TWI433103B - Amorphous silicon display apparatus - Google Patents

Description

Amorphous germanium display device

The present invention relates to a display device, and more particularly to an amorphous germanium display device.

In the technical field of display devices, in order to save the manufacturing cost of the display panel, a liquid crystal display device is taken as an example, and a gate driver of a thin film transistor (TFT) used therein is transmitted through an amorphous layer (amorphous). The silicon process is also fabricated on a thin film transistor substrate, and it is a common practice to replace the conventional integrated circuit (IC) as a gate driver.

However, depending on the physical properties of the general amorphous germanium, its electron mobility decreases as the temperature decreases. For example, an amorphous germanium transistor, typically around -10 ° C, can provide a current that is half the current that can be supplied at room temperature. That is to say, the conventional amorphous germanium display device may have a phenomenon in which sufficient driving current cannot be generated to drive the display panel due to the difference in ambient temperature, resulting in poor display quality.

In addition, the conventional amorphous germanium display device may also cause a decrease in the output current of the amorphous germanium thin film transistor and an increase in the leakage current due to the excessive operation time, which also affects the overall efficiency of the display device. Moreover, since the conventional amorphous germanium display device has a fixed wiring pattern of the scanning lines, the scanning direction is to be performed for a conventional amorphous germanium display device. The switch is not easy to achieve.

The invention provides an amorphous germanium display device, which effectively compensates for the attenuation phenomenon caused by the rise of temperature.

The invention provides another amorphous germanium display device, which effectively reduces the phenomenon that the gate driver is attenuated by the long-term operation and the leakage current rises.

The present invention provides a further amorphous germanium display device which can simply change the scanning direction of its gate driver.

The invention provides an amorphous germanium display device with an amorphous germanium display panel, comprising a driving controller, a main gate driver, a temperature sensor, an auxiliary gate driver and a switching circuit. The drive controller generates a drive control signal. The main gate driver is coupled to the drive controller to receive the drive control signal. The temperature sensor is coupled to the drive controller to detect an ambient temperature to generate a switching control signal. The auxiliary gate driver receives and drives the amorphous germanium display panel in accordance with the drive control signal. The switching circuit is coupled to the temperature sensor and coupled between the paths of the auxiliary gate driver receiving the driving control signal. The switching circuit is responsive to the switching control signal to turn on or off the path of the auxiliary gate driver to receive the drive control signal. Among them, the main gate driver, the auxiliary gate driver, and the amorphous germanium display panel are also disposed on the amorphous germanium substrate.

The invention further provides an amorphous germanium display device having an amorphous germanium display panel, comprising a driving controller, a main gate driver, an auxiliary gate driver and a switching circuit. The drive controller generates a drive control signal. drive The controller counts the operation time to generate a switching control signal according to the operation time. The drive controller includes a timer for counting the operation time of the display device, and generating a switching control signal according to comparing the preset time with the operation time. The main gate driver is coupled to the drive controller to receive the drive control signal. The auxiliary gate driver receives and drives the amorphous germanium display panel in accordance with the drive control signal. The switching circuit is coupled to the driving controller and coupled between the path of the auxiliary gate driver receiving the driving control signal, and the switching circuit is further coupled between the path of the main gate driver receiving the driving control signal. In addition, the switching circuit alternately turns on or off the path of the auxiliary gate driver receiving the driving control signal and the path of the main gate driver receiving the driving control signal according to the switching control signal. Among them, the main gate driver, the auxiliary gate driver, and the amorphous germanium display panel are also disposed on the amorphous germanium substrate.

The invention further provides an amorphous germanium display device having an amorphous germanium display panel, comprising a driving controller, a main gate driver, an auxiliary gate driver and a switching circuit. The drive controller generates a drive control signal. The main gate driver is coupled to the drive controller for receiving the drive control signal. The auxiliary gate driver receives and drives the amorphous germanium display panel in accordance with the drive control signal. The switching circuit is coupled to the driving controller and coupled between the paths of the auxiliary gate driver receiving the driving control signals. In addition, the switching circuit is further coupled between the paths of the main gate driver receiving the drive control signals. The switching circuit selects a signal according to the scan order to turn on the path of the auxiliary gate driver to receive the drive control signal or to turn on the path of the main gate driver to receive the drive control signal. The scan sequence selector is coupled to the switching circuit to provide a scan sequence selection signal to the switching circuit. Among them, the main gate driver and the auxiliary gate driver And the amorphous germanium display panel is also placed on the amorphous germanium substrate.

