TWI345201B - Liquid crystal panel - Google Patents

Description

1345201 April 15th, 100th, nuclear replacement 茛 6. Description of the invention: [Technical Field of the Invention] [0001] The present invention relates to a liquid crystal display panel. [Prior Art] [0002] Due to its advantages of lightness, thinness, and low power consumption, the liquid crystal display panel is widely used in modern information equipment such as televisions, notebook computers, mobile phones, and personal digital assistants. At present, the application of the liquid crystal display panel TV market is becoming more and more important. Please refer to FIG. 1, which is a schematic diagram of a prior art liquid crystal display panel. The liquid crystal display panel 1 includes a display module 11, a plurality of driving chips 10, and a flexible printed circuit (FPC) 12. The driving chip 10 includes a plurality of first reference voltage terminals 111, a plurality of second reference voltage terminals 113, a plurality of first voltage followers 110, a plurality of second voltage followers 112, an input terminal 114, and a complex output terminal 115. The first reference voltage terminal 111 is coupled to the first voltage follower terminal 110 for providing a high reference voltage to the first voltage follower terminal 110. The second reference voltage terminal 113 is coupled to the second voltage follower 112 for providing a low reference voltage to the second voltage follower 112. The flexible circuit board 12 is used to supply a voltage to the input terminal 11 of the drive wafer 10. The driver chip 10 outputs a complex signal to the display module 11 via the output terminal 115, thereby causing the display module 11 to display an image. [0005] Generally, the first voltage follower end 110 of the driving chip 10 is connected to the first reference voltage terminal 111, the second voltage follower terminal 11 2 is connected to the second reference voltage terminal 113, and the input terminal 114 is After the flexible circuit board 12 is connected, the two voltage followers 110, 112 and the input terminal 114 095143005 are determined. Form No. A0101 Page 4 of 18 Page 1003130888-0 100 April 15 Pressing the replacement page 1345201 I The voltage of l determines the specific function of the driver chip 10. Generally, in the manufacturing process of the liquid crystal display panel 1, the specific function of the driving wafer 10 needs to be changed according to the needs of the customer, that is, the voltages of the voltage followers 110, 112 and the input terminal 114 of the driving wafer 10 are changed. Typically the voltage at the input 114 can be changed by software. However, the voltage of the two voltage followers 110, 112 cannot be changed, so that the specific function of the driver chip 10 cannot be changed, thereby causing the liquid crystal display panel 1 to be reworked, resulting in waste of cost. Therefore, when the specific function of the driving wafer 10 of the liquid crystal display panel 1 is changed, the cost is high. SUMMARY OF THE INVENTION [0006] In view of the above, it is necessary to provide a liquid crystal display panel that is less expensive when changing the specific function of driving a wafer. A liquid crystal display panel includes a display module, a driver chip, and a flexible circuit board. The driving chip includes a plurality of first voltage followers, a plurality of second voltage followers, a plurality of first reference voltage terminals, a plurality of second reference voltage terminals, an input terminal, a complex output terminal, a plurality of first control circuits, and a plurality of second controls Circuit. The two reference voltage terminals are used to respectively provide a reference voltage for the two voltage followers. The output is used to output a signal to the display module. The flexible circuit board is used to provide a voltage to the input of the drive chip. When the liquid crystal display panel is in operation, the first reference voltage terminal provides a high voltage to the first voltage follower end, and the second reference voltage terminal provides a low voltage to the second voltage follower end; when the first need to be changed When the voltage follows the voltage of the second voltage follower terminal, the first control circuit changes the high voltage of the first voltage follower terminal to a low voltage, and the second control circuit changes the low voltage of the second voltage follower terminal For high power 095143005 Form No. A0101 Page 5 / A total of 18 pages 1003130888-0 1345201 On April 15, 100, the nuclear replacement is acre. The driving chip of the liquid crystal display panel includes a plurality of first control circuits and a plurality of second control circuits as compared with the prior art. When it is necessary to change the specific function of the driving chip, that is, to change the voltage of the two voltage follower terminals, an electrostatic discharge generator suddenly releases a very high voltage to the two reference voltage terminals. The two control circuits can respectively disconnect the two voltage follower terminals and the two reference voltage terminals, and respectively change the voltage of the first voltage follower terminal and the voltage of the second voltage follower terminal. Thereby, the specific function of the driving chip of the liquid crystal display panel is changed, and the liquid crystal display panel is not reworked, so the cost is low. [Embodiment] [0009] Please refer to Fig. 2, which is a schematic view of a preferred embodiment of a liquid crystal display panel of the present invention. The liquid crystal display panel 2 includes a display module 21, a plurality of driving chips 20, and a flexible circuit board 22. The driving chip 20 includes a plurality of first voltage followers 210, a plurality of second voltage followers 212, a plurality of first reference voltage terminals 211, a plurality of second reference voltage terminals 213, an input terminal 214, a complex output terminal 215, and a plurality of first The control circuit 216 and the plurality of second control circuits 217. The first reference voltage terminal 211 supplies a high voltage to the first voltage follower terminal 210 via the first control circuit 216. The second reference voltage terminal 213 provides a low voltage to the second voltage follower 212 via the second control circuit 217. [0010] The flexible circuit board 22 is used to provide a voltage to the input terminal 214 of the drive wafer 20. The driver chip 20 outputs a complex signal to the display module 21 via the output terminal 215, thereby causing the display module 21 to display an image. [0011] 095143005 Please refer to FIG. 3 together, which is a schematic circuit diagram of the first control circuit 216. Form No. A0101 Page 6 of 18 1003130888-0 1345201 _— 'April 15th, 2014, the first control circuit 21 6 includes a first resistor 260, a second resistor 261, and a third The resistor 262, a first switch 263, a first protection circuit 264 and a second protection circuit 265. The two protection circuits 264, 265 are both used to prevent components (not shown) connected thereto from being burned out. [0012] The first protection circuit 264 is connected to the first voltage follower terminal 21A. The first voltage follower terminal 210 is connected to the first reference voltage terminal 211 ' via the first resistor 260 and is also grounded via the second resistor 261. The first reference voltage terminal 211 is sequentially connected to the input terminal 214 via the third resistor 262 and the second protection circuit 265 . The first switch 263 is connected in parallel to the two ends of the third resistor 262. [0013] The first resistor 260 is very thin, and the material thereof is indium tin (indium tin)

