TWI557709B - Displaying device - Google Patents

Description

Display device

The present invention relates to a display technology, and more particularly to a display device.

In the increasingly fierce competition of display devices, in order to respond to consumers' demand for electronic products, thinning has become the trend of current electronic products. Display devices have followed the current trend and developed gate driver on Array (Gate driver on Array, GOA) to make the display device thinner.

When a gate array circuit is fabricated, particles are often generated in the circuit, which cause a short circuit between the lines of the gate array circuit to generate a high temperature, causing the polarizing plate to melt. In addition to reducing the overall performance of the display device, the above conditions may also affect the customer's perception of use.

A conventional solution is to place a series resistor on the line of the gate array circuit to reduce the high temperature generated by the short circuit caused by the particles. Although the above solution can avoid the melting of the polarizing plate, it will affect the signal of the gate array circuit and cause the signal distortion of the gate array circuit. Moreover, once the circuit of the gate array circuit is abnormal, there is no mechanism to immediately turn off the power of the display device, which causes the abnormality of the display device to continue, which seriously affects the customer's perception of use.

It can be seen that the above existing methods obviously have inconveniences and defects, and need to be improved. In order to solve the above problems, the relevant fields have not tried their best to find a solution, but for a long time, no suitable solution has been developed.

SUMMARY OF THE INVENTION The Summary of the Disclosure is intended to provide a basic understanding of the present disclosure. This Summary is not an extensive overview of the disclosure, and is not intended to be an

It is an object of the present invention to provide a display device whereby problems of the prior art are improved.

In order to achieve the above object, a technical aspect of the present invention relates to a display device including a display panel, a first gate array circuit, a second gate array circuit, a level shifting module, and a protection circuit. The first gate array circuit is disposed on the first side of the display panel. The second gate array circuit is disposed on the second side of the display panel, and the first side is opposite to the second side. The level shifting module is configured to provide the first signal and the second signal to the first gate array circuit and the second gate array circuit, respectively. The protection circuit is configured to receive and compare the first signal and the second signal, and generate a protection signal according to the first signal and the second signal.

The basic spirit and other objects of the present invention, as well as the technical means and implementations of the present invention, will be readily apparent to those skilled in the art of the invention.

100‧‧‧ display device

D1‧‧‧ diode

100A‧‧‧ display device

100B‧‧‧ display device

110‧‧‧ display panel

120‧‧‧First Gate Array Circuit

130‧‧‧Second gate array circuit

140, 142, 144‧‧ ‧ position shifters

150‧‧‧Protection circuit

152‧‧‧Comparative unit

160‧‧‧Power Module

B‧‧‧Control end

C‧‧‧ second end

CK1A~CK4A‧‧‧ first output

CK1B~CK4B‧‧‧second output

E‧‧‧ first end

F1, F2‧‧‧ return line

FS1‧‧‧First feedback signal

FS2‧‧‧ second feedback signal

P‧‧‧ granules

Q1, Q2‧‧‧O crystal

S1‧‧‧ first signal

S2‧‧‧ second signal

Sp‧‧‧protection signal

Vin 1‧‧‧ first end

Vin 2‧‧‧ second end

Vo‧‧‧ output

The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

2 is a schematic diagram of a protection circuit of a display device as shown in FIG. 1 according to another embodiment of the present invention.

FIG. 3 is a schematic view showing a display device according to still another embodiment of the present invention.

4 is a schematic view showing a display device according to still another embodiment of the present invention.

The various features and elements in the figures are not drawn to scale, and are in the In addition, similar elements/components are referred to by the same or similar element symbols throughout the different drawings.

The description of the embodiments of the present invention is intended to be illustrative and not restrictive. The features of various specific embodiments, as well as the method steps and sequences thereof, are constructed and manipulated in the embodiments. However, other specific embodiments may be utilized to achieve the same or equivalent function and sequence of steps.

The scientific and technical terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the invention pertains, unless otherwise defined herein. In addition, the singular noun used in this specification covers the plural of the noun in the case of no conflict with the context; the plural noun of the noun is also included in the plural noun used.

In addition, the term "coupled" as used herein may mean that two or more elements are in direct physical or electrical contact with each other, or indirectly in physical or electrical contact with each other, or that two or more elements are interoperable. Or action.

FIG. 1 is a schematic diagram of a display device according to an embodiment of the invention. As shown, the display device 100 includes a display panel 110, a first gate array circuit (GOA) 120, a second gate array circuit 130, a level shifter 140, and a protection circuit. 150 and power module 160. Structurally, the first gate array circuit 120 is disposed on one side of the display panel 110 (eg, the left side), and the second gate array circuit 130 is disposed on the other side of the display panel 110 (eg, the right side), the display panel The above two sides of 110 are opposed to each other. The level shifter 140 is coupled to the gate array circuits 120, 130. The protection circuit 150 is also coupled to the gate array circuits 120 and 130 and coupled to the power module 160.

