# US 10,482,812 B1 · Light-emitting control signal generation circuit, display panel and display apparatus

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,482,812 B1
- Document ID: US10482812B1
- Status: Granted
- Kind: B1
- Application number: 16/227,283
- Filed: 2018-12-20
- Published: 2019-11-07
- Granted: 2019-11-19
- Earliest claimed: 2018-05-07
- Assignees: Shanghai Tianma Micro-Electronics Co., Ltd.
- Applicants: Shanghai Tianma Micro-Electronics Co., Ltd.
- Inventors: Yingteng Zhai
- Web page: https://patentgrep.com/patent/US10482812B1

## CPC

- G09G 3/3225: using an active matrix
- G09G 3/3266: Details of drivers for scan electrodes
- G09G 3/2014: {by modulation of the duration of a single pulse during which the logic level remains constant}
- H03K 3/017: Adjustment of width or dutycycle of pulses (pulse width modulation H03K7/08 {; to maintain energy constant H03K3/015})
- G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
- G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2320/0233: Improving the luminance or brightness uniformity across the screen
- G09G 2320/064: by time modulation of the brightness of the illumination source
- G09G 2330/021: Power management, e.g. power saving
- G11C 19/28: using semiconductor elements (G11C19/14, G11C19/36 take precedence)
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M)
- G11C: STATIC STORES (semiconductor memory devices H10B)

## Abstract

A light-emitting control signal generation circuit, a display panel and a display apparatus are provided. The light-emitting control signal generation circuit includes a first control module, an interlocking stabilization module, a second control module and an output module. The display panel includes a cascade circuit including a plurality of light-emitting control signal generation circuits, and the display apparatus includes the display panel. The light-emitting control signal generation circuit has a simple circuit structure with four modules coordinating one another, such that a signal outputted by a signal output terminal has a same pulse width as an effective pulse signal supplied to a signal input terminal. By adjusting the pulse with of the effective input pulse signal, the pulse width of the output signal may be adjusted accordingly, thereby fulfilling various display needs for different brightness of the display panel and improving quality and flexibility of display images.

## Claims

### Claim 1

A light-emitting control signal generation circuit, comprising:
a first control module;
an interlocking stabilization module;
a second control module; and
an output module, wherein:
the first control module is configured to control a potential of a first node, under a control of an effective pulse signal inputted by a signal input terminal, a first clock signal inputted by a first clock signal terminal and a second clock signal inputted by a second clock signal terminal,
the second control module is configured to control a potential of a second node, under a control of the first clock signal inputted by the first clock signal terminal, the second clock signal inputted by the second clock signal terminal, a first voltage signal inputted by a first voltage signal terminal, a second voltage signal inputted by a second voltage signal terminal and the potential of the first node,
the interlocking stabilization module is configured to stably control a potential of a third node, under a control of the second voltage signal inputted by the second voltage signal terminal, and
the output module is configured to transmit the first voltage signal inputted by the first voltage signal terminal to a signal output terminal under a control of the potential of the first node and the potential of the third node, and to transmit the second voltage signal inputted by the second voltage signal terminal to the signal output terminal under a control of the potential of the second node.

### Claim 2 (depends on 1)

The light-emitting control signal generation circuit according to claim 1, wherein:
the effective pulse signal inputted by the signal input terminal has a high level signal, and
a rising edge and a falling edge of an effective pulse signal outputted by the signal output terminal are aligned with a falling edge of the first clock signal inputted by the first clock signal terminal.

### Claim 3 (depends on 1)

The light-emitting control signal generation circuit according to claim 1, wherein:
a pulse width of the effective pulse signal inputted by the signal input terminal is an integer multiple of a pulse width of a clock signal cycle inputted by the first clock signal terminal and the second clock signal terminal.

### Claim 4 (depends on 1)

The light-emitting control signal generation circuit according to claim 1, wherein:
the effective pulse signal inputted by the signal input terminal has an extending cycle same as an effective pulse signal outputted by the signal output terminal.

### Claim 5 (depends on 1)

The light-emitting control signal generation circuit according to claim 1, wherein:
the first voltage signal inputted by the first voltage signal terminal has a low level and the second voltage signal inputted by the second voltage signal terminal has a high level.