Oxide, ITO) or indium zinc oxide (IZO), which is easily blown when applied with a high voltage. The third resistor 262 is wider and its material is Silicon (Si) or Amorphous-Silicon (a_Si), so that it is not easily blown when a high voltage is applied.

[0014] Please refer to FIG. 4 together, which is a schematic circuit diagram of the second control circuit 217. The second control circuit 217 includes a fourth resistor 27A, a fifth resistor 271, a sixth resistor 272, a second switch 273, a third protection circuit 274, and a fourth protection circuit 275. The third protection circuit 274 and the fourth protection circuit 275 are both used to prevent the component (not shown) connected thereto from being burned. The positive-gap triple protection circuit 274 is connected to the second voltage follower terminal 212. The first battery follower end 212 is connected to the second reference 095143005 via the fourth resistor 270. Form No. A0101 Page 7 / 18 pages 1003130888-0 1345201 On April 15, 100, the replacement page 'voltage terminal 213, also Connected to the input terminal 214 via the fifth resistor 271. The second reference voltage terminal 213 is grounded via the sixth resistor 272 and the fourth protection circuit 275 in sequence. The second switch 273 is connected in parallel to the two ends of the sixth resistor 272. [0016] The fourth resistor 270 is very thin, and its material is indium zinc oxide or indium tin oxide, so that it is easily blown when a high voltage is applied. The sixth resistor 272 is wider and has a material of germanium or amorphous germanium so that it cannot be easily blown when a high voltage is applied.

