two adjusting switches, respectively increasing or decreasing the voltage value by switching the adjusting switches. The voltage writing device of claim 1, wherein the voltage control unit comprises: an image capturing module for capturing the test screen; and a comparison module for comparing the captured The test screen is related to the standard screen. The voltage writing device of claim 5, wherein the voltage control unit further comprises: a write trigger switch, switching when the test screen approximates the standard screen; and a second enabling module, After switching the write trigger switch, another enable signal is issued to enable the voltage write unit. The voltage writing device of claim 1, wherein the voltage value is a high level common voltage value. The voltage writing device of claim 1, wherein when the voltage value is written to the driving circuit, the voltage writing unit sets a The high level gate voltage and a low level gate voltage are supplied to the driver circuit. The voltage writing device of claim 1, further comprising: a power supply unit for supplying power to the model confirmation unit, the screen generating unit, the voltage control unit, the voltage writing unit, and the Drive circuit. A voltage writing method for writing a voltage to a driving circuit for driving a display panel, the voltage writing method at least comprising: confirming whether the model of the driving circuit conforms to a preset model, When the model of the driving circuit conforms to the preset model, a consistent energy signal is sent; a test screen is displayed on the display panel; and a voltage value supplied to the driving circuit is changed according to the enabling signal to adjust the test screen to a standard picture; and writing the changed voltage value to the drive circuit. The voltage writing method of claim 10, wherein the step of confirming whether the model of the driving circuit conforms to the preset model comprises: requesting the driving circuit to transmit the model; determining whether the model conforms to the preset model; as well as The enable signal is issued when the model conforms to the preset model. The voltage writing method of claim 10, wherein the step of adjusting the test picture to the standard picture according to the activation signal to change the voltage value supplied to the driving circuit comprises: performing the voltage value Adjustment. The voltage writing method of claim 12, wherein the step of adjusting the voltage value comprises: respectively raising or lowering the voltage value by switching the two adjustment switches. The voltage writing method of claim 10, wherein the step of adjusting the test screen to the standard screen according to the activation signal to change the voltage value supplied to the driving circuit comprises: capturing the test image And comparing the captured test picture with the standard picture. The voltage writing method of claim 14, wherein the step of adjusting the test signal to the standard screen according to the enabling signal to change the voltage value supplied to the driving circuit further comprises: switching a write Triggering a switch when the test picture approximates the standard picture; and issuing another enable signal to cause the changed voltage value to be written to the drive circuit after switching the write trigger switch. The voltage writing method of claim 10, wherein the voltage value is a high level common voltage value. The voltage writing method of claim 10, wherein the step of writing the changed voltage value to the driving circuit comprises: setting a high level gate voltage and a low level gate voltage.