JP6429282B2 - High analysis display and its driver chip - Google Patents

Description

  The present invention relates to a high analysis display, and more particularly to a driver chip applied to a high analysis display.

  With the rapid development of industry, digital tools such as mobile phones, digital cameras, notebook computers, desktop computers, etc. are developing more convenient, more multifunctional and more beautiful. What is indispensable for the display screens of these electronic products is an interface, and the display screens of the above-mentioned products bring the convenience of many operations to the user. With the development of image processing technology, it is necessary to improve the analysis level of the display screen so that the image can be fully exhibited, and products with a 5K resolution level are now appearing.

  The internal circuit design of the high resolution display is complicated and the required voltage range has various forms. Therefore, various voltage forms are required when operating the driver chip of the high analysis display. In the conventional technology, in order to provide various voltage forms to the driver chip, a large number of capacitors are installed on a flexible printed circuit (FPC) to increase the voltage and supply the module to the driver chip internal module.

  The main object of the present invention relates to a driver chip that receives a voltage supplied by a mother board and drives a display panel, and also relates to a high-analysis display that eliminates the need for a capacitor on a flexible printed circuit board and reduces the cost of the display. .

In order to achieve the above-described object, a driver chip provided by a driving circuit for a high analysis display according to the present invention includes a gate electrode driving module and a source electrode driving module.
The gate electrode driving module is connected to a display panel, and the gate electrode driving module emits a plurality of scanning signals and scans the display panel by a plurality of scanning lines.
The source electrode driving module is connected to the display panel, and the source electrode driving module drives the display panel via a plurality of data lines.
The source electrode driving module is connected to a motherboard through a flexible printed board , receives a positive voltage and a negative voltage generated by the motherboard, and generates a plurality of source electrode signals to the display panel.

The high analysis display provided by the driving circuit for the high analysis display according to the present invention includes a display panel.
The display panel has a plurality of data lines and a plurality of scanning lines.
The display has a driver chip and a motherboard.
The driver chip includes a source electrode driving module and a gate electrode driving module. The source electrode driving module is connected to the data lines, and the gate electrode driving module is connected to the scan lines.
The motherboard generates a positive voltage and a negative voltage, the motherboard is connected to the driver chip through a flexible printed circuit board , the source electrode driving module receives a positive voltage or a negative voltage, and receives the plurality of source electrode signals. The gate electrode driving module generates a plurality of scanning signals and scans the display panel to display a screen.

  The driver chip of the present invention can receive the voltage supplied by the motherboard and drive the display panel. This eliminates the need for a capacitor on the flexible printed circuit board of the high-analysis display, thereby reducing the cost of the display. it can.

It is a schematic diagram of a first embodiment of the driver chip of the present invention. It is a schematic diagram of one Embodiment in the high analysis display of the driver chip of this invention. It is a schematic diagram of 2nd embodiment of this invention driver chip. It is a schematic diagram of 3rd embodiment of this invention driver chip.

  The technical contents, structural features, objects to be achieved, and operational effects of the present invention will be described in detail below with reference to examples and drawings.

FIG. 1 is a schematic view of a first embodiment of the driver chip of the present invention. As shown in the figure, the driver chip 2 of the present invention includes gate electrode driving modules 22 and 24 and a source electrode driving module 30.
The gate electrode driving modules 22 and 24 are connected to the display panel 1 and emit a plurality of scanning signals. The scanning signal scans the display panel 1 through a plurality of scanning lines SL of the display panel 1.
Similarly, the source electrode driving module 30 is connected to the display panel 1 and drives the display panel 1 via the plurality of data lines DL of the display panel 1.

Further, the driver chip 2 is further connected to the mother board 4. The motherboard 4 generates a positive voltage VSP, a negative voltage VSN, a scanning voltage VGH, and a cut-off voltage VGL.
The source electrode driving module 30 is connected to the mother board 4 through the flexible printed circuit board , receives the positive voltage VSP and the negative voltage VSN, makes the source electrode input voltage, and generates a plurality of source electrode signals. The source electrode signal drives the display panel 1 through the data line DL. The source electrode input voltage level of the source electrode driving module 30 is equal to the level of the positive voltage VSP or the negative voltage VSN.
The gate electrode driving modules 22 and 24 are connected to the mother board 4 and directly transmitted to the scanning voltage VGH and the cut-off voltage VGL driver chip 2 generated by the mother board 4. Therefore, the gate electrode driving modules 22 and 24 directly receive the scanning voltage VGH and generate a scanning signal. The scanning signal further scans the display panel 1 via the scanning line SL, or directly receives the cut-off voltage VGL, and stops the scanning of the display panel 1.
Therefore, the mother board 4 of the present invention directly generates a voltage required by the driver chip 2 and directly outputs it to the driver chip 2. Thus, according to the present invention, it is not necessary to generate the voltage required by the driver chip 2 by the capacitor installed on the flexible printed circuit board, so that the display cost can be reduced.