[0017] The working principle of the liquid crystal display panel 2 is as follows:

[0018] When the liquid crystal display panel 2 is normally operated, the first switch 263 and the second switch 273 are both turned on, and the flexible circuit board 22 inputs a high voltage to the input end 214 of the driving chip 20, and the input end The high voltage is output to the first reference voltage terminal 211 via the second protection circuit 265 and the first switch 263, and the first reference voltage terminal 211 supplies the high voltage to the first voltage via the first resistor 260. Follow the end 210. At the same time, the ground voltage is supplied to the second reference voltage terminal 213 via the fourth protection circuit 275 and the second switch 273, and the second reference voltage terminal 213 supplies the ground voltage to the ground via the fourth resistor 270. The second voltage follows the end 212. Therefore, the first voltage follower terminal 210 is a high voltage and the second voltage follower terminal 212 is a low voltage. [0019] When it is necessary to change the specific function of the driving chip 20, the first switch 263 and the second switch 273 are both turned off, and an electrostatic discharge (Electro-Static Discharge (ESD) generator is suddenly released. Voltage to the two reference voltage terminals 211, 213, the voltage burns 095143005 Form No. A0101 Page 8 / Total 18 pages 1003130888-0 1345201

The first resistor 260 and the fourth resistor 270 are disconnected from the first resistor 260 and the second resistor 265, and are also discharged via the third resistor 262 and the second protection circuit 265 through the sixth resistor 272 and the fourth The protection circuit 275 is released. Since the first voltage follower 210 is grounded via the second resistor 261, the voltage of the first voltage follower terminal 210 is zero after the first resistor 260 is blown. The second voltage follower terminal 212 is connected to the wheel terminal 214 via the fifth resistor 271. Therefore, after the fourth resistor 270 is blown, the input terminal 214 provides a high voltage to the second voltage follower terminal 212. The first voltage follower terminal 21 is changed to a low voltage 'the second voltage follower terminal 212 is changed to a high voltage. The driving wafer 20 of the liquid crystal display panel 2 includes a plurality of first control circuits 216 and a plurality of second control circuits 217. When it is necessary to change the specific function of the driving chip 20, that is, to change the voltage of the two voltage followers 21, 212, an electrostatic discharge generator is used to suddenly release a very high voltage to the two reference voltage terminals 211, 213. The two control circuits 216, 217 can respectively disconnect the two voltage followers 210, 212 and the two reference voltage terminals 211, 213 ' and change the voltage of the first voltage follower terminal 21 to a low voltage, the second The voltage following the voltage of the terminal 212 changes to a high voltage. By changing the specific function of the driving chip 20 of the liquid crystal display panel 2, the liquid crystal display panel 2 is not reworked, and the cost is low. [Caf 1] In summary, the disc of the present invention has met the requirements of the invention patent, and the patent application is filed according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or changes in accordance with the spirit of the present invention. It should be covered by the following patent application. [Simple description of the drawing] 095143005 Form No. A0101 1003130888-0 Page 9 of 18 1345201 April 15th, 2014 Shuttle replacement page '[0022] _1 is a schematic diagram of a prior art liquid crystal display panel. 2 is a schematic view of a preferred embodiment of a liquid crystal display panel of the present invention. 3 is a circuit schematic diagram of a first control circuit of the liquid crystal display panel shown in FIG. 2. 4 is a circuit schematic diagram of a second control circuit of the liquid crystal display panel shown in FIG. 2. [Main component symbol description] [0026] Liquid crystal display panel: 1, 2 [0027] Driving wafer. 10, 20 [0028] Display module: 11, 21 [0029] Flexible circuit board: 12, 22 [0030] First voltage Follower: 110, 210 [0031] First reference voltage terminal: 111, 211 [0032] Second voltage follower: 112, 212 [0033] Second reference voltage terminal: 113, 213 [0034] Input: 114, 214 [0035] Output: 115, 215 [0036] First control circuit: 216 [0037] Second control circuit: 217 [0038] First resistance: 2 6 0

095143005 Form No. A0101 Page 10 of 18 1003130888-0 1345201

[0040] [0049] [0049] [0049] [0049] Second resistor: 2 6 1 Third resistor: 262 First switch: 263 First protection circuit: Second protection circuit: Fourth resistance: 270 Fifth resistance: 2 71 Sixth resistance: 272 Second switch: 273 Third protection circuit: Fourth protection circuit: 264 265 274 275 100 April 15 Japanese nuclear replacement page

095143005 Form No. A0101 Page 11 of 18 1003130888-0

Claims (1)