Based on the above, the present invention additionally configures an auxiliary gate driver in addition to the main gate driver on the amorphous germanium display device. And driving the control signal to be transmitted to at least one of the main gate driver and the auxiliary gate driver through the switching circuit turning on or off. The primary gate driver and the auxiliary gate driver jointly drive the amorphous germanium display panel, alternately drive the amorphous germanium display panel, or select one of the main gate driver and the auxiliary gate driver to set the scanned of the amorphous germanium display panel. order. As a result, it is possible to compensate for the degradation of the gate driver on the amorphous germanium display device due to high temperature or long-time operation. Alternatively, the function of switching the scanning order may be achieved without changing the hardware wiring of the amorphous germanium display device.

The above described features and advantages of the present invention will be more apparent from the following description.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of an amorphous germanium display device 100 according to an embodiment of the invention. The display device 100 has an amorphous germanium display panel 160, and includes a driving controller 110, a temperature sensor 120, a main gate driver 130, an auxiliary gate driver 140, and a switching circuit 150. Moreover, in the present embodiment, the main gate driver 130, the auxiliary gate driver 140, and the amorphous germanium display panel 160 are all disposed on the same amorphous germanium substrate 170.

In addition, the primary gate driver 130 and the auxiliary gate driver 140 It is coupled to the amorphous germanium display panel 160. More specifically, the main gate driver 130 and the auxiliary gate driver 140 are a plurality of thin film transistors (not shown) coupled to the amorphous germanium display panel 160. The primary gate driver 130 and the auxiliary gate driver 140 are coupled in parallel to the drive controller 110 to receive the drive control signal DCTRL. The switching circuit 150 is coupled to the temperature sensor 120 and coupled between the paths of the auxiliary gate driver 140 receiving the driving control signal DCTRL. The switching circuit 150 receives the switching control signal CS generated by the temperature sensor 120, and turns on or off the path of the auxiliary gate driver 140 receiving the driving control signal DCTRL according to the switching control signal CS.

The drive controller 110 is configured to generate a drive control signal DCTRL. The drive control signal DCTRL is used to control the primary gate driver 130 or the auxiliary gate driver 140 to drive the amorphous germanium display panel 160. The drive control signal DCTRL includes a clock signal CLK, a reverse clock signal CLKB, a start pulse signal STP, and a gate drive voltage VGL. The clock signal CLK and the reverse clock signal CLKB are used to supply the primary gate driver 130 or the auxiliary gate driver 140 to generate a gate sequence of the gate line of the amorphous germanium display panel 160, the starting pulse The wave signal STP is a start signal for informing the main gate driver 130 and/or the auxiliary gate driver 140 to start scanning, and the gate driving voltage VGL is provided as the main gate driver 130 and/or the auxiliary gate driver 140 to be generated. A voltage source that drives a driving voltage of the thin film transistor in the amorphous germanium display panel 160.

It can be known from the above description that when the main gate driver 130 or the auxiliary When the gate driver 140 effectively receives the driving control signal DCTRL, the main gate driver 130 and/or the auxiliary gate driver 140 can drive the amorphous germanium display panel 160 according to the driving control signal DCTRL. Conversely, the primary gate driver 130 and/or the auxiliary gate driver 140 that have not received the drive control signal DCTRL cannot generate a drive signal to drive the amorphous germanium display panel 160.

In this embodiment, the temperature sensor 120 generates the switching control signal CS according to the detected ambient temperature, and controls the switching circuit 150 to turn on or off the auxiliary gate driver 140 to receive the driving control through the switching control signal CS. The path to the signal DCTRL. Specifically, when the temperature sensor 120 detects that the ambient temperature is lower than a preset threshold, the current value of the amorphous germanium transistor is already low. Therefore, the switching circuit 150 turns on the path of the auxiliary gate driver 140 receiving the driving control signal DCTRL according to the switching control signal CS, and thereby enables the auxiliary gate driver 140 to efficiently receive the driving control signal DCTRL.