The driver chip 2 of the present invention directly supplies the positive voltage VSP, the negative voltage VSN, the scanning voltage VGH, and the cut-off voltage VGL generated by the mother board 4 to the source electrode driving module 30 and the gate electrode driving modules 22 and 24. A signal and a scanning signal are generated on the display panel 1 to display a screen.
Therefore, even in the high-analysis display panel 1, the voltage generated by the motherboard 4 is directly supplied to the source electrode driving module 30 and the gate electrode driving modules 22 and 24. There is no need to generate the various voltages required. Thus, the present invention can reduce the cost of the display and reduce the layout area.

As shown in FIG. 1, the driver chip 2 further includes a selection circuit 40, a reference voltage circuit 42, a digital module 44, and other circuits 50.
The selection circuit 40 is connected to the reference voltage circuit 42 and the motherboard 4 and receives the reference voltage VIN generated by the reference voltage circuit 42 and the supply voltage VCC generated by the motherboard 4. The digital module 44 is connected to the selection circuit 40 and receives the power supply voltage VD. The reference voltage circuit 42 is a voltage regulator (LDO).
Based on the supply voltage VCC and the reference voltage VIN, the selection circuit 40 sets one of them as the power supply voltage VD.
Similarly, the other circuit 50 can directly receive the supply voltage VCC, the voltage VCI, the positive voltage VSP, or the negative voltage VSN. The other circuit 50 in the embodiment of the present invention is a protection circuit for the driver chip 2 or a timing controller. In addition, other voltages required by the other circuit 50 are generated directly by the mother board 4 in the same manner, but the operation method is not described here.

  The digital module 44 inside the driver chip 2 of the present invention is driven by the power supply voltage VD. The power supply voltage VD is equal to or higher than the supply voltage VCC of the selection circuit 40 selection motherboard 4 supply and the reference voltage VIN generated by the reference voltage circuit 42. If the requirements of the digital module 44 are met, the digital module 44 receives the supply voltage VCC generated by the motherboard 4 and drives the display panel 1. If not, the reference voltage VIN is received and the display panel 1 is driven.

FIG. 2 is a schematic diagram of an embodiment of the high analysis display of the driver chip of the present invention. As shown in the figure, a flexible printed circuit board 3 is further provided between the driver chip 2 and the mother board 4. The motherboard 4 is connected to the driver chip 2 through the flexible printed circuit board 3, and the positive voltage VSP, the negative voltage VSN, the scanning voltage VGH, the cut-off voltage VGL, and the supply voltage supplied by the motherboard 4 are transmitted through the flexible printed circuit board 3. It is transmitted to the driver chip 2. However, it is not necessary to install a capacitor member on the flexible printed circuit board 3.
The mother board 4 further includes a control circuit 5. The control circuit 5 controls the selection circuit 40 and controls the level of the power supply voltage VD received by the digital module 44.
After determining whether the supply voltage VCC is lower or higher than the threshold voltage, the control circuit 5 can control the switching of the selection circuit 40 to determine the power supply voltage VD.
For example, when the supply voltage VCC is lower than the threshold voltage, the control circuit 5 controls the selection circuit 40 to output the supply voltage VCC to the digital module 44. When the supply voltage VCC is higher than the threshold voltage, the control circuit 5 The circuit 5 controls the selection circuit 40 and outputs the reference voltage VIN to the digital module 44.
Similarly, the control signal of the control circuit 5 is transmitted to the driver chip 2 by the flexible printed circuit board 3.

FIG. 3 is a schematic view of a second embodiment of the driver chip of the present invention. As shown in the figure, the driver chip 2 has a charge pump 60. The charge pump 60 has at least one capacitor 70 and receives a positive voltage VSP and a negative voltage VSN supplied from the motherboard 4.
The charge pump 60 generates the scan voltage VGH and the cut-off voltage VGL using the positive voltage VSP and the negative voltage VSN, whereby the gate electrode voltage modules 22 and 24 receive the scan voltage VGH and generate a scan signal. The display panel 1 is scanned and the cut-off voltage VGL is received, and the scanning of the display panel 1 is stopped. Therefore, in the present embodiment, the levels of the scanning voltage VGH and the cut-off voltage VGL generated by the charge pump 60 are not equal to the levels of the positive voltage VSP and the negative voltage VSN.

