CONTROL HEAD WITH ELECTROLUMINESCENT PANEL IN LAND MOBILE RADIO

• US 20180075807A1
• Filed: 11/20/2017
• Published: 03/15/2018
• Est. Priority Date: 11/06/2008
• Status: Active Application

• Current Assignee: E F Johnson Company (JVC Kenwood Corporation)
• Original Assignee: E F Johnson Company (JVC Kenwood Corporation)
• Inventors: Reavill, Dulie, Dunnigan, William Earl, Frandsen, Troy
• Granted Patent: US 10,643,540 B2
• Time in Patent Office: Days
• CPC Class Codes: F21V 23/003 the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
• CPC Class Codes: F21V 23/04 the elements being switches safety devices F21V25/00
• CPC Class Codes: F21Y 2105/00 Planar light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F21Y 2115/20 Electroluminescent [EL] light sources
• CPC Class Codes: G06F 3/0482 Interaction with lists of selectable items, e.g. menus
• CPC Class Codes: G06F 3/04842 Selection of displayed objects or displayed text elements G06F3/0482 takes precedence
• CPC Class Codes: G06T 1/60 Memory management
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 3/30 using electroluminescent panels
• CPC Class Codes: G09G 3/3258 with pixel circuitry controlling the voltage across the light-emitting element
• CPC Class Codes: H01H 13/83 characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
• CPC Class Codes: H04B 1/401 for selecting or indicating operating mode
• CPC Class Codes: H05B 33/12 Light sources with substantially two-dimensional radiating surfaces
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light

Abstract

An exemplary land mobile radio control head and method are provided. In one embodiment, the control head has the capability to utilize halo light of the control head to implement a multi-function indicator that communicates a state of the land mobile radio. In another embodiment, the control head has the capability to provide buffer images constructed from data received from the land mobile radio into a video stream for rendering on an electroluminescent display. In another embodiment, the control head provides the capability for a user to modify a configuration stored on the land mobile radio that defines one of several display modes to be utilized in generating data for use in forming images to be rendered on an electroluminescent display.

Claims

1. A control head of a land mobile radio, the control head of the land mobile radio comprising:

an electroluminescent display showing labels for a plurality of function buttons under the electroluminescent display and a symbol indicating operating status of the land mobile radio;

a control head controller configured to receive data to construct the data into one or more images; and

a video driver connected to the control head controller and buffering the one or more images into a video stream for rendering on the electroluminescent display,

wherein the one or more images comprises the labels and the symbol,

wherein the one or more images comprising the labels is displayed continuously,

wherein the one or more images comprising the symbol is selectably displayed in response to a change in a state of the land mobile radio, and

wherein the control head controller is further configured to detect the change in the state of the land mobile radio and to control activation of the one or more images comprising the symbol to indicate the changed state of the land mobile radio.

2. The control head of claim 1, further comprising:

a high voltage power supply receiving input power from a radio battery supply through a FET switch controlled by the video driver,

wherein output voltage levels are adjustable by a volume adjustment potentiometer to set a brightness level of the electroluminescent display, and

wherein power supply switching frequency is controlled by the video driver.

3. The control head of claim 1, wherein the video driver contains a display data buffer, a frame timing generator, and display control logic to control operation of a negative row voltage charge/discharge FET, a positive row voltage charge/discharge FET, a row HV driver/shift register, and a column HV driver/shift register.

4. The control head of claim 1, wherein the video driver contains a display data buffer that is a RAM that is accessed by the control head controller to load pixel data for the one or more images and by internal frame generator logic to read the pixel data, and the control head controller to load data into the display buffer though a parallel data port.

5. The control head of claim 1, wherein the video driver contains a frame timing generator that generates internal frame start, line start, pixel data, and pixel clock signals that are used by display control logic to control the circuitry connected to the electroluminescent display.

6. The control head of claim 1, further comprising:

a first LED to provide a first light; and

a second LED to provide a second light,

wherein the control head controller configured to detect the change in the state of the land mobile radio is further configured to control activation of the first LED to indicate the changed state of the land mobile radio.

7. The control head of claim 6, wherein the control head controller is further configured to control activation of the second LED to illuminate the electroluminescent display during an idle state of the land mobile radio.

8. The control head of claim 7, wherein an intensity of the first LED is fixed, and an intensity of the second LED is adjustable.

9. The control head of claim 1, wherein the first LED and the second LED both illuminate a first light pipe to illuminate the electroluminescent display.

10. The control head of claim 1,

wherein the first LED illuminates a first light pipe to illuminate a user actuable button, and

wherein the second LED illuminates a second light pipe to illuminate the electroluminescent display.

11. A system for configuring a control head of a land mobile radio having an electroluminescent display, the system comprising:

a computer memory storing a configuration;

a controller configured to generate display data according to one of various display modes as defined by the configuration;

a control head having the electroluminescent display rendering images formed of the display data,

wherein the images comprise labels for a plurality of function buttons under the electroluminescent display,

wherein the images comprise a symbol indicating operating status of the land mobile radio;

a computer processor executing a process whereby a user of the computer processor specifies the display mode to be defined by the configuration; and

a control head controller to determine the state of the land mobile radio, to detect a change in the state of the land mobile radio, and to control activation of the images displayed on the electroluminescent display to indicate the changed state of the land mobile radio and displaying the symbol indicating operating status of the land mobile radio proximate to the labels for the plurality of function buttons.

12. The system of claim 11, wherein the computer processor utilizes a menu whereby the user selects whether to inhibit display of a zone and a channel to modify the configuration.

13. The system of claim 11, further comprising:

a first LED to provide a first light; and

a second LED to provide a second light,

wherein the control head controller to detect the change in the state of the land mobile radio is configured to control activation of the first LED to indicate the changed state of the land mobile radio.

14. The system of claim 13, wherein the control head controller is further configured to control activation of the second LED to illuminate the electroluminescent display during an idle state of the land mobile radio.

15. The system of claim 13, wherein an intensity of the first LED is fixed, and an intensity of the second LED is adjustable.

16. The system of claim 13, wherein an intensity of the second LED is adjustable via a menu whereby the user selects the display mode to modify the configuration.

17. The system of claim 13, wherein the first LED and the second LED both illuminate a first light pipe to illuminate the electroluminescent display.

18. A control head of a land mobile radio, the control head of the land mobile radio comprising:

a plurality of indicator LEDs comprising at least a first color LED having a first hue, a second color LED having a second hue, and a third color LED having a third hue and controllable independently of the first color LED and independently of the second color LED,

a signal line to the third color LED and connected to a control head controller; and

the control head controller configured to determine a state of the land mobile radio as being one of a transmit state, a receive state, or an idle state,

wherein the control head controller is further configured to detect the change in the state of the land mobile radio and to control activation of the plurality of indicator LEDs to indicate the changed state of the land mobile radio by illuminating the third color LED the third hue to indicate the changed state is the idle state, illuminating the first color LED a first hue to indicate the changed state is the transmit state, and illuminating the second color LED a second hue to indicate the changed state is the receive state, and

wherein the first hue comprises a brightness separately controllable by the control head controller and different than a brightness of the second hue when the second color LED is illuminated and different than a brightness of the third hue when the third color LED is illuminated.

19. The control head of claim 18, wherein the brightness the first LED to indicate the changed state is the idle state is adjustable, and a brightness of the second LED to indicate the changed state is the transmit state is fixed.

20. The control head of claim 19, wherein the first LED and the second LED are simultaneously illuminable by the control head controller, and wherein the brightness of the first LED is adjustable via a menu whereby the user selects a display mode of the control head controller.