In this way, the auxiliary gate driver 140 can supply current to drive the amorphous germanium display panel 160 together with the main gate driver 130 when the ambient temperature is lower than the critical value, and prevent the amorphous germanium display panel 160 from being exposed to the ambient temperature. Too low, resulting in insufficient brightness.

In contrast, if the ambient temperature is not lower than a preset threshold, it indicates that the main gate driver 130 at this time is sufficient to drive the amorphous germanium display panel 160. Therefore, the switching circuit 150 turns off the path in which the auxiliary gate driver 140 receives the drive control signal DCTRL in accordance with the switching control signal CS. That is, only the action of the main gate driver 130 is maintained, and the auxiliary gate is turned off. The action of the pole driver 140.

Incidentally, the threshold value used by the temperature sensor 120 to generate the switching control signal CS may be preset by the designer according to the relationship between the temperature of the amorphous display device 100 and the electron mobility. That is to say, different amorphous germanium display devices can set different threshold values.

Referring to FIG. 2, FIG. 2 is a schematic diagram of an amorphous germanium display device 200 according to another embodiment of the present invention. The display device 200 includes a drive controller 210, a temperature sensor 220, a main gate driver 230, an auxiliary gate driver 240, and a switching circuit 250. The operation mode of the amorphous germanium display device 200 of the present embodiment is the same as that of the amorphous germanium display device 100 illustrated in FIG. 1 , and will not be described below. Unlike the amorphous germanium display device 100 shown in FIG. 1, the main gate driver 230, the auxiliary gate driver 240, the amorphous germanium display panel 260, and the switching circuit 250 of the amorphous germanium display device 200 are disposed in On the same amorphous germanium substrate 270.

Please refer to FIG. 3, which illustrates another embodiment of the amorphous germanium display device 200 of the embodiment of FIG. 2 of the present invention. The main gate driver 230 and the auxiliary gate driver 240 are not necessarily disposed on the two different and opposite sides of the amorphous germanium display panel 260 as shown in FIG. 2 . The arrangement relationship between the main gate driver 230 and the auxiliary gate driver 240 and the amorphous germanium display panel 260 can be arbitrarily changed. In the present embodiment, the main gate driver 230 and the auxiliary gate driver 240 are disposed on the same side of the amorphous germanium display panel 260. Of course, the primary gate driver 230 and the auxiliary gate driver 240 can also be disposed on two different but opposite sides of the amorphous germanium display panel 260.

Referring to FIG. 4, FIG. 4 is a schematic diagram of an amorphous germanium display device 400 according to still another embodiment of the present invention. The amorphous germanium display device 400 also has an amorphous germanium display panel 460, and the amorphous germanium display device 400 includes a drive controller 410, a main gate driver 430, an auxiliary gate driver 440, and a switching circuit 450. Moreover, in the present embodiment, the main gate driver 430, the auxiliary gate driver 440, and the amorphous germanium display panel 460 are all disposed on the same amorphous germanium substrate 470.

In this embodiment, the drive controller 410 is configured to generate a drive control signal DCTRL. And, the drive controller 410 counts the operation time of the amorphous display device 400, and generates the switching control signal CS in accordance with the count result of the operation time. That is, the timer 411 can be included in the drive controller 410. The timer 411 performs an operation of counting when the amorphous display device 400 performs a display operation. Further, the timer 411 generates a switching control signal CS based on the result of the counting.

For example, the timer 411 can change the switching control signal CS (for example, changed by state 0) when the display device 400 of the amorphous device performs a display operation and can reach a preset time (for example, 10 minutes) according to the counting result. For state 1), and re-count the action. The timer 411 and in the next 10 minutes, restores the switching control signal CS to state 0.

The switching circuit 450 is coupled to the driving controller 410. Moreover, the switching circuit 450 is also coupled between the paths of the auxiliary gate driver 440 receiving the driving control signal DCTRL. And, the switching circuit 450 is also coupled between the paths of the main gate driver 430 receiving the driving control signal DCTRL. The switching circuit 450 alternately turns on or off according to the received switching control signal CS. The auxiliary gate driver 440 receives the path of the drive control signal DCTRL and the path of the main gate driver 430 receiving the drive control signal DCTRL.