### Claim 6 (depends on 1)

The light-emitting control signal generation circuit according to claim 1, wherein:
the first control module includes a first control unit and a charge pump unit,
a first terminal of the first control unit is electrically connected to the signal input terminal, a second terminal of the first control unit is electrically connected to the first clock signal terminal, and a third terminal of the first control unit is electrically connected to the first node,
the first control unit, under a control of the first clock signal inputted by the first clock signal terminal, is configured to transmit the effective pulse signal inputted by the signal input terminal to the first node,
a first terminal of the charge pump unit is electrically connected to the second clock signal terminal, and a second terminal of the charge pump unit is electrically connected to the first node, and
the charge pump unit, under a control of the second clock signal inputted by the second clock signal terminal, is configured to strengthen the potential of the first node.

### Claim 7 (depends on 6)

The light-emitting control signal generation circuit according to claim 6, wherein:
the first control unit includes a second switching transistor, wherein a gate electrode of the second switching transistor is electrically connected to the first clock signal terminal, a source electrode of the second switching transistor is electrically connected to the signal input terminal, and a drain electrode of the second switching transistor is electrically connected to the first node, and
the charge pump unit includes a first capacitor, wherein a first terminal of the first capacitor is electrically connected to the first node, and a second terminal of the first capacitor is electrically connected to the second clock signal terminal.

### Claim 8 (depends on 7)

The light-emitting control signal generation circuit according to claim 7, wherein:
the charge pump unit further includes a first switching transistor, wherein a gate electrode of the first switching transistor is electrically connected to the signal input terminal, a source electrode of the first switching transistor is electrically connected to the second clock signal terminal, and a drain electrode of the first switching transistor is electrically connected to the second terminal of the first capacitor, and
the first switching transistor, under a control of the effective pulse signal inputted by the signal input terminal, is configured to transmit the second clock signal inputted by the second clock signal terminal to the second terminal of the first capacitor, thereby strengthening the potential of the first node.

### Claim 9 (depends on 6)

The light-emitting control signal generation circuit according to claim 6, wherein:
the first control unit further includes a current-limiting unit, wherein:
a first terminal of the current-limiting unit is electrically connected to the first voltage signal terminal, a second terminal of the current-limiting unit is electrically connected to the third node, and a third terminal of the current-limiting unit is electrically connected to the first node, and
the current-limiting unit, under a control of the first voltage signal inputted by the first voltage signal terminal, is configured to conduct the third terminal of the first control unit with the first node.

### Claim 10 (depends on 9)

The light-emitting control signal generation circuit according to claim 9, wherein:
the current-limiting unit includes an eleventh switching transistor and a second capacitor, wherein:
a gate electrode of the eleventh switching transistor is electrically connected to the first voltage signal terminal, a source electrode of the eleventh switching transistor is electrically connected to the third node, and further electrically connected to the gate electrode of the eleventh switching transistor through the second capacitor, and a drain electrode of the eleventh switching transistor is electrically connected to the first node.

### Claim 11 (depends on 1)

The light-emitting control signal generation circuit according to claim 1, wherein:
the second control module includes a second control unit, a third control unit and a fourth control unit, wherein:
a first terminal of the second control unit is electrically connected to the first clock signal terminal, a second terminal of the second control unit is electrically connected to the first node, and a third terminal of the second control unit is electrically connected to a fourth node,
the second control unit is configured to transmit the first clock signal inputted by the first clock signal terminal to the fourth node, under a control of the first clock signal inputted by the first clock signal terminal, and to transmit the first clock signal inputted by the first clock signal terminal to the fourth node, under a control of the potential of the first node,
a first terminal of the third control unit is electrically connected to the fourth node, a second terminal of the third control unit is electrically connected to the first clock signal terminal, a third terminal of the third control unit is electrically connected to the second voltage signal terminal, a fourth terminal of the third control unit is electrically connected to the second clock signal terminal, and a fifth terminal of the third control unit is electrically connected to the fifth node,
the third control unit is configured to transmit the second clock signal inputted by the second clock signal terminal to the fifth node, under a control of the first clock signal inputted by the first clock signal terminal, and to transmit the second clock signal inputted by the second clock signal terminal to the fifth node, under a control of a potential of the fourth node,
a first terminal of the fourth control unit is electrically connected to the fifth node, a second terminal of the fourth control unit is electrically connected to the first voltage signal terminal, and a third terminal of the fourth control unit is electrically connected to the second node, and
the fourth control unit, under a control of a potential of the fifth node, is configured to transmit the first voltage signal inputted by the first voltage signal terminal to the second node.