1345201 100年年月15曰7, application patent scope: I. A liquid crystal display panel, comprising: a display module; a driving chip, comprising a plurality of first voltage followers, a plurality of second voltage followers, a plurality first a reference voltage terminal, a plurality of second reference voltage terminals, an input terminal, a plurality of wheel terminals, a plurality of first control circuits, and a plurality of second control circuits 'the two reference voltage terminals are respectively used to provide a reference voltage for the two voltage followers The round output terminal is configured to output a signal to the display module. When the liquid crystal display panel is in operation, the first reference voltage terminal provides a high voltage to the first voltage follower terminal, and the second reference voltage terminal provides a low voltage voltage The second voltage following end; when it is required to change the voltage of the first voltage follower and the second voltage follower, the first control circuit changes the voltage between the first voltage follower to a low voltage, the second The control circuit changes the low voltage of the second voltage follower terminal to a high voltage; and a flexible circuit board for supplying a voltage to the input terminal of the driver chip. The liquid crystal display panel of claim 1, wherein the first control circuit comprises a first resistor and a second resistor, and the first voltage follower is connected to the first resistor and the first reference voltage terminal. To the wheel end, it is also grounded via the second resistor. 3. The liquid crystal display panel of claim 2, wherein the material of the first resistor is indium tin oxide or indium zinc oxide. 4. The liquid crystal display panel of claim 2, wherein the first control circuit further comprises a -th protection circuit, the first protection circuit being connected to the first voltage follower. 5. The liquid crystal display panel according to claim 2, wherein when the 095143005 form number Α0101 page 12/18 pages 1003130888-0 1345201 100 April 15, the replacement page liquid crystal display panel works The flexible circuit board inputs a high voltage to the input end of the driving chip, and the input terminal supplies the high voltage to the first reference voltage terminal, and the first reference voltage terminal supplies the high voltage to the first reference voltage terminal to the first resistor The first voltage follower end; when it is required to change the voltage of the first voltage follower end and the second voltage follower end, an electrostatic discharge generator is used to suddenly release a voltage to the first reference voltage terminal, and the voltage blows the first A resistor, the voltage of the first voltage follower terminal is zero. The liquid crystal display panel of claim 4, wherein the first control circuit further comprises a first switch, a third resistor and a second protection circuit, wherein the first voltage reference terminal is via the first The three resistors and the second protection circuit are connected to the input end, and the first switch is connected in parallel to the two ends of the third resistor. 7. The liquid crystal display panel of claim 6, wherein the material of the third resistor is tantalum or amorphous germanium. 8. The liquid crystal display panel of claim 6, wherein the second control circuit comprises a fourth resistor and a fifth resistor, the second voltage follower end via the fourth resistor and the second The reference voltage terminal is grounded and is also connected to the input terminal via the fifth resistor. 9. The liquid crystal display panel of claim 8, wherein the material of the fourth resistor is indium tin oxide or indium zinc oxide. The liquid crystal display panel of claim 8, wherein the second control circuit further comprises a third protection circuit, the third protection circuit being coupled to the first voltage follower. The liquid crystal display panel of claim 8, wherein when the liquid crystal display panel is in operation, a ground voltage is supplied to the second reference voltage 095143005, and the second reference voltage terminal is connected to the fourth resistor The ground voltage is supplied as the form number A0101, page 13 / 18 pages 1003130888-0 1345201 _ 100 years of April 15th, the shuttle is replacing w· to the second voltage follower; when the first voltage follower needs to be changed When the voltage of the second voltage follows the terminal, an electrostatic discharge generator suddenly releases a voltage to the second reference voltage terminal, and the voltage blows the fourth resistor, and the input terminal supplies a high voltage to the second voltage follower terminal. The liquid crystal display panel of claim 10, wherein the second control circuit further comprises a second switch, a sixth resistor and a fourth protection circuit, wherein the second voltage reference terminal is The sixth resistor and the fourth protection circuit are grounded, and the switch is connected in parallel to the two ends of the sixth resistor. The liquid crystal display panel of claim 12, wherein the material of the sixth resistor is tantalum or amorphous germanium. 095143005 Form No._々0101 Page 14 of 18 1003130888-0