The mother board 4 further includes a power circuit. The power supply circuit generates a plurality of power supply voltages. A scanning voltage VGH and a cut-off voltage VGL are generated by a plurality of power supply voltages. Therefore, on the mother board 4, the scanning voltage VGH and the cut-off voltage VGL can be used not only for generating the positive voltage VSP and the negative voltage VSN but also for generating other power supply circuits or other voltage circuits.
Therefore, the present invention does not limit the generation method of the scanning voltage VGH and the cut-off voltage VGL.

In the present invention, a plurality of capacitors 70 and 72 are added to the driver chip. However, the driver chip 2 can selectively use the voltage supplied from the motherboard 4. However, if the motherboard 4 supplies only the positive voltage VSP and the negative voltage VSN, the capacitors 70 and 72 are charged based on the positive voltage VSP and the negative voltage VSN through the charge pump 60, and the scanning voltage VGH and the cutoff voltage are charged. VGL is provided to the gate electrode driving modules 22 and 24.
In addition, since the power consumption of the gate electrode driving modules 22 and 24 is lower than that of the source electrode driving module 30 when applied to a high-analysis display, the charge pump 60 does not need to use large capacitors 70 and 72. . In addition, the capacitors 70 and 72 are directly installed on the driver chip 2 and do not need to be installed on the flexible printed circuit board 3.

In summary, the driver chip of the present invention has a gate electrode driving module and a source electrode driving module, and the source electrode driving module generates a source electrode input voltage required by the source electrode signal and is provided by the motherboard. Supply voltage and negative voltage. The gate electrode driving module directly uses the motherboard to provide a scanning voltage and a cutoff voltage and generate a scanning signal. Alternatively, the positive voltage and negative voltage generated by the motherboard are charged through a charge pump to generate a scan voltage and a cut-off voltage.
This eliminates the need for capacitors on the flexible printed circuit board, thus reducing the cost of the display.
The driver chip further includes a digital module in addition to the gate electrode driving module and the source electrode driving module. The power supply voltage required by the digital module is selected by the selection circuit from the supply voltage of the motherboard and the reference voltage supplied by the reference voltage circuit, and when the supply voltage is excessively high, the digital module cannot be operated normally. To do.
The present invention directly uses the voltage generated by the motherboard and supplies it as various voltages required by the driver chip, so that it is not necessary to install the capacitor on the flexible printed circuit board. Cost can be reduced.

  The above-described embodiments are merely illustrative of the principle of the present invention and its effects, and do not limit the present invention. Thus, modifications or changes that can be made to the above-described embodiments by those having ordinary knowledge in the technical field to which the present invention pertains do not depart from the spirit of the present invention. The present invention already has industrial applicability, novelty and inventive step, and meets the requirements of patents.

DESCRIPTION OF SYMBOLS 1 Display panel 2 Driver chip 22 Gate pole drive module 24 Gate pole drive module 3 Flexible printed circuit board 30 Source pole drive module 4 Mother board 40 Selection circuit 42 Reference voltage circuit 44 Digital module 5 Control circuit 50 Other circuit 60 Charge pump 70 Condenser 72 Condenser DL data line SL scan line VCC supply voltage VCI voltage VD power supply voltage VGH scan voltage VGL cut-off voltage VIN reference voltage VSN negative voltage VSP positive voltage

Claims (13)