### Claim 12 (depends on 11)

The light-emitting control signal generation circuit according to claim 11, wherein:
the second control unit includes a ninth switching transistor and a tenth switching transistor, wherein a gate electrode and a source electrode of the ninth switching transistor are electrically connected to the first clock signal terminal, a drain electrode of the ninth switching transistor is electrically connected to the fourth node, a gate electrode of the tenth switching transistor is electrically connected to the first node, a source electrode of the tenth switching transistor is electrically connected to the first clock signal terminal, and a drain electrode of the tenth switching transistor is electrically connected to the fourth node,
the third control unit includes a third switching transistor, an eighth switching transistor and a fourth capacitor, wherein a gate electrode of the third switching transistor is electrically connected to the first clock signal terminal, a source electrode of the third switching transistor is electrically connected to the second voltage signal terminal, a drain electrode of the third switching transistor is electrically connected to the fifth node, a gate electrode of the eighth switching transistor is electrically connected to the fourth node, a source electrode of the eighth switching transistor is electrically connected to the second clock signal terminal, a drain electrode of the eighth switching transistor is electrically connected to the fifth node, and further electrically connected to the gate electrode of the eighth switching transistor through the fourth capacitor, and
the fourth control unit includes a seventh switching transistor, wherein a gate electrode of the seventh switching transistor is electrically connected to the fifth node, a source electrode of the seventh switching transistor is electrically connected to the first voltage signal terminal, and a drain electrode of the seventh switching transistor is electrically connected to the second node.

### Claim 13 (depends on 12)

The light-emitting control signal generation circuit according to claim 12, wherein:
the ninth switching transistor and the tenth switching transistor are double-gate switching transistors.

### Claim 14 (depends on 1)

The light-emitting control signal generation circuit according to claim 1, wherein:
the interlocking stabilization module includes a fifth control unit and a sixth control unit, wherein:
a first terminal of the fifth control unit is electrically connected to the second control module, a second terminal of the fifth control unit is electrically connected to the second voltage signal terminal, and a third terminal of the fifth control unit is electrically connected to the third node,
the fifth control unit, under a control of the second control module, is configured to transmit the second voltage signal inputted by the second voltage signal terminal to the third node, thereby stabilizing the potential of the third node,
a first terminal of the sixth control unit is electrically connected to the third node, a second terminal of the sixth control unit is electrically connected to the second voltage signal terminal, and a third terminal of the sixth control unit is electrically connected to the second node, and
the sixth control unit, under a control of the potential of the third node, is configured to transmit the second voltage signal inputted by the second voltage signal terminal to the second node.

### Claim 15 (depends on 14)

The light-emitting control signal generation circuit according to claim 14, wherein:
the fifth control unit includes a fourteenth switching transistor, wherein a gate electrode of the fourteenth switching transistor is electrically connected to the second control module, a source electrode of the fourteenth switching transistor is electrically connected to the second voltage signal terminal, and a drain electrode of the fourteenth switching transistor is electrically connected to the third node, and
the sixth control unit includes a fourth switching transistor, wherein a gate electrode of the fourth switching transistor is electrically connected to the third node, a source electrode of the fourth switching transistor is electrically connected to the second voltage signal terminal, and
a drain electrode of the fourth switching transistor is electrically connected to the second node.

### Claim 16 (depends on 1)

The light-emitting control signal generation circuit according to claim 1, wherein:
the output module includes a first output unit and a second output unit, wherein:
a first terminal of the first output unit is electrically connected to the first node, a second terminal of the first output unit is electrically connected to the first voltage signal terminal, and a third terminal of the first output unit is electrically connected to the signal output terminal,
the first output unit, under the control of the potential of the first node, is configured to transmit the first voltage signal inputted by the first voltage signal terminal to the signal output terminal,
a first terminal of the second output unit is electrically connected to the second node, a second terminal of the second output unit is electrically connected to the second voltage signal terminal, and a third terminal of the second output unit is electrically connected to the signal output terminal, and
the second output unit, under a control of the potential of the second node, is configured to transmit the second voltage signal inputted by the second voltage signal terminal to the signal output terminal.