Since the switching control signal CS is generated by the drive controller 410, and the switching control signal CS is switched at timing (changing the state of the signal). Therefore, only one of the primary gate driver 430 and the auxiliary gate driver 440 receives the drive control signal DCTRL, and the primary gate driver 430 and the secondary gate driver 440 are timed alternately receiving the drive control signal DCTRL. In other words, whether it is the primary gate driver 430 or the auxiliary gate driver 440, in this embodiment, the continuous operation time does not exceed the preset time used by the timer 411 for comparison. Therefore, an effective improvement of the gate driver due to long-term operation can be obtained in the present embodiment.

Incidentally, the switching circuit 450 includes switching modules 451 and 452. The switching module 451 is coupled to the driving controller 410 and coupled between the paths of the main gate driver 430 receiving the driving control signal DCTRL. The switching module 451 turns on or off the path of the main gate driver 430 receiving the driving control signal DCTRL according to the switching control signal CS. The switching module 452 is coupled to the drive controller 410 and coupled between the paths of the auxiliary gate driver 440 receiving the drive control signal DCTRL. The switching module 452 turns on or off the path of the auxiliary gate driver 440 receiving the driving control signal DCTRL according to the switching control signal CS. The switching module 451 and the switching module 452 are opposite to each other.

Please refer to FIG. 5. FIG. 5 is a schematic diagram of an amorphous germanium display device 500 according to another embodiment of the present invention. The amorphous germanium display device 500 also has The amorphous germanium display panel 560, and the amorphous germanium display device 500 includes a drive controller 510, a main gate driver 530, an auxiliary gate driver 540, and a switching circuit 550. Moreover, in the present embodiment, the main gate driver 530, the auxiliary gate driver 540, and the amorphous germanium display panel 560 are all disposed on the same amorphous germanium substrate 570. The operation mode of the amorphous germanium display device 500 of the present embodiment is the same as that of the amorphous germanium display device 400 illustrated in FIG. 4, and will not be described below. The main gate driver 530, the auxiliary gate driver 540, the amorphous gate display panel 560, and the switching circuit 550 of the amorphous germanium display device 500 are different from the amorphous germanium display device 400 illustrated in FIG. On the same amorphous germanium substrate 570.

Please refer to FIG. 6 . FIG. 6 illustrates an amorphous germanium display device 600 according to still another embodiment of the present invention. The amorphous germanium display device 600 has an amorphous germanium display panel 660. The amorphous germanium display device 600 includes a drive controller 610, a main gate driver 630, an auxiliary gate driver 640, and a switching circuit 650. The drive controller 610 generates a drive control signal DCTRL. The main gate driver 630 is coupled to the switching circuit 650 and passes through the switching circuit 650 to determine whether to receive the driving control signal DCTRL. The auxiliary gate driver 640 is coupled to the switching circuit 650 and passes through the switching circuit 650 to determine whether to receive the driving control signal DCTRL. The switching circuit 650 is coupled to the driving controller 610, coupled between the path of the auxiliary gate driver 640 receiving the driving control signal DCTRL, and coupled between the path of the main gate driver 630 receiving the driving control signal DCTRL. Further, the main gate driver 630, the auxiliary gate driver 640, and the amorphous germanium display panel 660 are also placed on the amorphous germanium substrate 670.

Switching circuit 650 includes switching modules 651 and 652. The switching module 651 is coupled to the driving controller 610 and coupled between the paths of the main gate driver 630 receiving the driving control signal DCTRL. The switching module 651 turns on or off the path of the main gate driver 630 receiving the driving control signal CTRL according to the scanning order selection signal SSEL. The switching module 652 is coupled to the driving controller 610 and coupled between the paths of the auxiliary gate driver 640 receiving the driving control signal DCTRL. The switching module 652 turns on or off the path of the auxiliary gate driver 640 receiving the driving control signal DCTRL according to the scanning order selection signal SSEL. The switching module 651 and the switching module 652 are opposite to each other.

