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Display device and driver thereof

Pending Publication Date: 2021-11-04
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a display device and driver that can improve the speed at which the driver's output changes and can adjust this improvement according to the load and coupling condition of the light emitting elements being driven. This allows for a more dynamic and efficient response from the display device.

Problems solved by technology

However, in high resolution applications, there are several problems in driving such light emitting unit arrays.
For example, insufficient slew rate of the driver results in the inability to output a complete pulse, the coupling effect between channels results in the incorrect lighting behavior, or the slew rate of the driver is inconsistent under different coupling conditions, and so on.

Method used

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  • Display device and driver thereof
  • Display device and driver thereof
  • Display device and driver thereof

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0046]At least to solve the above mentioned problem that the LEDs cannot be lit, according to an embodiment of the present disclosure, a driver is provided to solve the above mentioned technical problem. In this embodiment, beneficial improvements will be made to the driving units in the driver, and the driving units in this embodiment will be described in detail below with reference to FIG. 4.

[0047]FIG. 4 shows an example of a driving unit and a waveform diagram associated with the driving unit according to an embodiment of the present disclosure. As shown in FIG. 4, the driving unit 400 includes a driving circuit 401 and a regulating circuit 402, and receives a PWM signal. The driving circuit 401 is configured to provide a driving current to the corresponding column(s) of the light emitting units (such as LEDs) in the light emitting unit array according to the received PWM signal, when the channel switch is turned-on; the regulating circuit 402 is configured to be connected in par...

second embodiment

[0051]In addition, in order to at least solve the above mentioned problem of erroneously lighting of the LEDs, according to an embodiment of the present disclosure, a driver is provided to solve the above mentioned technical problem. The driving unit 500 in this embodiment will be described in detail below with reference to FIG. 5. In this embodiment, the driving unit is similar to the driving unit shown in FIG. 4, and compared with FIG. 4, the difference of FIG. 5 is that the adjusting circuit 502 included in the driving unit 500 not only includes a charge path circuit 5021, but also includes a discharge path circuit 5022 to provide a discharge path to the corresponding column of LEDs, thereby solving the above mentioned problem of erroneously lighting of the LEDs.

[0052]Specifically, still taking the LED array shown in FIG. 1 as an example, after the channel switch in column C[1] is switched from on to off, the LEDs in the corresponding column in the LED array are disconnected from...

third embodiment

[0054]In addition, according to the third embodiment of the present disclosure, the driver further includes a mixed-signal controller, which is coupled to the regulating circuit described above in conjunction with FIGS. 4-5, and the mixed-signal controller is used to control the turn-on of the regulating circuit according to PWM.

[0055]Hereinafter, an optional embodiment according to the present disclosure will be described with reference to FIG. 6, which shows an overall diagram showing a driving system and an example of a driving unit according to an embodiment of the present disclosure. In this example, the driving system is composed of a driver, the LED array (as a part of the display device) driven by the driver, and an external controller. It should be understood that the driving system according to the present disclosure may also include other appropriate modules or units, which are not shown in this embodiment for concision. In addition, FIG. 6 also shows the specific structu...

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PUM

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Abstract

The present disclosure relates to a driver for driving a light emitting unit array of a display device, the driver including: a plurality of driving units, each of the plurality of driving units includes: a driving circuit configured to provide a driving current to a corresponding column of light emitting units in the light emitting unit array according to a pulse width modulation signal, during a turn-on period of a channel switch; a regulating circuit configured to be connected in parallel with the driving circuit and be turned on according to the pulse width modulation signal to form a path with the corresponding column of the light emitting units, such that a current associated with the light emitting units flows through the path.

Description

TECHNICAL FIELD[0001]The present disclosure relates to the field of integrated circuits. More specifically, the present disclosure relates to a display device including a light emitting unit array and a driver for driving the light emitting unit array of the display device.BACKGROUND[0002]In recent years, with the continuous development of display technology and the increasing requirements of consumers for the display resolution of electronic devices such as mobile phones and televisions, designers are required to integrate high-density light emitting unit arrays (e.g., LED) in a limited space. However, in high resolution applications, there are several problems in driving such light emitting unit arrays. For example, insufficient slew rate of the driver results in the inability to output a complete pulse, the coupling effect between channels results in the incorrect lighting behavior, or the slew rate of the driver is inconsistent under different coupling conditions, and so on. The...

Claims

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Application Information

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IPC IPC(8): G09G3/32
CPCG09G3/32G09G2320/064G09G2330/021G09G2300/06G09G2310/0272G09G2310/0248
Inventor MA, YU-SHENGCHENG, JHIH-SIOULIN, CHUN-FULIN, JIN-YIHUANG, JU-LIN
Owner NOVATEK MICROELECTRONICS CORP