### Claim 17 (depends on 16)

The light-emitting control signal generation circuit according to claim 16, wherein:
the first output unit includes a sixth switching transistor, wherein a gate electrode of the sixth switching transistor is electrically connected to the first node, a source electrode of the sixth switching transistor is electrically connected to the first voltage signal terminal, and a drain electrode of the sixth switching transistor is electrically connected to the signal output terminal, and
the second output unit includes a fifth switching transistor and a third capacitor, wherein a gate electrode of the fifth switching transistor is electrically connected to the second node and further electrically connected to the second voltage signal terminal through the third capacitor, a source electrode of the fifth switching transistor is electrically connected to the second voltage signal terminal, and a drain electrode of the fifth switching transistor is electrically connected to the signal output terminal.

### Claim 18

A display panel comprising a cascade circuit including a plurality of light-emitting control signal generation circuits including a light-emitting control signal generation circuit, wherein the light-emitting control signal generation circuit comprises:
a first control module;
an interlocking stabilization module;
a second control module; and
an output module, wherein:
the first control module is configured to control a potential of a first node, under a control of an effective pulse signal inputted by a signal input terminal, a first clock signal inputted by a first clock signal terminal and a second clock signal inputted by a second clock signal terminal,
the second control module is configured to control a potential of a second node, under a control of the first clock signal inputted by the first clock signal terminal, the second clock signal inputted by the second clock signal terminal, a first voltage signal inputted by a first voltage signal terminal, a second voltage signal inputted by a second voltage signal terminal and the potential of the first node,
the interlocking stabilization module is configured to stably control a potential of a third node, under a control of the second voltage signal inputted by the second voltage signal terminal, and
the output module is configured to transmit the first voltage signal inputted by the first voltage signal terminal to a signal output terminal under a control of the potential of the first node and the potential of the third node, and to transmit the second voltage signal inputted by the second voltage signal terminal to the signal output terminal under a control of the potential of the second node;
wherein:
except for a last level of the light-emitting signal generation circuit in the cascade circuit, a signal output terminal of each level of the light-emitting signal generation circuit is electrically connected to a signal input terminal of a next level of the light-emitting signal generation circuit, and
an initiating pulse signal is supplied to a signal input terminal of a first level of the light-emitting signal generation circuit.

### Claim 19 (depends on 18)

The display panel according to claim 18, wherein:
a first clock signal terminal of each odd-numbered level of light-emitting control signal generation circuit is electrically connected to a first clock signal wire, and a second clock signal terminal of the each odd-numbered level of light-emitting control signal generation circuit is electrically connected to a second clock signal wire, and
a first clock signal terminal of each even-numbered level of light-emitting control signal generation circuit is electrically connected to the second clock signal wire, and a second clock signal terminal of the each even-numbered level of light-emitting control signal generation circuit is electrically connected to the first clock signal wire.

### Claim 20

A display apparatus comprises a display panel, wherein the light-emitting control signal generation circuit, comprising:
a first control module;
an interlocking stabilization module;
a second control module; and
an output module, wherein:
the first control module is configured to control a potential of a first node, under a control of an effective pulse signal inputted by a signal input terminal, a first clock signal inputted by a first clock signal terminal and a second clock signal inputted by a second clock signal terminal,
the second control module is configured to control a potential of a second node, under a control of the first clock signal inputted by the first clock signal terminal, the second clock signal inputted by the second clock signal terminal, a first voltage signal inputted by a first voltage signal terminal, a second voltage signal inputted by a second voltage signal terminal and the potential of the first node,
the interlocking stabilization module is configured to stably control a potential of a third node, under a control of the second voltage signal inputted by the second voltage signal terminal, and
the output module is configured to transmit the first voltage signal inputted by the first voltage signal terminal to a signal output terminal under a control of the potential of the first node and the potential of the third node, and to transmit the second voltage signal inputted by the second voltage signal terminal to the signal output terminal under a control of the potential of the second node.