It should be noted here that there are typically multiple drive channels in each of the primary gate driver 630 and the secondary gate driver 640. The drive channels respectively transmit drive signals to respective display columns in the corresponding connected amorphous display panel 660. In this embodiment, the start pulse signal STP in the drive control signal DCTRL is transmitted to the drive channel of the main gate driver 630 through the switching module 651, and is transmitted to the start pulse signal STP through the switching module 652. The drive channels of the auxiliary gate driver 640 are different.

For example, in the embodiment, the initial pulse wave signal STP is transmitted to the first driving channel of the main gate driver 630 through the switching module 651, and is transmitted to the auxiliary gate driver 640 through the switching module 652. The last drive channel. As a result, the scan order of the primary gate driver 630 and the auxiliary gate driver 640 may be reversed.

As can be seen from the above description, by setting the scanning order selection signal SSEL, the amorphous germanium display panel 660 can be easily changed. The order of being driven. In this embodiment, when the switching module 651 is turned on and the main gate driver 630 receives the driving control signal DCTRL (while the switching module 652 is turned off), the amorphous germanium display panel 660 is sequentially displayed by the first one. The column to the last display column is driven. Conversely, when the switching module 652 is turned on and the auxiliary gate driver 640 receives the driving control signal DCTRL (while the switching module 651 is turned off), the amorphous display panel 660 sequentially passes from the last display column to the first one. The display column is driven.

In order to effectively provide the scan order selection signal SSEL to the switching circuit 650, the amorphous display device 600 further includes a scan order selector 690. The scan sequence selector 690 is coupled to the switch circuit 650 for providing the scan order selection signal SSEL to the switch circuit 650. The scan sequence selector 690 can receive the settings of the external user and convert the user's settings into the scan order selection signal SSEL, and thereby control the scanned order of the amorphous germanium display panel 660 in the amorphous display device 600. .

Next, please refer to FIG. 7. FIG. 7 is a schematic diagram of an amorphous germanium display device 700 according to a further embodiment of the present invention. The display device 700 includes a drive controller 710, a scan sequence selector 790, a main gate driver 730, an auxiliary gate driver 740, and a switching circuit 750. The operation mode of the amorphous germanium display device 700 of the present embodiment is the same as that of the amorphous germanium display device 600 illustrated in FIG. 6, and will not be described below. Unlike the amorphous germanium display device 600 shown in FIG. 6, the main gate driver 730, the auxiliary gate driver 740, the amorphous germanium display panel 760, and the switching circuit 750 of the amorphous germanium display device 700 are all disposed in On the same amorphous germanium substrate 770.

In summary, the present invention is provided by the main gate drive and is provided with auxiliary Help gate driver. And controlling the state of the main gate driver and the auxiliary gate driver to receive the driving control signal by switching the circuit to alternately or simultaneously turn on the actions of the main gate driver and the auxiliary gate driver to overcome the high temperature or long time The decay caused by the operation. Alternatively, the function of switching the scanning order may be achieved without changing the hardware wiring of the amorphous germanium display device.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100, 200, 400, 500, 600, 700‧‧‧ amorphous display devices

110, 210, 410, 510, 610, 710‧‧‧ drive controller

120, 220‧‧‧ Temperature Sensor

130, 230, 430, 530, 630, 730‧‧‧ main gate drivers

140, 240, 440, 540, 640, 740‧‧‧Auxiliary gate drivers

150, 250, 450, 550, 650, 750‧‧‧ switching circuits

160, 260, 460, 560, 660, 760‧‧‧ amorphous display panel

170, 270, 470, 570, 670, 770‧‧‧ amorphous substrate

451, 452, 551, 552, 651, 652, 751, 752‧‧‧ switch modules

411‧‧‧Timer

690, 790‧‧‧ scan sequence selector

DCTRL‧‧‧ drive control signal

CS‧‧‧Switch control signal

SSEL‧‧‧ scan sequence selection signal

STP‧‧‧ starting pulse wave signal

FIG. 1 is a schematic diagram of an amorphous germanium display device 100 according to an embodiment of the invention.

FIG. 2 is a schematic diagram of an amorphous germanium display device 200 according to another embodiment of the present invention.

