CN201549185U

CN201549185U - Less power consumption drive deivce of AMOLED panel

Info

Publication number: CN201549185U
Application number: CN2009203171285U
Authority: CN
Inventors: 文埕勇
Original assignee: Sichuan CCO Display Technology Co Ltd
Current assignee: Sichuan CCO Display Technology Co Ltd
Priority date: 2009-12-11
Filing date: 2009-12-11
Publication date: 2010-08-11
Anticipated expiration: 2019-12-11

Abstract

The utility model relates to a less power consumption drive device of AMOLED panels. The utility model discloses the less power consumption drive device of AMOLED panels, capable of solving a problem of short service lifetime due to great power consumption of the traditional drive device. The technical project of the utility model is that the device includes a DC/DC conversion chip, an OLED panel, a first electronic switch, a second electronic switch, a first capacitance, a second capacitance, a first controller and a second controller; an input end of the first electronic switch is connected with the DC/DC conversion chip, an output end is grounded through the first capacitance and connected with the OLED panel, and a connection end is connected with the first controller; an input end of the second electronic switch is connected with the DC/DC conversion chip, and output end is grounded through the second capacitance and connected with the OLED panel, and an control end is connected with the second controller. The beneficial effects of the utility model are that less power consumption, less heat productivity, and elongation of the AMOLED panel service lifetime.

Description

A kind of AMOLED board driving mchanism of low power consumption

Technical field

The utility model relates to display technique field, plane, relates to a kind of AMOLED board driving mchanism of low power consumption specifically.

Background technology

In order to drive AMOLED (active-matrix Organic Light Emitting Diode) panel, the driving voltage that needs has ELVDD and ELVSS (a following modulating voltage that all is called).These modulating voltages are to produce in that drive integrated circult is inner, and to each unit supply of panel, therefore need bigger electric current, and generalized case is that the outside is appended the voltage generation circuit of lighting a lamp separately and provided.The voltage generation circuit of lighting a lamp is to use the DC/DC conversion chip to finish, and it can be by regulating the size that duty is recently regulated output voltage, and the voltage of exporting from the DC/DC conversion chip uses as a modulating voltage.Adopt this mode, the power supply of each unit of panel can be met, but because the DC/DC conversion chip continue to be given the power supply of OLED (Organic Light Emitting Diode) panel, therefore causes power consumption big, and causes the heating of DC/DC conversion chip and reduction serviceable life.

The utility model content

Technical problem to be solved in the utility model is: a kind of AMOLED board driving mchanism of low power consumption is provided, and it is big to solve traditional drive unit power consumption, because of heating causes the problem that serviceable life is short.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of AMOLED board driving mchanism of low power consumption, comprise DC/DC conversion chip, oled panel, also comprise first electronic switch, second electronic switch, first electric capacity, second electric capacity, first controller and second controller; The described first electronic switch input end connects the DC/DC conversion chip, and output terminal is by first capacity earth, and the connection oled panel; The described second electronic switch input end connects the DC/DC conversion chip, and output terminal is by second capacity earth, and the connection oled panel; Described first controller connects the control end of first electronic switch, and described second controller connects the control end of second electronic switch.

Described first electronic switch, second electronic switch all adopt contactless electronic beam switch.

Described contactless electronic beam switch is a metal-oxide-semiconductor, and the drain electrode of first metal-oxide-semiconductor connects the DC/DC conversion chip, and source electrode is by first capacity earth, and source electrode connects oled panel; The drain electrode of second metal-oxide-semiconductor connects the DC/DC conversion chip, and source electrode is by second capacity earth, and source electrode connects oled panel; First controller connects the grid of first metal-oxide-semiconductor, and second controller connects the grid of second metal-oxide-semiconductor.

Described first controller, second controller are clock oscillator.

The beneficial effects of the utility model are: power consumption is little, thermal value is little, prolong AMOLED panel serviceable life.

Description of drawings

Fig. 1 is the electrical block diagram of embodiment.