In operation, the level shifter 140 is configured to provide the first signal S1 and the second signal S2 to the first gate array circuit 120 and the second gate array circuit 130, respectively. If the second gate array circuit 130 generates the particles P (particle) shown in FIG. 1 in the process, the particles P may cause a short circuit between the lines of the second gate array circuit 130 to generate a high temperature, causing the polarizing plate to melt. In addition to reducing the overall performance of the display device, it also affects the customer's perception of use. In order to improve the above problem, the embodiment provides a protection circuit 150 for receiving and comparing the first signal S1 and the second signal S2. If the second gate array circuit 130 generates particles in the process to cause short circuit between the lines, the second The second signal S2 in the gate array circuit 130 is different from the first signal S1 in the defect-free (particle-free) first gate array circuit 120. For example, the first signal S1 and the second signal S2 are located. Meeting Different, the first signal S1 and the second signal S2 are, for example, the clock signal CK. When the protection circuit 150 compares and determines that the levels of the first signal S1 and the second signal S2 are different, the protection signal Sp is generated, and the protection signal Sp is transmitted to the power module 160 to turn off the power module 160 or perform other protection. mechanism.

In this manner, the display device 100 of the embodiment of the present invention uses the protection circuit 150 to receive and compare the signals S1 and S2 of the gate array circuits 120 and 130, and can transmit when any of the gate array circuits 120 and 130 is abnormal. The protection signal Sp is applied to the power module 160 to turn off the power module 160, thereby avoiding short circuit between the lines, thereby improving the high temperature caused by the short circuit caused by the particles, and therefore, does not cause the polarizing plate to melt and lower the overall performance of the display device. It will not affect the customer's perception of use. Furthermore, the protection circuit 150 of the display device 100 of the embodiment of the present invention transmits the protection signal Sp to the power module 160 when the gate array circuit 120, 130 is abnormal, to turn off the power module 160 or perform other protection. The mechanism thus improves the conventional technology. After the abnormality occurs in the gate array circuit, there is no mechanism to immediately turn off the power of the display device, which causes the phenomenon that the display device is abnormal.

In one embodiment, the level shifter 140 includes first output CK1A~CK4A and second output CK1B~CK4B. The first output CK1A~CK4A of the level shifter 140 is used to provide the first signal S1 to the first gate array circuit 120, and the second output CK1B~CK4B of the level shifter 140 is used to provide the second Signal S2 is applied to second gate array circuit 130. In another embodiment, the protection circuit 150 is coupled to the first output CK1A~CK4A and the second output CK1B~CK4B. For example, the protection circuit 150 of the display device 100 of the embodiment of the present invention and the first output CK1A~CK4A and the second output The CK1B~CK4B are coupled in parallel, so that no signal distortion is caused, thereby improving the distortion of the gate array signal caused by the series resistance of the conventional technique on the gate array circuit.

2 is a schematic diagram of a protection circuit 150 of a display device as shown in FIG. 1 according to another embodiment of the present invention. As shown, the protection circuit 150 includes a first terminal Vin 1, a second terminal Vin 2, an output terminal Vo, and a comparison unit 152. The first end Vin 1 and the second end Vin 2 are coupled to the comparing unit 152 through the resistors R1 and R2, respectively. In operation, the first terminal Vin 1 is configured to receive the first signal S1 of the first gate array circuit 120, and the second terminal Vin 2 is configured to receive the second signal S2 of the second gate array circuit 130. Then, the comparison unit 152 compares the first signal S1 and the second signal S2. If the levels of the first signal S1 and the second signal S2 are different, the comparison unit 152 generates the protection signal Sp and is protected by the output terminal Vo. The signal Sp is directed to the power module 160 of the display device 100 of FIG. 1 to turn off the power module 160 or perform other protection mechanisms.

In an embodiment, please refer to FIG. 1 and FIG. 2 together. The first end Vin 1 and the second end Vin 2 of the protection circuit 150 shown in FIG. 2 are respectively coupled to the first output CK1A to CK4A and the second output CK1B to CK4B shown in FIG. 1 .

In another embodiment, the comparison unit 152 includes a transistor Q1, a transistor Q2, and a diode D1. The transistor Q1 and the transistor Q2 each include a first end E, a control end B, and a second end C. The first end E of the transistor Q1 is coupled to the first end Vin1 of the protection circuit 150, the control terminal B of the transistor Q1 is coupled to the second end Vin 2 of the protection circuit 150, and the second end C of the transistor Q1 is coupled. Connected to the output terminal Vo of the protection circuit 150. In addition, the first end E of the transistor Q2 is coupled to the control of the transistor Q1. The terminal B of the terminal B and the protection circuit 150, the control terminal B of the transistor Q2 is coupled to the first end E of the transistor Q1 and the first end Vin of the protection circuit 150, and the second end of the transistor Q2. C is coupled to the second end C of the transistor Q1 and the output end Vo of the protection circuit 150. Furthermore, the diode D1 is coupled between the transistor Q1 and the second terminal C of the transistor Q2 and the output terminal Vo of the protection circuit 150.