3 illustrates another embodiment of an amorphous germanium display device 200 of the embodiment of FIG. 2 of the present invention.

FIG. 4 is a schematic diagram of an amorphous germanium display device 400 according to still another embodiment of the present invention.

FIG. 5 is a schematic diagram of an amorphous germanium display device 500 according to another embodiment of the present invention.

FIG. 6 illustrates an amorphous germanium display device 600 according to still another embodiment of the present invention.

FIG. 7 illustrates an amorphous germanium display device 700 according to a further embodiment of the present invention. Schematic diagram.

100‧‧‧Amorphous display device

110‧‧‧Drive Controller

120‧‧‧temperature sensor

130‧‧‧Main gate driver

140‧‧‧Auxiliary gate driver

150‧‧‧Switching circuit

160‧‧‧Amorphous display panel

170‧‧‧Amorphous germanium substrate

DCTRL‧‧‧ drive control signal

CS‧‧‧Switch control signal

Claims (8)

An amorphous germanium display device having an amorphous germanium display panel includes: a drive controller for generating a drive control signal; a primary gate driver coupled to the drive controller for receiving and receiving the control signal according to the drive Driving a plurality of gate scan lines; a temperature sensor coupled to the drive controller to detect an ambient temperature to generate a switching control signal; an auxiliary gate driver receiving and driving the amorphous according to the driving control signal a plurality of gate scan lines of the display panel; and a switching circuit coupled to the temperature sensor and coupled between the path of the auxiliary gate driver receiving the driving control signal, the switching circuit is configured according to the switching control signal The path of the driving control signal is received or turned off by the auxiliary gate driver, wherein the main gate driver, the auxiliary gate driver and the amorphous germanium display panel are also disposed on an amorphous germanium substrate. The display device of the amorphous germanium according to claim 1, wherein the switching circuit is disposed on the amorphous germanium substrate. The display device of the amorphous germanium according to claim 1, wherein the main gate driver and the auxiliary gate driver are disposed on the same side of the amorphous germanium display panel or respectively disposed on the amorphous germanium display panel. Same side edges. The display device of the amorphous germanium according to claim 1, wherein the temperature sensor detects that the ambient temperature is less than a critical value, The switching control signal is generated to turn on the path of the auxiliary gate driver to receive the driving control signal by the switching circuit. An amorphous germanium display device has an amorphous germanium display panel, comprising: a driving controller, generating a driving control signal, the driving controller counting an operation time, and generating a switching control signal according to the operating time The driving controller includes: a timer that counts an operation time of the display device, and generates a switching control signal according to comparing a preset time with the operating time; a primary gate driver coupled to the driving controller, Receiving the driving control signal; an auxiliary gate driver receiving and driving the amorphous display panel according to the driving control signal; and a switching circuit coupled to the driving controller and coupled to the auxiliary gate driver to receive the driving Between the paths of the driving control signals, the switching circuit is further coupled between the path of the main gate driver receiving the driving control signal, and the switching circuit alternately turns on or off the auxiliary gate driver to receive the driving according to the switching control signal. a path of the control signal and a path of the main gate driver receiving the drive control signal, wherein To gate driver, the gate driver auxiliary amorphous silicon and the display panel is set to the same amorphous silicon on a substrate. The display device of the amorphous germanium according to claim 5, wherein the switching circuit is disposed on the amorphous germanium substrate. Such as the amorphous enamel display device described in claim 5 The main gate driver and the auxiliary gate driver are disposed on the same side of the amorphous display panel or respectively disposed on opposite sides of the amorphous germanium display panel. The display device of the amorphous germanium according to claim 5, wherein the switching circuit comprises: a first switching module coupled to the driving controller, and coupled to the main gate driver to receive the driving control Between the paths of the signals, the path of the main gate driver receiving the driving control signal is turned on or off according to the switching control signal; and a second switching module coupled to the driving controller and coupled to the auxiliary gate The path of the driving control signal is received by the pole driver according to the switching control signal, and the path of the driving control signal is received or disconnected by the auxiliary gate driver, wherein the first switching module and the second switching module The action of turning on or off is reversed.