A driver chip having a gate electrode driving module and a source electrode driving module;
The gate electrode driving module is connected to a display panel, the gate electrode driving module emits a plurality of scanning signals, scans the display panel through a plurality of scanning lines,
The source electrode driving module is connected to the display panel, and the source electrode driving module drives the display panel through a plurality of data lines,
The source electrode driving module is connected to the motherboard through a flexible printed circuit board, and receives a positive voltage and a negative voltage the motherboard occurs, and originating a plurality of source electrode signals to the display panel,
The flexible printed circuit board is not provided with a capacitor member,
The mother board does not need to generate the positive voltage and the negative voltage received by the driver chip by installing the capacitor member on the flexible printed circuit board . The motherboard further generates a scanning voltage and a cutoff voltage,
The gate electrode driving module receives the scanning voltage and issues the scanning signals.
2. The scanning signal is scanned through the scanning lines, and the gate electrode driving module receives the cutoff voltage and stops scanning the display panel. Driver chip as described in The motherboard generates the positive voltage or the negative voltage, outputs it to the input terminal of the source electrode driving module, and sets it as the source electrode input voltage of the source electrode driving module,
The level of the source electrode input voltage is equal to the level of the positive voltage or the level of the negative voltage, the positive voltage and the negative voltage are further used to generate a scanning voltage and a cut-off voltage, The scanning voltage is received, and the scanning signals are emitted. The scanning signals scan the display panel through the scanning lines. The gate electrode driving module receives the cut-off voltage. 2. The driver chip according to claim 1, wherein scanning of the panel is stopped, and the level of the scanning voltage and the level of the cutoff voltage are not equal to the level of the positive voltage and the level of the negative voltage. The driver chip has a charge pump and at least one capacitor;
The charge pump is connected between the mother board and the gate electrode driving module, and the charge pump uses the capacitor to increase the level of the positive voltage and the level of the negative voltage, and the scan voltage and the 4. The driver chip according to claim 3, wherein a cutoff voltage is generated and supplied to the gate electrode driving module. The driver chip further includes a selection circuit, a reference voltage circuit, and a digital module,
The digital module is connected to the selection circuit, receives a power supply voltage, controls the display panel,
The selection circuit is connected to the motherboard and the reference voltage circuit, and the selection circuit determines the supply voltage or the reference voltage generated by the reference voltage circuit based on the supply voltage generated by the motherboard as the power supply voltage of the digital module. The driver chip according to claim 2, wherein the driver chip is determined and output to the digital module. The control circuit of the motherboard is connected to the selection circuit,
If the supply voltage is lower than a threshold voltage, the control circuit controls the selection circuit and outputs the supply voltage to the digital module;
6. The driver chip according to claim 5, wherein if the supply voltage is higher than the threshold voltage, the control circuit controls the selection circuit and outputs the reference voltage to the digital module. The high analysis display has a display panel,
  The display panel has a plurality of data lines and a plurality of scanning lines, and the display has a driver chip and a motherboard,
  The driver chip includes a source electrode driving module and a gate electrode driving module, the source electrode driving module is connected to the data lines, and the gate electrode driving module is connected to the scanning lines.
  The motherboard generates a positive voltage and a negative voltage, the motherboard is connected to the driver chip through a flexible printed circuit board, the source electrode driving module receives the positive voltage and the negative voltage, and a plurality of source electrode signals The gate electrode driving module generates a plurality of scanning signals, scans the display panel, displays a screen,
The flexible printed circuit board is not provided with a capacitor member,
The high-analysis display according to claim 1, wherein the motherboard does not need to generate the positive voltage and the negative voltage received by the driver chip by installing the capacitor member on the flexible printed board. The motherboard further generates a scanning voltage and a cutoff voltage,
  The gate electrode driving module receives the scanning voltage and issues the scanning signals.
  Each scanning signal scans the display panel via each scanning line,
  The high analysis display according to claim 7, wherein the gate electrode driving module receives the cut-off voltage and stops scanning the display panel. The motherboard generates the positive voltage or the negative voltage, outputs it to the input terminal of the source electrode driving module, and sets it as the source electrode input voltage of the source electrode driving module,
  The source electrode input voltage level is equal to the positive voltage level or the negative voltage level,
  The positive voltage and the negative voltage are further used for generating a scanning voltage and a cutoff voltage,
  The gate electrode driving module receives the scanning voltage and the cut-off voltage, and starts scanning the display panel through each scanning line, or stops scanning,
  The high-analysis display according to claim 7, wherein the scanning voltage level and the cutoff voltage level are not equal to the positive voltage level and the negative voltage level. The driver chip has a charge pump and at least one capacitor;
  The charge pump is connected between the mother board and the gate electrode driving module, and the charge pump uses the capacitor to increase the level of the positive voltage and the level of the negative voltage, and the scan voltage and the The high-analysis display according to claim 9, wherein a cut-off voltage is generated and supplied to the gate electrode driving module. The driver chip further includes a selection circuit, a reference voltage circuit, and a digital module,
  The digital module is connected to the selection circuit, receives a power supply voltage, controls the display panel,
  The selection circuit is connected to the motherboard and the reference voltage circuit, and the selection circuit determines the supply voltage or the reference voltage generated by the reference voltage circuit based on the supply voltage generated by the motherboard as the power supply voltage of the digital module. The high-analysis display according to claim 8 or 9, wherein the high-analysis display is determined and output to the digital module. The high analysis display further includes a control circuit,
  The control circuit is connected to the selection circuit;
  If the supply voltage is lower than a threshold voltage, the control circuit controls the selection circuit and outputs the supply voltage to the digital module;
  The high-analysis display according to claim 11, wherein if the supply voltage is higher than the threshold voltage, the control circuit controls the selection circuit and outputs the reference voltage to the digital module. The flexible printed circuit board is connected between the mother board and the driver chip, receives the positive voltage and the negative voltage, and transmits the positive voltage and the negative voltage to the driver chip. Item 9. The high analysis display according to Item 8.

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