FIG. 3 is a schematic view showing a display device according to still another embodiment of the present invention. Compared with the display device 100 of FIG. 1, the protection circuit 150 is configured to compare the first signal S1 of the first channel output CK1A~CK4A with the second signal S2 of the second channel output CK1B~CK4B, and the display of FIG. The device 100A compares the first feedback signal FS1 of the first way output CK1A~CK4A with the second feedback signal FS2 of the second way output CK1B~CK4B. For example, the feedback line F1 is pulled out by the signal line CK4A of the first output CK1A~CK4A; the feedback line F2 is pulled out by the signal line CK4B of the second output CK1B~CK4B. The protection circuit 150 is configured to compare the first feedback signal FS1 returned by the first feedback line F1 and the second feedback signal FS2 returned by the second feedback line F2, if the first feedback signal FS1 and the second feedback The level of the signal FS2 is different, and the protection circuit 150 generates the protection signal Sp. It should be noted that the signals returned by the feedback lines F1 and F2 are the signals of the signal lines CK4A and CK4B of the last group of gate array circuits of the blanking area of the display panel 110. Referring to FIG. 3, in the embodiment, the first feedback signal FS1 of the line CK4A of the first output CK1A~CK4A and the second feedback signal FS2 of the line CK4B of the second output CK1B~CK4B are pulled. Back, as a detection signal of the protection circuit 150.

4 is a schematic view showing a display device according to still another embodiment of the present invention. Compared to a display device having only a single level shifter 140 100 (see FIG. 1), the display device 100B of FIG. 4 has two level shifters 142, 144. The structure of the level shifter 142, 144 is coupled to the gate array circuit 120, 130, and the protection circuit 150 is coupled to the output of the level shifter 142 and the output of the level shifter 144. In operation, the level shifter 142 is configured to provide the first signal S1 to the first gate array circuit 120, and the level shifter 144 is configured to provide the second signal S2 to the second gate array circuit 130. In an embodiment, please refer to FIG. 2 and FIG. 4 together, the first end Vin 1 and the second end Vin 2 of the protection circuit 150 are respectively coupled to the output end of the level shifter 142 and the level shift The output of the 144.

It will be apparent from the above-described embodiments of the present invention that the application of the present invention has the following advantages. The embodiment of the present invention provides a display device to improve the series resistance on the gate array circuit, thereby causing the problem of signal distortion of the gate array circuit, and can improve the abnormality of the gate array circuit without any mechanism. Turning off the power of the display device causes the image of the display device to be abnormal.

Although the embodiments of the present invention are disclosed in the above embodiments, the present invention is not intended to limit the invention, and the present invention may be practiced without departing from the spirit and scope of the invention. Various changes and modifications may be made thereto, and the scope of the invention is defined by the scope of the appended claims.

100‧‧‧ display device

110‧‧‧ display panel

120‧‧‧First Gate Array Circuit

130‧‧‧Second gate array circuit

140‧‧‧ Position shift module

150‧‧‧Protection circuit

160‧‧‧Power Module

CK1A~CK4A‧‧‧ first output

CK1B~CK4B‧‧‧second output

P‧‧‧ granules

S1‧‧‧ first signal

S2‧‧‧ second signal

Sp‧‧‧protection signal

Claims (8)

A display device includes: a display panel; a first gate array circuit disposed on a first side of the display panel; and a second gate array circuit disposed on a second side of the display panel, wherein the display device The first side is opposite to the second side; a quasi-shifting module is configured to respectively provide a first signal and a second signal to the first gate array circuit and the second gate array circuit; The protection circuit is configured to receive and compare the first signal and the second signal, and generate a protection signal according to the first signal and the second signal. The display device of claim 1, further comprising: a power module coupled to the protection circuit for receiving the protection signal to perform a protection mechanism. The display device of claim 1, wherein the level shifting module comprises: a first path output for providing the first signal to the first gate array circuit; and a second output for using The second signal is provided to the second gate array circuit. The display device of claim 3, wherein the protection circuit is coupled to the first path output and the second path output. The display device of claim 3, wherein the first path output comprises a first feedback line, and the second path output comprises a second feedback line, wherein the protection circuit is configured to compare the first feedback line The protection signal generates the protection signal if the first signal is returned and the second signal returned by the second feedback line is different from the second signal. The display device of claim 1, wherein the level shifting module comprises: a first level shifter for providing the first signal to the first gate array circuit; and a second bit a quasi-shifter for providing the second signal to the second gate array circuit; wherein the protection circuit is coupled to the output of the first level shifter and the output of the second level shifter end. The display device of claim 1, wherein the protection circuit has a comparison unit, comprising: a first transistor, comprising: a first end coupled to the first end of the protection circuit for receiving a first signal; a control end coupled to the second end of the protection circuit for receiving the second signal; and a second end coupled to an output of the protection circuit; a second transistor includes: a first end coupled to the control end of the first transistor and the second end of the protection circuit; a control end coupled to the first transistor One end and the first end of the protection circuit; and a second end coupled to the second end of the first transistor and the output end of the protection circuit. The display device of claim 7, wherein the comparing unit further comprises: a diode coupled to the second end of the first transistor and the second transistor and the output end of the protection circuit Between, to output the protection signal.