Embodiment

The utility model will be further described below in conjunction with drawings and Examples.

With respect to prior art, main improvement of the present utility model is to have increased switching device, capacitor element and controller, time-shared switch by controller gauge tap device and DC/DC conversion chip, and the continuous charge and discharge that utilize capacitor element keep the oled panel continued power, reduced power consumption, reduce thermal value, helped prolonging AMOLED panel serviceable life.

Embodiment:

As shown in Figure 1, the AMOLED board driving mchanism of the low power consumption in this example comprises DC/DC conversion chip, oled panel, also comprises first metal-oxide-semiconductor, second metal-oxide-semiconductor, first electric capacity, second electric capacity, first clock oscillator and second clock oscillator; The drain electrode of first metal-oxide-semiconductor connects the DC/DC conversion chip, and source electrode is by first capacity earth, and source electrode connects oled panel; The drain electrode of second metal-oxide-semiconductor connects the DC/DC conversion chip, and source electrode is by second capacity earth, and source electrode connects oled panel; First controller connects the grid of first metal-oxide-semiconductor, and second controller connects the grid of second metal-oxide-semiconductor.

Its principle of work is: control the conducting of the first metal-oxide-semiconductor a or end by the first clock oscillator output switching signal, thereby carry out the output voltage ELVDD1 of time-shared switch DC/DC conversion chip, and the first electric capacity b carried out charge and discharge, when the first metal-oxide-semiconductor a cut-off state, when being output voltage ELVDD1 disconnection, also can continue the discharge by the first electric capacity b, output voltage ELVDD2 carries out continued power to oled panel; Control the conducting of the second metal-oxide-semiconductor b or end by the second clock oscillator output and the switching signal of the first clock oscillator different frequency, thereby carry out the output voltage ELVSS1 of time-shared switch DC/DC conversion chip, and the second electric capacity d carried out charge and discharge, when the second metal-oxide-semiconductor b cut-off state, when being output voltage ELVSS1 disconnection, also can continue the discharge by the second electric capacity d, output voltage ELVSS2 carries out continued power to oled panel.So just reduced the power-on time of DC/DC conversion chip, promptly reduced power consumption, also brought the effect that reduces its heating, thereby increase the service life.

First electronic switch in the utility model, second electronic switch also can adopt contact-type electronic switch (for example midget relay) except adopting noncontacting switch, also can adopt PLC control for first controller and second controller.First metal-oxide-semiconductor and second metal-oxide-semiconductor adopt N raceway groove or P raceway groove all can.

Claims

1. the AMOLED board driving mchanism of a low power consumption comprises DC/DC conversion chip, oled panel, it is characterized in that: also comprise first electronic switch, second electronic switch, first electric capacity, second electric capacity, first controller and second controller; The described first electronic switch input end connects the DC/DC conversion chip, and output terminal is by first capacity earth, and the connection oled panel; The described second electronic switch input end connects the DC/DC conversion chip, and output terminal is by second capacity earth, and the connection oled panel; Described first controller connects the control end of first electronic switch, and described second controller connects the control end of second electronic switch.

2. the AMOLED board driving mchanism of a kind of low power consumption as claimed in claim 1, it is characterized in that: described first electronic switch, second electronic switch all adopt contactless electronic beam switch.

3. the AMOLED board driving mchanism of a kind of low power consumption as claimed in claim 2, it is characterized in that: described contactless electronic beam switch is a metal-oxide-semiconductor, the drain electrode of first metal-oxide-semiconductor connects the DC/DC conversion chip, and source electrode is by first capacity earth, and source electrode connects oled panel; The drain electrode of second metal-oxide-semiconductor connects the DC/DC conversion chip, and source electrode is by second capacity earth, and source electrode connects oled panel; First controller connects the grid of first metal-oxide-semiconductor, and second controller connects the grid of second metal-oxide-semiconductor.

4. as the AMOLED board driving mchanism of any described a kind of low power consumption in the claim 1 to 3, it is characterized in that: described first controller, second controller are clock oscillator.